Fix prod build

- Add crouch cancelling
- Add IASA for aerial attacks
- Add scaffolding for autocancel
- Add hitbox group system
- Add new ergonomic features for attack scripting
- Add more information to the hitbox viewer
- Improve the looks of debug capsules

Cargo.lock

@@ -516,7 +516,6 @@ checksum = "4bfadbebfc6599aa59289b754ac30023959854304f3d393da2cf62bb3cd5df8f"
 dependencies = [
  "bevy_dylib",
  "bevy_internal",
- "tracing",
 ]
 
 [[package]]
@@ -695,7 +694,6 @@ dependencies = [
  "downcast-rs 2.0.2",
  "log",
  "thiserror 2.0.19",
- "tracing",
  "variadics_please",
  "wasm-bindgen",
  "web-sys",
@@ -1003,7 +1001,6 @@ dependencies = [
  "slotmap",
  "smallvec",
  "thiserror 2.0.19",
- "tracing",
  "variadics_please",
 ]
 
@@ -1424,11 +1421,9 @@ dependencies = [
  "bevy_platform",
  "bevy_utils",
  "tracing",
- "tracing-error",
  "tracing-log",
  "tracing-oslog",
  "tracing-subscriber",
- "tracing-tracy",
  "tracing-wasm",
 ]
 
@@ -1738,11 +1733,9 @@ dependencies = [
  "naga",
  "nonmax",
  "offset-allocator",
- "profiling",
  "send_wrapper",
  "smallvec",
  "thiserror 2.0.19",
- "tracy-client",
  "variadics_please",
  "wasm-bindgen",
  "weak-table",
@@ -3470,21 +3463,6 @@ dependencies = [
  "rusb",
 ]
 
-[[package]]
-name = "generator"
-version = "0.8.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54ade96dc9003043bce7c035c85a9df5a858bfb2039c5a2e6fdf00f324f6c551"
-dependencies = [
- "cc",
- "cfg-if",
- "libc",
- "log",
- "rustversion",
- "windows-link",
- "windows-result",
-]
-
 [[package]]
 name = "gethostname"
 version = "1.1.0"
@@ -4403,19 +4381,6 @@ version = "0.4.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"
 
-[[package]]
-name = "loom"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "419e0dc8046cb947daa77eb95ae174acfbddb7673b4151f56d1eed8e93fbfaca"
-dependencies = [
- "cfg-if",
- "generator",
- "scoped-tls",
- "tracing",
- "tracing-subscriber",
-]
-
 [[package]]
 name = "mach2"
 version = "0.5.0"
@@ -5664,20 +5629,6 @@ name = "profiling"
 version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d595e54a326bc53c1c197b32d295e14b169e3cfeaa8dc82b529f947fba6bcf5"
-dependencies = [
- "profiling-procmacros",
- "tracing",
-]
-
-[[package]]
-name = "profiling-procmacros"
-version = "1.0.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4488a4a36b9a4ba6b9334a32a39971f77c1436ec82c38707bce707699cc3bbcb"
-dependencies = [
- "quote",
- "syn 2.0.119",
-]
 
 [[package]]
 name = "pxfm"
@@ -6878,16 +6829,6 @@ dependencies = [
  "valuable",
 ]
 
-[[package]]
-name = "tracing-error"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b1581020d7a273442f5b45074a6a57d5757ad0a47dac0e9f0bd57b81936f3db"
-dependencies = [
- "tracing",
- "tracing-subscriber",
-]
-
 [[package]]
 name = "tracing-log"
 version = "0.2.0"
@@ -6929,17 +6870,6 @@ dependencies = [
  "tracing-log",
 ]
 
-[[package]]
-name = "tracing-tracy"
-version = "0.11.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0eaa1852afa96e0fe9e44caa53dc0bd2d9d05e0f2611ce09f97f8677af56e4ba"
-dependencies = [
- "tracing-core",
- "tracing-subscriber",
- "tracy-client",
-]
-
 [[package]]
 name = "tracing-wasm"
 version = "0.2.1"
@@ -6951,27 +6881,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "tracy-client"
-version = "0.18.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6131992ff3e2cb96f407eb4eb005427ba15e2687260d99089b90e60e33169ce0"
-dependencies = [
- "loom",
- "once_cell",
- "tracy-client-sys",
-]
-
-[[package]]
-name = "tracy-client-sys"
-version = "0.29.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab27f167b093214c68413a2e0bcd318f0591af475597405ff68138ba0a433379"
-dependencies = [
- "cc",
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "tree_magic_mini"
 version = "3.2.2"

Cargo.toml

@@ -9,7 +9,6 @@ authors = [""]
 [features]
 default = ["development", "debug_features", "gamecube-adapter"]
 development = ["bevy/dynamic_linking", "bevy/file_watcher", "bevy/embedded_watcher", "hitbox-viewer"]
-tracy = ["bevy/trace_tracy"]
 debug_features = ["bevy/free_camera"]
 gamecube-adapter = ["dep:gc-adapter-neo"]
 hitbox-viewer = ["bevy/bevy_dev_tools", "dep:egui_extras"]

src/debug_tools.rs

@@ -116,7 +116,6 @@ enum DebugFlag {
     AttackHitboxes,
     Hurtboxes,
     Camera,
-    LedgeGrab,
     DrawThroughGeometry,
     FrameStepping,
 }
@@ -165,10 +164,6 @@ const FIGHTER_MENU: &[DebugMenuEntry] = &[
         label: "Attack hitboxes",
         flag: DebugFlag::AttackHitboxes,
     },
-    DebugMenuEntry::Toggle {
-        label: "Ledge grab",
-        flag: DebugFlag::LedgeGrab,
-    },
     DebugMenuEntry::Toggle {
         label: "Hurtboxes",
         flag: DebugFlag::Hurtboxes,
@@ -265,7 +260,6 @@ pub struct DebugSettings {
     pub attack_hitboxes: bool,
     pub hurtboxes: bool,
     pub camera: bool,
-    pub ledge_grab: bool,
     pub draw_through_geometry: bool,
     pub motion_sampling: PresentationMotionMode,
     pub game_speed: GameSpeedDebug,
@@ -289,7 +283,6 @@ impl Default for DebugSettings {
             attack_hitboxes: false,
             hurtboxes: false,
             camera: false,
-            ledge_grab: false,
             draw_through_geometry: false,
             motion_sampling: PresentationMotionMode::default(),
             game_speed: GameSpeedDebug::Full,
@@ -357,7 +350,6 @@ impl DebugSettings {
             DebugFlag::Hurtboxes => self.hurtboxes,
             DebugFlag::DrawThroughGeometry => self.draw_through_geometry,
             DebugFlag::Camera => self.camera,
-            DebugFlag::LedgeGrab => self.ledge_grab,
             DebugFlag::FrameStepping => self.frame_stepping,
         }
     }
@@ -376,7 +368,6 @@ impl DebugSettings {
                 self.draw_through_geometry = !self.draw_through_geometry
             }
             DebugFlag::Camera => self.camera = !self.camera,
-            DebugFlag::LedgeGrab => self.ledge_grab = !self.ledge_grab,
             DebugFlag::FrameStepping => self.frame_stepping = !self.frame_stepping,
         }
     }
@@ -935,10 +926,6 @@ pub fn camera_debug_enabled(settings: Res<DebugSettings>) -> bool {
     settings.camera
 }
 
-pub fn ledge_grab_enabled(settings: Res<DebugSettings>) -> bool {
-    settings.ledge_grab
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;

src/debug_tools/save_state.rs

@@ -1,26 +1,12 @@
 use bevy::prelude::*;
 
 use crate::{
-    camera::MatchCamera,
+    camera::MatchCamera, fighter::{
-    fighter::{
+        FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake, FighterInvulnerabilityState, FighterPendingRespawn, FighterPreviousFacingDirection, FighterPreviousTranslation, FighterSurfaceState, FighterTranslation, FighterVelocity, animation::FighterAnimationFrame, attack::{
-        FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake,
+            FighterDamage, FighterKnockbackVelocity, FighterPendingHitReaction, FighterPendingHits,
-        FighterInvulnerabilityState, FighterLedgeInformation, FighterPendingRespawn,
+            FighterSolvedHurtboxes, FighterStaleMoveQueue,
-        FighterPreviousFacingDirection, FighterPreviousTranslation, FighterSurfaceState,
+        }, baked_animation::FighterBoneMatrices, state::FighterState,
-        FighterTranslation, FighterVelocity,
+    }, input::FighterInput, match_runtime::MatchState, player::Player, stage::line::StageCollision,
-        animation::FighterAnimationFrame,
-        attack::{
-            FighterDamage, FighterKnockbackState, FighterKnockbackVelocity,
-            FighterPendingHitReaction, FighterPendingHits, FighterSolvedHurtboxes,
-            FighterStaleMoveQueue,
-        },
-        baked_animation::FighterBoneMatrices,
-        ecb::FighterDesiredECB,
-        state::FighterState,
-    },
-    input::FighterInput,
-    match_runtime::MatchState,
-    player::Player,
-    stage::line::StageCollision,
 };
 
 #[derive(Resource, Default)]
@@ -41,7 +27,6 @@ struct FighterCheckpoint {
     entity: Entity,
     handle: usize,
     ecb: FighterECB,
-    desired_ecb: FighterDesiredECB,
     previous_ecb: crate::fighter::ecb::FighterPreviousECB,
     velocity: FighterVelocity,
     translation: FighterTranslation,
@@ -56,7 +41,6 @@ struct FighterCheckpoint {
     hitstop: FighterHitstop,
     hitstop_shake: FighterHitstopShake,
     knockback_velocity: FighterKnockbackVelocity,
-    knockback_state: FighterKnockbackState,
     stale_moves: FighterStaleMoveQueue,
     hitboxes: FighterHitboxes,
     solved_hurtboxes: FighterSolvedHurtboxes,
@@ -64,7 +48,6 @@ struct FighterCheckpoint {
     surface: FighterSurfaceState,
     pending_respawn: FighterPendingRespawn,
     invulnerability_state: FighterInvulnerabilityState,
-    ledge_information: FighterLedgeInformation,
 }
 
 pub(super) fn save_or_restore(world: &mut World) {
@@ -147,7 +130,6 @@ pub(super) fn save_or_restore(world: &mut World) {
 
         let mut entity = world.entity_mut(saved.entity);
         entity.insert(saved.ecb);
-        entity.insert(saved.desired_ecb);
         entity.insert(saved.previous_ecb);
         entity.insert(saved.velocity);
         entity.insert(saved.translation);
@@ -162,7 +144,6 @@ pub(super) fn save_or_restore(world: &mut World) {
         entity.insert(saved.hitstop);
         entity.insert(saved.hitstop_shake);
         entity.insert(saved.knockback_velocity);
-        entity.insert(saved.knockback_state);
         entity.insert(saved.stale_moves.clone());
         entity.insert(saved.hitboxes.clone());
         entity.insert(saved.solved_hurtboxes.clone());
@@ -170,7 +151,6 @@ pub(super) fn save_or_restore(world: &mut World) {
         entity.insert(saved.surface.clone());
         entity.insert(saved.pending_respawn.clone());
         entity.insert(saved.invulnerability_state.clone());
-        entity.insert(saved.ledge_information.clone());
     }
     world.insert_resource(checkpoint.pending_hits.clone());
     world.insert_resource(checkpoint.stage_collision);
@@ -187,7 +167,6 @@ fn capture_fighter(world: &World, entity: Entity) -> Option<FighterCheckpoint> {
         entity,
         handle: fighter.get::<Player>()?.handle,
         ecb: *fighter.get::<FighterECB>()?,
-        desired_ecb: *fighter.get::<FighterDesiredECB>()?,
         previous_ecb: *fighter.get::<crate::fighter::ecb::FighterPreviousECB>()?,
         velocity: *fighter.get::<FighterVelocity>()?,
         translation: *fighter.get::<FighterTranslation>()?,
@@ -202,7 +181,6 @@ fn capture_fighter(world: &World, entity: Entity) -> Option<FighterCheckpoint> {
         hitstop: *fighter.get::<FighterHitstop>()?,
         hitstop_shake: *fighter.get::<FighterHitstopShake>()?,
         knockback_velocity: *fighter.get::<FighterKnockbackVelocity>()?,
-        knockback_state: *fighter.get::<FighterKnockbackState>()?,
         stale_moves: fighter.get::<FighterStaleMoveQueue>()?.clone(),
         hitboxes: fighter.get::<FighterHitboxes>()?.clone(),
         solved_hurtboxes: fighter.get::<FighterSolvedHurtboxes>()?.clone(),
@@ -210,7 +188,6 @@ fn capture_fighter(world: &World, entity: Entity) -> Option<FighterCheckpoint> {
         surface: fighter.get::<FighterSurfaceState>()?.clone(),
         pending_respawn: fighter.get::<FighterPendingRespawn>()?.clone(),
         invulnerability_state: fighter.get::<FighterInvulnerabilityState>()?.clone(),
-        ledge_information: fighter.get::<FighterLedgeInformation>()?.clone(),
     })
 }
 

src/fighter/animation.rs

@@ -87,10 +87,6 @@ pub enum AnimKind {
     CrouchEnter,
     CrouchIdle,
     CrouchExit,
-    LedgeWait,
-    LedgeJump,
-    LedgeGetUp,
-    LedgeGrab,
 
     PlatformPass,
 
@@ -104,7 +100,4 @@ pub enum AnimKind {
     AttackDownTilt,
     AttackNeutralAir,
     AttackForwardAir,
-    AttackDownAir,
-    AttackDash,
-    AttackUpSmash,
 }

src/fighter/attack/directional_influence.rs

@@ -15,16 +15,6 @@ pub fn apply_directional_influence(
     let (sin, cos) = attack_angle.sin_cos();
     let base_launch_direction = FGVec2::new(cos, sin);
 
-    apply_directional_influence_to_direction(receiver_stick, base_launch_direction, di_max_angle)
-}
-
-/// Applies DI to an already-computed launch direction. This is used after
-/// knockback stacking, where the resulting angle may differ from either hit.
-pub fn apply_directional_influence_to_direction(
-    receiver_stick: FGVec2,
-    base_launch_direction: FGVec2,
-    di_max_angle: FGi32,
-) -> FGVec2 {
     let Some(base_launch_direction) = base_launch_direction.normalize() else {
         return FGVec2::ZERO;
     };
@@ -40,20 +30,14 @@ pub fn apply_directional_influence_to_direction(
         -di_max_angle.to_fixed::<FGWide>(),
         di_max_angle.to_fixed::<FGWide>(),
     );
-    let (sin, cos) = angle_change.to_fixed::<FGi32>().sin_cos();
+    let (sin, cos) = (attack_angle + angle_change.to_fixed::<FGi32>()).sin_cos();
-    FGVec2::new(
+    FGVec2::new(cos, sin).normalize_or_zero()
-        base_launch_direction.x * cos - base_launch_direction.y * sin,
-        base_launch_direction.x * sin + base_launch_direction.y * cos,
-    )
-    .normalize_or_zero()
 }
 
 #[cfg(test)]
 mod test {
     use crate::{
-        fighter::attack::directional_influence::{
+        fighter::attack::directional_influence::apply_directional_influence,
-            apply_directional_influence, apply_directional_influence_to_direction,
-        },
         math::{int::FGi32, vec::FGVec2},
     };
 
@@ -82,17 +66,4 @@ mod test {
         assert!(di.x > FGi32::ZERO);
         assert!(di.y < FGi32::ZERO);
     }
-
-    #[test]
-    fn vector_di_preserves_a_stacked_direction_without_input() {
-        let direction = FGVec2::lit("-0.6", "0.8");
-        let result = apply_directional_influence_to_direction(
-            FGVec2::ZERO,
-            direction,
-            FGi32::lit("18.0"),
-        );
-        const EPSILON: FGi32 = FGi32::from_bits(6);
-        assert!(result.x.abs_diff(direction.x) < EPSILON);
-        assert!(result.y.abs_diff(direction.y) < EPSILON);
-    }
 }

src/fighter/attack/mod.rs

@@ -33,75 +33,6 @@ use crate::{
 #[derive(Deref, Component, Default, Hash, Debug, Copy, Clone)]
 pub struct FighterKnockbackVelocity(pub FGVec2);
 
-/// Lifecycle state for the currently active launch velocity.
-///
-/// This counts frames where knockback was actually applied to movement; hitstop
-/// therefore does not advance it. Melee uses this age to decide whether a
-/// subsequent airborne hit replaces or stacks with the previous launch.
-#[derive(Component, Default, Hash, Debug, Copy, Clone)]
-pub struct FighterKnockbackState {
-    pub frames_since_launch: u32,
-}
-
-impl FighterKnockbackState {
-    pub fn restart(&mut self) {
-        self.frames_since_launch = 0;
-    }
-
-    pub fn clear(&mut self) {
-        self.frames_since_launch = 0;
-    }
-
-    pub fn advance(&mut self) {
-        self.frames_since_launch = self.frames_since_launch.saturating_add(1);
-    }
-
-    pub fn can_stack(&self, minimum_frames: u32) -> bool {
-        self.frames_since_launch >= minimum_frames
-    }
-}
-
-fn stack_knockback_component(previous: FGi32, new: FGi32) -> FGi32 {
-    if previous.is_zero() {
-        return new;
-    }
-    if new.is_zero() {
-        return previous;
-    }
-
-    if previous.signum() != new.signum() {
-        previous + new
-    } else if previous.abs() > new.abs() {
-        previous
-    } else {
-        new
-    }
-}
-
-/// Applies Melee's knockback-stacking rule independently to both axes.
-pub fn stack_knockback(previous: FGVec2, new: FGVec2) -> FGVec2 {
-    FGVec2::new(
-        stack_knockback_component(previous.x, new.x),
-        stack_knockback_component(previous.y, new.y),
-    )
-}
-
-pub fn decay_knockback(
-    velocity: &mut FighterKnockbackVelocity,
-    state: &mut FighterKnockbackState,
-    decay_per_frame: FGi32,
-) {
-    let speed = velocity.length();
-    let next_speed = speed.saturating_sub(decay_per_frame).max(FGi32::ZERO);
-    velocity.0 = velocity.normalize_or_zero() * next_speed;
-
-    if next_speed.is_zero() {
-        state.clear();
-    } else {
-        state.advance();
-    }
-}
-
 #[derive(Debug, Default, Clone, Copy, Serialize, Deserialize, Component, Hash, PartialEq, Eq, PartialOrd, Ord)]
 pub struct FighterDamage(FGi32);
 
@@ -121,8 +52,7 @@ pub enum HitReactionKind {
 pub struct FighterHitReaction {
     pub launch_velocity: FGi32,
     pub launch_angle: FGi32,
-    pub victim_hitstop_frames: HitStop,
+    pub hitstop_frames: HitStop,
-    pub attacker_hitstop_frames: HitStop,
     pub hitstun_frames: u32,
     pub kind: HitReactionKind,
     pub damage: FighterDamage,
@@ -142,53 +72,6 @@ pub struct FighterLastAttackDebug {
     pub trajectory_points: Vec<Vec3>,
 }
 
-#[cfg(test)]
-mod knockback_stacking_tests {
-    use super::*;
-
-    #[test]
-    fn same_direction_keeps_the_stronger_component() {
-        assert_eq!(
-            stack_knockback(FGVec2::lit("3", "8"), FGVec2::lit("5", "4")),
-            FGVec2::lit("5", "8")
-        );
-    }
-
-    #[test]
-    fn opposing_components_add_independently() {
-        assert_eq!(
-            stack_knockback(FGVec2::lit("3", "8"), FGVec2::lit("-5", "-3")),
-            FGVec2::lit("-2", "5")
-        );
-    }
-
-    #[test]
-    fn opposing_components_can_cancel() {
-        assert_eq!(
-            stack_knockback(FGVec2::lit("3", "-4"), FGVec2::lit("-3", "4")),
-            FGVec2::ZERO
-        );
-    }
-
-    #[test]
-    fn zero_components_preserve_the_nonzero_value() {
-        assert_eq!(
-            stack_knockback(FGVec2::lit("0", "2"), FGVec2::lit("-3", "0")),
-            FGVec2::lit("-3", "2")
-        );
-    }
-
-    #[test]
-    fn stacking_threshold_is_inclusive() {
-        let mut state = FighterKnockbackState {
-            frames_since_launch: 9,
-        };
-        assert!(!state.can_stack(10));
-        state.advance();
-        assert!(state.can_stack(10));
-    }
-}
-
 #[derive(Debug, Default, Clone, Deref, DerefMut, Hash, PartialEq, PartialOrd)]
 pub struct HitStop(u32);
 
@@ -337,7 +220,6 @@ pub enum AttackKind {
     UpSmash,
     DownSmash,
     ForwardSmash,
-    DashAttack,
 }
 
 impl AttackKind {
@@ -347,15 +229,14 @@ impl AttackKind {
             AttackKind::Jab => AnimKind::AttackJab1,
             AttackKind::UpTilt => AnimKind::AttackUpTilt,
             AttackKind::ForwardAir => AnimKind::AttackForwardAir,
-            AttackKind::DownAir => AnimKind::AttackDownAir,
             AttackKind::BackAir => AnimKind::AttackUpTilt,
+            AttackKind::DownAir => AnimKind::AttackUpTilt,
             AttackKind::UpAir => AnimKind::AttackUpTilt,
             AttackKind::DownTilt => AnimKind::AttackDownTilt,
             AttackKind::ForwardTilt => AnimKind::AttackForwardTilt,
-            AttackKind::UpSmash => AnimKind::AttackUpSmash,
+            AttackKind::UpSmash => AnimKind::AttackUpTilt,
             AttackKind::DownSmash => AnimKind::AttackUpTilt,
             AttackKind::ForwardSmash => AnimKind::AttackUpTilt,
-            AttackKind::DashAttack => AnimKind::AttackDash,
         }
     }
 }

src/fighter/attack/reaction.rs

@@ -4,7 +4,7 @@ use bevy_ggrs::prelude::GgrsSchedule;
 use super::*;
 use crate::{
     fighter::{
-        Fighter, FighterHitboxes, FighterHitstop, FighterHitstopShake,
+        Fighter, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake,
         FighterHitstopShakeKind, FighterHitstopShakeRole, FighterPendingHitReaction,
         FighterStaleMoveQueue, FighterSurfaceState, errors::FighterErrors,
         manifest::FighterManifest, state::FighterState,
@@ -20,11 +20,11 @@ pub fn resolve_fighter_hits(
     mut pending_hits: ResMut<FighterPendingHits>,
     mut attacker: Query<(
         &mut FighterStaleMoveQueue,
+        &FighterFacingDirection,
         &mut FighterHitboxes,
         &Player,
         &mut FighterHitstop,
         &mut FighterHitstopShake,
-        &FighterTranslation,
     )>,
     mut receiver: Query<(
         &mut FighterDamage,
@@ -33,7 +33,6 @@ pub fn resolve_fighter_hits(
         &FighterState,
         &FighterInvulnerabilityState,
         &FighterSurfaceState,
-        &FighterTranslation,
     )>,
     attack_scripts: Res<Assets<FighterAttackScript>>,
     game_settings: Res<GameSettings>,
@@ -56,7 +55,6 @@ pub fn resolve_fighter_hits(
             receiver_state,
             invuln_state,
             receiver_surface_state,
-            receiver_translation,
         )) = receiver.get_mut(defender)
         else {
             hit_offset = next_defender;
@@ -66,7 +64,7 @@ pub fn resolve_fighter_hits(
         let damage_data = hits[hit_offset..next_defender]
             .iter()
             .filter_map(|hit| {
-                let Ok((stale_move_queue, _, player, _, _, attacker_translation)) =
+                let Ok((stale_move_queue, facing_dir, _, player, _, _)) =
                     attacker.get(hit.attacker)
                 else {
                     return None;
@@ -76,13 +74,12 @@ pub fn resolve_fighter_hits(
                 let damage_received = stale_move_queue
                     .get_attack_damage_multiplier(hit.attack_kind)
                     * hitbox.damage.0;
-                let angle_flip = receiver_translation.0.x <= attacker_translation.0.x;
                 Some((
                     hit.attacker,
                     damage_received,
                     hitbox,
+                    matches!(facing_dir, FighterFacingDirection::Left),
                     player.handle,
-                    angle_flip,
                 ))
             })
             .collect::<Vec<_>>();
@@ -96,35 +93,28 @@ pub fn resolve_fighter_hits(
             .ok_or(FighterErrors::FighterManifestNotFound)?;
         let mut reactions = Vec::with_capacity(damage_data.len());
 
-        let crouch_canceling = if let FighterState::Crouch(crouch_state) = &receiver_state {
+        for (attacker_entity, attack_damage, hitbox, facing_left, attacker_slot) in damage_data {
-            crouch_state.is_crouch_cancelling()
-        } else {
-            false
-        };
-
-        for (attacker_entity, attack_damage, hitbox, attacker_slot, angle_flip) in damage_data {
             let knockback = hitbox.calculate_knockback(
                 &fighter_manifest.attributes,
                 *receiver_damage,
                 FighterDamage(total_damage_received_this_frame),
                 false,
-                crouch_canceling,
+                false,
             );
-            let launch_angle = hitbox.angle.get_angle(
+            let angle = hitbox.angle.get_angle(
                 &knockback,
                 receiver_surface_state.is_grounded(),
                 &game_settings,
             );
-
+            dbg!(knockback, angle);
-            let launch_angle = if angle_flip {
+            let launch_angle = if facing_left {
-                FGi32::lit("180.0") - launch_angle
+                FGi32::lit("180.0") - angle
             } else {
-                launch_angle
+                angle
             };
 
             // Attacker hitstop and data
-            let victim_hitstop_frames = HitStop::calculate(FighterDamage(attack_damage), crouch_canceling);
+            let hitstop = HitStop::calculate(FighterDamage(attack_damage), matches!(receiver_state, FighterState::Crouch(..)));
-            let attacker_hitstop_frames = HitStop::calculate(FighterDamage(attack_damage), false);
             reactions.push((
                 attacker_entity,
                 attacker_slot,
@@ -132,8 +122,7 @@ pub fn resolve_fighter_hits(
                     launch_velocity: knockback.get_launch_speed(&game_settings),
                     launch_angle,
                     hitstun_frames: knockback.get_hitstun_frames(&game_settings),
-                    victim_hitstop_frames,
+                    hitstop_frames: hitstop,
-                    attacker_hitstop_frames,
                     kind: HitReactionKind::Flinch,
                     damage: FighterDamage(attack_damage),
                 },
@@ -148,20 +137,20 @@ pub fn resolve_fighter_hits(
         }
 
         for (attacker_entity, _, reaction) in &reactions {
-            let Ok((.., _, mut hitstop, mut hitstop_shake, _)) = attacker.get_mut(*attacker_entity)
+            let Ok((.., _, mut hitstop, mut hitstop_shake)) = attacker.get_mut(*attacker_entity)
             else {
                 continue;
             };
 
-            if hitstop.remaining_frames < reaction.attacker_hitstop_frames.0 {
+            if hitstop.remaining_frames < reaction.hitstop_frames.0 {
                 let shake_kind = if receiver_state.is_visually_grounded() {
                     FighterHitstopShakeKind::Horizontal
                 } else {
                     FighterHitstopShakeKind::Vertical
                 };
-                hitstop.remaining_frames = reaction.attacker_hitstop_frames.0;
+                hitstop.remaining_frames = reaction.hitstop_frames.0;
                 let shake_frames = reaction
-                    .attacker_hitstop_frames
+                    .hitstop_frames
                     .calculate_shake_frames(&game_settings);
                 hitstop_shake.total_frames = shake_frames;
                 hitstop_shake.remaining_frames = shake_frames;
@@ -184,7 +173,7 @@ pub fn resolve_fighter_hits(
     }
 
     for hit in hits {
-        let Ok((mut stale_move_queue, mut hitboxes, ..)) =
+        let Ok((mut stale_move_queue, _facing_direction, mut hitboxes, ..)) =
             attacker.get_mut(hit.attacker)
         else {
             continue;

src/fighter/attributes.rs

@@ -9,10 +9,6 @@ use crate::{input::FighterInputFrame, math::int::FGi32};
 #[derive(Asset, Clone, Copy, Reflect, Serialize, Deserialize)]
 #[reflect(opaque)]
 pub struct FighterAttributes {
-    /// Fixed horizontal offset of the fighter's grounded pushbox center.
-    pub pushbox_offset: FGi32,
-    /// Fixed horizontal radius used for grounded fighter-to-fighter pushing.
-    pub pushbox_radius: FGi32,
     pub base_walk_accel: FGi32,
     pub stick_walk_accel: FGi32,
     pub max_walk_vel: FGi32,
@@ -51,8 +47,6 @@ pub struct FighterAttributes {
 
     pub air_dodge_intangible_duration: u32,
     pub air_dodge_intangible_start: u32,
-
-    pub dash_attack_cancel_window: u32,
 }
 
 impl FighterAttributes {
@@ -60,9 +54,6 @@ impl FighterAttributes {
         if self.weight <= FGi32::ZERO {
             return Err("weight must be positive".into());
         }
-        if self.pushbox_radius <= FGi32::ZERO {
-            return Err("pushbox radius must be positive".into());
-        }
         Ok(())
     }
 

src/fighter/baked_animation/asset_baking.rs

@@ -27,7 +27,6 @@ struct FighterBakeSource {
     model_bytes: Vec<u8>,
     buffers: Vec<Vec<u8>>,
     animations: HashMap<AnimKind, String>,
-    root_motion_bone: String,
 }
 #[derive(Default, TypePath)]
 struct FighterBakeSourceLoader;
@@ -83,7 +82,6 @@ impl AssetLoader for FighterBakeSourceLoader {
             model_bytes,
             buffers,
             animations: manifest.animations,
-            root_motion_bone: manifest.root_motion_bone,
         })
     }
     fn extensions(&self) -> &[&str] {
@@ -125,12 +123,7 @@ impl AssetTransformer for FighterBakeTransformer {
         source: TransformedAsset<Self::AssetInput>,
         _: &'a Self::Settings,
     ) -> Result<TransformedAsset<Self::AssetOutput>, Self::Error> {
-        let baked = bake_gltf(
+        let baked = bake_gltf(&source.model_bytes, &source.buffers, &source.animations)?;
-            &source.model_bytes,
-            &source.buffers,
-            &source.animations,
-            &source.root_motion_bone,
-        )?;
         Ok(source.replace_asset(baked))
     }
 }
@@ -208,7 +201,6 @@ fn bake_gltf(
     bytes: &[u8],
     buffer_bytes: &[Vec<u8>],
     animations: &HashMap<AnimKind, String>,
-    root_motion_bone: &str,
 ) -> io::Result<BakedFighterAnimations> {
     let gltf = gltf::Gltf::from_slice(bytes)
         .map_err(|error| io::Error::new(io::ErrorKind::InvalidData, error))?;
@@ -236,14 +228,13 @@ fn bake_gltf(
             "glTF buffer data is incomplete",
         ));
     }
-    bake_gltf_document(gltf.document, buffers, animations, root_motion_bone)
+    bake_gltf_document(gltf.document, buffers, animations)
 }
 
 pub(super) fn bake_gltf_document(
     document: gltf::Document,
     buffers: Vec<gltf::buffer::Data>,
     animations: &HashMap<AnimKind, String>,
-    root_motion_bone: &str,
 ) -> io::Result<BakedFighterAnimations> {
     let nodes: Vec<_> = document.nodes().collect();
     if nodes.is_empty() {
@@ -269,15 +260,6 @@ pub(super) fn bake_gltf_document(
             })
         })
         .collect::<io::Result<Vec<_>>>()?;
-    let root_bone_index = names
-        .iter()
-        .position(|name| name == root_motion_bone)
-        .ok_or_else(|| {
-            io::Error::new(
-                io::ErrorKind::InvalidData,
-                format!("fighter model has no root-motion bone named {root_motion_bone}"),
-            )
-        })?;
     let mut pending = HashMap::<&str, Vec<AnimKind>>::new();
     for (kind, name) in animations {
         pending.entry(name).or_default().push(*kind);
@@ -304,28 +286,17 @@ pub(super) fn bake_gltf_document(
             .fold(0.0_f32, f32::max);
         let frame_count = baked_frame_count(duration, BAKED_ANIMATION_FPS);
         let mut frames = Vec::with_capacity(frame_count);
-        let mut root_positions = Vec::with_capacity(frame_count);
         for frame in 0..frame_count {
             let time = (frame as f32 / BAKED_ANIMATION_FPS as f32).min(duration);
-            let local = nodes
+            frames.push(
+                nodes
                     .iter()
                     .map(|node| local_transform(node.clone(), &channels, time))
-                .collect::<io::Result<Vec<_>>>()?;
+                    .collect::<io::Result<Vec<_>>>()?,
-            let mut model = vec![None; local.len()];
+            );
-            let root = super::runtime::resolve_model_transform(
-                root_bone_index,
-                &parents,
-                &local,
-                &mut model,
-            )?;
-            root_positions.push(root.get_translation());
-            frames.push(local);
         }
         let index = clips.len();
-        clips.push(BakedAnimationClip {
+        clips.push(BakedAnimationClip { frames });
-            frames,
-            root_positions,
-        });
         for kind in kinds {
             clip_indices.insert(kind, index);
         }
@@ -351,7 +322,6 @@ pub(super) fn bake_gltf_document(
         frame_rate: BAKED_ANIMATION_FPS,
         bone_names: names,
         parents,
-        root_bone_index,
         clips,
         clip_indices,
     })

src/fighter/baked_animation/mod.rs

@@ -36,13 +36,7 @@ mod tests {
         ))
         .unwrap();
         let (document, buffers) = test_gltf(&manifest.animations);
-        let baked = bake_gltf_document(
+        let baked = bake_gltf_document(document, buffers, &manifest.animations).unwrap();
-            document,
-            buffers,
-            &manifest.animations,
-            &manifest.root_motion_bone,
-        )
-        .unwrap();
 
         assert_eq!(baked.frame_rate, BAKED_ANIMATION_FPS);
         assert_eq!(baked.frame_count(AnimKind::Wait), Some(121));
@@ -57,15 +51,6 @@ mod tests {
             baked.bone_names.len()
         );
         assert_eq!(baked.parents.len(), baked.bone_names.len());
-        assert_eq!(baked.root_bone_index, 0);
-        assert_eq!(
-            baked.initial_root_position(AnimKind::Wait, FGi32::lit("2")),
-            Some(FGVec3::ZERO)
-        );
-        assert_eq!(
-            baked.root_motion_cycle_delta(AnimKind::Wait, FGi32::lit("2")),
-            Some(FGVec3::lit("2", "0", "0"))
-        );
     }
 
     /// Builds the smallest glTF document that still exercises the complete
@@ -177,14 +162,8 @@ mod tests {
             frame_rate: BAKED_ANIMATION_FPS,
             bone_names: vec!["root".into()],
             parents: vec![None],
-            root_bone_index: 0,
             clips: vec![BakedAnimationClip {
                 frames: vec![vec![first], vec![second], vec![terminal]],
-                root_positions: vec![
-                    FGVec3::ZERO,
-                    FGVec3::lit("2", "0", "0"),
-                    FGVec3::lit("4", "0", "0"),
-                ],
             }],
             clip_indices: HashMap::from([(AnimKind::Wait, 0)]),
         };
@@ -347,180 +326,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn root_motion_delta_is_scaled_and_zero_on_initial_sample() {
-        let names = ["root".into()];
-        let parents = [None];
-        let mut first = FixedMat4::IDENTITY;
-        first.translate(FGVec3::lit("1", "0", "0"));
-        let mut second = FixedMat4::IDENTITY;
-        second.translate(FGVec3::lit("3", "0", "0"));
-        let mut matrices = FighterBoneMatrices::default();
-        let frame = crate::fighter::animation::FighterAnimationFrame::new(AnimKind::Wait, false);
-
-        matrices.set_pose_with_frame(
-            frame,
-            Some(0),
-            Some(FGVec3::lit("2", "0", "0")),
-            FGVec3::ZERO,
-            None,
-            AnimKind::Wait,
-            &names,
-            &parents,
-            &[first],
-            FGi32::lit("2"),
-        );
-        assert_eq!(matrices.root_motion_delta(), FGVec3::ZERO);
-        assert_eq!(
-            matrices.root_motion_position(),
-            Some(FGVec3::lit("2", "0", "0"))
-        );
-
-        matrices.set_pose_with_frame(
-            crate::fighter::animation::FighterAnimationFrame { frame: 1, ..frame },
-            Some(0),
-            Some(FGVec3::lit("6", "0", "0")),
-            FGVec3::ZERO,
-            None,
-            AnimKind::Wait,
-            &names,
-            &parents,
-            &[second],
-            FGi32::lit("2"),
-        );
-        assert_eq!(matrices.root_motion_delta(), FGVec3::lit("4", "0", "0"));
-    }
-
-    #[test]
-    fn root_motion_translation_is_removed_from_published_pose() {
-        let names = ["root".into(), "hand".into()];
-        let parents = [None, Some(0)];
-        let mut root = FixedMat4::IDENTITY;
-        root.translate(FGVec3::lit("3", "4", "5"));
-        let mut hand = FixedMat4::IDENTITY;
-        hand.translate(FGVec3::lit("1", "2", "0"));
-        let mut matrices = FighterBoneMatrices::default();
-        let frame = crate::fighter::animation::FighterAnimationFrame::new(AnimKind::Wait, false);
-
-        matrices.set_pose_with_frame(
-            frame,
-            Some(0),
-            Some(FGVec3::lit("3", "4", "5")),
-            FGVec3::ZERO,
-            None,
-            AnimKind::Wait,
-            &names,
-            &parents,
-            &[root, hand],
-            FGi32::ONE,
-        );
-
-        assert_eq!(matrices.root_motion_delta(), FGVec3::ZERO);
-        assert_eq!(matrices.local(0).unwrap().get_translation(), FGVec3::ZERO);
-        assert_eq!(matrices.get_current("root").unwrap().get_translation(), FGVec3::ZERO);
-        assert_eq!(
-            matrices.get_current("hand").unwrap().get_translation(),
-            FGVec3::lit("1", "2", "0")
-        );
-    }
-
-    #[test]
-    fn every_animation_extracts_root_translation_and_retains_its_position() {
-        let names = ["root".into(), "hand".into()];
-        let parents = [None, Some(0)];
-        let mut root = FixedMat4::IDENTITY;
-        root.translate(FGVec3::lit("3", "4", "5"));
-        let mut hand = FixedMat4::IDENTITY;
-        hand.translate(FGVec3::lit("1", "2", "0"));
-        let mut matrices = FighterBoneMatrices::default();
-        let frame = crate::fighter::animation::FighterAnimationFrame::new(
-            AnimKind::LedgeWait,
-            true,
-        );
-
-        matrices.set_pose_with_frame(
-            frame,
-            Some(0),
-            Some(FGVec3::lit("3", "4", "5")),
-            FGVec3::ZERO,
-            None,
-            AnimKind::LedgeWait,
-            &names,
-            &parents,
-            &[root, hand],
-            FGi32::ONE,
-        );
-
-        assert_eq!(matrices.root_motion_delta(), FGVec3::ZERO);
-        assert_eq!(
-            matrices.root_motion_position(),
-            Some(FGVec3::lit("3", "4", "5"))
-        );
-        assert_eq!(matrices.local(0).unwrap().get_translation(), FGVec3::ZERO);
-        assert_eq!(
-            matrices.get_current("root").unwrap().get_translation(),
-            FGVec3::ZERO
-        );
-        assert_eq!(
-            matrices.get_current("hand").unwrap().get_translation(),
-            FGVec3::lit("1", "2", "0")
-        );
-
-        root.translate(FGVec3::lit("6", "4", "5"));
-        matrices.set_pose_with_frame(
-            crate::fighter::animation::FighterAnimationFrame { frame: 1, ..frame },
-            Some(0),
-            Some(FGVec3::lit("6", "4", "5")),
-            FGVec3::ZERO,
-            None,
-            AnimKind::LedgeWait,
-            &names,
-            &parents,
-            &[root, hand],
-            FGi32::ONE,
-        );
-        assert_eq!(matrices.root_motion_delta(), FGVec3::lit("3", "0", "0"));
-        assert_eq!(
-            matrices.get_current("root").unwrap().get_translation(),
-            FGVec3::ZERO
-        );
-    }
-
-    #[test]
-    fn repeating_root_motion_preserves_cycle_displacement_at_every_wrap() {
-        let names = ["root".into()];
-        let parents = [None];
-        let pose = |x| FixedMat4::IDENTITY.with_translation(FGVec3::lit(x, "0", "0"));
-        let mut matrices = FighterBoneMatrices::default();
-        let frame = |frame| crate::fighter::animation::FighterAnimationFrame {
-            kind: AnimKind::Wait,
-            frame,
-            repeat: true,
-        };
-
-        for (frame_number, x, expected_delta) in [
-            (0, "0", FGVec3::ZERO),
-            (1, "1", FGVec3::lit("1", "0", "0")),
-            (2, "0", FGVec3::lit("1", "0", "0")),
-            (3, "1", FGVec3::lit("1", "0", "0")),
-            (4, "0", FGVec3::lit("1", "0", "0")),
-        ] {
-            matrices.set_pose_with_frame(
-                frame(frame_number),
-                Some(0),
-                Some(FGVec3::lit(x, "0", "0")),
-                FGVec3::lit("2", "0", "0"),
-                Some(2),
-                AnimKind::Wait,
-                &names,
-                &parents,
-                &[pose(x)],
-                FGi32::ONE,
-            );
-            assert_eq!(matrices.root_motion_delta(), expected_delta);
-        }
-    }
-
     #[test]
     fn fixed_matrix_transforms_points() {
         let transform = FixedMat4 {

src/fighter/baked_animation/runtime.rs

@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 
 use bevy::prelude::*;
-use bevy_ggrs::Rollback;
 use serde::{Deserialize, Serialize};
 
 use super::BAKED_ANIMATION_FPS;
@@ -15,15 +14,11 @@ use crate::{
     },
     math::fixed_transform::FixedMat4,
     math::int::FGi32,
-    math::vec3::FGVec3,
 };
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct BakedAnimationClip {
     pub frames: Vec<Vec<FixedMat4>>,
-    /// Unscaled model-space position of the configured root-motion bone at
-    /// each baked frame.
-    pub root_positions: Vec<FGVec3>,
 }
 
 #[derive(Asset, bevy::reflect::TypePath, Clone, Debug, Serialize, Deserialize)]
@@ -32,22 +27,11 @@ pub struct BakedFighterAnimations {
     pub frame_rate: u32,
     pub bone_names: Vec<String>,
     pub parents: Vec<Option<usize>>,
-    pub(super) root_bone_index: usize,
     pub(super) clips: Vec<BakedAnimationClip>,
     pub(super) clip_indices: HashMap<AnimKind, usize>,
 }
 
 impl BakedFighterAnimations {
-    fn sample_index(&self, frame: &FighterAnimationFrame) -> Option<usize> {
-        let frames = &self.clip(frame.kind)?.frames;
-        let frame_index = if frame.repeat {
-            let loop_frame_count = frames.len().saturating_sub(1).max(1) as u32;
-            frame.frame % loop_frame_count
-        } else {
-            frame.frame
-        };
-        Some((frame_index as usize).min(frames.len().saturating_sub(1)))
-    }
     pub fn contains_bone(&self, bone: &str) -> bool {
         self.bone_names.iter().any(|name| name == bone)
     }
@@ -56,32 +40,21 @@ impl BakedFighterAnimations {
         self.bone_names.iter().all(|name| names.insert(name))
     }
     pub fn sample_pose(&self, frame: &FighterAnimationFrame) -> Option<&[FixedMat4]> {
-        let clip = self.clip(frame.kind)?;
+        let frames = &self.clip(frame.kind)?.frames;
-        clip.frames.get(self.sample_index(frame)?).map(Vec::as_slice)
+        let frame_index = if frame.repeat {
-    }
+            let loop_frame_count = frames.len().saturating_sub(1).max(1) as u32;
-    pub fn sample_root_position(
+            frame.frame % loop_frame_count
-        &self,
+        } else {
-        frame: &FighterAnimationFrame,
+            frame.frame
-        model_scale: FGi32,
+        };
-    ) -> Option<FGVec3> {
+        frames
-        let clip = self.clip(frame.kind)?;
+            .get(frame_index as usize)
-        let position = *clip.root_positions.get(self.sample_index(frame)?)?;
+            .or_else(|| frames.last())
-        Some(position * model_scale)
+            .map(Vec::as_slice)
-    }
-    pub fn initial_root_position(&self, kind: AnimKind, model_scale: FGi32) -> Option<FGVec3> {
-        self.sample_root_position(&FighterAnimationFrame::new(kind, false), model_scale)
     }
     pub fn frame_count(&self, kind: AnimKind) -> Option<u32> {
         self.clip(kind).map(|clip| clip.frames.len() as u32)
     }
-    pub fn root_motion_cycle_delta(
-        &self,
-        kind: AnimKind,
-        model_scale: FGi32,
-    ) -> Option<FGVec3> {
-        let clip = self.clip(kind)?;
-        Some((*clip.root_positions.last()? - *clip.root_positions.first()?) * model_scale)
-    }
     /// Samples one bone in model space without depending on the runtime's
     /// previous-frame buffers. Tooling uses this when the user scrubs between
     /// unrelated frames.
@@ -110,13 +83,9 @@ impl BakedFighterAnimations {
             .get(&kind)
             .and_then(|index| self.clips.get(*index))
     }
-    pub fn get_animation_duration(&self, kind: AnimKind) -> Option<usize> {
-        self.clip(kind).map(|clip| clip.frames.len())
-    }
 }
 
-#[derive(Component, Clone, Debug, Default, Hash)]
+#[derive(Component, Clone, Debug, Default)]
-#[require(Rollback)]
 pub struct FighterBoneMatrices {
     bone_names: Vec<String>,
     parents: Vec<Option<usize>>,
@@ -126,13 +95,6 @@ pub struct FighterBoneMatrices {
     previous_local_matrices: Vec<FixedMat4>,
     model_matrices: Vec<Option<FixedMat4>>,
     presentation_kind: Option<AnimKind>,
-    previous_animation_frame: Option<FighterAnimationFrame>,
-    root_motion_position: Option<FGVec3>,
-    /// The raw, scaled model-space root translation used as the baseline for
-    /// root-motion extraction.  This is kept separately because the published
-    /// pose has the root translation removed.
-    previous_root_motion_translation: Option<FGVec3>,
-    root_motion_delta: crate::math::vec3::FGVec3,
 }
 
 #[derive(Component, Clone, Debug, Default)]
@@ -149,12 +111,7 @@ impl FighterBoneMatrices {
         let Some(pose) = baked.sample_pose(frame) else {
             return false;
         };
-        self.set_pose_with_frame(
+        self.set_pose(
-            *frame,
-            Some(baked.root_bone_index),
-            baked.sample_root_position(frame, model_scale),
-            FGVec3::ZERO,
-            None,
             frame.kind,
             &baked.bone_names,
             &baked.parents,
@@ -201,16 +158,6 @@ impl FighterBoneMatrices {
     pub fn get_current_index(&self, index: usize) -> Option<FixedMat4> {
         self.matrices.get(index).copied()
     }
-    /// Translation of the configured root-motion bone since the previous
-    /// simulation animation frame, in scaled model-space units.
-    pub fn root_motion_delta(&self) -> FGVec3 {
-        self.root_motion_delta
-    }
-    /// Current raw, scaled model-space position of the configured root-motion
-    /// bone. The published skeleton has this translation removed.
-    pub fn root_motion_position(&self) -> Option<FGVec3> {
-        self.root_motion_position
-    }
     pub fn iter(&self) -> impl Iterator<Item = (&str, FixedMat4)> {
         self.bone_names
             .iter()
@@ -233,7 +180,6 @@ impl FighterBoneMatrices {
             .unwrap_or(current);
         Some(interpolate_transform(previous, current, overstep_fraction))
     }
-    #[cfg(test)]
     pub(super) fn set_pose(
         &mut self,
         kind: AnimKind,
@@ -242,47 +188,8 @@ impl FighterBoneMatrices {
         local: &[FixedMat4],
         model_scale: FGi32,
     ) {
-        self.set_pose_with_frame(
+        self.sample_pose(kind, bone_names, parents, local, model_scale, true);
-            FighterAnimationFrame::new(kind, false),
-            None,
-            None,
-            FGVec3::ZERO,
-            None,
-            kind,
-            bone_names,
-            parents,
-            local,
-            model_scale,
-        );
     }
-    pub(super) fn set_pose_with_frame(
-        &mut self,
-        animation_frame: FighterAnimationFrame,
-        root_bone_index: Option<usize>,
-        root_motion_position: Option<FGVec3>,
-        root_motion_cycle_delta: FGVec3,
-        root_motion_loop_frame_count: Option<u32>,
-        kind: AnimKind,
-        bone_names: &[String],
-        parents: &[Option<usize>],
-        local: &[FixedMat4],
-        model_scale: FGi32,
-    ) {
-        self.sample_pose(
-            animation_frame,
-            root_bone_index,
-            root_motion_position,
-            root_motion_cycle_delta,
-            root_motion_loop_frame_count,
-            kind,
-            bone_names,
-            parents,
-            local,
-            model_scale,
-            true,
-        );
-    }
-    #[cfg(test)]
     pub(super) fn resample_pose(
         &mut self,
         kind: AnimKind,
@@ -291,53 +198,10 @@ impl FighterBoneMatrices {
         local: &[FixedMat4],
         model_scale: FGi32,
     ) {
-        self.resample_pose_with_frame(
+        self.sample_pose(kind, bone_names, parents, local, model_scale, false);
-            FighterAnimationFrame::new(kind, false),
-            None,
-            None,
-            FGVec3::ZERO,
-            None,
-            kind,
-            bone_names,
-            parents,
-            local,
-            model_scale,
-        );
-    }
-    pub(super) fn resample_pose_with_frame(
-        &mut self,
-        animation_frame: FighterAnimationFrame,
-        root_bone_index: Option<usize>,
-        root_motion_position: Option<FGVec3>,
-        _root_motion_cycle_delta: FGVec3,
-        _root_motion_loop_frame_count: Option<u32>,
-        kind: AnimKind,
-        bone_names: &[String],
-        parents: &[Option<usize>],
-        local: &[FixedMat4],
-        model_scale: FGi32,
-    ) {
-        self.sample_pose(
-            animation_frame,
-            root_bone_index,
-            root_motion_position,
-            FGVec3::ZERO,
-            None,
-            kind,
-            bone_names,
-            parents,
-            local,
-            model_scale,
-            false,
-        );
     }
     fn sample_pose(
         &mut self,
-        animation_frame: FighterAnimationFrame,
-        root_index: Option<usize>,
-        raw_root_motion_translation: Option<FGVec3>,
-        root_motion_cycle_delta: FGVec3,
-        root_motion_loop_frame_count: Option<u32>,
         kind: AnimKind,
         bone_names: &[String],
         parents: &[Option<usize>],
@@ -355,7 +219,6 @@ impl FighterBoneMatrices {
             parents.len(),
             "baked bone parents do not match names"
         );
-        let animation_changed = self.presentation_kind != Some(kind);
         if self.bone_names.is_empty() {
             self.bone_names.extend_from_slice(bone_names);
             self.parents.extend_from_slice(parents);
@@ -372,9 +235,15 @@ impl FighterBoneMatrices {
             std::mem::swap(&mut self.matrices, &mut self.previous_frame_matrices);
             std::mem::swap(&mut self.local_matrices, &mut self.previous_local_matrices);
         }
+        let animation_changed = self.presentation_kind != Some(kind);
         self.local_matrices.clear();
         self.local_matrices.extend_from_slice(local);
-
+        self.model_matrices.resize(local.len(), None);
+        self.model_matrices.fill(None);
+        for index in 0..local.len() {
+            resolve_model_transform(index, parents, local, &mut self.model_matrices)
+                .expect("baked bone hierarchy should be valid");
+        }
         let model_scale = FixedMat4 {
             cols: [
                 [model_scale, FGi32::ZERO, FGi32::ZERO, FGi32::ZERO],
@@ -383,52 +252,12 @@ impl FighterBoneMatrices {
                 [FGi32::ZERO, FGi32::ZERO, FGi32::ZERO, FGi32::ONE],
             ],
         };
-        // Gameplay always owns root displacement. Keep rotation and scale in
-        // the pose while removing the configured root bone's translation.
-        if let Some(root_index) = root_index {
-            self.local_matrices[root_index].translate(FGVec3::ZERO);
-        }
-        self.model_matrices.resize(local.len(), None);
-        self.model_matrices.fill(None);
-        for index in 0..local.len() {
-            resolve_model_transform(index, parents, &self.local_matrices, &mut self.model_matrices)
-                .expect("baked bone hierarchy should be valid");
-        }
         self.matrices.clear();
         self.matrices.extend(
             self.model_matrices.iter().map(|matrix| {
                 model_scale.mul(matrix.expect("baked bone hierarchy should be valid"))
             }),
         );
-        self.root_motion_delta = if advance_history
-            && !animation_changed
-            && self.previous_animation_frame.is_some()
-            && let (Some(current), Some(previous)) = (
-                raw_root_motion_translation,
-                self.previous_root_motion_translation,
-            )
-        {
-            let mut delta = current - previous;
-            if animation_frame.repeat
-                && self.previous_animation_frame.is_some_and(|previous| {
-                    previous.kind == animation_frame.kind
-                        && previous.frame.saturating_add(1) == animation_frame.frame
-                })
-                && root_motion_loop_frame_count.is_some_and(|loop_frame_count| {
-                    loop_frame_count > 0 && animation_frame.frame % loop_frame_count == 0
-                })
-            {
-                delta = delta + root_motion_cycle_delta;
-            }
-            delta
-        } else {
-            FGVec3::ZERO
-        };
-        self.root_motion_position = raw_root_motion_translation;
-        self.previous_root_motion_translation = raw_root_motion_translation;
-        if advance_history {
-            self.previous_animation_frame = Some(animation_frame);
-        }
         // A state transition is a discontinuity, not an animation frame to
         // interpolate from the previous clip.  Keep the presentation pose at
         // the new clip's first/current frame immediately.
@@ -515,20 +344,8 @@ fn sample_fighter_bone_matrices(
     let manifest = manifests
         .get(&fighter.manifest)
         .expect("fighter manifest should be loaded before the match starts");
-    let root_motion_position = baked.sample_root_position(frame, manifest.model_scale);
-    let root_motion_cycle_delta = baked
-        .root_motion_cycle_delta(frame.kind, manifest.model_scale)
-        .unwrap_or(FGVec3::ZERO);
-    let root_motion_loop_frame_count = baked
-        .frame_count(frame.kind)
-        .map(|count| count.saturating_sub(1).max(1));
     if advance_history {
-        matrices.set_pose_with_frame(
+        matrices.set_pose(
-            *frame,
-            Some(baked.root_bone_index),
-            root_motion_position,
-            root_motion_cycle_delta,
-            root_motion_loop_frame_count,
             frame.kind,
             &baked.bone_names,
             &baked.parents,
@@ -536,12 +353,7 @@ fn sample_fighter_bone_matrices(
             manifest.model_scale,
         );
     } else {
-        matrices.resample_pose_with_frame(
+        matrices.resample_pose(
-            *frame,
-            Some(baked.root_bone_index),
-            root_motion_position,
-            FGVec3::ZERO,
-            None,
             frame.kind,
             &baked.bone_names,
             &baked.parents,
@@ -560,7 +372,7 @@ fn sample_fighter_bone_matrices(
     }
 }
 
-pub(super) fn resolve_model_transform(
+fn resolve_model_transform(
     index: usize,
     parents: &[Option<usize>],
     local: &[FixedMat4],

src/fighter/collision.rs

@@ -1,17 +1,10 @@
 //! Resolving an integrated fighter position against the stage.
 
-use crate::fighter::ecb::{self as ecb_module, FighterDesiredECB};
+use crate::fighter::ecb::FighterPreviousECB;
-use crate::fighter::{FighterPreviousTranslation, FighterTranslation};
+use crate::fighter::{FighterECB, FighterPreviousTranslation, FighterTranslation};
-use crate::fighter::FighterVelocity;
-#[cfg(test)]
-use crate::fighter::{FighterECB, ecb::FighterPreviousECB};
-use crate::math::int::FGi32;
-use crate::math::rect::FGRect;
 use crate::math::segment::FGSegment2d;
 use crate::math::vec::FGVec2;
-use crate::stage::line::{
+use crate::stage::line::{StageCollision, StageLineID, StagePolyType};
-    StageCollision, StageLineID, StagePolyLineSegmentType, StagePolyType, StageVertexID,
-};
 /*
 pub fn collide_fighter_with_scene(
     fighters: Query<(&FighterECB, &mut FighterVelocity, &mut FighterTranslation)>,
@@ -42,411 +35,54 @@ pub fn collide_fighter_with_scene(
 pub struct AirCollisionWithStageResult {
     pub line_id: StageLineID,
     pub hit_position: FGVec2,
-    /// Fighter origin at the collision substep. The ECB remains local to this
-    /// origin; callers must not rebase the ECB by the frame-sized movement.
-    pub resolved_translation: FGVec2,
     pub hit_normal: FGVec2,
 }
 
-#[derive(Clone, Copy, Debug, Default)]
+pub fn air_collide_with_stage(
-pub struct AirCollisionOptions {
-    /// Allow downward input to disable collision with pass-through platforms.
-    pub can_pass_through_soft_platforms: bool,
-    /// Treat an upward crossing of a pass-through platform by the ECB bottom as a landing.
-    pub land_on_soft_platforms_from_below: bool,
-}
-
-#[cfg(test)]
-fn air_collide_with_stage(
     prev_translation: &FighterPreviousTranslation,
     translation: &FighterTranslation,
     prev_ecb: &FighterPreviousECB,
     ecb: &FighterECB,
     stage_collision: &StageCollision,
     ignored_polys: &[usize],
-    options: AirCollisionOptions,
+    can_ignore_soft_platforms: bool,
 ) -> Option<AirCollisionWithStageResult> {
-    let mut translation = *translation;
+    let ray_segment = FGSegment2d::new(
-    let mut velocity = FighterVelocity::default();
+        prev_translation.0 + prev_ecb.get_bottom_point(),
-    air_collide_with_stage_substepped(
+        translation.0 + ecb.get_bottom_point(),
-        prev_translation,
+    );
-        &mut translation,
-        &mut velocity,
-        &mut ecb_module::FighterECB {
-            top: prev_ecb.top,
-            bottom: prev_ecb.bottom,
-            left: prev_ecb.left,
-            right: prev_ecb.right,
-        },
-        &FighterDesiredECB::from(*ecb),
-        stage_collision,
-        ignored_polys,
-        options,
-    )
-}
 
-/// Sweeps movement and ECB shape changes together.
-pub(crate) fn collision_step_count(max_change: FGi32) -> u32 {
-    let six = FGi32::lit("6.0");
-    if max_change <= six {
-        return 1;
-    }
-
-    let mut quotient = 0;
-    let mut remainder = max_change;
-    while remainder >= six {
-        quotient += 1;
-        remainder -= six;
-    }
-    quotient + 1
-}
-
-pub fn air_collide_with_stage_substepped(
-    prev_translation: &FighterPreviousTranslation,
-    translation: &mut FighterTranslation,
-    velocity: &mut FighterVelocity,
-    ecb: &mut crate::fighter::FighterECB,
-    desired: &FighterDesiredECB,
-    stage_collision: &StageCollision,
-    ignored_polys: &[usize],
-    options: AirCollisionOptions,
-) -> Option<AirCollisionWithStageResult> {
-    let requested_translation = translation.0;
-    let movement = requested_translation - prev_translation.0;
-    let mut largest_change = movement.x.abs().max(movement.y.abs());
-    largest_change = largest_change.max(ecb_module::ecb_max_delta(ecb, desired));
-    let steps = collision_step_count(largest_change);
-
-    let step_count = FGi32::from_num(steps);
-    let movement_per_step = movement / step_count;
-    let mut current_position = prev_translation.0;
-    let mut current_ecb = *ecb;
-    let mut collision_offset = FGVec2::ZERO;
-
-    for step in 0..steps {
-        let previous_position = current_position;
-        let previous_ecb = current_ecb;
-        let remaining_steps = FGi32::from_num(steps - step);
-        ecb_module::interpolate_ecb(&mut current_ecb, *desired, FGi32::ONE / remaining_steps);
-        current_position = if step + 1 == steps {
-            // Fixed-point division may truncate. Always make the final
-            // substep land exactly on the requested frame endpoint.
-            requested_translation + collision_offset
-        } else {
-            prev_translation.0
-                + movement_per_step * FGi32::from_num(step + 1)
-                + collision_offset
-        };
-
-        let lower_edges = [
-            (
-                previous_ecb.bottom,
-                previous_ecb.left,
-                current_ecb.bottom,
-                current_ecb.left,
-            ),
-            (
-                previous_ecb.bottom,
-                previous_ecb.right,
-                current_ecb.bottom,
-                current_ecb.right,
-            ),
-        ];
-        if let Some(result) = sweep_edges(
-            stage_collision,
-            previous_position,
-            current_position,
-            &lower_edges,
-            StagePolyLineSegmentType::Floor,
-            ignored_polys,
-            options.can_pass_through_soft_platforms,
-        ) {
-            *ecb = current_ecb;
-            translation.0 = current_position + result.correction;
-            velocity.0 -= velocity.0.project_onto_normalized(result.hit_normal);
-            let bottom_contact = translation.0 + current_ecb.bottom;
-            return Some(AirCollisionWithStageResult {
-                line_id: result.line_id,
-                hit_position: bottom_contact,
-                resolved_translation: translation.0,
-                hit_normal: result.hit_normal,
-            });
-        }
-
-        let upper_edges = [
-            (
-                previous_ecb.top,
-                previous_ecb.left,
-                current_ecb.top,
-                current_ecb.left,
-            ),
-            (
-                previous_ecb.top,
-                previous_ecb.right,
-                current_ecb.top,
-                current_ecb.right,
-            ),
-        ];
-        if let Some(contact) = sweep_edges(
-            stage_collision,
-            previous_position,
-            current_position,
-            &upper_edges,
-            StagePolyLineSegmentType::Ceiling,
-            ignored_polys,
-            true,
-        ) {
-            current_position += contact.correction;
-            collision_offset += contact.correction;
-            velocity.0 -= velocity.0.project_onto_normalized(contact.hit_normal);
-        }
-
-        if options.land_on_soft_platforms_from_below
-            && let Some(result) = sweep_bottom_point_through_platforms(
-                stage_collision,
-                previous_position + previous_ecb.bottom,
-                current_position + current_ecb.bottom,
-                ignored_polys,
-            )
-        {
-            *ecb = current_ecb;
-            translation.0 = current_position + result.correction;
-            velocity.0 -= velocity.0.project_onto_normalized(result.hit_normal);
-            let bottom_contact = translation.0 + current_ecb.bottom;
-            return Some(AirCollisionWithStageResult {
-                line_id: result.line_id,
-                hit_position: bottom_contact,
-                resolved_translation: translation.0,
-                hit_normal: result.hit_normal,
-            });
-        }
-
-        let side_edges = [
-            (
-                previous_ecb.bottom,
-                previous_ecb.right,
-                current_ecb.bottom,
-                current_ecb.right,
-            ),
-            (
-                previous_ecb.right,
-                previous_ecb.top,
-                current_ecb.right,
-                current_ecb.top,
-            ),
-            (
-                previous_ecb.top,
-                previous_ecb.left,
-                current_ecb.top,
-                current_ecb.left,
-            ),
-            (
-                previous_ecb.left,
-                previous_ecb.bottom,
-                current_ecb.left,
-                current_ecb.bottom,
-            ),
-        ];
-        if let Some(contact) = sweep_edges(
-            stage_collision,
-            previous_position,
-            current_position,
-            &side_edges,
-            StagePolyLineSegmentType::Wall,
-            ignored_polys,
-            true,
-        ) {
-            current_position += contact.correction;
-            collision_offset += contact.correction;
-            velocity.0 -= velocity.0.project_onto_normalized(contact.hit_normal);
-        }
-    }
-
-    *ecb = current_ecb;
-    translation.0 = current_position;
-    None
-}
-
-struct PointSweepResult {
-    line_id: StageLineID,
-    hit_normal: FGVec2,
-    correction: FGVec2,
-}
-
-fn sweep_bottom_point_through_platforms(
-    stage_collision: &StageCollision,
-    previous_bottom: FGVec2,
-    current_bottom: FGVec2,
-    ignored_polys: &[usize],
-) -> Option<PointSweepResult> {
-    let bottom_sweep = FGSegment2d::new(previous_bottom, current_bottom);
-
-    stage_collision
-        .stage_polys
-        .iter()
-        .enumerate()
-        .filter(|(poly_idx, poly)| {
-            !ignored_polys.contains(poly_idx) && matches!(poly.poly_type, StagePolyType::Platform)
-        })
-        .flat_map(|(poly_idx, poly)| {
-            poly.segments
-                .iter()
-                .enumerate()
-                .filter(|(_, segment)| {
-                    matches!(segment.segment_type, StagePolyLineSegmentType::Floor)
-                })
-                .filter_map(move |(segment_idx, segment)| {
-                    let previous_distance = segment
-                        .normal
-                        .dot(previous_bottom - segment.segment.point1());
-                    let current_distance = segment
-                        .normal
-                        .dot(current_bottom - segment.segment.point1());
-                    if previous_distance >= crate::math::int::FGWide::ZERO
-                        || current_distance < crate::math::int::FGWide::ZERO
-                    {
-                        return None;
-                    }
-
-                    let hit_position = segment.segment.segment_intersection(&bottom_sweep)?;
-                    Some((
-                        PointSweepResult {
-                            line_id: StageLineID {
-                                polygon: poly_idx,
-                                segment: segment_idx,
-                            },
-                            hit_normal: segment.normal,
-                            correction: hit_position - current_bottom,
-                        },
-                        hit_position.distance_squared(previous_bottom),
-                    ))
-                })
-        })
-        .min_by_key(|(_, distance)| *distance)
-        .map(|(result, _)| result)
-}
-
-fn sweep_edges(
-    stage_collision: &StageCollision,
-    previous_position: FGVec2,
-    current_position: FGVec2,
-    edges: &[(FGVec2, FGVec2, FGVec2, FGVec2)],
-    segment_type: StagePolyLineSegmentType,
-    ignored_polys: &[usize],
-    ignore_platforms: bool,
-) -> Option<PointSweepResult> {
     stage_collision
         .stage_polys
         .iter()
         .enumerate()
         .filter(|(poly_idx, poly)| {
             !ignored_polys.contains(poly_idx)
-                && !(ignore_platforms && matches!(poly.poly_type, StagePolyType::Platform))
+                && !(can_ignore_soft_platforms && matches!(poly.poly_type, StagePolyType::Platform))
         })
-        .flat_map(|(poly_idx, poly)| {
+        .filter_map(|(poly_idx, poly)| {
-            poly.segments
+            poly.intersect_ray(ray_segment).map(|intersect_result| {
-                .iter()
-                .enumerate()
-                .filter(move |(_, segment)| segment.segment_type == segment_type)
-                .filter_map(move |(segment_idx, segment)| {
-                    edges
-                        .iter()
-                        .filter_map(|(previous_a, previous_b, current_a, current_b)| {
-                            let previous_a = previous_position + *previous_a;
-                            let previous_b = previous_position + *previous_b;
-                            let current_a = current_position + *current_a;
-                            let current_b = current_position + *current_b;
-                            let previous_min = segment
-                                .normal
-                                .dot(previous_a - segment.segment.point1())
-                                .min(segment.normal.dot(previous_b - segment.segment.point1()));
-                            let current_a_distance =
-                                segment.normal.dot(current_a - segment.segment.point1());
-                            let current_b_distance =
-                                segment.normal.dot(current_b - segment.segment.point1());
-                            let current_min = current_a_distance.min(current_b_distance);
-                            if previous_min < crate::math::int::FGWide::ZERO
-                                || current_min > crate::math::int::FGWide::ZERO
-                            {
-                                return None;
-                            }
-
-                            let boundary = [
-                                FGSegment2d::new(previous_a, previous_b),
-                                FGSegment2d::new(previous_a, current_a),
-                                FGSegment2d::new(previous_b, current_b),
-                                FGSegment2d::new(current_a, current_b),
-                            ];
-                            let quad = [previous_a, previous_b, current_b, current_a];
-                            let position = boundary
-                                .iter()
-                                .filter_map(|edge| segment.segment.segment_intersection(edge))
-                                .max_by_key(|position| position.distance_squared(current_a))
-                                .or_else(|| {
-                                    [segment.segment.point1(), segment.segment.point2()]
-                                        .into_iter()
-                                        .find(|point| point_in_convex_quad(*point, quad))
-                                })?;
-                            let penetration = FGi32::from_num(-current_min);
-                            Some((position, segment.normal * penetration))
-                        })
-                        .max_by_key(|(position, _)| {
-                            position.distance_squared(segment.segment.point1())
-                        })
-                        .map(|(position, correction)| {
                 (
-                                PointSweepResult {
+                    AirCollisionWithStageResult {
-                                    line_id: StageLineID {
+                        line_id: {
+                            StageLineID {
                                 polygon: poly_idx,
-                                        segment: segment_idx,
+                                segment: intersect_result.segment_idx,
+                            }
                         },
-                                    hit_normal: segment.normal,
+                        hit_position: intersect_result.position,
-                                    correction,
+                        hit_normal: intersect_result.normal,
                     },
-                                position.distance_squared(segment.segment.point2()),
+                    intersect_result
+                        .position
+                        .distance_squared(ray_segment.point2()),
                 )
             })
         })
-        })
         .max_by(|(_, a), (_, b)| a.cmp(b))
         .map(|(result, _)| result)
 }
 
-fn point_in_convex_quad(point: FGVec2, quad: [FGVec2; 4]) -> bool {
-    let mut has_positive = false;
-    let mut has_negative = false;
-    for (a, b) in quad.into_iter().zip(quad.into_iter().cycle().skip(1)).take(4) {
-        let edge = b - a;
-        let offset = point - a;
-        let cross = crate::math::int::FGWide::from_num(edge.x)
-            * crate::math::int::FGWide::from_num(offset.y)
-            - crate::math::int::FGWide::from_num(edge.y)
-                * crate::math::int::FGWide::from_num(offset.x);
-        has_positive |= cross > crate::math::int::FGWide::ZERO;
-        has_negative |= cross < crate::math::int::FGWide::ZERO;
-        if has_positive && has_negative {
-            return false;
-        }
-    }
-    true
-}
-
-#[derive(Clone)]
-pub struct AirCollisionWithLedgeResult {
-    pub ledge: StageVertexID,
-}
-
-pub fn air_collide_with_ledges(
-    ledge_box: &FGRect,
-    stage_collision: &StageCollision,
-) -> Option<AirCollisionWithLedgeResult> {
-    stage_collision
-        .intersect_ledges(ledge_box)
-        .map(|result| AirCollisionWithLedgeResult {
-            ledge: result.vertex_id,
-        })
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -475,178 +111,10 @@ mod tests {
         )
     }
 
-    fn single_segment(
-        start: FGVec2,
-        end: FGVec2,
-        segment_type: StagePolyLineSegmentType,
-    ) -> StagePoly {
-        let segment = FGSegment2d::new(start, end);
-        StagePoly {
-            poly_type: StagePolyType::Closed,
-            segments: vec![crate::stage::line::StagePolyLineSegment {
-                segment,
-                normal: segment.left_normal(),
-                segment_type,
-            }],
-        }
-    }
-
-    #[test]
-    fn melee_step_count_adds_one_step_after_each_six_unit_block() {
-        assert_eq!(collision_step_count(FGi32::lit("6")), 1);
-        assert_eq!(collision_step_count(FGi32::lit("6.01")), 2);
-        assert_eq!(collision_step_count(FGi32::lit("12")), 3);
-        assert_eq!(collision_step_count(FGi32::lit("18")), 4);
-    }
-
-    #[test]
-    fn collision_result_keeps_ecb_local_to_resolved_origin() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![horizontal_platform("0")],
-            ..StageCollision::default()
-        };
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
-        let mut translation = FighterTranslation(FGVec2::lit("0", "-1"));
-        let mut velocity = FighterVelocity(FGVec2::lit("0", "-3"));
-        let mut ecb = FighterECB {
-            top: FGVec2::lit("0", "2"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-1", "0.5"),
-            right: FGVec2::lit("1", "0.5"),
-        };
-        let desired = FighterDesiredECB::from(ecb);
-        let collision = air_collide_with_stage_substepped(
-            &previous_translation,
-            &mut translation,
-            &mut velocity,
-            &mut ecb,
-            &desired,
-            &stage_collision,
-            &[],
-            Default::default(),
-        )
-        .expect("the floor should be hit");
-
-        assert_eq!(
-            collision.resolved_translation + ecb.bottom,
-            collision.hit_position
-        );
-        assert_eq!(velocity.0.y, FGi32::ZERO);
-    }
-
-    #[test]
-    fn airborne_side_point_resolves_wall_and_projects_velocity() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![single_segment(
-                FGVec2::lit("2", "2"),
-                FGVec2::lit("2", "-2"),
-                StagePolyLineSegmentType::Wall,
-            )],
-            ..StageCollision::default()
-        };
-        let previous = FighterPreviousTranslation(FGVec2::lit("4", "0"));
-        let mut translation = FighterTranslation(FGVec2::lit("0", "0"));
-        let mut velocity = FighterVelocity(FGVec2::lit("-4", "0"));
-        let mut ecb = FighterECB {
-            top: FGVec2::lit("0", "1"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-1", "0"),
-            right: FGVec2::lit("1", "0"),
-        };
-        let desired = FighterDesiredECB::from(ecb);
-
-        assert!(air_collide_with_stage_substepped(
-            &previous,
-            &mut translation,
-            &mut velocity,
-            &mut ecb,
-            &desired,
-            &stage_collision,
-            &[],
-            Default::default(),
-        )
-        .is_none());
-        assert_eq!(translation.0, FGVec2::lit("3", "0"));
-        assert_eq!(velocity.0.x, FGi32::ZERO);
-    }
-
-    #[test]
-    fn stage_corner_cannot_pass_through_middle_of_diamond_edge() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![single_segment(
-                FGVec2::lit("2", "0.6"),
-                FGVec2::lit("2", "0.4"),
-                StagePolyLineSegmentType::Wall,
-            )],
-            ..StageCollision::default()
-        };
-        let previous = FighterPreviousTranslation(FGVec2::lit("4", "0"));
-        let mut translation = FighterTranslation(FGVec2::ZERO);
-        let mut velocity = FighterVelocity(FGVec2::lit("-4", "0"));
-        let mut ecb = FighterECB {
-            top: FGVec2::lit("0", "1"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-1", "0"),
-            right: FGVec2::lit("1", "0"),
-        };
-        let desired = FighterDesiredECB::from(ecb);
-
-        assert!(air_collide_with_stage_substepped(
-            &previous,
-            &mut translation,
-            &mut velocity,
-            &mut ecb,
-            &desired,
-            &stage_collision,
-            &[],
-            Default::default(),
-        )
-        .is_none());
-        assert_eq!(translation.0.x, FGi32::lit("3"));
-        assert_eq!(velocity.0.x, FGi32::ZERO);
-    }
-
-    #[test]
-    fn airborne_top_point_resolves_ceiling_and_projects_velocity() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![single_segment(
-                FGVec2::lit("2", "2"),
-                FGVec2::lit("-2", "2"),
-                StagePolyLineSegmentType::Ceiling,
-            )],
-            ..StageCollision::default()
-        };
-        let previous = FighterPreviousTranslation(FGVec2::ZERO);
-        let mut translation = FighterTranslation(FGVec2::lit("0", "4"));
-        let mut velocity = FighterVelocity(FGVec2::lit("0", "4"));
-        let mut ecb = FighterECB {
-            top: FGVec2::lit("0", "1"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-1", "0"),
-            right: FGVec2::lit("1", "0"),
-        };
-        let desired = FighterDesiredECB::from(ecb);
-
-        assert!(air_collide_with_stage_substepped(
-            &previous,
-            &mut translation,
-            &mut velocity,
-            &mut ecb,
-            &desired,
-            &stage_collision,
-            &[],
-            Default::default(),
-        )
-        .is_none());
-        assert_eq!(translation.0, FGVec2::lit("0", "1"));
-        assert_eq!(velocity.0.y, FGi32::ZERO);
-    }
-
     #[test]
     fn airborne_collision_skips_ignored_polygons() {
         let stage_collision = StageCollision {
             stage_polys: vec![horizontal_platform("0"), horizontal_platform("1")],
-            ..StageCollision::default()
         };
         let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
         let translation = FighterTranslation(FGVec2::lit("0", "-1"));
@@ -670,7 +138,7 @@ mod tests {
             &ecb,
             &stage_collision,
             &[1],
-            Default::default(),
+            false,
         )
         .expect("the non-ignored platform should still be collidable");
 
@@ -682,7 +150,6 @@ mod tests {
     fn airborne_collision_skips_soft_platforms_while_passing_down() {
         let stage_collision = StageCollision {
             stage_polys: vec![horizontal_platform("0")],
-            ..StageCollision::default()
         };
         let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
         let translation = FighterTranslation(FGVec2::lit("0", "-1"));
@@ -699,21 +166,16 @@ mod tests {
             right: FGVec2::ZERO,
         };
 
-        assert!(
+        assert!(air_collide_with_stage(
-            air_collide_with_stage(
             &previous_translation,
             &translation,
             &previous_ecb,
             &ecb,
             &stage_collision,
             &[],
-                AirCollisionOptions {
+            true,
-                    can_pass_through_soft_platforms: true,
-                    ..Default::default()
-                },
         )
-            .is_none()
+        .is_none());
-        );
 
         assert_eq!(
             air_collide_with_stage(
@@ -723,7 +185,7 @@ mod tests {
                 &ecb,
                 &stage_collision,
                 &[],
-                Default::default(),
+                false,
             )
             .expect("air dodges still collide with soft platforms")
             .hit_position,
@@ -735,7 +197,6 @@ mod tests {
     fn airborne_collision_still_hits_solid_floors_while_passing_down() {
         let stage_collision = StageCollision {
             stage_polys: vec![solid_floor()],
-            ..StageCollision::default()
         };
         let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
         let translation = FighterTranslation(FGVec2::lit("0", "-1"));
@@ -759,131 +220,11 @@ mod tests {
             &ecb,
             &stage_collision,
             &[],
-            AirCollisionOptions {
+            true,
-                can_pass_through_soft_platforms: true,
-                ..Default::default()
-            },
         )
         .expect("solid floors remain collidable while passing down");
 
         assert_eq!(collision.line_id.polygon, 0);
         assert_eq!(collision.hit_position, FGVec2::lit("0", "0"));
     }
-
-    #[test]
-    fn upward_bottom_crossing_can_land_on_soft_platform() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![horizontal_platform("0")],
-            ..Default::default()
-        };
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "-1"));
-        let mut translation = FighterTranslation(FGVec2::lit("0", "1"));
-        let mut velocity = FighterVelocity(FGVec2::lit("0", "2"));
-        let mut ecb = FighterECB::default();
-        let desired = FighterDesiredECB::from(ecb);
-
-        let collision = air_collide_with_stage_substepped(
-            &previous_translation,
-            &mut translation,
-            &mut velocity,
-            &mut ecb,
-            &desired,
-            &stage_collision,
-            &[],
-            AirCollisionOptions {
-                land_on_soft_platforms_from_below: true,
-                ..Default::default()
-            },
-        )
-        .expect("the upward bottom-point crossing should land on the platform");
-
-        assert_eq!(collision.hit_position, FGVec2::ZERO);
-        assert_eq!(collision.line_id, StageLineID { polygon: 0, segment: 0 });
-        assert_eq!(translation.0, FGVec2::ZERO);
-        assert_eq!(velocity.y, FGi32::ZERO);
-    }
-
-    #[test]
-    fn upward_platform_landing_requires_crossing_and_opt_in() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![horizontal_platform("0")],
-            ..Default::default()
-        };
-        let previous_ecb = FighterPreviousECB::default();
-        let ecb = FighterECB::default();
-        let options = AirCollisionOptions {
-            land_on_soft_platforms_from_below: true,
-            ..Default::default()
-        };
-
-        assert!(
-            air_collide_with_stage(
-                &FighterPreviousTranslation(FGVec2::lit("0", "-2")),
-                &FighterTranslation(FGVec2::lit("0", "-1")),
-                &previous_ecb,
-                &ecb,
-                &stage_collision,
-                &[],
-                options,
-            )
-            .is_none()
-        );
-        assert!(
-            air_collide_with_stage(
-                &FighterPreviousTranslation(FGVec2::lit("0", "-1")),
-                &FighterTranslation(FGVec2::lit("0", "1")),
-                &previous_ecb,
-                &ecb,
-                &stage_collision,
-                &[],
-                Default::default(),
-            )
-            .is_none()
-        );
-    }
-
-    #[test]
-    fn upward_crossing_does_not_land_on_solid_or_ignored_platforms() {
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "-1"));
-        let translation = FighterTranslation(FGVec2::lit("0", "1"));
-        let previous_ecb = FighterPreviousECB::default();
-        let ecb = FighterECB::default();
-        let options = AirCollisionOptions {
-            land_on_soft_platforms_from_below: true,
-            ..Default::default()
-        };
-        let solid_stage = StageCollision {
-            stage_polys: vec![solid_floor()],
-            ..Default::default()
-        };
-        let platform_stage = StageCollision {
-            stage_polys: vec![horizontal_platform("0")],
-            ..Default::default()
-        };
-
-        assert!(
-            air_collide_with_stage(
-                &previous_translation,
-                &translation,
-                &previous_ecb,
-                &ecb,
-                &solid_stage,
-                &[],
-                options,
-            )
-            .is_none()
-        );
-        assert!(
-            air_collide_with_stage(
-                &previous_translation,
-                &translation,
-                &previous_ecb,
-                &ecb,
-                &platform_stage,
-                &[0],
-                options,
-            )
-            .is_none()
-        );
-    }
 }

src/fighter/debug.rs

@@ -149,8 +149,6 @@ pub fn fighter_debug(
                                     last_frame.movement.x, last_frame.movement.y
                                 ));
                             });
-
-                            ui.label(format!("Flick age Y {}", input.peek_movement_flick_dbg()));
                         }
                         FighterDebugRowKind::Position => {
                             ui.label(format!("Position: {:?}", translation.0));
@@ -171,32 +169,21 @@ pub fn animation_debug(
         &FighterTranslation,
         &FighterFacingDirection,
         &FighterBoneMatrices,
-        &Fighter,
     )>,
     mut gizmos: Gizmos,
-    fighter_manifests: Res<Assets<FighterManifest>>,
 ) {
-    for (global_transform, facing_dir, matrices, fighter) in query {
+    for (global_transform, facing_dir, matrices) in query {
-        let Some(manifest) = fighter_manifests.get(&fighter.manifest) else {
-            continue;
-        };
         let global_transform = global_transform.get_3d_transform(facing_dir);
         let marker_transform = global_transform.to_mat4();
-        for (bone_name, matrix) in matrices.iter() {
+        for (_, matrix) in matrices.iter() {
             let pos = marker_transform.transform_point(Vec3::new(
                 matrix.cols[3][0].to_num(),
                 matrix.cols[3][1].to_num(),
                 matrix.cols[3][2].to_num(),
             ));
-
-            if manifest.ecb_bones.iter().any(|ecb_bone_name| ecb_bone_name == bone_name) {
-                gizmos.cross(pos, 1.0, bevy::color::palettes::css::GREEN);
-            } else {
             gizmos.cross(pos, 0.5, bevy::color::palettes::css::RED);
             gizmos.axes(marker_transform, 1.0);
         }
-
-        }
     }
 }
 
@@ -216,26 +203,6 @@ pub fn hurtbox_debug(
     }
 }
 
-pub fn ledge_grab_debug(query: Query<(&FighterTranslation, &Fighter)>, fighters: Res<Assets<FighterManifest>>, mut gizmos: Gizmos) {
-    for (translation, fighter) in query {
-        let Some(manifest) = fighters.get(&fighter.manifest) else {
-            continue;
-        };
-
-        let start_2d = translation.0 + manifest.ledge_grab_box_start;
-        let start_2d = Vec2::new(start_2d.x.to_num(), start_2d.y.to_num());
-
-        let end_2d = translation.0 + manifest.ledge_grab_box_end;
-        let end_2d = Vec2::new(end_2d.x.to_num(), end_2d.y.to_num());
-
-
-        let center = (start_2d + end_2d) * 0.5;
-        let size = (start_2d - end_2d).abs();
-        
-        gizmos.rect(Vec3::new(center.x, center.y, 0.0), size, bevy::color::palettes::css::BLUE);
-    }
-}
-
 /*fn draw_affine_capsule(
     gizmos: &mut Gizmos,
     capsule: FixedAffineCapsule,

src/fighter/ecb.rs

@@ -4,12 +4,14 @@ use crate::{
     fighter::{
         FighterFacingDirection, FighterSurfaceState, FighterTranslation,
         baked_animation::FighterBoneMatrices,
-    },
+    }, math::{int::FGi32, vec::FGVec2},
-    math::{int::FGi32, vec::FGVec2},
 };
 
+/// Environment collision box: the diamond used to resolve a fighter against
+/// the stage. Purely geometry — the collision response lives in
+/// [`super::collision`].
 #[derive(Component, Debug, Clone, Copy, Hash, Default)]
-#[require(FighterPreviousECB, FighterDesiredECB)]
+#[require(FighterPreviousECB)]
 pub struct FighterECB {
     pub top: FGVec2,
     pub bottom: FGVec2,
@@ -17,14 +19,6 @@ pub struct FighterECB {
     pub right: FGVec2,
 }
 
-#[derive(Component, Debug, Clone, Copy, Hash, Default)]
-pub struct FighterDesiredECB {
-    pub top: FGVec2,
-    pub bottom: FGVec2,
-    pub left: FGVec2,
-    pub right: FGVec2,
-}
-
 #[derive(Component, Debug, Clone)]
 pub struct FighterECBBoneIndices {
     pub indices: Vec<usize>,
@@ -49,96 +43,12 @@ impl From<FighterECB> for FighterPreviousECB {
     }
 }
 
-impl From<FighterECB> for FighterDesiredECB {
-    fn from(ecb: FighterECB) -> Self {
-        Self {
-            top: ecb.top,
-            bottom: ecb.bottom,
-            left: ecb.left,
-            right: ecb.right,
-        }
-    }
-}
-
-impl FighterDesiredECB {
-    pub fn as_ecb(self) -> FighterECB {
-        FighterECB {
-            top: self.top,
-            bottom: self.bottom,
-            left: self.left,
-            right: self.right,
-        }
-    }
-
-    pub fn validate(&mut self) {
-        let minimum = FGi32::lit("1.0");
-        if (self.top.y - self.bottom.y).abs() < minimum {
-            self.top.y += minimum;
-            let midpoint = (self.top.y + self.bottom.y) / FGi32::lit("2.0");
-            self.left.y = midpoint;
-            self.right.y = midpoint;
-        }
-        if self.top.y < minimum {
-            self.top.y = minimum;
-        }
-        if self.left.x > -minimum {
-            self.left.x = -minimum;
-        }
-        if self.right.x < minimum {
-            self.right.x = minimum;
-        }
-        if self.top.y < self.bottom.y {
-            self.top.y = self.bottom.y + minimum;
-        }
-
-        let midpoint = (self.top.y + self.bottom.y) / FGi32::lit("2.0");
-        if self.left.y < self.bottom.y || self.left.y > self.top.y {
-            self.left.y = midpoint;
-        }
-        if self.right.y < self.bottom.y || self.right.y > self.top.y {
-            self.left.y = midpoint;
-            self.right.y = midpoint;
-        }
-        let epsilon = FGi32::from_bits(66);
-        if self.top.y - self.right.y < epsilon
-            || self.right.y - self.bottom.y < epsilon
-        {
-            self.right.y = midpoint;
-        }
-        if self.top.y - self.left.y < epsilon
-            || self.left.y - self.bottom.y < epsilon
-        {
-            self.left.y = midpoint;
-        }
-    }
-}
-
 pub fn snapshot_fighter_ecb(fighters: Query<(&FighterECB, &mut FighterPreviousECB)>) {
     for (ecb, mut previous_ecb) in fighters {
         *previous_ecb = (*ecb).into();
     }
 }
 
-pub fn interpolate_ecb(ecb: &mut FighterECB, desired: FighterDesiredECB, time: FGi32) {
-    let lerp = |a: FGVec2, b: FGVec2| a + (b - a) * time;
-    ecb.top = lerp(ecb.top, desired.top);
-    ecb.bottom = lerp(ecb.bottom, desired.bottom);
-    ecb.left = lerp(ecb.left, desired.left);
-    ecb.right = lerp(ecb.right, desired.right);
-}
-
-pub fn ecb_max_delta(ecb: &FighterECB, desired: &FighterDesiredECB) -> FGi32 {
-    [
-        (desired.left.x - ecb.left.x).abs(),
-        (desired.right.x - ecb.right.x).abs(),
-        (desired.top.y - ecb.top.y).abs(),
-        (desired.right.y - ecb.right.y).abs(),
-    ]
-    .into_iter()
-    .max()
-    .unwrap_or(FGi32::ZERO)
-}
-
 impl FighterECB {
     pub fn to_3d_lineloop(&self, trf: Transform) -> [Vec3; 4] {
         [self.top, self.right, self.bottom, self.left]
@@ -148,17 +58,6 @@ impl FighterECB {
     pub fn get_bottom_point(&self) -> FGVec2 {
         self.bottom
     }
-
-    /// Change the local origin to the bottom point without moving the ECB in
-    /// world space. Grounded fighters use the floor contact as their origin.
-    pub fn rebase_onto_bottom(&mut self) -> FGVec2 {
-        let bottom = self.bottom;
-        self.top -= bottom;
-        self.left -= bottom;
-        self.right -= bottom;
-        self.bottom = FGVec2::ZERO;
-        bottom
-    }
 }
 
 impl FighterPreviousECB {
@@ -174,7 +73,7 @@ impl FighterPreviousECB {
 
 pub fn update_ecb(
     query: Query<(
-        &mut FighterDesiredECB,
+        &mut FighterECB,
         &FighterSurfaceState,
         &FighterECBBoneIndices,
         &FighterBoneMatrices,
@@ -182,14 +81,10 @@ pub fn update_ecb(
         &FighterFacingDirection,
     )>,
 ) {
-    for (mut desired, surface_state, bone_indices, bone_matrices, translation, facing_dir) in query
+    for (mut ecb, surface_state, bone_indices, bone_matrices, translation, facing_dir) in query {
-    {
         let trf = translation.get_3d_transform(facing_dir);
 
-        let transformed_ecb_bones = bone_indices
+        let transformed_ecb_bones = bone_indices.indices.iter().filter_map(|idx| {
-            .indices
-            .iter()
-            .filter_map(|idx| {
             let Some((_, bone_matrix)) = bone_matrices.get_by_idx(*idx) else {
                 return None;
             };
@@ -197,29 +92,12 @@ pub fn update_ecb(
             let pt = trf.transform_point(bone_matrix.get_translation());
 
             Some(FGVec2::new(pt.x, pt.y) - translation.0)
-            })
+        }).collect::<Vec<_>>();
-            .collect::<Vec<_>>();
 
-        let max_x = transformed_ecb_bones
+        let max_x = transformed_ecb_bones.iter().max_by(|a, b| a.x.cmp(&b.x)).map(|final_val| final_val.x).unwrap_or(FGi32::lit("0.5"));
-            .iter()
+        let min_x = transformed_ecb_bones.iter().min_by(|a, b| a.x.cmp(&b.x)).map(|final_val| final_val.x).unwrap_or(FGi32::lit("-0.5"));
-            .max_by(|a, b| a.x.cmp(&b.x))
+        let max_y = transformed_ecb_bones.iter().max_by(|a, b| a.y.cmp(&b.y)).map(|final_val| final_val.y).unwrap_or(FGi32::lit("0.5"));
-            .map(|final_val| final_val.x)
+        let min_y = transformed_ecb_bones.iter().min_by(|a, b| a.y.cmp(&b.y)).map(|final_val| final_val.y).unwrap_or(FGi32::lit("-0.5"));
-            .unwrap_or(FGi32::lit("0.5"));
-        let min_x = transformed_ecb_bones
-            .iter()
-            .min_by(|a, b| a.x.cmp(&b.x))
-            .map(|final_val| final_val.x)
-            .unwrap_or(FGi32::lit("-0.5"));
-        let max_y = transformed_ecb_bones
-            .iter()
-            .max_by(|a, b| a.y.cmp(&b.y))
-            .map(|final_val| final_val.y)
-            .unwrap_or(FGi32::lit("0.5"));
-        let min_y = transformed_ecb_bones
-            .iter()
-            .min_by(|a, b| a.y.cmp(&b.y))
-            .map(|final_val| final_val.y)
-            .unwrap_or(FGi32::lit("-0.5"));
 
         let midpoint_height = (max_y + min_y) / FGi32::lit("2.0");
         let top = FGVec2::new(FGi32::ZERO, max_y);
@@ -227,29 +105,24 @@ pub fn update_ecb(
         let left = FGVec2::new(min_x, midpoint_height);
         let right = FGVec2::new(max_x, midpoint_height);
 
-        let ecb_lock_frames_remaining = if let FighterSurfaceState::Airborne {
+        let ecb_lock_frames_remaining = if let FighterSurfaceState::Airborne { ecb_lock_frames_remaining, .. } = surface_state {
-            ecb_lock_frames_remaining,
-            ..
-        } = surface_state
-        {
             *ecb_lock_frames_remaining
         } else {
             0
         };
 
-        desired.top = top;
+        ecb.top = top;
 
         if ecb_lock_frames_remaining == 0 {
-            desired.bottom = bottom;
+            ecb.bottom = bottom;
         }
 
-        desired.left = left;
+        ecb.left = left;
-        desired.right = right;
+        ecb.right = right;
 
         if surface_state.is_grounded() {
-            desired.bottom = FGVec2::ZERO;
+            ecb.bottom = FGVec2::ZERO;
         }
-        desired.validate();
     }
 }
 
@@ -279,60 +152,4 @@ mod tests {
         assert_eq!(previous.left, current.left);
         assert_eq!(previous.right, current.right);
     }
-
-    #[test]
-    fn interpolation_reaches_target_with_full_step() {
-        let mut current = FighterECB {
-            top: FGVec2::lit("0", "1"),
-            bottom: FGVec2::lit("0", "0"),
-            left: FGVec2::lit("-1", "0.5"),
-            right: FGVec2::lit("1", "0.5"),
-        };
-        let desired = FighterDesiredECB {
-            top: FGVec2::lit("0", "3"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-2", "1"),
-            right: FGVec2::lit("2", "1"),
-        };
-        interpolate_ecb(&mut current, desired, FGi32::ONE);
-        assert_eq!(current.top, desired.top);
-        assert_eq!(current.bottom, desired.bottom);
-        assert_eq!(current.left, desired.left);
-        assert_eq!(current.right, desired.right);
-    }
-
-    #[test]
-    fn validation_repairs_tiny_and_out_of_range_diamond() {
-        let mut desired = FighterDesiredECB {
-            top: FGVec2::lit("0", "0.25"),
-            bottom: FGVec2::lit("0", "0"),
-            left: FGVec2::lit("0", "4"),
-            right: FGVec2::lit("0", "-4"),
-        };
-        desired.validate();
-
-        assert_eq!(desired.top.y, FGi32::lit("1.25"));
-        assert_eq!(desired.left.x, FGi32::lit("-1"));
-        assert_eq!(desired.right.x, FGi32::lit("1"));
-        assert_eq!(desired.left.y, FGi32::lit("0.625"));
-        assert_eq!(desired.right.y, FGi32::lit("0.625"));
-    }
-
-    #[test]
-    fn rebasing_onto_bottom_preserves_world_points() {
-        let origin = FGVec2::lit("4", "8");
-        let mut ecb = FighterECB {
-            top: FGVec2::lit("0", "3"),
-            bottom: FGVec2::lit("0", "-1"),
-            left: FGVec2::lit("-2", "1"),
-            right: FGVec2::lit("2", "1"),
-        };
-        let old_world_points = [ecb.top, ecb.bottom, ecb.left, ecb.right].map(|p| origin + p);
-        let new_origin = origin + ecb.bottom;
-        ecb.rebase_onto_bottom();
-        let new_world_points = [ecb.top, ecb.bottom, ecb.left, ecb.right].map(|p| new_origin + p);
-
-        assert_eq!(old_world_points, new_world_points);
-        assert_eq!(ecb.bottom, FGVec2::ZERO);
-    }
 }

src/fighter/manifest.rs

@@ -8,7 +8,11 @@ use strum::IntoEnumIterator;
 use strum_macros::EnumIter;
 
 use crate::{
-    AppState, fighter::{FighterAttributes, FighterCameraProfile, animation::AnimKind, attack::AttackKind}, game_settings::GameSettings, math::{int::FGi32, vec::FGVec2, vec3::FGVec3}, texture_reference::TextureReference,
+    AppState,
+    fighter::{FighterAttributes, FighterCameraProfile, animation::AnimKind, attack::AttackKind},
+    game_settings::GameSettings,
+    math::{int::FGi32, vec3::FGVec3},
+    texture_reference::TextureReference,
 };
 
 #[derive(
@@ -58,19 +62,10 @@ pub struct FighterManifest {
     pub icon: TextureReference,
     pub attributes: FighterAttributes,
     pub camera: FighterCameraProfile,
-    /// Bone whose model-space translation drives gameplay root motion.
-    #[serde(default = "default_root_motion_bone")]
-    pub root_motion_bone: String,
     pub animations: HashMap<AnimKind, String>,
     pub attack_scripts: HashMap<AttackKind, String>,
     pub hurtboxes: Vec<FighterHurtbox>,
     pub ecb_bones: Vec<String>,
-    pub ledge_grab_box_start: FGVec2,
-    pub ledge_grab_box_end: FGVec2,
-}
-
-fn default_root_motion_bone() -> String {
-    "root".into()
 }
 
 #[derive(Resource)]

src/fighter/mod.rs

@@ -10,7 +10,6 @@ pub mod animation;
 pub mod attack;
 pub mod attributes;
 pub mod baked_animation;
-pub mod blast_zones;
 pub mod collision;
 pub mod debug;
 pub mod ecb;
@@ -18,10 +17,10 @@ pub mod errors;
 pub mod hurtbox;
 pub mod manifest;
 pub mod motion;
-pub mod push;
 pub mod state;
 pub mod surface;
 pub mod visual;
+pub mod blast_zones;
 
 // The fighter components are re-exported so the rest of the crate can say
 // `fighter::FighterVelocity` without caring which file it lives in. Named
@@ -37,25 +36,13 @@ pub use motion::{
 pub use surface::FighterSurfaceState;
 
 use crate::{
-    AppState,
+    AppState, fighter::{
-    fighter::{
         attack::{
             AttackKind, FighterAttackPlugin, FighterAttackScriptAssets, FighterDamage,
-            FighterKnockbackState, FighterKnockbackVelocity, FighterPendingHitReaction,
+            FighterKnockbackVelocity, FighterPendingHitReaction, FighterSolvedHurtboxes,
-            FighterSolvedHurtboxes, FighterStaleMoveQueue,
+            FighterStaleMoveQueue,
-        },
+        }, baked_animation::{FighterBoneIndexMap, FighterBoneMatrices}, ecb::FighterECBBoneIndices, manifest::FighterManifest, state::{FighterState, air::AirborneStateCommon, fall::FallState}, visual::{FighterAnimations, FighterInvulnerabilityVisualState},
-        baked_animation::FighterBoneIndexMap,
+    }, game_settings::GameSettings, input::FighterInput, math::{int::FGi32, vec::FGVec2}, player::Player, schedule::GameplaySet, scripting::FighterAttackScript, stage::line::StageCollision,
-        ecb::{FighterDesiredECB, FighterECBBoneIndices},
-        manifest::FighterManifest,
-        state::{FighterState, air::AirborneStateCommon, fall::FallState},
-        visual::{FighterAnimations, FighterInvulnerabilityVisualState},
-    },
-    game_settings::GameSettings,
-    input::FighterInput,
-    math::{int::FGi32, vec::FGVec2},
-    player::Player,
-    schedule::GameplaySet,
-    scripting::FighterAttackScript,
 };
 use state::state_interrupt_system;
 
@@ -98,62 +85,12 @@ pub struct FighterHitstop {
     pub remaining_frames: u32,
 }
 
-#[derive(Component, Default, Copy, Clone, Hash, Debug, PartialEq, Eq)]
-pub struct FighterLedgeInformation {
-    pub regrab_lockout_remaining_frames: u32,
-    pub grab_count: u32,
-}
-
-impl FighterLedgeInformation {
-    pub fn start(&mut self, duration_frames: u32) {
-        self.regrab_lockout_remaining_frames = duration_frames;
-    }
-
-    pub fn is_regrab_lockout_active(&self) -> bool {
-        self.regrab_lockout_remaining_frames > 0
-    }
-
-    fn tick(&mut self) {
-        self.regrab_lockout_remaining_frames =
-            self.regrab_lockout_remaining_frames.saturating_sub(1);
-    }
-}
-
-#[cfg(test)]
-mod ledge_grab_lockout_tests {
-    use super::FighterLedgeInformation;
-
-    #[test]
-    fn lockout_expires_after_the_requested_number_of_ticks() {
-        let mut lockout = FighterLedgeInformation::default();
-        lockout.start(2);
-
-        assert!(lockout.is_regrab_lockout_active());
-        lockout.tick();
-        assert!(lockout.is_regrab_lockout_active());
-        lockout.tick();
-        assert!(!lockout.is_regrab_lockout_active());
-    }
-
-    #[test]
-    fn zero_duration_does_not_enable_lockout() {
-        let mut lockout = FighterLedgeInformation::default();
-        lockout.start(0);
-
-        assert!(!lockout.is_regrab_lockout_active());
-    }
-}
-
 #[derive(Component, Default, Copy, Clone, Hash)]
 pub enum FighterInvulnerabilityState {
     #[default]
     Vulnerable,
-    Invulnerable {
+    Invulnerable { frames_remaining: Option<u32> },
-        frames_remaining: Option<u32>,
+    Intangible { frames_remaining: Option<u32> }
-    },
-    Intangible {
-        frames_remaining: Option<u32>,
-    },
 }
 
 impl FighterFacingDirection {
@@ -210,12 +147,10 @@ pub struct FighterPendingRespawn(bool);
     FighterPendingHitReaction,
     FighterPendingRespawn,
     FighterHitstop,
-    FighterLedgeInformation,
     FighterKnockbackVelocity,
-    FighterKnockbackState,
     FighterTranslation,
     FighterInvulnerabilityState,
-    FighterInvulnerabilityVisualState
+    FighterInvulnerabilityVisualState,
 )]
 pub struct Fighter {
     pub manifest: Handle<FighterManifest>,
@@ -244,10 +179,7 @@ impl Plugin for FighterPlugin {
             )
             .add_systems(
                 GgrsSchedule,
-                (
+                (state::state_update_system, decay_hitstop, decay_invulnerability)
-                    state::state_update_system,
-                    decay_invulnerability,
-                )
                     .chain()
                     .in_set(GameplaySet::StateUpdate),
             )
@@ -260,27 +192,12 @@ impl Plugin for FighterPlugin {
             .add_systems(
                 GgrsSchedule,
                 (
-                    (
+                    (blast_zones::apply_blast_zones, ecb::update_ecb, ecb::decrement_ecb_lockout, state::state_collision_interrupt_system).chain(),
-                        blast_zones::apply_blast_zones,
-                        ecb::decrement_ecb_lockout,
-                        ecb::update_ecb,
-                        state::state_collision_interrupt_system,
-                        // Every gameplay phase must observe the same hitstop value.
-                        decay_hitstop,
-                        decay_ledge_grab_lockout,
-                    )
-                        .chain(),
                     baked_animation::resample_fighter_bone_matrices,
                 )
                     .chain()
                     .in_set(GameplaySet::Collision),
             )
-            .add_systems(
-                GgrsSchedule,
-                push::apply_grounded_pushes
-                    .before(state::state_update_system)
-                    .in_set(GameplaySet::StateUpdate),
-            )
             .add_systems(
                 PostUpdate,
                 (
@@ -288,7 +205,6 @@ impl Plugin for FighterPlugin {
                     animation::apply_animation,
                 )
                     .chain()
-                    .before(bevy::transform::TransformSystems::Propagate)
                     .run_if(in_state(crate::AppState::InMatch)),
             )
             // Rollback registration lives next to the systems that write these
@@ -296,8 +212,6 @@ impl Plugin for FighterPlugin {
             // is a desync waiting to happen.
             .rollback_component_with_copy::<FighterECB>()
             .checksum_component_with_hash::<FighterECB>()
-            .rollback_component_with_copy::<FighterDesiredECB>()
-            .checksum_component_with_hash::<FighterDesiredECB>()
             .rollback_component_with_clone::<FighterStaleMoveQueue>()
             .checksum_component_with_hash::<FighterStaleMoveQueue>()
             .rollback_component_with_copy::<ecb::FighterPreviousECB>()
@@ -325,25 +239,16 @@ impl Plugin for FighterPlugin {
             .checksum_component_with_hash::<FighterPendingRespawn>()
             .rollback_component_with_copy::<FighterHitstop>()
             .checksum_component_with_hash::<FighterHitstop>()
-            .rollback_component_with_copy::<FighterLedgeInformation>()
-            .checksum_component_with_hash::<FighterLedgeInformation>()
             .rollback_component_with_copy::<FighterInvulnerabilityState>()
             .checksum_component_with_hash::<FighterInvulnerabilityState>()
             .rollback_component_with_copy::<FighterKnockbackVelocity>()
             .checksum_component_with_hash::<FighterKnockbackVelocity>()
-            .rollback_component_with_copy::<FighterKnockbackState>()
+            .rollback_resource_with_reflect::<StageCollision>()
-            .checksum_component_with_hash::<FighterKnockbackState>()
-            .rollback_component_with_clone::<baked_animation::FighterBoneMatrices>()
-            .checksum_component_with_hash::<baked_animation::FighterBoneMatrices>()
             // Debug views.
             .add_systems(
                 FixedPostUpdate,
                 debug::debug_draw_ecb.run_if(crate::debug_tools::ecb_enabled),
             )
-            .add_systems(
-                FixedPostUpdate,
-                debug::ledge_grab_debug.run_if(crate::debug_tools::ledge_grab_enabled),
-            )
             .add_systems(
                 EguiPrimaryContextPass,
                 debug::fighter_debug.run_if(crate::debug_tools::fighter_info_enabled),
@@ -363,9 +268,8 @@ impl Plugin for FighterPlugin {
                     .run_if(crate::debug_tools::attack_hitboxes_enabled)
                     .run_if(in_state(AppState::InMatch)),
             )
-            .add_systems(
+            .add_systems(FixedPostUpdate, 
-                FixedPostUpdate,
+                visual::update_status_colors.run_if(resource_exists::<GameSettings>)
-                visual::update_status_colors.run_if(resource_exists::<GameSettings>),
             )
             .add_systems(
                 FixedPostUpdate,
@@ -373,8 +277,11 @@ impl Plugin for FighterPlugin {
             )
             .rollback_component_with_clone::<FighterState>()
             .rollback_component_with_clone::<FighterHitboxes>()
+            .rollback_component_with_clone::<FighterBoneMatrices>()
             .rollback_component_with_clone::<FighterHitstopShake>()
             .checksum_component_with_hash::<FighterHitboxes>()
+            .rollback_component_with_clone::<FighterSolvedHurtboxes>()
+            .checksum_component_with_hash::<FighterSolvedHurtboxes>()
             .checksum_component_with_hash::<FighterState>()
             .checksum_component_with_hash::<FighterFacingDirection>()
             .register_type::<FighterFacingDirection>();
@@ -425,11 +332,10 @@ pub fn spawn_fighter(
             Transform::from_scale(Vec3::splat(model_scale.to_num())),
             (
                 FighterECB::default(),
-                FighterDesiredECB::default(),
                 FighterHitboxes::default(),
                 FighterECBBoneIndices {
-                    indices: ecb_bone_indices,
+                    indices: ecb_bone_indices
-                },
+                }
             ),
             (
                 FighterVelocity::default(),
@@ -461,12 +367,6 @@ pub fn decay_hitstop(query: Query<(&mut FighterHitstop, &mut FighterHitstopShake
     }
 }
 
-pub fn decay_ledge_grab_lockout(query: Query<&mut FighterLedgeInformation>) {
-    for mut lockout in query {
-        lockout.tick();
-    }
-}
-
 pub fn decay_invulnerability(query: Query<&mut FighterInvulnerabilityState>) {
     for invuln_state in query {
         let invuln_state = invuln_state.into_inner();
@@ -479,7 +379,7 @@ pub fn decay_invulnerability(query: Query<&mut FighterInvulnerabilityState>) {
                 } else {
                     None
                 }
-            }
+            },
             FighterInvulnerabilityState::Intangible { frames_remaining } => {
                 if let Some(frames_remaining) = frames_remaining {
                     *frames_remaining = frames_remaining.saturating_sub(1);
@@ -487,7 +387,7 @@ pub fn decay_invulnerability(query: Query<&mut FighterInvulnerabilityState>) {
                 } else {
                     None
                 }
-            }
+            },
         };
 
         if let Some(frames_remaining) = frames_remaining {

src/fighter/push.rs

@@ -1,214 +0,0 @@
-//! fighter-to-fighter pushing
-
-use bevy::prelude::*;
-
-use crate::{
-    fighter::{
-        Fighter, FighterFacingDirection, FighterRoster, FighterSurfaceState, FighterTranslation,
-        manifest::FighterManifest,
-    },
-    game_settings::GameSettings,
-    math::int::FGi32,
-    stage::line::{StageCollision, StageLineID, StagePoly},
-};
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-struct Pushbox {
-    center: FGi32,
-    radius: FGi32,
-    line_id: StageLineID,
-}
-
-fn can_interact(stage: &StageCollision, first: StageLineID, second: StageLineID) -> bool {
-    if first.polygon != second.polygon {
-        return false;
-    }
-    if first.segment == second.segment {
-        return true;
-    }
-
-    let Some(poly) = stage.stage_polys.get(first.polygon) else {
-        return false;
-    };
-    adjacent_segment(poly, first.segment, second.segment)
-}
-
-fn adjacent_segment(poly: &StagePoly, first: usize, second: usize) -> bool {
-    poly.get_next_segment_index(first) == Some(second)
-        || poly.get_prev_segment_index(first) == Some(second)
-}
-
-fn push_delta(first: Pushbox, second: Pushbox, nudge: FGi32) -> FGi32 {
-    if (first.center - second.center).abs() >= first.radius + second.radius {
-        return FGi32::ZERO;
-    }
-    (first.center - second.center).signum() * nudge
-}
-
-fn calculate_push_deltas(
-    pushboxes: &[Option<Pushbox>],
-    stage: &StageCollision,
-    nudge: FGi32,
-) -> Vec<FGi32> {
-    let mut deltas = vec![FGi32::ZERO; pushboxes.len()];
-    for first in 0..pushboxes.len() {
-        let Some(first_pushbox) = pushboxes[first] else {
-            continue;
-        };
-        for second in 0..pushboxes.len() {
-            if first == second {
-                continue;
-            }
-            let Some(second_pushbox) = pushboxes[second] else {
-                continue;
-            };
-            if can_interact(stage, first_pushbox.line_id, second_pushbox.line_id) {
-                deltas[first] += push_delta(first_pushbox, second_pushbox, nudge);
-            }
-        }
-    }
-    deltas
-}
-
-pub fn apply_grounded_pushes(
-    roster: Res<FighterRoster>,
-    mut fighters: Query<(
-        &Fighter,
-        &mut FighterTranslation,
-        &FighterFacingDirection,
-        &FighterSurfaceState,
-    )>,
-    manifests: Res<Assets<FighterManifest>>,
-    settings: Res<GameSettings>,
-    stage: Res<StageCollision>,
-) {
-    let pushboxes = roster
-        .0
-        .iter()
-        .map(|entity| {
-            let Ok((fighter, translation, facing, surface)) = fighters.get(*entity) else {
-                return None;
-            };
-            let Some(line_id) = surface.line_id() else {
-                return None;
-            };
-            let manifest = manifests.get(&fighter.manifest)?;
-            let attributes = &manifest.attributes;
-            Some(Pushbox {
-                center: translation.x + facing.to_sign() * attributes.pushbox_offset,
-                radius: attributes.pushbox_radius,
-                line_id,
-            })
-        })
-        .collect::<Vec<_>>();
-    let deltas = calculate_push_deltas(
-        &pushboxes,
-        &stage,
-        settings.fighter_common.grounded_push_nudge,
-    );
-
-    for (entity, delta) in roster.0.iter().zip(deltas) {
-        if delta == FGi32::ZERO {
-            continue;
-        }
-        if let Ok((_, mut translation, _, _)) = fighters.get_mut(*entity) {
-            translation.x += delta;
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::math::vec::FGVec2;
-    use crate::stage::line::{StagePolyLineSegmentType, StagePolyType};
-
-    fn stage() -> StageCollision {
-        StageCollision {
-            stage_polys: vec![StagePoly::build(
-                StagePolyType::Platform,
-                &[
-                    (FGVec2::lit("0", "0"), StagePolyLineSegmentType::Floor),
-                    (FGVec2::lit("10", "0"), StagePolyLineSegmentType::Floor),
-                    (FGVec2::lit("20", "0"), StagePolyLineSegmentType::Floor),
-                    (FGVec2::lit("30", "0"), StagePolyLineSegmentType::Floor),
-                ],
-            )],
-            ..StageCollision::default()
-        }
-    }
-
-    fn box_at(x: &str, segment: usize) -> Pushbox {
-        Pushbox {
-            center: FGi32::lit(x),
-            radius: FGi32::lit("1"),
-            line_id: StageLineID {
-                polygon: 0,
-                segment,
-            },
-        }
-    }
-
-    #[test]
-    fn overlapping_pair_gets_opposite_fixed_nudges() {
-        let deltas = calculate_push_deltas(
-            &[Some(box_at("0", 0)), Some(box_at("1", 0))],
-            &stage(),
-            FGi32::lit("0.3"),
-        );
-        assert_eq!(deltas, vec![FGi32::lit("-0.3"), FGi32::lit("0.3")]);
-    }
-
-    #[test]
-    fn touching_pushboxes_do_not_nudge() {
-        let deltas = calculate_push_deltas(
-            &[Some(box_at("0", 0)), Some(box_at("2", 0))],
-            &stage(),
-            FGi32::lit("0.3"),
-        );
-        assert_eq!(deltas, vec![FGi32::ZERO, FGi32::ZERO]);
-    }
-
-    #[test]
-    fn adjacent_segments_can_push_and_unrelated_segments_cannot() {
-        let adjacent = calculate_push_deltas(
-            &[Some(box_at("9.5", 0)), Some(box_at("10", 1))],
-            &stage(),
-            FGi32::lit("0.3"),
-        );
-        assert_eq!(adjacent, vec![FGi32::lit("-0.3"), FGi32::lit("0.3")]);
-
-        let unrelated = calculate_push_deltas(
-            &[Some(box_at("1", 0)), Some(box_at("2", 2))],
-            &stage(),
-            FGi32::lit("0.3"),
-        );
-        assert_eq!(unrelated, vec![FGi32::ZERO, FGi32::ZERO]);
-    }
-
-    #[test]
-    fn multiple_overlaps_accumulate() {
-        let deltas = calculate_push_deltas(
-            &[
-                Some(box_at("0", 0)),
-                Some(box_at("0.5", 0)),
-                Some(box_at("1", 0)),
-            ],
-            &stage(),
-            FGi32::lit("0.3"),
-        );
-        assert_eq!(
-            deltas,
-            vec![FGi32::lit("-0.6"), FGi32::ZERO, FGi32::lit("0.6")]
-        );
-    }
-
-    #[test]
-    fn system_parameters_initialize_without_query_conflicts() {
-        let mut world = World::new();
-        let mut schedule = Schedule::default();
-        schedule.add_systems(apply_grounded_pushes);
-
-        schedule.initialize(&mut world).unwrap();
-    }
-}

src/fighter/state/air.rs

@@ -1,9 +1,6 @@
-use crate::fighter::state::jump::{self};
+use crate::fighter::state::jump::{JumpState, JumpType};
 use crate::fighter::state::land::{LandingState, LandingType};
-use crate::fighter::state::ledge_grab::LedgeGrabState;
+use crate::fighter::state::{CollisionContext, FighterState, InterruptContext, air_attack, air_dodge};
-use crate::fighter::state::{
-    CollisionContext, FighterState, InterruptContext, air_attack, air_dodge,
-};
 use crate::fighter::*;
 use crate::input::FighterCommands;
 
@@ -93,19 +90,6 @@ pub fn apply_air_motion(
     translation.0 += velocity.0;
 }
 
-/// Applies ordinary and launch velocity together, then advances launch decay.
-/// Hitstop skips state updates entirely, so neither decay nor launch age moves
-/// while the fighter is frozen.
-pub fn apply_air_motion_with_knockback(ctx: &mut crate::fighter::state::UpdateContext) {
-    let combined_velocity = FighterVelocity(ctx.velocity.0 + ctx.knockback_velocity.0);
-    apply_air_motion(&combined_velocity, ctx.translation, ctx.prev_translation);
-    attack::decay_knockback(
-        ctx.knockback_velocity,
-        ctx.knockback_state,
-        ctx.game_settings.fighter_common.knockback_decay_per_frame,
-    );
-}
-
 pub fn update_standard_motion(
     ctx: &mut crate::fighter::state::UpdateContext,
     airborne_common: &mut AirborneStateCommon,
@@ -122,40 +106,38 @@ pub fn update_standard_motion(
         airborne_common.is_fast_falling,
     );
     apply_air_drift(ctx.velocity, ctx.fighter_attributes, ctx.input);
-    apply_air_motion_with_knockback(ctx);
+    apply_air_motion(
+        ctx.velocity,
+        ctx.translation,
+        ctx.prev_translation,
+    );
 }
 
-pub fn air_interrupts_common(
+pub fn air_interrupts_common(ctx: &mut InterruptContext, airborne_state_common: &AirborneStateCommon) -> Option<FighterState> {
-    ctx: &mut InterruptContext,
+    if ctx.input.has_command(FighterCommands::Jump) {
-    airborne_state_common: &AirborneStateCommon,
+            Some(FighterState::Jump(JumpState {
-) -> Option<FighterState> {
+                jump_type: JumpType::DoubleJump,
-    jump::check_input_double_jump(ctx).or_else(|| {
+                airborne_state_common: AirborneStateCommon::default(),
-        air_dodge::check_input(ctx)
+            }))
-            .or_else(|| air_attack::check_interrupt(ctx, airborne_state_common))
+    } else {
-    })
+        air_dodge::check_input(ctx).or_else(|| air_attack::check_interrupt(ctx, airborne_state_common))
+    }
 }
 
 pub fn collision_interrupt(
     ctx: &mut CollisionContext,
     landing_type: LandingType,
-    options: crate::fighter::collision::AirCollisionOptions,
+    can_ignore_soft_platforms: bool,
 ) -> Option<FighterState> {
-    if ctx.velocity.y <= FGi32::ZERO {
+    let res = ctx.air_collide_with_stage(can_ignore_soft_platforms)?;
-        if let Some(ledge_result) = ctx.air_collide_with_ledges() {
+    let diff = res.hit_position - ctx.translation.0;
-            ctx.apply_desired_ecb();
+    ctx.ecb.bottom -= diff;
-            return Some(FighterState::LedgeGrab(LedgeGrabState::new(ledge_result.ledge)));
+    ctx.ecb.top -= diff;
-        }
+    ctx.ecb.left -= diff;
-    }
+    ctx.ecb.right -= diff;
-
+    ctx.translation.0 = res.hit_position;
-    let res = ctx.air_collide_with_stage(options)?;
-    ctx.translation.0 = res.resolved_translation;
-    let bottom_offset = ctx.ecb.rebase_onto_bottom();
-    ctx.translation.0 += bottom_offset;
-    *ctx.desired_ecb = crate::fighter::ecb::FighterDesiredECB::from(*ctx.ecb);
     ctx.presentation_snap.0 = true;
-    ctx.surface.land(res.line_id, ctx.ledge_info);
+    ctx.surface.land(res.line_id);
-    ctx.knockback_velocity.0 = FGVec2::ZERO;
-    ctx.knockback_state.clear();
     Some(FighterState::Land(LandingState::create(landing_type)))
 }
 
@@ -169,8 +151,6 @@ mod tests {
 
     fn test_attributes() -> FighterAttributes {
         FighterAttributes {
-            pushbox_offset: FGi32::ZERO,
-            pushbox_radius: FGi32::ONE,
             base_walk_accel: FGi32::ZERO,
             stick_walk_accel: FGi32::ZERO,
             max_walk_vel: FGi32::ZERO,
@@ -203,7 +183,6 @@ mod tests {
             air_dodge_decay: FGi32::ZERO,
             air_dodge_intangible_duration: 29,
             air_dodge_intangible_start: 4,
-            dash_attack_cancel_window: 3,
         }
     }
 

src/fighter/state/air_attack.rs

@@ -93,7 +93,7 @@ impl FighterStateImpl for AirAttackState {
         let coll_interrupt = air::collision_interrupt(
             state_context,
             crate::fighter::state::land::LandingType::Normal,
-            Default::default(),
+            false,
         );
 
         coll_interrupt.map(|state| {

src/fighter/state/air_dodge.rs

@@ -1,9 +1,17 @@
 use crate::{
     fighter::{
-        FighterInvulnerabilityState, animation::AnimKind, state::{
+        FighterInvulnerabilityState,
-            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext, UpdateContext, air::{self, AirborneStateCommon}, fall::FallState, land::{LandingState, LandingType},
+        animation::AnimKind,
+        state::{
+            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext,
+            UpdateContext,
+            air::{self, AirborneStateCommon},
+            fall::FallState,
+            land::LandingType,
         },
-    }, input, math::vec::FGVec2, stage::line::{StageLineID, StagePolyLineSegmentType},
+    },
+    input,
+    math::vec::FGVec2,
 };
 
 #[derive(Debug, Clone, Hash)]
@@ -33,44 +41,18 @@ impl FighterStateImpl for AirDodgeState {
         }
         state_context.velocity.0 *= state_context.fighter_attributes.air_dodge_decay;
 
-        air::apply_air_motion_with_knockback(state_context);
+        air::apply_air_motion(
+            state_context.velocity,
+            state_context.translation,
+            state_context.prev_translation,
+        );
     }
 
     fn check_collision_interrupt(
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        let can_wavesnap = self.direction.y.is_zero() || self.direction.y.is_negative();
+        air::collision_interrupt(state_context, LandingType::Special, false)
-        
-        if can_wavesnap {
-            for (poly_idx, poly) in state_context.stage_collision.stage_polys.iter().enumerate() {
-                for (segment_idx, segment) in poly.segments.iter().enumerate() {
-                    if !matches!(segment.segment_type, StagePolyLineSegmentType::Floor) {
-                        continue;
-                    }
-                    let bottom_point = state_context.translation.0 + state_context.ecb.get_bottom_point();
-                    let point_in_segment = segment.segment.closest_point(bottom_point);
-                    let dist_to_segment = point_in_segment.distance(bottom_point);
-                    if dist_to_segment <= state_context.waveland_snap_distance {
-                        state_context.ecb.bottom = point_in_segment - state_context.translation.0;
-                        state_context.ecb.rebase_onto_bottom();
-                        state_context.surface.land(StageLineID { polygon: poly_idx, segment: segment_idx }, state_context.ledge_info);
-                        state_context.knockback_velocity.0 = FGVec2::ZERO;
-                        state_context.knockback_state.clear();
-                        return Some(FighterState::Land(LandingState::create(LandingType::Special)));
-                    }
-                }
-            }
-        }
-
-        air::collision_interrupt(
-            state_context,
-            LandingType::Special,
-            crate::fighter::collision::AirCollisionOptions {
-                land_on_soft_platforms_from_below: true,
-                ..Default::default()
-            },
-        )
     }
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {

src/fighter/state/angel.rs

@@ -43,9 +43,8 @@ impl FighterStateImpl for AngelState {
     
     fn check_collision_interrupt(
         &mut self,
-        state_context: &mut super::CollisionContext,
+        _state_context: &mut super::CollisionContext,
     ) -> Option<super::FighterState> {
-        state_context.apply_desired_ecb();
         None
     }
     

src/fighter/state/crouch.rs

@@ -148,15 +148,6 @@ impl FighterStateImpl for CrouchState {
     }
 }
 
-impl CrouchState {
-    pub fn is_crouch_cancelling(&self) -> bool {
-        match self.sub_state {
-            CrouchSubState::Entering { .. } | CrouchSubState::Idle => true,
-            CrouchSubState::Exiting => false,
-        }
-    }
-}
-
 pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();
 

src/fighter/state/dash.rs

@@ -4,7 +4,7 @@ use super::{
 };
 use crate::fighter::FighterFacingDirection;
 use crate::fighter::animation::AnimKind;
-use crate::fighter::state::{FighterState, ground_attack};
+use crate::fighter::state::FighterState;
 use crate::input::FighterCommands::{SmashMoveLeft, SmashMoveRight};
 
 #[derive(Debug, Clone, Hash)]
@@ -23,16 +23,6 @@ impl FighterStateImpl for DashState {
     fn check_interrupt(&self, ctx: &mut InterruptContext) -> Option<FighterState> {
         let attributes = ctx.fighter_attributes;
 
-        if ctx.get_current_animation_frame() <= 2 || ctx.input.get_last_frame().movement.x.signum() != self.direction.to_sign() {
-            if let Some(state) = ground_attack::check_interrupt(ctx) {
-                return Some(state);
-            }
-        } else {
-            if let Some(state) = ground_attack::check_interrupt_dash_attack(ctx) {
-                return Some(state);
-            }
-        }
-
         // A reverse dash can interrupt before IASA
         if let Some(direction) =
             check_smash_input_with_dir(ctx).filter(|direction| *direction != self.direction)
@@ -99,6 +89,7 @@ impl FighterStateImpl for DashState {
         ground::apply_grounded_motion(
             state_context.velocity,
             state_context.translation,
+            state_context.prev_translation,
         );
     }
 

src/fighter/state/fall.rs

@@ -25,7 +25,6 @@ impl FighterStateImpl for FallState {
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.play_animation(AnimKind::Fall, true);
-        state_context.velocity.x = state_context.velocity.x.clamp(-state_context.fighter_attributes.air_drift_max, state_context.fighter_attributes.air_drift_max);
     }
 
     fn update(&mut self, state_context: &mut UpdateContext) {
@@ -39,10 +38,7 @@ impl FighterStateImpl for FallState {
         air::collision_interrupt(
             state_context,
             crate::fighter::state::land::LandingType::Normal,
-            crate::fighter::collision::AirCollisionOptions {
+            true,
-                can_pass_through_soft_platforms: true,
-                ..Default::default()
-            },
         )
     }
     

src/fighter/state/ground.rs

@@ -2,20 +2,16 @@
 //! ECS types so it stays cheap to reason about and to unit-test — it has to be
 //! bit-for-bit deterministic for rollback.
 
-use crate::fighter::state::air_dodge::AirDodgeState;
 use crate::fighter::state::{
-    CollisionContext, FighterState, InterruptContext, air, crouch, dash, fall, ground_attack, turn,
+    CollisionContext, FighterState, InterruptContext, air, crouch, dash, fall, ground_attack, turn, wait, walk,
-    wait, walk,
+};
+use crate::fighter::{
+    FighterAttributes, FighterPreviousTranslation, FighterTranslation, FighterVelocity,
 };
-use crate::fighter::{collision, ecb};
-use crate::fighter::{FighterAttributes, FighterTranslation, FighterVelocity};
 use crate::game_settings::GameSettings;
-use crate::input::FighterInput;
 use crate::math::int::{FGWide, FGi32};
 use crate::math::vec::FGVec2;
-use crate::stage::line::{StagePoly, StagePolyLineSegment, StagePolyLineSegmentType};
+use crate::stage::line::{StageLineID, StagePoly, StagePolyLineSegment, StagePolyLineSegmentType};
-#[cfg(test)]
-use crate::stage::line::StageLineID;
 
 pub fn apply_grounded_friction(friction: FGi32, ground_vel: FGi32) -> FGi32 {
     if friction.abs() > ground_vel.abs() {
@@ -150,8 +146,13 @@ fn resolve_grounded_position(
     GroundedPositionResult::InAir
 }
 
-pub fn apply_grounded_motion(velocity: &FighterVelocity, translation: &mut FighterTranslation) {
+pub fn apply_grounded_motion(
+    velocity: &FighterVelocity,
+    translation: &mut FighterTranslation,
+    prev_translation: &mut FighterPreviousTranslation,
+) {
     // Vertical velocity should be 0 on the ground
+    prev_translation.0 = translation.0;
     translation.0 += FGVec2::new(velocity.0.x, FGi32::ZERO);
 }
 
@@ -168,84 +169,68 @@ pub fn update_friction_motion(ctx: &mut crate::fighter::state::UpdateContext) {
 
     let ground_velocity = ctx.velocity.x;
     ctx.velocity.x += apply_grounded_friction(friction, ground_velocity);
-    apply_grounded_motion(ctx.velocity, ctx.translation);
+    apply_grounded_motion(ctx.velocity, ctx.translation, ctx.prev_translation);
 }
 
 pub fn collide_with_stage_grounded(
     state_context: &mut CollisionContext,
     can_walk_off: bool,
 ) -> GroundedMotionResult {
-    let Some(mut line_id) = state_context.surface.line_id() else {
+    let translation = &mut state_context.translation;
-        state_context.apply_desired_ecb();
+    let ecb = &state_context.ecb;
+    let stage_collision = state_context.stage_collision;
+
+    let Some(current_line_id) = state_context.surface.line_id() else {
         return GroundedMotionResult::InAir;
     };
-    let requested_translation = state_context.translation.0;
-    let movement = requested_translation - state_context.prev_translation.0;
-    let largest_change = movement
-        .x
-        .abs()
-        .max(movement.y.abs())
-        .max(ecb::ecb_max_delta(state_context.ecb, state_context.desired_ecb));
-    let steps = collision::collision_step_count(largest_change);
-    let movement_per_step = movement / FGi32::from_num(steps);
-    let mut current_position = state_context.prev_translation.0;
-    let mut current_ecb = *state_context.ecb;
 
-    for step in 0..steps {
+    let stage_poly = stage_collision.stage_polys.get(current_line_id.polygon);
-        ecb::interpolate_ecb(
-            &mut current_ecb,
-            *state_context.desired_ecb,
-            FGi32::ONE / FGi32::from_num(steps - step),
-        );
-        current_position = if step + 1 == steps {
-            requested_translation
-        } else {
-            state_context.prev_translation.0
-                + movement_per_step * FGi32::from_num(step + 1)
-        };
 
-        let Some(stage_poly) = state_context.stage_collision.stage_polys.get(line_id.polygon) else {
+    if let Some(stage_poly) = stage_poly {
-            *state_context.ecb = current_ecb;
+        let ecb_bottom_pos = translation.0 + ecb.get_bottom_point();
-            state_context.translation.0 = current_position;
-            state_context.surface.apply_airborne_policy(
-                crate::fighter::surface::EcbLockPolicy::StartOnDetach,
-                state_context.leave_ground_ecb_lock_duration,
-            );
-            return GroundedMotionResult::InAir;
-        };
         match resolve_grounded_position(
             stage_poly,
-            line_id.segment,
+            current_line_id.segment,
-            current_position + current_ecb.bottom,
+            ecb_bottom_pos,
             can_walk_off,
         ) {
-            GroundedPositionResult::InGround { point, segment_idx, blocked } => {
+            GroundedPositionResult::InGround {
-                line_id.segment = segment_idx;
+                point,
-                current_position = point - current_ecb.bottom;
+                segment_idx,
-                let segment = stage_poly.get_segment(segment_idx).unwrap();
+                blocked,
+            } => {
+                let current_segment = stage_poly.get_segment(segment_idx).unwrap();
+                translation.0 = point - ecb.get_bottom_point();
                 state_context.velocity.0 = if blocked {
                     FGVec2::ZERO
                 } else {
                     state_context.velocity.0
-                        - state_context.velocity.0.project_onto_normalized(segment.normal)
+                        - state_context
+                            .velocity
+                            .0
+                            .project_onto_normalized(current_segment.normal)
                 };
+                state_context.surface.land(StageLineID {
+                    polygon: current_line_id.polygon,
+                    segment: segment_idx,
+                });
+                GroundedMotionResult::InGround
             }
             GroundedPositionResult::InAir => {
-                *state_context.ecb = current_ecb;
-                state_context.translation.0 = current_position;
                 state_context.surface.apply_airborne_policy(
                     crate::fighter::surface::EcbLockPolicy::StartOnDetach,
                     state_context.leave_ground_ecb_lock_duration,
                 );
-                return GroundedMotionResult::InAir;
+                GroundedMotionResult::InAir
             }
         }
+    } else {
+        state_context.surface.apply_airborne_policy(
+            crate::fighter::surface::EcbLockPolicy::StartOnDetach,
+            state_context.leave_ground_ecb_lock_duration,
+        );
+        GroundedMotionResult::InAir
     }
-
-    *state_context.ecb = current_ecb;
-    state_context.translation.0 = current_position;
-    state_context.surface.land(line_id, state_context.ledge_info);
-    GroundedMotionResult::InGround
 }
 
 pub fn collision_interrupt(ctx: &mut CollisionContext, can_walk_off: bool) -> Option<FighterState> {
@@ -260,14 +245,10 @@ pub fn collision_interrupt(ctx: &mut CollisionContext, can_walk_off: bool) -> Op
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::fighter::attack::{FighterKnockbackState, FighterKnockbackVelocity};
+    use crate::fighter::ecb::FighterPreviousECB;
-    use crate::fighter::ecb::{FighterDesiredECB, FighterPreviousECB};
+    use crate::fighter::{FighterECB, FighterSurfaceState};
-    use crate::fighter::{
-        FighterECB, FighterLedgeInformation, FighterPreviousTranslation, FighterSurfaceState,
-    };
-    use crate::input::FighterInput;
-    use crate::math::rect::FGRect;
     use crate::stage::line::StagePolyType;
+    use crate::input::FighterInput;
 
     fn two_segment_floor() -> StagePoly {
         StagePoly::build(
@@ -378,7 +359,6 @@ mod tests {
     fn grounded_collision_updates_surface_segment() {
         let stage_collision = crate::stage::line::StageCollision {
             stage_polys: vec![two_segment_floor()],
-            ..crate::stage::line::StageCollision::default()
         };
         let mut surface = FighterSurfaceState::Grounded {
             line_id: StageLineID {
@@ -389,9 +369,6 @@ mod tests {
         let mut translation = FighterTranslation(FGVec2::lit("11", "0"));
         let previous_translation = FighterPreviousTranslation(translation.0);
         let mut velocity = FighterVelocity::default();
-        let mut knockback_velocity = FighterKnockbackVelocity::default();
-        let mut knockback_state = FighterKnockbackState::default();
-        let mut ledge_info = FighterLedgeInformation::default();
         let mut ecb = FighterECB {
             bottom: FGVec2::lit("0.0", "-0.5"),
             top: FGVec2::lit("0.0", "0.5"),
@@ -399,29 +376,19 @@ mod tests {
             right: FGVec2::lit("0.5", "0.0"),
         };
         let previous_ecb = FighterPreviousECB::from(ecb);
-        let mut desired_ecb = FighterDesiredECB::from(ecb);
         let mut presentation_snap = crate::fighter::FighterPresentationSnap::default();
         let mut context = CollisionContext {
             translation: &mut translation,
             prev_translation: &previous_translation,
             input: &FighterInput::default(),
             velocity: &mut velocity,
-            knockback_velocity: &mut knockback_velocity,
-            knockback_state: &mut knockback_state,
             surface: &mut surface,
             ecb: &mut ecb,
-            desired_ecb: &mut desired_ecb,
-            ledge_info: &mut ledge_info,
             prev_ecb: &previous_ecb,
             stage_collision: &stage_collision,
             leave_ground_ecb_lock_duration: 10,
             presentation_snap: &mut presentation_snap,
             downward_stick_threshold: FGi32::ONE,
-            fighter_ledge_collision_box: FGRect {
-                origin: FGVec2::ZERO,
-                end: FGVec2::ZERO,
-            },
-            waveland_snap_distance: FGi32::ZERO,
         };
 
         assert!(matches!(
@@ -447,7 +414,6 @@ mod tests {
                     (FGVec2::lit("10", "0"), StagePolyLineSegmentType::Floor),
                 ],
             )],
-            ..crate::stage::line::StageCollision::default()
         };
         let mut surface = FighterSurfaceState::Grounded {
             line_id: StageLineID {
@@ -458,8 +424,6 @@ mod tests {
         let mut translation = FighterTranslation(FGVec2::lit("11", "0"));
         let previous_translation = FighterPreviousTranslation(translation.0);
         let mut velocity = FighterVelocity::default();
-        let mut knockback_velocity = FighterKnockbackVelocity::default();
-        let mut knockback_state = FighterKnockbackState::default();
         let mut ecb = FighterECB {
             bottom: FGVec2::lit("0.0", "-0.5"),
             top: FGVec2::lit("0.0", "0.5"),
@@ -467,30 +431,19 @@ mod tests {
             right: FGVec2::lit("0.5", "0.0"),
         };
         let previous_ecb = FighterPreviousECB::from(ecb);
-        let mut desired_ecb = FighterDesiredECB::from(ecb);
         let mut presentation_snap = crate::fighter::FighterPresentationSnap::default();
-        let mut ledge_info = FighterLedgeInformation::default();
         let mut context = CollisionContext {
             translation: &mut translation,
             prev_translation: &previous_translation,
             input: &FighterInput::default(),
             velocity: &mut velocity,
-            knockback_velocity: &mut knockback_velocity,
-            knockback_state: &mut knockback_state,
             surface: &mut surface,
             ecb: &mut ecb,
-            desired_ecb: &mut desired_ecb,
-            ledge_info: &mut ledge_info,
             prev_ecb: &previous_ecb,
             stage_collision: &stage_collision,
             leave_ground_ecb_lock_duration: 10,
             presentation_snap: &mut presentation_snap,
             downward_stick_threshold: FGi32::ONE,
-            fighter_ledge_collision_box: FGRect {
-                origin: FGVec2::ZERO,
-                end: FGVec2::ZERO,
-            },
-            waveland_snap_distance: FGi32::ZERO,
         };
 
         assert!(matches!(
@@ -526,22 +479,3 @@ pub fn grounded_movement_standstill_common_interrupts(
         None
     }
 }
-
-pub fn perform_wavedash(input: &FighterInput, game_settings: &GameSettings) -> FighterState {
-    // If aiming sideways and in the deadzone, do a perfect wavedash
-    // TODO: Improve this so we don't have to go through the airborne state first
-    let mut wavedash_dir = input.get_last_frame().movement.normalize_or_zero();
-    let movement = input.get_last_frame().movement;
-    if movement.y.is_zero() && !movement.x.is_zero() {
-        wavedash_dir.y = -game_settings.input_common.stick_deadzone - FGi32::lit("-0.01");
-        wavedash_dir.x = movement.x.signum();
-    }
-
-    if wavedash_dir == FGVec2::ZERO {
-        wavedash_dir = FGVec2::lit("0.0", "-1.0");
-    }
-
-    FighterState::AirDodge(AirDodgeState {
-        direction: wavedash_dir.normalize_or_zero(),
-    })
-}

src/fighter/state/ground_attack.rs

@@ -1,39 +1,20 @@
-use bevy::{asset::Assets, log::error};
+use crate::fighter::{
-
+    attack::{AttackKind, update_active_attack},
-use crate::{
-    fighter::{
-        attack::{AttackKind, FighterAttackScriptAssets, update_active_attack},
     state::{
         CollisionContext, EnterContext, ExitContext, FighterState, FighterStateImpl,
-            InterruptContext, UpdateContext, ground, wait::WaitState,
+        InterruptContext, UpdateContext, wait::WaitState,
     },
-    },
-    scripting::FighterAttackScript,
 };
 
 #[derive(Clone, Debug, Hash)]
 pub struct GroundAttackState {
     pub attack_kind: AttackKind,
-    pub use_root_motion: bool,
 }
 
 impl FighterStateImpl for GroundAttackState {
     const NAME: &'static str = "GroundAttack";
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        // Allow interrupting dash attack only into an up/down smash
-        if let AttackKind::DashAttack = self.attack_kind {
-            if state_context.get_current_animation_frame() < state_context.fighter_attributes.dash_attack_cancel_window {
-                if let Some(state) = check_interrupt(state_context) {
-                    if let FighterState::GroundAttack(state) = state {
-                        if matches!(state.attack_kind, AttackKind::UpSmash) || matches!(state.attack_kind, AttackKind::DownSmash) {
-                            return Some(FighterState::GroundAttack(state));
-                        }
-                    }
-                }
-            }
-        }
-
         if state_context.is_current_animation_finished() {
             Some(FighterState::Wait(WaitState))
         } else {
@@ -56,17 +37,6 @@ impl FighterStateImpl for GroundAttackState {
                     .expect("ground attack must have active hitboxes"),
                 animation_frame,
             );
-
-            // root motion
-            if script.use_root_motion {
-                state_context.velocity.0.x = state_context.animation_root_motion_delta.x;
-                ground::apply_grounded_motion(
-                    state_context.velocity,
-                    state_context.translation,
-                );
-            } else {
-                ground::update_friction_motion(state_context);
-            }
         }
     }
 
@@ -78,7 +48,7 @@ impl FighterStateImpl for GroundAttackState {
         let script = state_context.attack_script_assets.scripts[&self.attack_kind].clone();
         state_context.hitboxes.0 = Some(crate::fighter::FighterActiveAttack {
             kind: self.attack_kind,
-            script: script.clone(),
+            script,
             active_hitboxes: Vec::new(),
             solved_hitboxes: Vec::new(),
             hit_groups: Vec::new(),
@@ -92,9 +62,9 @@ impl FighterStateImpl for GroundAttackState {
 
     fn check_collision_interrupt(
         &mut self,
-        state_context: &mut CollisionContext,
+        _state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, !self.use_root_motion)
+        None
     }
 
     fn is_visually_grounded<'a>(&'a self) -> bool {
@@ -102,51 +72,6 @@ impl FighterStateImpl for GroundAttackState {
     }
 }
 
-impl GroundAttackState {
-    fn create(
-        attack_kind: AttackKind,
-        attack_script_assets: &FighterAttackScriptAssets,
-        attack_scripts: &Assets<FighterAttackScript>,
-    ) -> Result<Self, AirAttackStateCreateError> {
-        let asset_script = attack_script_assets.scripts.get(&attack_kind).ok_or(
-            AirAttackStateCreateError::AttackScriptAssetNotFound {
-                attack: attack_kind,
-            },
-        )?;
-
-        let script = attack_scripts.get(asset_script).ok_or(
-            AirAttackStateCreateError::AttackScriptNotFound {
-                attack: attack_kind,
-            },
-        )?;
-
-        Ok(Self {
-            attack_kind,
-            use_root_motion: script.use_root_motion
-        })
-    }
-}
-
-#[derive(thiserror::Error, Debug)]
-pub enum AirAttackStateCreateError {
-    #[error("Attack script: {attack:?} not found")]
-    AttackScriptNotFound { attack: AttackKind },
-    #[error("Attack script asset: {attack:?} not found")]
-    AttackScriptAssetNotFound { attack: AttackKind },
-}
-
-pub fn check_interrupt_shared(state_context: &InterruptContext, attack_kind: AttackKind) -> Option<FighterState> {
-    let state = GroundAttackState::create(attack_kind, state_context.attack_script_assets, state_context.attack_scripts);
-
-    match state {
-        Ok(state) => Some(FighterState::GroundAttack(state)),
-        Err(create_error) => {
-            error!("{}", create_error);
-            None
-        },
-    }
-}
-
 pub fn check_interrupt(state_context: &InterruptContext) -> Option<FighterState> {
     if state_context
         .input
@@ -156,18 +81,9 @@ pub fn check_interrupt(state_context: &InterruptContext) -> Option<FighterState>
             .input
             .get_attack_command_type()
             .to_attack_kind_grounded();
-        check_interrupt_shared(state_context, attack_kind)
+        Some(FighterState::GroundAttack(GroundAttackState {
-    } else {
+            attack_kind,
-        None
+        }))
-    }
-}
-
-pub fn check_interrupt_dash_attack(state_context: &InterruptContext) -> Option<FighterState> {
-    if state_context
-        .input
-        .has_command(crate::input::FighterCommands::Attack)
-    {
-        check_interrupt_shared(state_context, AttackKind::DashAttack)
     } else {
         None
     }

src/fighter/state/hitstun.rs

@@ -1,6 +1,8 @@
 use crate::{
     fighter::{
-        animation::AnimKind, attack::{self, FighterHitReaction}, state::{
+        animation::AnimKind,
+        attack::{self, FighterHitReaction},
+        state::{
             CollisionContext, EnterContext, ExitContext, FighterState, FighterStateImpl,
             InterruptContext, UpdateContext,
             air::{self, AirborneStateCommon},
@@ -9,7 +11,7 @@ use crate::{
             land::LandingType,
             wait::WaitState,
         },
-    }, math::vec::FGVec2,
+    }, math::{int::FGi32, vec::FGVec2},
 };
 
 #[derive(Clone, Debug, Hash)]
@@ -23,20 +25,14 @@ pub struct HitstunState {
     pub hit_reaction: FighterHitReaction,
     pub hitstop_kind: HitstopStateKind,
     knockback_applied: bool,
-    stack_previous_knockback: bool,
 }
 
 impl HitstunState {
-    pub fn new(
+    pub fn new(hit_reaction: FighterHitReaction, hitstop_kind: HitstopStateKind) -> Self {
-        hit_reaction: FighterHitReaction,
-        hitstop_kind: HitstopStateKind,
-        stack_previous_knockback: bool,
-    ) -> Self {
         Self {
             hit_reaction,
             hitstop_kind,
             knockback_applied: false,
-            stack_previous_knockback,
         }
     }
 }
@@ -44,35 +40,6 @@ impl HitstunState {
 impl FighterStateImpl for HitstunState {
     const NAME: &'static str = "Hitstun";
 
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if state_context.get_current_animation_frame() > self.hit_reaction.hitstun_frames {
-            match &self.hitstop_kind {
-                HitstopStateKind::Grounded => Some(FighterState::Wait(WaitState)),
-                HitstopStateKind::Airborne => Some(FighterState::Fall(FallState::new(
-                    AirborneStateCommon::default(),
-                ))),
-            }
-        } else {
-            None
-        }
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        let animation = match self.hitstop_kind {
-            HitstopStateKind::Grounded => AnimKind::FlinchGround,
-            HitstopStateKind::Airborne => AnimKind::FlinchAir,
-        };
-        state_context.play_animation(animation, false);
-        state_context.velocity.0 = FGVec2::ZERO;
-    }
-
-    fn on_exit(&mut self, state_context: &mut ExitContext) {
-        if matches!(self.hitstop_kind, HitstopStateKind::Grounded) {
-            state_context.knockback_velocity.0 = FGVec2::ZERO;
-            state_context.knockback_state.clear();
-        }
-    }
-
     fn name(&self) -> String {
         let hitstop_kind = match self.hitstop_kind {
             HitstopStateKind::Grounded => "Grounded",
@@ -87,29 +54,28 @@ impl FighterStateImpl for HitstunState {
         format!("Hitstun ({hitstop_kind}, {hit_reaction_type})")
     }
 
+    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
+        if state_context.get_current_animation_frame() > self.hit_reaction.hitstun_frames {
+            match &self.hitstop_kind {
+                HitstopStateKind::Grounded => Some(FighterState::Wait(WaitState)),
+                HitstopStateKind::Airborne => Some(FighterState::Fall(FallState::new(
+                    AirborneStateCommon::default(),
+                ))),
+            }
+        } else {
+            None
+        }
+    }
+
     fn update(&mut self, ctx: &mut UpdateContext) {
         if !self.knockback_applied {
-            let new_launch_direction = attack::directional_influence::apply_directional_influence(
+            let launch_direction = attack::directional_influence::apply_directional_influence(
-                FGVec2::ZERO,
+                ctx.input.get_last_frame().movement,
                 self.hit_reaction.launch_angle,
                 ctx.game_settings.fighter_common.di_max_angle,
             );
-            let new_knockback = new_launch_direction * self.hit_reaction.launch_velocity;
-            let combined_knockback = if self.stack_previous_knockback {
-                attack::stack_knockback(ctx.knockback_velocity.0, new_knockback)
-            } else {
-                new_knockback
-            };
-            let launch_speed = combined_knockback.length();
-            let launch_direction =
-                attack::directional_influence::apply_directional_influence_to_direction(
-                    ctx.input.get_last_frame().movement,
-                    combined_knockback.normalize_or_zero(),
-                    ctx.game_settings.fighter_common.di_max_angle,
-                );
 
-            ctx.knockback_velocity.0 = launch_direction * launch_speed;
+            ctx.knockback_velocity.0 = launch_direction * self.hit_reaction.launch_velocity;
-            ctx.knockback_state.restart();
             self.knockback_applied = true;
         }
 
@@ -117,19 +83,30 @@ impl FighterStateImpl for HitstunState {
             HitstopStateKind::Grounded => {}
             HitstopStateKind::Airborne => {
                 air::integrate_gravity(ctx.velocity, ctx.fighter_attributes, false);
-                air::apply_air_motion_with_knockback(ctx);
             }
         }
 
-        if matches!(self.hitstop_kind, HitstopStateKind::Grounded) {
+        let speed = ctx.knockback_velocity.length();
-            attack::decay_knockback(
+        let next_speed = speed
-                ctx.knockback_velocity,
+            .saturating_sub(ctx.game_settings.fighter_common.knockback_decay_per_frame)
-                ctx.knockback_state,
+            .max(FGi32::ZERO);
-                ctx.game_settings.fighter_common.knockback_decay_per_frame,
+
-            );
+        ctx.knockback_velocity.0 = ctx.knockback_velocity.normalize_or_zero() * next_speed;
+
+        ctx.translation.0 += ctx.velocity.0 + ctx.knockback_velocity.0;
     }
+
+    fn on_enter(&mut self, state_context: &mut EnterContext) {
+        let animation = match self.hitstop_kind {
+            HitstopStateKind::Grounded => AnimKind::FlinchGround,
+            HitstopStateKind::Airborne => AnimKind::FlinchAir,
+        };
+        state_context.play_animation(animation, false);
+        state_context.velocity.0 = FGVec2::ZERO;
     }
 
+    fn on_exit(&mut self, _state_context: &mut ExitContext) {}
+
     fn check_collision_interrupt(
         &mut self,
         state_context: &mut CollisionContext,
@@ -137,7 +114,7 @@ impl FighterStateImpl for HitstunState {
         match &mut self.hitstop_kind {
             HitstopStateKind::Grounded => collision_interrupt(state_context, true),
             HitstopStateKind::Airborne => {
-                air::collision_interrupt(state_context, LandingType::Normal, Default::default())
+                air::collision_interrupt(state_context, LandingType::Normal, false)
             }
         }
     }

src/fighter/state/jump.rs

@@ -1,10 +1,18 @@
+use bevy::prelude::*;
 
 use crate::{
     fighter::{
-        animation::AnimKind, state::{
+        animation::AnimKind,
-            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext, UpdateContext, air::{self, AirborneStateCommon}, ground::{self}, ground_attack,
+        state::{
+            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext,
+            UpdateContext,
+            air::{self, AirborneStateCommon},
+            air_dodge::AirDodgeState,
+            ground,
         },
-    }, input::{DigitalAction, FighterCommands},
+    },
+    input::{DigitalAction, FighterCommands},
+    math::{int::FGi32, vec::FGVec2},
 };
 #[derive(Debug, Hash, Clone, Copy)]
 pub enum JumpType {
@@ -13,30 +21,21 @@ pub enum JumpType {
     DoubleJump,
 }
 
-#[derive(Debug, Clone, Hash)]
-pub enum JumpStateInitiator {
-    Tap,
-    Button,
-}
-
 #[derive(Debug, Clone, Hash)]
 pub struct JumpState {
     pub jump_type: JumpType,
     pub airborne_state_common: AirborneStateCommon,
-    pub initiator: JumpStateInitiator,
 }
 
 #[derive(Debug, Clone, Hash)]
 pub struct JumpSquatState {
     pub duration_counter: u32,
-    pub initiator: JumpStateInitiator,
 }
 
 impl JumpSquatState {
-    pub fn create(initiator: JumpStateInitiator) -> Self {
+    pub fn create() -> Self {
         Self {
             duration_counter: 0,
-            initiator,
         }
     }
 }
@@ -45,21 +44,38 @@ impl FighterStateImpl for JumpSquatState {
     const NAME: &'static str = "JumpSquat";
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if let Some(state) = ground_attack::check_interrupt(state_context) {
-            return Some(state);
-        }
         // Special handling for wavedash from jump squat
         if state_context.input.has_command(FighterCommands::Shield) {
-            Some(ground::perform_wavedash(state_context.input, state_context.game_settings))
+            // If aiming sideways and in the deadzone, do a perfect wavedash
+            // TODO: Improve this so we don't have to go through the airborne state first
+            let mut wavedash_dir = state_context
+                .input
+                .get_last_frame()
+                .movement
+                .normalize_or_zero();
+            let movement = state_context.input.get_last_frame().movement;
+            if movement.y.is_zero() && !movement.x.is_zero() {
+                wavedash_dir.y =
+                    -state_context.game_settings.input_common.stick_deadzone - FGi32::lit("-0.01");
+                wavedash_dir.x = movement.x.signum();
+            }
+
+            if wavedash_dir == FGVec2::ZERO {
+                wavedash_dir = FGVec2::lit("0.0", "-1.0");
+            }
+
+            Some(FighterState::AirDodge(AirDodgeState {
+                direction: wavedash_dir.normalize_or_zero(),
+            }))
         } else if self.duration_counter >= state_context.fighter_attributes.jumpsquat_duration {
-            let tap_jump_held = matches!(self.initiator, JumpStateInitiator::Tap)
+            info!(
-                && state_context.input.get_last_frame().movement.y
+                "Jump {}",
-                    > state_context
+                state_context
-                        .game_settings
+                    .input
-                        .input_common
+                    .get_last_frame()
-                        .smash_input_axis_threshold;
+                    .is_held(DigitalAction::Jump)
-            let jump_type = if tap_jump_held
+            );
-                || state_context
+            let jump_type = if state_context
                 .input
                 .get_last_frame()
                 .is_held(DigitalAction::Jump)
@@ -71,7 +87,6 @@ impl FighterStateImpl for JumpSquatState {
             Some(FighterState::Jump(JumpState {
                 jump_type,
                 airborne_state_common: AirborneStateCommon::default(),
-                initiator: self.initiator.clone(),
             }))
         } else {
             None
@@ -94,13 +109,10 @@ impl FighterStateImpl for JumpSquatState {
         state_context.play_animation(AnimKind::JumpSquat, false);
         state_context.input.enable_hold_all(10);
         state_context.input.clear_command(FighterCommands::Jump);
-        state_context.input.clear_command(FighterCommands::TapJump);
     }
 
     fn on_exit(&mut self, state_context: &mut crate::fighter::state::ExitContext) {
         state_context.input.disable_hold_all();
-        // We clear tap jump here, it may have weird interactions with air dodging up
-        state_context.input.clear_command(FighterCommands::TapJump);
     }
 
     fn is_visually_grounded<'a>(&'a self) -> bool {
@@ -176,10 +188,7 @@ impl FighterStateImpl for JumpState {
         air::collision_interrupt(
             state_context,
             crate::fighter::state::land::LandingType::Normal,
-            crate::fighter::collision::AirCollisionOptions {
+            true,
-                can_pass_through_soft_platforms: true,
-                ..Default::default()
-            },
         )
     }
 
@@ -199,33 +208,20 @@ impl FighterStateImpl for JumpState {
 }
 
 pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
-    if state_context.input.has_command(FighterCommands::Jump) {
+    state_context
-        Some(FighterState::JumpSquat(JumpSquatState::create(
+        .input
-            JumpStateInitiator::Button,
+        .has_command(FighterCommands::Jump)
-        )))
+        .then(|| FighterState::JumpSquat(JumpSquatState::create()))
-    } else if state_context.input.has_command(FighterCommands::TapJump) {
-        Some(FighterState::JumpSquat(JumpSquatState::create(
-            JumpStateInitiator::Tap,
-        )))
-    } else {
-        None
-    }
 }
 
 pub fn check_input_double_jump(state_context: &InterruptContext) -> Option<FighterState> {
-    if state_context.input.has_command(FighterCommands::Jump) {
+    state_context
-        Some(FighterState::Jump(JumpState {
+        .input
+        .has_command(FighterCommands::Jump)
+        .then(|| {
+            FighterState::Jump(JumpState {
                 jump_type: JumpType::DoubleJump,
                 airborne_state_common: AirborneStateCommon::default(),
-            initiator: JumpStateInitiator::Button,
+            })
-        }))
+        })
-    } else if state_context.input.has_command(FighterCommands::TapJump) {
-        Some(FighterState::Jump(JumpState {
-            jump_type: JumpType::DoubleJump,
-            airborne_state_common: AirborneStateCommon::default(),
-            initiator: JumpStateInitiator::Tap,
-        }))
-    } else {
-        None
-    }
 }

src/fighter/state/ledge_action.rs

@@ -1,157 +0,0 @@
-use super::{CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext};
-use crate::fighter::animation::AnimKind;
-use crate::fighter::state::air::AirborneStateCommon;
-use crate::fighter::state::jump::{JumpState, JumpStateInitiator, JumpType};
-use crate::fighter::state::wait::WaitState;
-use crate::fighter::state::{FighterState, ground};
-use crate::fighter::FighterFacingDirection;
-use crate::input::FighterCommands;
-use crate::math::int::FGi32;
-use crate::math::vec::FGVec2;
-use crate::stage::line::{StageLedgeSide, StageVertexID};
-
-#[derive(Debug, Clone, Hash)]
-pub enum LedgeAction {
-    Jump(JumpStateInitiator),
-    GetUp
-}
-
-#[derive(Debug, Clone, Hash)]
-pub struct LedgeActionState {
-    pub ledge_id: StageVertexID,
-    pub ledge_action: LedgeAction,
-    pub is_in_grounded_phase: bool,
-}
-
-impl LedgeActionState {
-    pub fn create_jump(ledge_id: StageVertexID, initiator: JumpStateInitiator) -> Self {
-        LedgeActionState {
-            ledge_id,
-            ledge_action: LedgeAction::Jump(initiator),
-            is_in_grounded_phase: false,
-        }
-    }
-    pub fn create_getup(ledge_id: StageVertexID) -> Self {
-        LedgeActionState {
-            ledge_id,
-            ledge_action: LedgeAction::GetUp,
-            is_in_grounded_phase: false,
-        }
-    }
-}
-
-impl FighterStateImpl for LedgeActionState {
-    const NAME: &'static str = "LedgeAction";
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        match &self.ledge_action {
-            LedgeAction::Jump(initiator) => {
-                if state_context.is_current_animation_finished() {
-                    if state_context.input.has_command(FighterCommands::Shield) {
-                        Some(ground::perform_wavedash(state_context.input, state_context.game_settings))
-                    } else {
-                        Some(FighterState::Jump(JumpState {
-                            jump_type: JumpType::DoubleJump,
-                            airborne_state_common: AirborneStateCommon::default(),
-                            initiator: initiator.clone()
-                        }))
-                    }
-                } else {
-                    None
-                }
-            },
-            LedgeAction::GetUp => {
-                if state_context.is_current_animation_finished() {
-                    Some(FighterState::Wait(WaitState))
-                } else {
-                    None
-                }
-            },
-        }
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        match self.ledge_action {
-            LedgeAction::Jump(_) => {
-                state_context.play_animation(AnimKind::LedgeJump, false);
-                state_context.input.enable_hold_all(10);
-                state_context.input.clear_command(FighterCommands::Jump);
-                state_context.input.clear_command(FighterCommands::TapJump);
-            },
-            LedgeAction::GetUp => {
-                state_context.play_animation(AnimKind::LedgeGetUp, false);
-            },
-        }
-
-        state_context.velocity.0 = FGVec2::ZERO;
-        state_context.knockback_velocity.0 = FGVec2::ZERO;
-        state_context.knockback_state.clear();
-        let Some(ledge) = state_context.stage_collision.find_ledge_by_vertex(self.ledge_id) else {
-            return;
-        };
-        state_context.translation.0 = ledge.position;
-        *state_context.facing_direction = match ledge.hang_side {
-            StageLedgeSide::Left => FighterFacingDirection::Right,
-            StageLedgeSide::Right => FighterFacingDirection::Left,
-        };
-        if let Some(root_position) = state_context.initial_animation_root_position() {
-            state_context.translation.0 = root_position;
-        }
-        state_context.presentation_snap.0 = true;
-    }
-
-    fn update(&mut self, state_context: &mut UpdateContext) {
-        if !self.is_in_grounded_phase {
-            let root_pos = state_context.animation_root_position.unwrap_or_default();
-            let Some(ledge) = state_context.stage_collision.find_ledge_by_vertex(self.ledge_id) else {
-                return;
-            };
-
-            let ledge_pos = ledge.position;
-            let ledge_modifier = match ledge.hang_side {
-                StageLedgeSide::Left => FGi32::ONE,
-                StageLedgeSide::Right => FGi32::NEG_ONE,
-            };
-
-            let normalized_root_position = root_pos - ledge_pos;
-            let normalized_root_position = FGVec2::new(normalized_root_position.x * ledge_modifier, normalized_root_position.y);
-            
-            if normalized_root_position.x.is_positive() && normalized_root_position.y.is_positive() {
-                let Some((segment_id, _)) = state_context
-                    .stage_collision
-                    .find_ledge_ground_segment(self.ledge_id)
-                else {
-                    return;
-                };
-
-                self.is_in_grounded_phase = true;
-                state_context.translation.0 = ledge.position;
-                state_context.surface.land(segment_id, state_context.ledge_info);
-            }
-        }
-
-        if self.is_in_grounded_phase {
-            state_context.velocity.0.x = state_context.animation_root_motion_delta.x;
-            ground::apply_grounded_motion(
-                state_context.velocity,
-                state_context.translation,
-            );
-        } else {
-            if let Some(root_position) = state_context.animation_root_position {
-                state_context.translation.0 = root_position;
-            }
-        }
-
-    }
-
-    fn check_collision_interrupt(
-        &mut self,
-        state_context: &mut CollisionContext,
-    ) -> Option<FighterState> {
-        state_context.apply_desired_ecb();
-        None
-    }
-
-    fn is_visually_grounded<'a>(&'a self) -> bool {
-        self.is_in_grounded_phase
-    }
-}

src/fighter/state/ledge_grab.rs

@@ -1,75 +0,0 @@
-use super::{
-    EnterContext, FighterStateImpl, InterruptContext, UpdateContext,
-};
-use crate::fighter::{FighterFacingDirection, FighterInvulnerabilityState};
-use crate::fighter::animation::AnimKind;
-use crate::fighter::state::{ExitContext, FighterState};
-use crate::fighter::state::air::AirborneStateCommon;
-use crate::fighter::state::ledge_wait::LedgeWaitState;
-use crate::stage::line::{StageLedgeSide, StageVertexID};
-
-#[derive(Debug, Clone, Hash)]
-pub struct LedgeGrabState {
-    ledge_id: StageVertexID
-}
-
-impl LedgeGrabState {
-    pub fn new(ledge_id: StageVertexID) -> Self {
-        Self {
-            ledge_id
-        }
-    }
-}
-
-impl FighterStateImpl for LedgeGrabState {
-    const NAME: &'static str = "LedgeGrab";
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if state_context.is_current_animation_finished() {
-            Some(FighterState::LedgeWait(LedgeWaitState {
-                airborne_state_common: AirborneStateCommon::default(),
-                ledge_id: self.ledge_id.clone()
-            }))
-        } else {
-            None
-        }
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        state_context.play_animation(AnimKind::LedgeGrab, false);
-        state_context.knockback_velocity.0 = crate::math::vec::FGVec2::ZERO;
-        state_context.knockback_state.clear();
-
-        *state_context.vulnerability = FighterInvulnerabilityState::Intangible {
-            frames_remaining: None,
-        };
-
-        let Some(ledge) = state_context.stage_collision.find_ledge_by_vertex(self.ledge_id) else {
-            return;
-        };
-        state_context.translation.0 = ledge.position;
-        *state_context.facing_direction = match ledge.hang_side {
-            StageLedgeSide::Left => FighterFacingDirection::Right,
-            StageLedgeSide::Right => FighterFacingDirection::Left,
-        };
-        if let Some(root_position) = state_context.initial_animation_root_position() {
-            state_context.translation.0 = root_position;
-        }
-        state_context.presentation_snap.0 = true;
-
-
-    }
-
-    fn on_exit(&mut self, state_context: &mut ExitContext) {
-        *state_context.vulnerability = FighterInvulnerabilityState::Vulnerable;
-    }
-
-    fn is_visually_grounded<'a>(&'a self) -> bool {
-        false
-    }
-    
-    fn update(&mut self, state_context: &mut UpdateContext) {
-        if let Some(root_position) = state_context.animation_root_position {
-            state_context.translation.0 = root_position;
-        }
-    }
-}

src/fighter/state/ledge_wait.rs

@@ -1,167 +0,0 @@
-use super::{CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext};
-use crate::fighter::animation::AnimKind;
-use crate::fighter::state::air::AirborneStateCommon;
-use crate::fighter::state::fall::FallState;
-use crate::fighter::state::FighterState;
-use crate::fighter::state::jump::JumpStateInitiator;
-use crate::fighter::state::ledge_action::{LedgeActionState};
-use crate::fighter::{FighterFacingDirection, FighterInvulnerabilityState};
-use crate::input::FighterCommands;
-use crate::math::vec::FGVec2;
-use crate::stage::line::{StageLedgeSide, StageVertexID};
-
-#[derive(Debug, Clone, Hash)]
-pub struct LedgeWaitState {
-    pub airborne_state_common: AirborneStateCommon,
-    pub ledge_id: StageVertexID,
-}
-
-impl FighterStateImpl for LedgeWaitState {
-    const NAME: &'static str = "LedgeWait";
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if state_context.input.has_command(FighterCommands::Jump) {
-            return Some(FighterState::LedgeAction(LedgeActionState::create_jump(self.ledge_id, JumpStateInitiator::Button)));
-        } else if state_context.input.has_command(FighterCommands::TapJump) {
-            return Some(FighterState::LedgeAction(LedgeActionState::create_jump(self.ledge_id, JumpStateInitiator::Tap)));
-        }
-
-        if is_ledge_getup_input(state_context.input.get_last_frame().movement.x,
-            state_context.game_settings.input_common.run_stick_threshold,
-            state_context.facing_direction) {
-                return Some(FighterState::LedgeAction(LedgeActionState::create_getup(self.ledge_id)));
-        }
-
-        if is_ledge_drop_input(state_context.input.get_last_frame().movement.x,
-            state_context.game_settings.input_common.run_stick_threshold,
-            state_context.facing_direction) {
-            state_context.ledge_grab_lockout.start(
-                state_context
-                    .game_settings
-                    .fighter_common
-                    .ledge_drop_regrab_lockout_duration_frames,
-            );
-            return Some(FighterState::Fall(FallState::new(
-                AirborneStateCommon { is_fast_falling: false },
-            )));
-        }
-        if is_ledge_drop_fastfall_input(
-            state_context.input.get_last_frame().movement.y,
-            state_context.game_settings.input_common.run_stick_threshold,
-        ) {
-            state_context.ledge_grab_lockout.start(
-                state_context
-                    .game_settings
-                    .fighter_common
-                    .ledge_drop_regrab_lockout_duration_frames,
-            );
-            return Some(FighterState::Fall(FallState::new(
-                AirborneStateCommon { is_fast_falling: true },
-            )));
-        }
-
-        None
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        state_context.velocity.0 = FGVec2::ZERO;
-        state_context.knockback_velocity.0 = FGVec2::ZERO;
-        state_context.knockback_state.clear();
-        
-        if state_context.ledge_info.grab_count < state_context.game_settings.fighter_common.max_ledge_grab_count {
-            *state_context.vulnerability = FighterInvulnerabilityState::Intangible {
-                frames_remaining: Some(
-                    state_context
-                    .game_settings
-                    .fighter_common
-                    .ledge_grab_invulnerability_duration,
-                ),
-            };
-        }
-
-        state_context.ledge_info.grab_count = state_context.ledge_info.grab_count.saturating_add(1);
-        
-        let Some(ledge) = state_context.stage_collision.find_ledge_by_vertex(self.ledge_id) else {
-            return;
-        };
-        state_context.translation.0 = ledge.position;
-        *state_context.facing_direction = match ledge.hang_side {
-            StageLedgeSide::Left => FighterFacingDirection::Right,
-            StageLedgeSide::Right => FighterFacingDirection::Left,
-        };
-        state_context.play_animation(AnimKind::LedgeWait, true);
-        if let Some(root_position) = state_context.initial_animation_root_position() {
-            state_context.translation.0 = root_position;
-        }
-        state_context.presentation_snap.0 = true;
-    }
-
-    fn update(&mut self, state_context: &mut UpdateContext) {
-        if let Some(root_position) = state_context.animation_root_position {
-            state_context.translation.0 = root_position;
-        }
-    }
-
-    fn check_collision_interrupt(
-        &mut self,
-        state_context: &mut CollisionContext,
-    ) -> Option<FighterState> {
-        state_context.apply_desired_ecb();
-        None
-    }
-
-    fn is_visually_grounded<'a>(&'a self) -> bool {
-        false
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::math::int::FGi32;
-
-    #[test]
-    fn ledge_drop_uses_the_run_stick_threshold() {
-        let threshold = FGi32::lit("0.625");
-
-        assert!(is_ledge_drop_fastfall_input(FGi32::lit("-0.625"), threshold));
-        assert!(is_ledge_drop_fastfall_input(FGi32::lit("-1.0"), threshold));
-        assert!(!is_ledge_drop_fastfall_input(FGi32::lit("-0.624"), threshold));
-    }
-}
-
-fn is_ledge_drop_fastfall_input(
-    vertical_input: crate::math::int::FGi32,
-    threshold: crate::math::int::FGi32,
-) -> bool {
-    vertical_input <= -threshold
-}
-
-fn is_ledge_drop_input(
-    horizontal_input: crate::math::int::FGi32,
-    threshold: crate::math::int::FGi32,
-    facing_dir: &FighterFacingDirection,
-) -> bool {
-    let dir = facing_dir.to_sign();
-    if horizontal_input.abs() > threshold {
-        if dir != horizontal_input.signum() {
-            return true;
-        }
-    }
-
-    false
-}
-
-fn is_ledge_getup_input(
-    horizontal_input: crate::math::int::FGi32,
-    threshold: crate::math::int::FGi32,
-    facing_dir: &FighterFacingDirection,
-) -> bool {
-    let dir = facing_dir.to_sign();
-    if horizontal_input.abs() > threshold {
-        if dir == horizontal_input.signum() {
-            return true;
-        }
-    }
-
-    false
-}

src/fighter/state/mod.rs

@@ -7,12 +7,12 @@ use bevy::prelude::*;
 
 use crate::fighter::animation::{AnimKind, FighterAnimationFrame};
 use crate::fighter::attack::{
-    FighterAttackScriptAssets, FighterKnockbackState, FighterKnockbackVelocity,
+    FighterAttackScriptAssets, FighterKnockbackVelocity, FighterPendingHitReaction,
-    FighterPendingHitReaction, FighterStaleMoveQueue, HitStop,
+    FighterStaleMoveQueue, HitStop,
 };
 use crate::fighter::attributes::FighterAttributes;
-use crate::fighter::baked_animation::{BakedFighterAnimations, FighterBoneMatrices};
+use crate::fighter::baked_animation::BakedFighterAnimations;
-use crate::fighter::ecb::{self, FighterDesiredECB, FighterPreviousECB};
+use crate::fighter::ecb::FighterPreviousECB;
 use crate::fighter::manifest::FighterManifest;
 use crate::fighter::state::hitstun::HitstunState;
 use crate::fighter::surface::EcbLockPolicy;
@@ -20,18 +20,15 @@ use crate::fighter::visual::FighterAnimations;
 use crate::fighter::{
     Fighter, FighterDamage, FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop,
     FighterHitstopShake, FighterHitstopShakeKind, FighterHitstopShakeRole,
-    FighterInvulnerabilityState, FighterLedgeInformation, FighterPendingRespawn,
+    FighterInvulnerabilityState, FighterPendingRespawn, FighterPresentationSnap,
-    FighterPresentationSnap, FighterPreviousTranslation, FighterSurfaceState, FighterTranslation,
+    FighterPreviousTranslation, FighterSurfaceState, FighterTranslation, FighterVelocity,
-    FighterVelocity,
 };
 use crate::game_settings::GameSettings;
 use crate::input::FighterInput;
 use crate::match_loading::MatchConfig;
 use crate::match_runtime::MatchState;
 use crate::math::int::FGi32;
-use crate::math::rect::FGRect;
 use crate::math::vec::FGVec2;
-use crate::math::vec3::FGVec3;
 use crate::player::Player;
 use crate::scripting::FighterAttackScript;
 use crate::stage::line::StageCollision;
@@ -49,9 +46,6 @@ pub mod ground_attack;
 pub mod hitstun;
 pub mod jump;
 pub mod land;
-pub mod ledge_action;
-pub mod ledge_grab;
-pub mod ledge_wait;
 pub mod platform_pass;
 pub mod run;
 pub mod turn;
@@ -120,9 +114,8 @@ pub trait FighterStateImpl: Sized {
 
     fn check_collision_interrupt(
         &mut self,
-        state_context: &mut CollisionContext,
+        _state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        state_context.apply_desired_ecb();
         None
     }
 
@@ -141,7 +134,6 @@ pub struct AnimationStatus {
 pub struct InterruptContext<'a> {
     pub input: &'a FighterInput,
     pub facing_direction: &'a mut FighterFacingDirection,
-    pub ledge_grab_lockout: &'a mut FighterLedgeInformation,
     pub game_settings: &'a GameSettings,
     pub fighter_attributes: &'a FighterAttributes,
     pub surface: &'a FighterSurfaceState,
@@ -165,48 +157,26 @@ pub struct EnterContext<'a> {
     pub input: &'a mut FighterInput,
     pub hitboxes: &'a mut FighterHitboxes,
     pub velocity: &'a mut FighterVelocity,
-    pub translation: &'a mut FighterTranslation,
     pub knockback_velocity: &'a mut FighterKnockbackVelocity,
-    pub knockback_state: &'a mut FighterKnockbackState,
     pub stale_move_queue: &'a mut FighterStaleMoveQueue,
     pub facing_direction: &'a mut FighterFacingDirection,
     pub animation_frame: &'a mut FighterAnimationFrame,
-    pub presentation_snap: &'a mut FighterPresentationSnap,
     pub surface: &'a mut FighterSurfaceState,
     pub vulnerability: &'a mut FighterInvulnerabilityState,
-    pub ledge_info: &'a mut FighterLedgeInformation,
     pub fighter_attributes: &'a FighterAttributes,
     pub attack_script_assets: &'a FighterAttackScriptAssets,
     pub game_settings: &'a GameSettings,
-    pub stage_collision: &'a StageCollision,
-    baked_animations: &'a BakedFighterAnimations,
-    model_scale: FGi32,
 }
 
 impl EnterContext<'_> {
     pub fn play_animation(&mut self, kind: AnimKind, repeat: bool) {
         self.animation_frame.reset(kind, repeat);
     }
-
-    /// World-space root position authored for frame zero of the animation most
-    /// recently selected with [`Self::play_animation`].
-    pub fn initial_animation_root_position(&self) -> Option<FGVec2> {
-        let position = self
-            .baked_animations
-            .initial_root_position(self.animation_frame.kind, self.model_scale)?;
-        Some(self.translation.0 + animation_position_to_gameplay(position, self.facing_direction))
-    }
-
-    pub fn get_animation_duration(&self, kind: AnimKind) -> Option<usize> {
-        self.baked_animations.get_animation_duration(kind)
-    }
 }
 
 pub struct ExitContext<'a> {
     pub input: &'a mut FighterInput,
     pub hitboxes: &'a mut FighterHitboxes,
-    pub knockback_velocity: &'a mut FighterKnockbackVelocity,
-    pub knockback_state: &'a mut FighterKnockbackState,
     pub surface: &'a mut FighterSurfaceState,
     pub vulnerability: &'a mut FighterInvulnerabilityState,
 }
@@ -219,29 +189,13 @@ pub struct UpdateContext<'a> {
     pub velocity: &'a mut FighterVelocity,
     pub surface: &'a mut FighterSurfaceState,
     pub knockback_velocity: &'a mut FighterKnockbackVelocity,
-    pub knockback_state: &'a mut FighterKnockbackState,
     pub vulnerability: &'a mut FighterInvulnerabilityState,
-    pub ledge_info: &'a mut FighterLedgeInformation,
     pub game_settings: &'a GameSettings,
-    /// Root motion in the fighter's gameplay plane: X is world-right and Y is
-    /// world-up. Animation +Z is forward and is mirrored by facing direction.
-    pub animation_root_motion_delta: FGVec2,
-    /// Current world-space root position implied by this animation frame.
-    /// States opt into root motion by assigning this to [`FighterTranslation`].
-    pub animation_root_position: Option<FGVec2>,
     pub animation_frame: u32,
     pub fighter_attributes: &'a FighterAttributes,
     pub attack_scripts: &'a Assets<FighterAttackScript>,
     pub attack_script_assets: &'a FighterAttackScriptAssets,
     pub facing_direction: &'a FighterFacingDirection,
-    pub stage_collision: &'a StageCollision,
-}
-
-fn animation_position_to_gameplay(
-    position: FGVec3,
-    facing_direction: &FighterFacingDirection,
-) -> FGVec2 {
-    FGVec2::new(position.z * facing_direction.to_sign(), position.y)
 }
 
 impl UpdateContext<'_> {
@@ -255,55 +209,31 @@ pub struct CollisionContext<'a> {
     pub prev_translation: &'a FighterPreviousTranslation,
     pub input: &'a FighterInput,
     pub velocity: &'a mut FighterVelocity,
-    pub knockback_velocity: &'a mut FighterKnockbackVelocity,
-    pub knockback_state: &'a mut FighterKnockbackState,
     pub surface: &'a mut FighterSurfaceState,
     pub ecb: &'a mut FighterECB,
-    pub desired_ecb: &'a mut FighterDesiredECB,
     pub prev_ecb: &'a FighterPreviousECB,
     pub stage_collision: &'a StageCollision,
     pub leave_ground_ecb_lock_duration: u32,
     pub presentation_snap: &'a mut FighterPresentationSnap,
-    pub ledge_info: &'a mut FighterLedgeInformation,
-    pub fighter_ledge_collision_box: FGRect,
     pub downward_stick_threshold: FGi32,
-    pub waveland_snap_distance: FGi32,
 }
 
 impl CollisionContext<'_> {
-    /// Commit the target pose before resolving this frame. The collision
-    /// substep resolver can later replace this with fractional steps.
-    pub fn apply_desired_ecb(&mut self) {
-        ecb::interpolate_ecb(self.ecb, *self.desired_ecb, FGi32::ONE);
-    }
-
     pub fn air_collide_with_stage(
-        &mut self,
+        &self,
-        mut options: crate::fighter::collision::AirCollisionOptions,
+        can_ignore_soft_platforms: bool,
     ) -> Option<crate::fighter::collision::AirCollisionWithStageResult> {
         let ignored_polys = self.surface.ignored_polygon_ids();
-        options.can_pass_through_soft_platforms = options.can_pass_through_soft_platforms
+        let ignore_soft_platforms = can_ignore_soft_platforms
             && self.input.get_last_frame().movement.y <= -self.downward_stick_threshold;
-        crate::fighter::collision::air_collide_with_stage_substepped(
+        crate::fighter::collision::air_collide_with_stage(
             self.prev_translation,
             self.translation,
-            self.velocity,
+            self.prev_ecb,
             self.ecb,
-            self.desired_ecb,
             self.stage_collision,
             &ignored_polys,
-            options,
+            ignore_soft_platforms,
-        )
-    }
-    pub fn air_collide_with_ledges(
-        &self,
-    ) -> Option<crate::fighter::collision::AirCollisionWithLedgeResult> {
-        if self.ledge_info.is_regrab_lockout_active() {
-            return None;
-        }
-        crate::fighter::collision::air_collide_with_ledges(
-            &self.fighter_ledge_collision_box,
-            self.stage_collision,
         )
     }
 }
@@ -319,9 +249,6 @@ fighter_states! {
     JumpSquat => jump::JumpSquatState,
     Jump => jump::JumpState,
     Land => land::LandingState,
-    LedgeWait => ledge_wait::LedgeWaitState,
-    LedgeAction => ledge_action::LedgeActionState,
-    LedgeGrab => ledge_grab::LedgeGrabState,
     AirDodge => air_dodge::AirDodgeState,
     Turn => turn::TurnState,
     GroundAttack => ground_attack::GroundAttackState,
@@ -341,17 +268,13 @@ pub struct FighterFrameQuery {
     pub velocity: &'static mut FighterVelocity,
     pub surface: &'static mut FighterSurfaceState,
     pub knockback_velocity: &'static mut FighterKnockbackVelocity,
-    pub knockback_state: &'static mut FighterKnockbackState,
     pub stale_move_queue: &'static mut FighterStaleMoveQueue,
     pub ecb: &'static mut FighterECB,
-    pub desired_ecb: &'static mut FighterDesiredECB,
     pub prev_ecb: &'static FighterPreviousECB,
     pub facing_direction: &'static mut FighterFacingDirection,
     pub animation_frame: &'static mut FighterAnimationFrame,
     pub vulnerability: &'static mut FighterInvulnerabilityState,
-    pub ledge_information: &'static mut FighterLedgeInformation,
     pub fighter: &'static Fighter,
-    pub bone_matrices: &'static FighterBoneMatrices,
 }
 
 impl<'w, 's> FighterFrameQueryItem<'w, 's> {
@@ -385,7 +308,6 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         InterruptContext {
             input: &self.input,
             facing_direction: &mut self.facing_direction,
-            ledge_grab_lockout: &mut self.ledge_information,
             game_settings,
             fighter_attributes: attributes,
             animation,
@@ -401,30 +323,20 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         attributes: &'a FighterAttributes,
         attack_script_assets: &'a FighterAttackScriptAssets,
         game_settings: &'a GameSettings,
-        stage_collision: &'a StageCollision,
-        baked_animations: &'a BakedFighterAnimations,
-        model_scale: FGi32,
     ) -> EnterContext<'a> {
         EnterContext {
             input: &mut self.input,
             hitboxes: &mut self.hitboxes,
             velocity: &mut self.velocity,
             knockback_velocity: &mut self.knockback_velocity,
-            knockback_state: &mut self.knockback_state,
-            translation: &mut self.translation,
             stale_move_queue: &mut self.stale_move_queue,
             facing_direction: &mut self.facing_direction,
             animation_frame: &mut self.animation_frame,
             surface: &mut self.surface,
             vulnerability: &mut self.vulnerability,
-            presentation_snap: &mut self.presentation_snap,
-            ledge_info: &mut self.ledge_information,
             fighter_attributes: attributes,
             attack_script_assets,
             game_settings,
-            stage_collision,
-            baked_animations,
-            model_scale,
         }
     }
 
@@ -432,8 +344,6 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         ExitContext {
             input: &mut self.input,
             hitboxes: &mut self.hitboxes,
-            knockback_velocity: &mut self.knockback_velocity,
-            knockback_state: &mut self.knockback_state,
             surface: &mut self.surface,
             vulnerability: &mut self.vulnerability,
         }
@@ -445,16 +355,7 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         attributes: &'a FighterAttributes,
         attack_scripts: &'a Assets<FighterAttackScript>,
         attack_script_assets: &'a FighterAttackScriptAssets,
-        stage_collision: &'a StageCollision,
     ) -> UpdateContext<'a> {
-        let animation_root_motion_delta = animation_position_to_gameplay(
-            self.bone_matrices.root_motion_delta(),
-            &self.facing_direction,
-        );
-        let animation_root_position = self
-            .bone_matrices
-            .root_motion_position()
-            .map(|_| self.translation.0 + animation_root_motion_delta);
         UpdateContext {
             translation: &mut self.translation,
             prev_translation: &mut self.prev_translation,
@@ -463,51 +364,35 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             velocity: &mut self.velocity,
             surface: &mut self.surface,
             knockback_velocity: &mut self.knockback_velocity,
-            knockback_state: &mut self.knockback_state,
             game_settings,
-            animation_root_motion_delta,
-            animation_root_position,
             animation_frame: self.animation_frame.frame,
             vulnerability: &mut self.vulnerability,
-            ledge_info: &mut self.ledge_information,
             fighter_attributes: attributes,
             attack_scripts,
             attack_script_assets,
             facing_direction: &self.facing_direction,
-            stage_collision: &stage_collision,
         }
     }
 
     fn collision_context<'a>(
         &'a mut self,
         stage_collision: &'a StageCollision,
-        fighter_manifest: &'a FighterManifest,
         game_settings: &'a GameSettings,
     ) -> CollisionContext<'a> {
-        let fighter_ledge_collision_box = FGRect {
-            origin: self.translation.0 + fighter_manifest.ledge_grab_box_start,
-            end: self.translation.0 + fighter_manifest.ledge_grab_box_end,
-        };
         CollisionContext {
             translation: &mut self.translation,
             prev_translation: &self.prev_translation,
             presentation_snap: &mut self.presentation_snap,
             input: &self.input,
             velocity: &mut self.velocity,
-            knockback_velocity: &mut self.knockback_velocity,
-            knockback_state: &mut self.knockback_state,
             surface: &mut self.surface,
             ecb: &mut self.ecb,
-            desired_ecb: &mut self.desired_ecb,
-            ledge_info: &mut self.ledge_information,
             prev_ecb: &self.prev_ecb,
             stage_collision,
             leave_ground_ecb_lock_duration: game_settings
                 .fighter_common
                 .leave_ground_ecb_frame_lock_duration,
             downward_stick_threshold: game_settings.input_common.run_stick_threshold,
-            fighter_ledge_collision_box,
-            waveland_snap_distance: game_settings.fighter_common.waveland_snap_distance,
         }
     }
 }
@@ -531,7 +416,6 @@ pub struct StatefulFighterQuery {
 pub fn state_update_system(
     mut query: Query<StatefulFighterQuery>,
     game_settings: Res<GameSettings>,
-    stage_collision: Res<StageCollision>,
     attack_scripts: Res<Assets<FighterAttackScript>>,
     manifests: Res<Assets<FighterManifest>>,
 ) {
@@ -555,7 +439,6 @@ pub fn state_update_system(
             &manifest.attributes,
             &attack_scripts,
             &fighter.attack_script_assets,
-            &stage_collision,
         );
         state.update(&mut update_ctx);
     }
@@ -567,10 +450,7 @@ fn transition_state(
     frame: &mut FighterFrameQueryItem,
     attributes: &FighterAttributes,
     attack_script_assets: &FighterAttackScriptAssets,
-    stage_collision: &StageCollision,
     game_settings: &GameSettings,
-    baked_animations: &BakedFighterAnimations,
-    model_scale: FGi32,
 ) {
     let old_name = current.name();
     let new_name = next.name();
@@ -584,14 +464,7 @@ fn transition_state(
                 .leave_ground_ecb_frame_lock_duration,
         );
     }
-    next.on_enter(&mut frame.enter_context(
+    next.on_enter(&mut frame.enter_context(attributes, attack_script_assets, game_settings));
-        attributes,
-        attack_script_assets,
-        game_settings,
-        stage_collision,
-        baked_animations,
-        model_scale,
-    ));
     *current = next;
     info!("{} -> {}", old_name, new_name);
 }
@@ -619,14 +492,11 @@ pub fn state_interrupt_system(
         let manifest = fighter_manifests
             .get(&fighter.manifest)
             .expect("Fighter manifest should be valid");
-        let baked = baked_animations
-            .get(&animations.baked)
-            .expect("Animation should exist");
 
         let new_state = if let Some(reaction) = pending_hit_reaction.take() {
-            hitstop.remaining_frames = *reaction.victim_hitstop_frames;
+            hitstop.remaining_frames = *reaction.hitstop_frames;
             let shake_frames = reaction
-                .victim_hitstop_frames
+                .hitstop_frames
                 .calculate_shake_frames(&game_settings);
             hitstop_shake.role = FighterHitstopShakeRole::Receiver;
             hitstop_shake.total_frames = shake_frames;
@@ -645,7 +515,7 @@ pub fn state_interrupt_system(
 
             if let hitstun::HitstopStateKind::Grounded = hitstop_kind {
                 let straight_up_angle = FGi32::lit("90.0");
-                if reaction.victim_hitstop_frames
+                if reaction.hitstop_frames
                     >= HitStop::new(game_settings.fighter_common.tumble_bounce_hitstop_threshold)
                 {
                     hitstop_kind = hitstun::HitstopStateKind::Airborne;
@@ -668,16 +538,9 @@ pub fn state_interrupt_system(
             }
 
             info!("Entering hitstop kind: {:?}", hitstop_kind);
-            let stack_previous_knockback = !frame.surface.is_grounded()
-                && !frame.knockback_velocity.0.length_squared().is_zero()
-                && frame
-                    .knockback_state
-                    .can_stack(game_settings.fighter_common.knockback_stacking_window);
-
             Some(FighterState::Hitstun(HitstunState::new(
                 reaction,
                 hitstop_kind,
-                stack_previous_knockback,
             )))
         } else if hitstop.remaining_frames > 0 {
             None
@@ -700,10 +563,7 @@ pub fn state_interrupt_system(
                 &mut frame,
                 &manifest.attributes,
                 attack_script_assets,
-                &stage_collision,
                 &game_settings,
-                baked,
-                manifest.model_scale,
             );
         };
     }
@@ -718,7 +578,6 @@ pub fn state_collision_interrupt_system(
     mut match_state: ResMut<MatchState>,
     stage_registry: Res<StageManifestRegistry>,
     stage_manifests: Res<Assets<StageManifest>>,
-    baked_animations: Res<Assets<BakedFighterAnimations>>,
 ) {
     let Some(stage_manifest_handle) = stage_registry.get(match_config.stage) else {
         return;
@@ -733,7 +592,6 @@ pub fn state_collision_interrupt_system(
             mut state,
             mut frame,
             fighter,
-            animations,
             attack_script_assets,
             mut hitstop,
             mut pending_respawn,
@@ -745,9 +603,6 @@ pub fn state_collision_interrupt_system(
         let manifest = fighter_manifests
             .get(&fighter.manifest)
             .expect("Fighter manifest should be valid");
-        let baked = baked_animations
-            .get(&animations.baked)
-            .expect("Animation should exist");
 
         if pending_respawn.0 {
             **pending_respawn = false;
@@ -773,8 +628,6 @@ pub fn state_collision_interrupt_system(
 
             // Clear hitstop
             hitstop.remaining_frames = 0;
-            frame.knockback_velocity.0 = FGVec2::ZERO;
-            frame.knockback_state.clear();
 
             // subtract one stock
 
@@ -789,9 +642,6 @@ pub fn state_collision_interrupt_system(
 
             // reset percentage
             *damage = FighterDamage::default();
-            // reset ledge
-
-            *frame.ledge_information = FighterLedgeInformation::default();
 
             transition_state(
                 &mut state,
@@ -799,10 +649,7 @@ pub fn state_collision_interrupt_system(
                 &mut frame,
                 &manifest.attributes,
                 attack_script_assets,
-                &stage_collision,
                 &game_settings,
-                baked,
-                manifest.model_scale,
             );
             continue;
         }
@@ -812,7 +659,7 @@ pub fn state_collision_interrupt_system(
         }
 
         let new_state = state.check_collision_interrupt(
-            &mut frame.collision_context(&stage_collision, manifest, &game_settings),
+            &mut frame.collision_context(&stage_collision, &game_settings),
         );
         if let Some(new_state) = new_state {
             transition_state(
@@ -821,97 +668,8 @@ pub fn state_collision_interrupt_system(
                 &mut frame,
                 &manifest.attributes,
                 &attack_script_assets,
-                &stage_collision,
                 &game_settings,
-                baked,
-                manifest.model_scale,
             );
         }
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::fighter::ecb::FighterPreviousECB;
-    use crate::stage::line::{StageLedge, StageLedgeSide, StageVertexID};
-
-    #[test]
-    fn animation_positions_map_forward_to_facing_and_preserve_height() {
-        let position = FGVec3::lit("99", "3", "5");
-
-        assert_eq!(
-            animation_position_to_gameplay(position, &FighterFacingDirection::Right),
-            FGVec2::lit("5", "3")
-        );
-        assert_eq!(
-            animation_position_to_gameplay(position, &FighterFacingDirection::Left),
-            FGVec2::lit("-5", "3")
-        );
-    }
-
-    #[test]
-    fn ledge_lockout_suppresses_ledge_collision() {
-        let ledge_id = StageVertexID {
-            polygon: 0,
-            vertex: 0,
-        };
-        let stage_collision = StageCollision {
-            ledges: vec![StageLedge {
-                id: ledge_id,
-                position: FGVec2::ZERO,
-                hang_side: StageLedgeSide::Left,
-            }],
-            ..default()
-        };
-        let previous_translation = FighterPreviousTranslation::default();
-        let input = FighterInput::default();
-        let mut translation = FighterTranslation::default();
-        let mut velocity = FighterVelocity::default();
-        let mut knockback_velocity = FighterKnockbackVelocity::default();
-        let mut knockback_state = FighterKnockbackState::default();
-        let mut surface = FighterSurfaceState::default();
-        let mut ecb = FighterECB::default();
-        let mut desired_ecb = FighterDesiredECB {
-            top: FGVec2::lit("0", "2"),
-            bottom: FGVec2::ZERO,
-            left: FGVec2::lit("-1", "1"),
-            right: FGVec2::lit("1", "1"),
-        };
-        let mut ledge_info = FighterLedgeInformation {
-            regrab_lockout_remaining_frames: 5,
-            ..default()
-        };
-        let previous_ecb = FighterPreviousECB::from(ecb);
-        let mut presentation_snap = FighterPresentationSnap::default();
-        let context = CollisionContext {
-            translation: &mut translation,
-            prev_translation: &previous_translation,
-            input: &input,
-            velocity: &mut velocity,
-            knockback_velocity: &mut knockback_velocity,
-            knockback_state: &mut knockback_state,
-            surface: &mut surface,
-            ecb: &mut ecb,
-            desired_ecb: &mut desired_ecb,
-            ledge_info: &mut ledge_info,
-            prev_ecb: &previous_ecb,
-            stage_collision: &stage_collision,
-            leave_ground_ecb_lock_duration: 0,
-            presentation_snap: &mut presentation_snap,
-            fighter_ledge_collision_box: FGRect {
-                origin: FGVec2::lit("-1", "1"),
-                end: FGVec2::lit("1", "-1"),
-            },
-            downward_stick_threshold: FGi32::ONE,
-            waveland_snap_distance: FGi32::ZERO,
-        };
-
-        assert!(context.air_collide_with_ledges().is_none());
-        context.ledge_info.regrab_lockout_remaining_frames = 0;
-        assert_eq!(
-            context.air_collide_with_ledges().map(|result| result.ledge),
-            Some(ledge_id)
-        );
-    }
-}

src/fighter/state/platform_pass.rs

@@ -46,10 +46,7 @@ impl FighterStateImpl for PlatformPassState {
         air::collision_interrupt(
             state_context,
             crate::fighter::state::land::LandingType::Normal,
-            crate::fighter::collision::AirCollisionOptions {
+            true,
-                can_pass_through_soft_platforms: true,
-                ..Default::default()
-            },
         )
     }
     

src/fighter/state/run.rs

@@ -48,6 +48,7 @@ impl FighterStateImpl for RunState {
         ground::apply_grounded_motion(
             state_context.velocity,
             state_context.translation,
+            state_context.prev_translation,
         );
     }
 

src/fighter/state/walk.rs

@@ -40,6 +40,7 @@ impl FighterStateImpl for WalkState {
         ground::apply_grounded_motion(
             state_context.velocity,
             state_context.translation,
+            state_context.prev_translation,
         );
     }
 

src/fighter/surface.rs

@@ -1,6 +1,6 @@
 use bevy::prelude::*;
 
-use crate::{fighter::FighterLedgeInformation, stage::line::StageLineID};
+use crate::stage::line::StageLineID;
 
 #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
 pub enum EcbLockPolicy {
@@ -53,9 +53,8 @@ impl FighterSurfaceState {
         }
     }
 
-    pub(crate) fn land(&mut self, line_id: StageLineID, ledge_info: &mut FighterLedgeInformation) {
+    pub(crate) fn land(&mut self, line_id: StageLineID) {
         *self = Self::Grounded { line_id };
-        ledge_info.grab_count = 0;
     }
 
     pub fn clear_polygon_ignore(&mut self, polygon: usize) {
@@ -152,11 +151,7 @@ mod tests {
             polygon: 2,
             segment: 3,
         };
-        let mut ledge_info = FighterLedgeInformation {
+        surface.land(line_id);
-            regrab_lockout_remaining_frames: 0,
-            grab_count: 0,
-        };
-        surface.land(line_id, &mut ledge_info);
         assert!(surface.is_grounded());
         assert_eq!(surface.line_id(), Some(line_id));
 
@@ -225,11 +220,8 @@ mod tests {
         surface.ignore_polygon(3, 5);
         surface.apply_airborne_policy(EcbLockPolicy::Restart, 2);
         assert!(surface.is_polygon_ignored(3));
-        let mut ledge_info = FighterLedgeInformation {
+
-            regrab_lockout_remaining_frames: 0,
+        surface.land(StageLineID { polygon: 0, segment: 0 });
-            grab_count: 0,
-        };
-        surface.land(StageLineID { polygon: 0, segment: 0 }, &mut ledge_info);
         assert!(!surface.is_polygon_ignored(3));
     }
 }

src/game_settings.rs

@@ -10,15 +10,11 @@ use crate::{math::int::FGi32, menus::style::FGUiStyle};
 pub struct FighterSettingsCommon {
     pub walk_speed_ease: FGi32,
 
-    /// Horizontal position nudge applied to each overlapping grounded fighter.
-    pub grounded_push_nudge: FGi32,
-
     /// Maximum allowed horizontal velocity
     pub ground_max_horizontal_velocity: FGi32,
 
     /// Ground friction applied when the fighter is above the walk speed
     pub ground_friction_over_walk_speed_multiplier: FGi32,
-    /// Minimum active launch frames between hits before airborne knockback stacks.
     pub knockback_stacking_window: u32,
     pub knockback_decay_per_frame: FGi32,
 
@@ -52,13 +48,6 @@ pub struct FighterSettingsCommon {
 
     pub angel_platform_invulnerability_duration: u32,
 
-    /// Frames during which a fighter cannot grab any ledge after dropping from one.
-    pub ledge_drop_regrab_lockout_duration_frames: u32,
-    /// How many frames (+ the ledge animation duration) the fighter will be invulnerable after grabbing the ledge
-    pub ledge_grab_invulnerability_duration: u32,
-    /// How many times the fighter can grab the ledge without landing and still get invulnerability
-    pub max_ledge_grab_count: u32,
-
     /// When hit while the receiver is in the air, use this angle
     pub sakurai_angle_aerial_angle: FGi32,
     /// When hit while the receiver is in the ground and at low knockback, use this angle
@@ -67,8 +56,6 @@ pub struct FighterSettingsCommon {
     pub sakurai_angle_high_knockback_angle: FGi32,
     /// past this threshold, the knockback is considered high, so it will use [sakurai_angle_high_knockback_angle]
     pub sakurai_angle_knockback_threshold: FGi32,
-
-    pub waveland_snap_distance: FGi32,
 }
 #[derive(Reflect, Serialize, Deserialize, Clone)]
 #[reflect(opaque)]

src/hitbox_viewer/mod.rs

@@ -10,7 +10,6 @@ use bevy::{
     world_serialization::WorldAssetRoot,
 };
 use bevy_egui::{EguiContexts, EguiPrimaryContextPass, egui};
-use bevy_ggrs::SnapshotPlugin;
 use clap::{Parser, ValueEnum};
 use egui_extras::Column;
 use itertools::Itertools;
@@ -42,7 +41,6 @@ pub enum ViewerAttack {
     UpSmash,
     DownSmash,
     ForwardSmash,
-    DashAttack,
 }
 
 impl From<ViewerAttack> for AttackKind {
@@ -60,7 +58,6 @@ impl From<ViewerAttack> for AttackKind {
             ViewerAttack::UpSmash => Self::UpSmash,
             ViewerAttack::DownSmash => Self::DownSmash,
             ViewerAttack::ForwardSmash => Self::ForwardSmash,
-            ViewerAttack::DashAttack => Self::DashAttack,
         }
     }
 }
@@ -103,7 +100,7 @@ struct ViewerState {
     manifest_path: String,
 }
 
-const VIEWER_ATTACKS: [AttackKind; 13] = [
+const VIEWER_ATTACKS: [AttackKind; 12] = [
     AttackKind::NeutralAir,
     AttackKind::ForwardAir,
     AttackKind::BackAir,
@@ -116,7 +113,6 @@ const VIEWER_ATTACKS: [AttackKind; 13] = [
     AttackKind::UpSmash,
     AttackKind::DownSmash,
     AttackKind::ForwardSmash,
-    AttackKind::DashAttack,
 ];
 
 pub struct HitboxViewerPlugin;
@@ -132,7 +128,6 @@ impl Plugin for HitboxViewerPlugin {
             )
         };
         app.add_plugins((
-            SnapshotPlugin,
             GameAssetPlugin,
             FighterScriptImportPlugin,
             BakedAnimationAssetProcessingPlugin,

src/input/buffer.rs

@@ -9,8 +9,6 @@ use crate::fighter::FighterFacingDirection;
 use crate::fighter::attack::AttackKind;
 use crate::game_settings::GameSettings;
 use crate::input::{DigitalAction, FighterInputFrame};
-use crate::math::int::FGi32;
-use crate::math::vec::FGVec2;
 use crate::netcode::GGRSCfg;
 use crate::player::Player;
 
@@ -24,7 +22,6 @@ pub enum FighterCommands {
     SmashMoveDown,
     SmashMoveLeft,
     SmashMoveRight,
-    TapJump,
 }
 
 pub(crate) fn second_binding_pressed(
@@ -35,7 +32,7 @@ pub(crate) fn second_binding_pressed(
 }
 
 impl FighterCommands {
-    pub const COUNT: usize = 9;
+    pub const COUNT: usize = 8;
 
     pub const fn index(self) -> usize {
         match self {
@@ -47,7 +44,6 @@ impl FighterCommands {
             Self::SmashMoveDown => 5,
             Self::SmashMoveLeft => 6,
             Self::SmashMoveRight => 7,
-            Self::TapJump => 8,
         }
     }
 }
@@ -66,34 +62,6 @@ pub enum FighterAttackCommandType {
     TiltAttackRight,
 }
 
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
-pub enum FlickDirection {
-    Up,
-    Down,
-    Left,
-    Right,
-}
-
-impl FlickDirection {
-    const fn smash_move_command(self) -> FighterCommands {
-        match self {
-            Self::Up => FighterCommands::SmashMoveUp,
-            Self::Down => FighterCommands::SmashMoveDown,
-            Self::Left => FighterCommands::SmashMoveLeft,
-            Self::Right => FighterCommands::SmashMoveRight,
-        }
-    }
-
-    const fn smash_attack_command(self) -> FighterAttackCommandType {
-        match self {
-            Self::Up => FighterAttackCommandType::SmashAttackUp,
-            Self::Down => FighterAttackCommandType::SmashAttackDown,
-            Self::Left => FighterAttackCommandType::SmashAttackLeft,
-            Self::Right => FighterAttackCommandType::SmashAttackRight,
-        }
-    }
-}
-
 impl FighterAttackCommandType {
     pub fn to_attack_kind_grounded(&self) -> AttackKind {
         match self {
@@ -223,149 +191,6 @@ impl ButtonHistory {
     }
 }
 
-#[derive(Clone, Copy, Debug, Hash)]
-struct FlickAxisState {
-    age: u8,
-    eligible: bool,
-    consumed: bool,
-    command_emitted: bool,
-}
-
-impl Default for FlickAxisState {
-    fn default() -> Self {
-        Self {
-            age: u8::MAX,
-            eligible: false,
-            consumed: false,
-            command_emitted: false,
-        }
-    }
-}
-
-impl FlickAxisState {
-    fn update(
-        &mut self,
-        current: FGi32,
-        previous: FGi32,
-        reset_threshold: FGi32,
-        axis_threshold: FGi32,
-        frame_threshold: u8,
-    ) {
-        if current.abs() < reset_threshold {
-            *self = Self::default();
-            return;
-        }
-
-        if previous.abs() < reset_threshold || previous.signum() != current.signum() {
-            self.age = 1;
-            self.consumed = false;
-            self.command_emitted = false;
-        } else {
-            self.age = self.age.saturating_add(1);
-        }
-
-        self.eligible =
-            !self.consumed && current.abs() >= axis_threshold && self.age <= frame_threshold;
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default, Hash)]
-struct StickFlickState {
-    x: FlickAxisState,
-    y: FlickAxisState,
-}
-
-impl StickFlickState {
-    fn update(
-        &mut self,
-        current: FGVec2,
-        previous: FGVec2,
-        reset_threshold: FGi32,
-        axis_threshold: FGi32,
-        frame_threshold: u8,
-    ) {
-        self.x.update(
-            current.x,
-            previous.x,
-            reset_threshold,
-            axis_threshold,
-            frame_threshold,
-        );
-        self.y.update(
-            current.y,
-            previous.y,
-            reset_threshold,
-            axis_threshold,
-            frame_threshold,
-        );
-    }
-
-    fn peek(&self, value: FGVec2) -> Option<FlickDirection> {
-        self.resolve(value, self.x.eligible, self.y.eligible)
-    }
-
-    /// Returns each axis that has not produced a passive command during this
-    /// gesture. This does not consume the flick, so an attack can still use
-    /// the remainder of its smash-input window.
-    fn next_commands(&mut self, value: FGVec2) -> [Option<FlickDirection>; 2] {
-        let use_x = self.x.eligible && !self.x.command_emitted;
-        let use_y = self.y.eligible && !self.y.command_emitted;
-
-        if use_x {
-            self.x.command_emitted = true;
-        }
-        if use_y {
-            self.y.command_emitted = true;
-        }
-
-        [
-            use_x.then_some(if value.x.is_positive() {
-                FlickDirection::Right
-            } else {
-                FlickDirection::Left
-            }),
-            use_y.then_some(if value.y.is_positive() {
-                FlickDirection::Up
-            } else {
-                FlickDirection::Down
-            }),
-        ]
-    }
-
-    fn consume(&mut self, value: FGVec2) -> Option<FlickDirection> {
-        let direction = self.peek(value)?;
-        // Simultaneous eligible axes are one diagonal gesture. Consuming only
-        // the selected axis would expose the other axis on the next frame.
-        if self.x.eligible {
-            self.x.consumed = true;
-            self.x.eligible = false;
-        }
-        if self.y.eligible {
-            self.y.consumed = true;
-            self.y.eligible = false;
-        }
-        Some(direction)
-    }
-
-    fn resolve(&self, value: FGVec2, use_x: bool, use_y: bool) -> Option<FlickDirection> {
-        if use_x {
-            Some(if value.x.is_positive() {
-                FlickDirection::Right
-            } else {
-                FlickDirection::Left
-            })
-        } else if use_y {
-            Some(if value.y.is_positive() {
-                FlickDirection::Up
-            } else {
-                FlickDirection::Down
-            })
-        } else {
-            None
-        }
-    }
-}
-
 /// Per-fighter input state. Every field is deterministic rollback state.
 #[derive(Component, Clone, Copy, Hash)]
 #[require(Rollback)]
@@ -376,8 +201,8 @@ pub struct FighterInput {
     button_history: [ButtonHistory; 3],
     prev_frame: FighterInputFrame,
     current_frame: FighterInputFrame,
-    movement_flick: StickFlickState,
+    frames_in_x_flick_deadzone: u8,
-    directional_attack_flick: StickFlickState,
+    frames_in_y_flick_deadzone: u8,
     attack_command: FighterAttackCommandType,
 }
 
@@ -390,8 +215,8 @@ impl Default for FighterInput {
             button_history: [ButtonHistory::default(); 3],
             prev_frame: FighterInputFrame::default(),
             current_frame: FighterInputFrame::default(),
-            movement_flick: StickFlickState::default(),
+            frames_in_x_flick_deadzone: 0xFE,
-            directional_attack_flick: StickFlickState::default(),
+            frames_in_y_flick_deadzone: 0xFE,
             attack_command: FighterAttackCommandType::Neutral,
         }
     }
@@ -541,26 +366,8 @@ impl FighterInput {
         self.current_frame.bindings_for(action).count()
     }
 
-    pub fn peek_movement_flick(&self) -> Option<FlickDirection> {
+    pub fn get_frames_in_smash_move_deadzone(&self) -> u8 {
-        self.movement_flick.peek(self.current_frame.movement)
+        self.frames_in_x_flick_deadzone
-    }
-
-    pub fn peek_movement_flick_dbg(&self) -> u8 {
-        self.movement_flick.y.age
-    }
-
-    pub fn consume_movement_flick(&mut self) -> Option<FlickDirection> {
-        self.movement_flick.consume(self.current_frame.movement)
-    }
-
-    pub fn peek_directional_attack_flick(&self) -> Option<FlickDirection> {
-        self.directional_attack_flick
-            .peek(self.current_frame.directional_attack)
-    }
-
-    pub fn consume_directional_attack_flick(&mut self) -> Option<FlickDirection> {
-        self.directional_attack_flick
-            .consume(self.current_frame.directional_attack)
     }
     pub fn set_attack_command_type(&mut self, command: FighterAttackCommandType) {
         self.attack_command = command;
@@ -632,30 +439,31 @@ pub fn postprocess_input(
             );
         }
 
-        let movement = input.current_frame.movement;
+        let x_abs = input.current_frame.movement.x.abs();
-        let previous_movement = input.prev_frame.movement;
+        let y_abs = input.current_frame.movement.y.abs();
-        let directional_attack = input.current_frame.directional_attack;
-        let previous_directional_attack = input.prev_frame.directional_attack;
-        let x_abs = movement.x.abs();
-        let y_abs = movement.y.abs();
         let reset_deadzone = game_settings.input_common.smash_input_reset_axis_threshold;
         let axis_threshold = game_settings.input_common.smash_input_axis_threshold;
         let frame_threshold = game_settings.input_common.smash_input_frame_threshold;
 
-        input.movement_flick.update(
+        if x_abs < reset_deadzone {
-            movement,
+            input.frames_in_x_flick_deadzone = 0xFE;
-            previous_movement,
+        } else if input.prev_frame.movement.x.abs() < reset_deadzone
-            reset_deadzone,
+            || input.prev_frame.movement.x.signum() != input.current_frame.movement.x.signum()
-            axis_threshold,
+        {
-            frame_threshold,
+            input.frames_in_x_flick_deadzone = 1;
-        );
+        } else {
-        input.directional_attack_flick.update(
+            input.frames_in_x_flick_deadzone = input.frames_in_x_flick_deadzone.saturating_add(1);
-            directional_attack,
+        }
-            previous_directional_attack,
+
-            reset_deadzone,
+        if y_abs < reset_deadzone {
-            axis_threshold,
+            input.frames_in_y_flick_deadzone = 0xFE;
-            frame_threshold,
+        } else if input.prev_frame.movement.y.abs() < reset_deadzone
-        );
+            || input.prev_frame.movement.y.signum() != input.current_frame.movement.y.signum()
+        {
+            input.frames_in_y_flick_deadzone = 1;
+        } else {
+            input.frames_in_y_flick_deadzone = input.frames_in_y_flick_deadzone.saturating_add(1);
+        }
 
         let tap = game_settings.input_common.input_buffer_size;
         let jump_pressed = input.is_pressed(DigitalAction::Jump);
@@ -675,40 +483,58 @@ pub fn postprocess_input(
             input.set_lifetime(FighterCommands::GuardHold, tap);
         }
 
-        for flick in input
+        let mut y_flick_detected =
-            .movement_flick
+            y_abs >= axis_threshold && input.frames_in_y_flick_deadzone <= frame_threshold;
-            .next_commands(movement)
+        let mut x_flick_detected =
-            .into_iter()
+            x_abs >= axis_threshold && input.frames_in_x_flick_deadzone <= frame_threshold;
-            .flatten()
+        if y_flick_detected {
-        {
-            let command = flick.smash_move_command();
-            match flick {
-                FlickDirection::Up | FlickDirection::Down => {
             input.clear_command(FighterCommands::SmashMoveUp);
             input.clear_command(FighterCommands::SmashMoveDown);
+            input.frames_in_y_flick_deadzone = 0xFF;
+            let command = if input.current_frame.movement.y > 0.0 {
+                FighterCommands::SmashMoveUp
+            } else {
+                FighterCommands::SmashMoveDown
+            };
+            input.set_lifetime(command, tap);
         }
-                FlickDirection::Left | FlickDirection::Right => {
+        if x_flick_detected {
             input.clear_command(FighterCommands::SmashMoveLeft);
             input.clear_command(FighterCommands::SmashMoveRight);
-                }
+            input.frames_in_x_flick_deadzone = 0xFF;
-            }
+            let command = if input.current_frame.movement.x > 0.0 {
+                FighterCommands::SmashMoveRight
+            } else {
+                FighterCommands::SmashMoveLeft
+            };
             input.set_lifetime(command, tap);
-            if flick == FlickDirection::Up {
-                input.set_lifetime(FighterCommands::TapJump, tap);
         }
+        if x_flick_detected && y_flick_detected {
+            x_flick_detected = x_abs > y_abs;
+            y_flick_detected = !x_flick_detected;
         }
 
         if attack_pressed {
-            let attack_type = if let Some(flick) = input.consume_movement_flick() {
+            let attack_type = if y_flick_detected {
-                flick.smash_attack_command()
+                if input.current_frame.movement.y > 0.0 {
+                    FighterAttackCommandType::SmashAttackUp
+                } else {
+                    FighterAttackCommandType::SmashAttackDown
+                }
+            } else if x_flick_detected {
+                if input.current_frame.movement.x > 0.0 {
+                    FighterAttackCommandType::SmashAttackRight
+                } else {
+                    FighterAttackCommandType::SmashAttackLeft
+                }
             } else if x_abs > y_abs {
-                if movement.x.is_positive() {
+                if input.current_frame.movement.x.is_positive() {
                     FighterAttackCommandType::TiltAttackRight
                 } else {
                     FighterAttackCommandType::TiltAttackLeft
                 }
             } else if y_abs > x_abs {
-                if movement.y.is_positive() {
+                if input.current_frame.movement.y.is_positive() {
                     FighterAttackCommandType::TiltAttackUp
                 } else {
                     FighterAttackCommandType::TiltAttackDown
@@ -716,16 +542,10 @@ pub fn postprocess_input(
             } else {
                 FighterAttackCommandType::Neutral
             };
-
             input.set_lifetime(FighterCommands::Attack, tap);
             input.set_attack_command_type(attack_type);
         }
 
-        if let Some(flick) = input.consume_directional_attack_flick() {
-            input.set_lifetime(FighterCommands::Attack, tap);
-            input.set_attack_command_type(flick.smash_attack_command());
-        }
-
         for command in FighterCommands::iter() {
             input.update_hold(command);
         }
@@ -737,20 +557,6 @@ mod tests {
     use super::*;
     use crate::input::ActionBindingMask;
 
-    const RESET_THRESHOLD: FGi32 = FGi32::lit("0.2");
-    const AXIS_THRESHOLD: FGi32 = FGi32::lit("0.8");
-    const FRAME_THRESHOLD: u8 = 3;
-
-    fn update_flick(state: &mut StickFlickState, current: FGVec2, previous: FGVec2) {
-        state.update(
-            current,
-            previous,
-            RESET_THRESHOLD,
-            AXIS_THRESHOLD,
-            FRAME_THRESHOLD,
-        );
-    }
-
     fn advance_command(input: &mut FighterInput, command: FighterCommands) {
         input.reduce_command_lifetime(command);
         input.update_hold(command);
@@ -771,94 +577,6 @@ mod tests {
         assert!(second_binding_pressed(current, previous));
     }
 
-    #[test]
-    fn flick_remains_available_for_the_configured_window() {
-        let mut flick = StickFlickState::default();
-        let right = FGVec2::lit("1", "0");
-
-        update_flick(&mut flick, right, FGVec2::ZERO);
-        assert_eq!(flick.peek(right), Some(FlickDirection::Right));
-
-        for _ in 2..=FRAME_THRESHOLD {
-            update_flick(&mut flick, right, right);
-            assert_eq!(flick.peek(right), Some(FlickDirection::Right));
-        }
-
-        update_flick(&mut flick, right, right);
-        assert_eq!(flick.peek(right), None);
-    }
-
-    #[test]
-    fn passive_command_does_not_consume_flick() {
-        let mut flick = StickFlickState::default();
-        let right = FGVec2::lit("1", "0");
-
-        update_flick(&mut flick, right, FGVec2::ZERO);
-        assert_eq!(
-            flick.next_commands(right),
-            [Some(FlickDirection::Right), None]
-        );
-        assert_eq!(flick.next_commands(right), [None, None]);
-        assert_eq!(flick.peek(right), Some(FlickDirection::Right));
-
-        update_flick(&mut flick, right, right);
-        assert_eq!(flick.consume(right), Some(FlickDirection::Right));
-        assert_eq!(flick.peek(right), None);
-    }
-
-    #[test]
-    fn consumed_flick_rearms_after_returning_below_reset_threshold() {
-        let mut flick = StickFlickState::default();
-        let right = FGVec2::lit("1", "0");
-
-        update_flick(&mut flick, right, FGVec2::ZERO);
-        assert_eq!(flick.consume(right), Some(FlickDirection::Right));
-        update_flick(&mut flick, right, right);
-        assert_eq!(flick.peek(right), None);
-
-        update_flick(&mut flick, FGVec2::ZERO, right);
-        update_flick(&mut flick, right, FGVec2::ZERO);
-        assert_eq!(flick.peek(right), Some(FlickDirection::Right));
-    }
-
-    #[test]
-    fn flick_can_reach_activation_threshold_after_entering_reset_deadzone() {
-        let mut flick = StickFlickState::default();
-        let partial = FGVec2::lit("0.4", "0");
-        let right = FGVec2::lit("1", "0");
-
-        update_flick(&mut flick, partial, FGVec2::ZERO);
-        assert_eq!(flick.peek(partial), None);
-        update_flick(&mut flick, right, partial);
-        assert_eq!(flick.peek(right), Some(FlickDirection::Right));
-    }
-
-    #[test]
-    fn diagonal_flick_prioritizes_horizontal_and_consumes_the_gesture() {
-        let mut flick = StickFlickState::default();
-        let diagonal = FGVec2::lit("0.9", "1");
-
-        update_flick(&mut flick, diagonal, FGVec2::ZERO);
-        assert_eq!(
-            flick.next_commands(diagonal),
-            [Some(FlickDirection::Right), Some(FlickDirection::Up)]
-        );
-        assert_eq!(flick.consume(diagonal), Some(FlickDirection::Right));
-        assert_eq!(flick.peek(diagonal), None);
-    }
-
-    #[test]
-    fn direction_reversal_starts_a_new_flick() {
-        let mut flick = StickFlickState::default();
-        let right = FGVec2::lit("1", "0");
-        let left = FGVec2::lit("-1", "0");
-
-        update_flick(&mut flick, right, FGVec2::ZERO);
-        assert_eq!(flick.consume(right), Some(FlickDirection::Right));
-        update_flick(&mut flick, left, right);
-        assert_eq!(flick.peek(left), Some(FlickDirection::Left));
-    }
-
     #[test]
     fn command_can_be_consumed_without_erasing_raw_input() {
         let mut input = FighterInput::default();

src/input/gamepad.rs

@@ -9,7 +9,6 @@ use crate::math::vec::FGVec2;
 pub fn sample_gamepad(pad: &Gamepad, input_map: &BaseInputMap) -> FighterInputFrame {
     let mut input_frame = FighterInputFrame::default();
     let mut movement = Vec2::ZERO;
-    let mut directional_attack = Vec2::ZERO;
 
     for gamepad_element in &input_map.gamepad {
         match &gamepad_element.binding {
@@ -35,24 +34,12 @@ pub fn sample_gamepad(pad: &Gamepad, input_map: &BaseInputMap) -> FighterInputFr
                             movement.y += sign as f32
                         }
                     }
-                    InputMapAction::AttackXDir(sign) => {
-                        if pressed {
-                            directional_attack.x += sign as f32;
-                        }
-                    }
-                    InputMapAction::AttackYDir(sign) => {
-                        if pressed {
-                            directional_attack.y += sign as f32;
-                        }
-                    }
                 }
             }
             // gamepad does not have a separate axis for left and right, so sign here should be 1
             GamepadBinding::Axis(axis, sign) => {
                 let value = pad.get(*axis).unwrap_or(0.0) * (*sign as f32);
                 match gamepad_element.action {
-                    InputMapAction::AttackXDir(_) => directional_attack.x += value,
-                    InputMapAction::AttackYDir(_) => directional_attack.y += value,
                     InputMapAction::MovementXDir(_) => movement.x += value,
                     InputMapAction::MovementYDir(_) => movement.y += value,
                     _ => {}
@@ -62,10 +49,6 @@ pub fn sample_gamepad(pad: &Gamepad, input_map: &BaseInputMap) -> FighterInputFr
     }
 
     input_frame.movement = FGVec2::new(FGi32::from_num(movement.x), FGi32::from_num(movement.y));
-    input_frame.directional_attack = FGVec2::new(
-        FGi32::from_num(directional_attack.x),
-        FGi32::from_num(directional_attack.y),
-    );
 
     input_frame
 }

src/input/keyboard.rs

@@ -39,12 +39,6 @@ pub fn sample_keyboard(key: &ButtonInput<KeyCode>, input_map: &BaseInputMap) ->
                     );
                 }
             }
-            InputMapAction::AttackXDir(sign) => {
-                input_frame.directional_attack.x += (sign) * action_strength;
-            }
-            InputMapAction::AttackYDir(sign) => {
-                input_frame.directional_attack.y += (sign) * action_strength;
-            }
         }
     }
 

src/input/map.rs

@@ -12,8 +12,6 @@ pub enum InputActionState {
 
 #[derive(Debug)]
 pub enum InputMapAction {
-    AttackXDir(i32),
-    AttackYDir(i32),
     MovementXDir(i32),
     MovementYDir(i32),
     Jump,
@@ -28,7 +26,6 @@ impl InputMapAction {
             Self::Shield => Some(crate::input::DigitalAction::Shield),
             Self::Attack => Some(crate::input::DigitalAction::Attack),
             Self::MovementXDir(_) | Self::MovementYDir(_) => None,
-            Self::AttackYDir(_) | Self::AttackXDir(_) => None,
         }
     }
 }

src/input/mod.rs

@@ -14,7 +14,7 @@ pub mod gamepad;
 pub mod keyboard;
 pub mod map;
 
-pub use buffer::{FighterCommands, FighterInput, FlickDirection};
+pub use buffer::{FighterCommands, FighterInput};
 pub use frame::{ActionBindingMask, DigitalAction, DigitalActionBindings, FighterInputFrame};
 pub use map::{
     BaseInputMap, GamepadBinding, GamepadInputMapElement, InputActionState, InputMapAction,
@@ -136,11 +136,6 @@ impl Plugin for FighterInputPlugin {
                     action: InputMapAction::Jump,
                     binding_slot: 0,
                 },
-                GamepadInputMapElement {
-                    binding: GamepadBinding::Button(GamepadButton::West),
-                    action: InputMapAction::Jump,
-                    binding_slot: 1,
-                },
                 GamepadInputMapElement {
                     binding: GamepadBinding::Button(GamepadButton::LeftTrigger2),
                     action: InputMapAction::Shield,
@@ -157,17 +152,6 @@ impl Plugin for FighterInputPlugin {
                     action: InputMapAction::Attack,
                     binding_slot: 0,
                 },
-                //C-stick
-                GamepadInputMapElement {
-                    binding: GamepadBinding::Axis(GamepadAxis::RightStickX, 1),
-                    action: InputMapAction::AttackXDir(1),
-                    binding_slot: 0,
-                },
-                GamepadInputMapElement {
-                    binding: GamepadBinding::Axis(GamepadAxis::RightStickY, 1),
-                    action: InputMapAction::AttackYDir(1),
-                    binding_slot: 0,
-                },
             ],
         })
         .insert_resource(MenuInputMap {
@@ -275,13 +259,6 @@ fn preprocess_input_frame(frame: &mut FighterInputFrame, game_settings: &GameSet
     if frame.movement.y.abs() < game_settings.input_common.stick_deadzone {
         frame.movement.y = FGi32::ZERO;
     }
-
-    if frame.directional_attack.x.abs() < game_settings.input_common.stick_deadzone {
-        frame.directional_attack.x = FGi32::ZERO;
-    }
-    if frame.directional_attack.y.abs() < game_settings.input_common.stick_deadzone {
-        frame.directional_attack.y = FGi32::ZERO;
-    }
 }
 
 fn read_local_inputs(

src/match_loading.rs

@@ -363,16 +363,6 @@ pub fn prepare_match(
             );
             return;
         }
-        if !baked.contains_bone(&manifest.root_motion_bone) {
-            fail_match(
-                &mut next_state,
-                &format!(
-                    "{:?} references missing root motion bone {:?}",
-                    character.fighter, manifest.root_motion_bone
-                ),
-            );
-            return;
-        }
 
         let ecb_bone_indices = baked.bone_names.iter().enumerate().filter_map(|(idx, name)| {
             if manifest.ecb_bones.contains(name) {

src/materials/fighter_material.rs

@@ -1,17 +1,10 @@
-use bevy::{
+use bevy::{gltf::GltfMaterialName, pbr::{ExtendedMaterial, MaterialExtension}, prelude::*, render::render_resource::AsBindGroup, shader::ShaderRef, world_serialization::WorldInstanceReady};
-    gltf::GltfMaterialName,
-    pbr::{ExtendedMaterial, MaterialExtension},
-    prelude::*,
-    render::render_resource::AsBindGroup,
-    shader::ShaderRef,
-    world_serialization::WorldInstanceReady,
-};
 
 pub type FighterMaterial = ExtendedMaterial<StandardMaterial, FighterMaterialExtension>;
 
 #[derive(Component)]
 pub struct FighterMesh {
-    pub fighter: Entity,
+    pub fighter: Entity
 }
 
 #[derive(Asset, AsBindGroup, Reflect, Debug, Clone, Default)]
@@ -63,6 +56,8 @@ pub fn bind_fighter_material(
             continue;
         };
 
+        dbg!(material_name);
+
         if !material_name.starts_with("Fighter_") {
             continue;
         }
@@ -71,22 +66,12 @@ pub fn bind_fighter_material(
             continue;
         };
 
-        commands
+        commands.entity(entity).insert((MeshMaterial3d(asset_materials.add(ExtendedMaterial {
-            .entity(entity)
-            .remove::<MeshMaterial3d<StandardMaterial>>()
-            .insert((
-                MeshMaterial3d(asset_materials.add(ExtendedMaterial {
             base: StandardMaterial {
                 // can be used in forward or deferred mode
                 ..original_material.clone()
             },
-                    extension: FighterMaterialExtension::new(
+            extension: FighterMaterialExtension::new(bevy::color::palettes::css::BLUE.into())
-                        bevy::color::palettes::css::BLUE.into(),
+        })), FighterMesh { fighter: scene_ready.entity  }));
-                    ),
-                })),
-                FighterMesh {
-                    fighter: scene_ready.entity,
-                },
-            ));
     }
 }

src/materials/mod.rs

@@ -8,12 +8,16 @@ pub mod fighter_material;
 
 pub struct ShinesparkMaterialPlugin;
 
+pub fn startup_test(asset_server: Res<AssetServer>) {
+    let test: Handle<Shader> = asset_server.load("embedded://shinespark/shaders/fighter.wgsl");
+    dbg!(test);
+}
 
 impl Plugin for ShinesparkMaterialPlugin {
     fn build(&self, app: &mut App) {
         let omit_prefix = "";
         embedded_asset!(app, omit_prefix, "shaders/fighter.wgsl");
-        app
+        app.add_systems(Startup, startup_test)
             .add_observer(fighter_material::bind_fighter_material)
             .add_plugins(MaterialPlugin::<fighter_material::FighterMaterial>::default());
     }

src/math/mod.rs

@@ -3,4 +3,3 @@ pub mod segment;
 pub mod vec;
 pub mod fixed_transform;
 pub mod vec3;
-pub mod rect;

src/math/rect.rs

@@ -1,12 +0,0 @@
-use crate::math::vec::FGVec2;
-
-pub struct FGRect {
-    pub origin: FGVec2,
-    pub end: FGVec2,
-}
-
-impl FGRect {
-    pub fn contains_point(&self, point: FGVec2) -> bool {
-        point.x >= self.origin.x && point.y <= self.origin.y && point.x <= self.end.x && point.y >= self.end.y
-    }
-}

src/menus/navigation.rs

@@ -153,8 +153,8 @@ pub fn navigate(
             Ok(_entity) => {
                 // Successfully navigated
             }
-            Err(_e) => {
+            Err(e) => {
-                //error!("Navigation error: {}", e)
+                error!("Navigation error: {}", e)
             }
         }
     }

src/schedule.rs

@@ -17,14 +17,14 @@ pub enum GameplaySet {
     Input,
     /// Decide whether the current fighter state hands off to another one.
     Interrupt,
-    /// Sample the animation pose selected by the interrupt pass.
-    Animation,
     /// Run the fighter state that survived the interrupt pass.
     StateUpdate,
     /// Integrate velocities into positions.
     Physics,
     /// Resolve the integrated positions against the stage.
     Collision,
+    /// Solve collision boxes
+    Animation,
     /// Resolve attacks
     Attacks,
     /// Advance match rules and detect the end of the match.
@@ -42,9 +42,9 @@ impl Plugin for GameplaySchedulePlugin {
             (
                 GameplaySet::Input,
                 GameplaySet::Interrupt,
-                GameplaySet::Animation,
                 GameplaySet::StateUpdate,
                 GameplaySet::Physics,
+                GameplaySet::Animation,
                 GameplaySet::Collision,
                 GameplaySet::Attacks,
                 GameplaySet::MatchRules,

src/scripting/mod.rs

@@ -17,7 +17,6 @@ pub struct FighterAttackScript {
     pub iasa_frame: Option<u32>,
     pub wont_autocancel_window: Option<(u32, u32)>,
     pub landing_duration: Option<u32>,
-    pub use_root_motion: bool
 }
 
 impl FighterAttackScript {

src/scripting/move_compiler.rs

@@ -17,7 +17,6 @@ struct MoveCompiler {
     iasa_frame: Option<u32>,
     landing_duration: Option<u32>,
     cursor: u32,
-    use_root_motion: bool,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -115,10 +114,6 @@ impl MoveCompiler {
         self.iasa_frame = Some(iasa_frame);
     }
 
-    fn enable_root_motion(&mut self) {
-        self.use_root_motion = true;
-    }
-
     fn into_attack_script(mut self) -> Result<FighterAttackScript, String> {
         self.remove_all_hitboxes().map_err(|err| err.to_string())?;
         let mut hitboxes = self.hitboxes;
@@ -129,7 +124,6 @@ impl MoveCompiler {
             iasa_frame: self.iasa_frame,
             wont_autocancel_window: self.wont_autocancel_window,
             landing_duration: self.landing_duration,
-            use_root_motion: self.use_root_motion,
         })
     }
 }
@@ -238,18 +232,6 @@ pub fn compile_script(text: &str) -> Result<FighterAttackScript, String> {
             );
         }
 
-        {
-            let mc = mc.clone();
-            engine.register_fn(
-                "enable_root_motion",
-                move || -> Result<(), Box<EvalAltResult>> {
-                    let mut b = mc.borrow_mut();
-                    b.enable_root_motion();
-                    Ok(())
-                },
-            );
-        }
-
         {
             let mc = mc.clone();
             engine.register_fn(
@@ -278,8 +260,9 @@ pub fn compile_script(text: &str) -> Result<FighterAttackScript, String> {
             );
         }
 
-        // Keep the original script syntax working. Melee's default collision
+        // Keep the original script syntax working. A hitbox without an
-        // group is shared by all hitbox slots in an attack.
+        // explicit group behaves as its own group, which preserves the old
+        // one-hit-per-target behavior.
         {
             let mc = mc.clone();
             engine.register_fn(
@@ -297,7 +280,7 @@ pub fn compile_script(text: &str) -> Result<FighterAttackScript, String> {
                     add_hitbox(
                         &mc,
                         id,
-                        0,
+                        id,
                         bone,
                         damage,
                         offset,
@@ -478,19 +461,4 @@ mod tests {
         assert_eq!(script.hitboxes[0].id, 7);
         assert_eq!(script.hitboxes[0].group, 3);
     }
-
-    #[test]
-    fn legacy_hitboxes_share_the_default_collision_group() {
-        let script = compile_script(
-            r#"
-                frame(1);
-                hitbox(0, "hand_l", damage("1"), vec3("0", "0", "0"), fg32("1"), angle("0"), knockback_normal(), knockback("1"), fg32("1"));
-                hitbox(1, "hand_l", damage("1"), vec3("0", "0", "0"), fg32("1"), angle("0"), knockback_normal(), knockback("1"), fg32("1"));
-                frame(2);
-            "#,
-        )
-        .unwrap();
-
-        assert_eq!(script.hitboxes.iter().map(|hitbox| hitbox.group).collect::<Vec<_>>(), vec![0, 0]);
-    }
 }

src/stage/debug.rs

@@ -1,15 +1,15 @@
 use bevy::{color::palettes::css::RED, prelude::*};
 
 use crate::{
-    game_settings::GameSettings, match_loading::MatchConfig, math::{int::FGi32, vec3::FGVec3}, stage::{
+    match_loading::MatchConfig, math::{int::FGi32, vec3::FGVec3}, stage::{
-        line::{StageCollision, StageLedgeSide, StagePolyLineSegmentType}, manifest::{StageManifest, StageManifestRegistry},
+        line::StageCollision,
+        manifest::{StageManifest, StageManifestRegistry},
     },
 };
 
-pub fn debug_draw_scene(mut gizmos: Gizmos, stage_collision: Res<StageCollision>, game_settings: Res<GameSettings>) {
+pub fn debug_draw_scene(mut gizmos: Gizmos, stage_collision: Res<StageCollision>) {
     for poly in stage_collision.stage_polys.iter() {
-        for (segment, next_segment) in poly.segments.iter().zip(poly.segments.iter().cycle().skip(1)) {
+        for segment in poly.segments.iter() {
-            let wavedash_normal = ((next_segment.normal.to_vec2() + segment.normal.to_vec2()) * 0.5).normalize();
             let from = segment.segment.point1().to_vec2();
             let to = segment.segment.point2().to_vec2();
             let from_3d = Vec3::new(from.x, from.y, 0.0);
@@ -18,32 +18,8 @@ pub fn debug_draw_scene(mut gizmos: Gizmos, stage_collision: Res<StageCollision>
             gizmos.line(from_3d, end_3d, RED);
             let midpoint = (from_3d + end_3d) * 0.5;
             gizmos.arrow(midpoint, midpoint + normal_3d, RED);
-            if matches!(segment.segment_type, StagePolyLineSegmentType::Floor) {
-                let radius = game_settings.fighter_common.waveland_snap_distance.to_num::<f32>();
-                let a = segment.segment.point1().to_vec2();
-                let a = Vec3::new(a.x, a.y, 0.0);
-                let b = segment.segment.point2().to_vec2();
-                let b = Vec3::new(b.x, b.y, 0.0);
-                let offset = Vec3::new(wavedash_normal.x, wavedash_normal.y, 0.0) * radius;
-                gizmos.line(a + offset, b + offset, bevy::color::palettes::css::HOT_PINK);
-                gizmos.line(a - offset, b - offset, bevy::color::palettes::css::HOT_PINK);
         }
     }
-    }
-
-    for ledge in &stage_collision.ledges {
-        let position = ledge.position.to_vec2().extend(0.0);
-        let direction = match ledge.hang_side {
-            StageLedgeSide::Left => Vec3::NEG_X,
-            StageLedgeSide::Right => Vec3::X,
-        };
-        gizmos.circle(position, 1.5, bevy::color::palettes::css::LIME);
-        gizmos.arrow(
-            position,
-            position + direction * 4.0,
-            bevy::color::palettes::css::LIME,
-        );
-    }
 }
 
 pub fn debug_draw_blast_zones(

src/stage/line.rs

@@ -3,7 +3,7 @@
 use bevy::prelude::*;
 use serde::{Deserialize, Serialize};
 
-use crate::math::{rect::FGRect, segment::FGSegment2d, vec::FGVec2};
+use crate::math::{segment::FGSegment2d, vec::FGVec2};
 
 #[derive(Reflect, Clone, Copy, PartialEq, Serialize, Deserialize)]
 pub enum StagePolyLineSegmentType {
@@ -32,27 +32,6 @@ pub struct StageLineID {
     pub segment: usize,
 }
 
-/// Identifies a corner in the stage collision geometry.
-#[derive(Reflect, Hash, Debug, Clone, Copy, Default, PartialEq, Eq)]
-pub struct StageVertexID {
-    pub polygon: usize,
-    pub vertex: usize,
-}
-
-/// The side of a ledge on which a grabbing fighter hangs.
-#[derive(Reflect, Serialize, Deserialize, Hash, Debug, Clone, Copy, PartialEq, Eq)]
-pub enum StageLedgeSide {
-    Left,
-    Right,
-}
-
-#[derive(Reflect, Hash, Debug, Clone, Copy, PartialEq)]
-pub struct StageLedge {
-    pub id: StageVertexID,
-    pub position: FGVec2,
-    pub hang_side: StageLedgeSide,
-}
-
 #[derive(Reflect, Clone, Default)]
 pub struct StagePoly {
     pub poly_type: StagePolyType,
@@ -65,65 +44,10 @@ pub struct StagePlaneIntersectResult {
     pub normal: FGVec2,
 }
 
-pub struct StageLedgeIntersectResult {
-    pub vertex_id: StageVertexID,
-    pub ledge_idx: usize
-}
-
-
 #[derive(Resource, Reflect, Clone, Default)]
 #[reflect(Resource)]
 pub struct StageCollision {
     pub stage_polys: Vec<StagePoly>,
-    pub ledges: Vec<StageLedge>,
-}
-
-impl StageCollision {
-    pub fn intersect_ledges(&self, ledge_grab_box: &FGRect) -> Option<StageLedgeIntersectResult> {
-        for (ledge_idx, ledge) in self.ledges.iter().enumerate() {
-            if ledge_grab_box.contains_point(ledge.position) {
-                return Some(StageLedgeIntersectResult {
-                    vertex_id: ledge.id,
-                    ledge_idx
-                });
-            }
-        }
-        None
-    }
-
-    pub fn find_ledge_by_vertex(&self, vertex: StageVertexID) -> Option<&StageLedge> {
-        self.ledges.iter().find(|ledge| ledge.id == vertex)
-    }
-
-    /// Returns the walkable segment on the stage side of a ledge.
-    pub fn find_ledge_ground_segment(
-        &self,
-        vertex: StageVertexID,
-    ) -> Option<(StageLineID, &StagePolyLineSegment)> {
-        let ledge = self.find_ledge_by_vertex(vertex)?;
-        let polygon = self.stage_polys.get(vertex.polygon)?;
-        let segment = match ledge.hang_side {
-            StageLedgeSide::Left => vertex.vertex,
-            StageLedgeSide::Right => {
-                if vertex.vertex > 0 {
-                    vertex.vertex - 1
-                } else if matches!(polygon.poly_type, StagePolyType::Closed) {
-                    polygon.segments.len().checked_sub(1)?
-                } else {
-                    return None;
-                }
-            }
-        };
-        let line_id = StageLineID {
-            polygon: vertex.polygon,
-            segment,
-        };
-        Some((line_id, polygon.get_segment(segment)?))
-    }
-
-    pub fn get_segment(&self, segment: StageLineID) -> Option<&StagePolyLineSegment> {
-        self.stage_polys.get(segment.polygon).map(|poly| poly.segments.get(segment.segment))?
-    }
 }
 
 impl StagePoly {

src/stage/manifest.rs

@@ -9,10 +9,7 @@ use strum_macros::EnumIter;
 use crate::{
     AppState, game_settings::GameSettings, math::{vec::FGVec2}, stage::{
         StagePoly,
-        line::{
+        line::{StageCollision, StagePolyLineSegmentType, StagePolyType},
-            StageCollision, StageLedge, StageLedgeSide, StagePolyLineSegment,
-            StagePolyLineSegmentType, StagePolyType, StageVertexID,
-        },
     }, texture_reference::TextureReference,
 };
 use bevy::prelude::*;
@@ -74,16 +71,6 @@ pub enum StageId {
 pub struct StagePolyDefinition {
     poly_type: StagePolyType,
     lines: Vec<(FGVec2, StagePolyLineSegmentType)>,
-    #[serde(default)]
-    ledges: Vec<StageLedgeDefinition>,
-}
-
-#[derive(Serialize, Deserialize, Clone, Copy, Reflect)]
-pub struct StageLedgeDefinition {
-    /// Index into the polygon's `lines`, identifying the corner position.
-    vertex: usize,
-    /// Side of the corner on which a grabbing fighter will hang.
-    hang_side: StageLedgeSide,
 }
 
 #[derive(Deserialize, Clone, Asset, Reflect, RonAsset)]
@@ -189,13 +176,6 @@ pub fn prepare_stage_manifests(
             );
             return;
         }
-        if let Err(error) = manifest.validate_ledges() {
-            fail(
-                &mut next_state,
-                &format!("{:?} has invalid ledges: {error}", manifest.id),
-            );
-            return;
-        }
         if registry.insert(manifest.id, handle.clone()).is_some() {
             fail(
                 &mut next_state,
@@ -287,14 +267,6 @@ impl StageManifest {
         Ok(())
     }
 
-    fn validate_ledges(&self) -> Result<(), String> {
-        for (polygon_index, definition) in self.polygons.iter().enumerate() {
-            definition.validate_ledges(polygon_index)?;
-        }
-
-        Ok(())
-    }
-
     pub fn to_collision(&self) -> StageCollision {
         let stage_polys: Vec<StagePoly> = self
             .polygons
@@ -302,84 +274,7 @@ impl StageManifest {
             .map(|def| StagePoly::build(def.poly_type, &def.lines))
             .collect();
 
-        let ledges = self
+        StageCollision { stage_polys }
-            .polygons
-            .iter()
-            .enumerate()
-            .flat_map(|(polygon, definition)| definition.resolved_ledges(polygon))
-            .collect();
-
-        StageCollision {
-            stage_polys,
-            ledges,
-        }
-    }
-}
-
-impl StagePolyDefinition {
-    fn validate_ledges(&self, polygon_index: usize) -> Result<(), String> {
-        let polygon = StagePoly::build(self.poly_type, &self.lines);
-        let mut vertices = HashSet::with_capacity(self.ledges.len());
-
-        for ledge in &self.ledges {
-            if ledge.vertex >= self.lines.len() {
-                return Err(format!(
-                    "polygon {polygon_index} references missing vertex {}",
-                    ledge.vertex
-                ));
-            }
-            if !vertices.insert(ledge.vertex) {
-                return Err(format!(
-                    "polygon {polygon_index} defines vertex {} as a ledge more than once",
-                    ledge.vertex
-                ));
-            }
-
-            let outgoing = polygon.get_segment(ledge.vertex);
-            let incoming_index = if ledge.vertex > 0 {
-                Some(ledge.vertex - 1)
-            } else if matches!(self.poly_type, StagePolyType::Closed) {
-                polygon.segments.len().checked_sub(1)
-            } else {
-                None
-            };
-            let incoming = incoming_index.and_then(|index| polygon.get_segment(index));
-            let is_walkable_floor = |segment: Option<&StagePolyLineSegment>| {
-                segment.is_some_and(|segment| {
-                    segment.segment_type == StagePolyLineSegmentType::Floor
-                        && segment.normal.y > crate::math::int::FGi32::ZERO
-                })
-            };
-            let (interior, exterior) = match ledge.hang_side {
-                StageLedgeSide::Left => (outgoing, incoming),
-                StageLedgeSide::Right => (incoming, outgoing),
-            };
-            if !is_walkable_floor(interior) {
-                return Err(format!(
-                    "polygon {polygon_index} vertex {} has no upward-facing floor opposite its {:?} hang side",
-                    ledge.vertex, ledge.hang_side
-                ));
-            }
-            if is_walkable_floor(exterior) {
-                return Err(format!(
-                    "polygon {polygon_index} vertex {} is between two walkable floors rather than at an exposed corner",
-                    ledge.vertex
-                ));
-            }
-        }
-
-        Ok(())
-    }
-
-    fn resolved_ledges(&self, polygon: usize) -> impl Iterator<Item = StageLedge> + '_ {
-        self.ledges.iter().map(move |ledge| StageLedge {
-            id: StageVertexID {
-                polygon,
-                vertex: ledge.vertex,
-            },
-            position: self.lines[ledge.vertex].0,
-            hang_side: ledge.hang_side,
-        })
     }
 }
 
@@ -424,115 +319,3 @@ impl StageCameraProfile {
                 < 90.0
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::stage::line::StageLineID;
-
-    fn platform(ledges: Vec<StageLedgeDefinition>) -> StagePolyDefinition {
-        StagePolyDefinition {
-            poly_type: StagePolyType::Platform,
-            lines: vec![
-                (FGVec2::lit("-5", "0"), StagePolyLineSegmentType::Floor),
-                (FGVec2::lit("5", "0"), StagePolyLineSegmentType::Floor),
-            ],
-            ledges,
-        }
-    }
-
-    #[test]
-    fn platform_endpoints_can_be_defined_as_ledges() {
-        let definition = platform(vec![
-            StageLedgeDefinition {
-                vertex: 0,
-                hang_side: StageLedgeSide::Left,
-            },
-            StageLedgeDefinition {
-                vertex: 1,
-                hang_side: StageLedgeSide::Right,
-            },
-        ]);
-
-        assert_eq!(definition.validate_ledges(3), Ok(()));
-        let ledges = definition.resolved_ledges(3).collect::<Vec<_>>();
-        assert_eq!(ledges[0].id, StageVertexID { polygon: 3, vertex: 0 });
-        assert_eq!(ledges[0].position, FGVec2::lit("-5", "0"));
-        assert_eq!(ledges[1].id, StageVertexID { polygon: 3, vertex: 1 });
-        assert_eq!(ledges[1].position, FGVec2::lit("5", "0"));
-    }
-
-    #[test]
-    fn ledge_ground_segments_point_toward_the_stage_interior() {
-        let definition = platform(vec![
-            StageLedgeDefinition {
-                vertex: 0,
-                hang_side: StageLedgeSide::Left,
-            },
-            StageLedgeDefinition {
-                vertex: 1,
-                hang_side: StageLedgeSide::Right,
-            },
-        ]);
-        let collision = StageCollision {
-            stage_polys: vec![StagePoly::build(definition.poly_type, &definition.lines)],
-            ledges: definition.resolved_ledges(0).collect(),
-        };
-
-        for vertex in [0, 1] {
-            let (line_id, segment) = collision
-                .find_ledge_ground_segment(StageVertexID { polygon: 0, vertex })
-                .unwrap();
-            assert_eq!(line_id, StageLineID { polygon: 0, segment: 0 });
-            assert!(matches!(
-                segment.segment_type,
-                StagePolyLineSegmentType::Floor
-            ));
-        }
-    }
-
-    #[test]
-    fn invalid_and_duplicate_ledge_vertices_are_rejected() {
-        let missing = platform(vec![StageLedgeDefinition {
-            vertex: 2,
-            hang_side: StageLedgeSide::Right,
-        }]);
-        assert!(missing.validate_ledges(0).is_err());
-
-        let duplicate = platform(vec![
-            StageLedgeDefinition {
-                vertex: 0,
-                hang_side: StageLedgeSide::Left,
-            },
-            StageLedgeDefinition {
-                vertex: 0,
-                hang_side: StageLedgeSide::Right,
-            },
-        ]);
-        assert!(duplicate.validate_ledges(0).is_err());
-    }
-
-    #[test]
-    fn ledge_must_border_an_upward_facing_floor() {
-        let definition = StagePolyDefinition {
-            poly_type: StagePolyType::Platform,
-            lines: vec![
-                (FGVec2::lit("0", "0"), StagePolyLineSegmentType::Wall),
-                (FGVec2::lit("0", "5"), StagePolyLineSegmentType::Wall),
-            ],
-            ledges: vec![StageLedgeDefinition {
-                vertex: 0,
-                hang_side: StageLedgeSide::Left,
-            }],
-        };
-
-        assert!(definition.validate_ledges(0).is_err());
-
-        let wrong_side = platform(vec![StageLedgeDefinition {
-            vertex: 0,
-            hang_side: StageLedgeSide::Right,
-        }]);
-        assert!(wrong_side.validate_ledges(0).is_err());
-    }
-
-}