Fix GameCube poll thread shutdown and backoff

src/debug_tools/save_state.rs

@@ -1,22 +1,12 @@
 use bevy::prelude::*;
 
 use crate::{
-    camera::MatchCamera,
+    camera::MatchCamera, fighter::{
-    fighter::{
+        FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake, FighterPreviousFacingDirection, FighterPreviousTranslation, FighterTranslation, FighterVelocity, Grounded, animation::FighterAnimationFrame, attack::{
-        FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake,
-        FighterPreviousFacingDirection, FighterPreviousTranslation, FighterSurfaceState,
-        FighterTranslation, FighterVelocity,
-        animation::FighterAnimationFrame,
-        attack::{
             FighterDamage, FighterKnockbackVelocity, FighterPendingHitReaction, FighterPendingHits,
             FighterSolvedHurtboxes, FighterStaleMoveQueue,
-        },
+        }, baked_animation::FighterBoneMatrices, state::FighterState,
-        baked_animation::FighterBoneMatrices,
+    }, input::FighterInput, player::Player, stage::line::StageCollision,
-        state::FighterState,
-    },
-    input::FighterInput,
-    player::Player,
-    stage::line::StageCollision,
 };
 
 #[derive(Resource, Default)]
@@ -54,7 +44,7 @@ struct FighterCheckpoint {
     hitboxes: FighterHitboxes,
     solved_hurtboxes: FighterSolvedHurtboxes,
     bone_matrices: FighterBoneMatrices,
-    surface: FighterSurfaceState,
+    grounded: bool,
 }
 
 pub(super) fn save_or_restore(world: &mut World) {
@@ -153,7 +143,11 @@ pub(super) fn save_or_restore(world: &mut World) {
         entity.insert(saved.hitboxes.clone());
         entity.insert(saved.solved_hurtboxes.clone());
         entity.insert(saved.bone_matrices.clone());
-        entity.insert(saved.surface.clone());
+        if saved.grounded {
+            entity.insert(Grounded);
+        } else {
+            entity.remove::<Grounded>();
+        }
     }
     world.insert_resource(checkpoint.pending_hits.clone());
     world.insert_resource(checkpoint.stage_collision);
@@ -187,7 +181,7 @@ fn capture_fighter(world: &World, entity: Entity) -> Option<FighterCheckpoint> {
         hitboxes: fighter.get::<FighterHitboxes>()?.clone(),
         solved_hurtboxes: fighter.get::<FighterSolvedHurtboxes>()?.clone(),
         bone_matrices: fighter.get::<FighterBoneMatrices>()?.clone(),
-        surface: fighter.get::<FighterSurfaceState>()?.clone(),
+        grounded: fighter.contains::<Grounded>(),
     })
 }
 

src/fighter/animation.rs

@@ -84,11 +84,6 @@ pub enum AnimKind {
     AirDodge,
     Fall,
     Turn,
-    CrouchEnter,
-    CrouchIdle,
-    CrouchExit,
-
-    PlatformPass,
 
     FlinchGround,
     FlinchAir,

src/fighter/attack/mod.rs

@@ -605,6 +605,7 @@ impl Plugin for FighterAttackPlugin {
                 intersect_attacks_with_hurtboxes,
             )
                 .chain()
+                .after(crate::fighter::baked_animation::update_fighter_bone_matrices)
                 .in_set(GameplaySet::Attacks),
         );
     }

src/fighter/baked_animation/mod.rs

@@ -219,7 +219,6 @@ mod tests {
         second.translate(FGVec3::lit("0", "3", "0"));
         let mut matrices = FighterBoneMatrices::default();
         matrices.set_pose(
-            AnimKind::Wait,
             &["root".into(), "hand".into()],
             &[None, Some(0)],
             &[first, second],
@@ -240,7 +239,6 @@ mod tests {
         hand.translate(FGVec3::lit("0", "3", "0"));
         let mut matrices = FighterBoneMatrices::default();
         matrices.set_pose(
-            AnimKind::Wait,
             &["root".into(), "hand".into()],
             &[None, Some(0)],
             &[root, hand],
@@ -268,9 +266,9 @@ mod tests {
         let parents = [None, Some(0)];
         let pose = [FixedMat4::IDENTITY, FixedMat4::IDENTITY];
 
-        matrices.set_pose(AnimKind::Wait, &names, &parents, &pose, FGi32::ONE);
+        matrices.set_pose(&names, &parents, &pose, FGi32::ONE);
         let capacities = matrices.buffer_capacities();
-        matrices.set_pose(AnimKind::Wait, &names, &parents, &pose, FGi32::ONE);
+        matrices.set_pose(&names, &parents, &pose, FGi32::ONE);
 
         assert_eq!(capacities, matrices.buffer_capacities());
     }
@@ -283,7 +281,6 @@ mod tests {
         hand.translate(FGVec3::lit("0", "2", "0"));
         let mut matrices = FighterBoneMatrices::default();
         matrices.set_pose(
-            AnimKind::Wait,
             &["root".into(), "hand".into()],
             &[None, Some(0)],
             &[root, hand],

src/fighter/baked_animation/runtime.rs

@@ -71,7 +71,6 @@ pub struct FighterBoneMatrices {
     local_matrices: Vec<FixedMat4>,
     previous_local_matrices: Vec<FixedMat4>,
     model_matrices: Vec<Option<FixedMat4>>,
-    presentation_kind: Option<AnimKind>,
 }
 
 #[derive(Component, Clone, Debug, Default)]
@@ -89,12 +88,6 @@ impl FighterBoneMatrices {
         ]
     }
 
-    pub fn get_by_idx(&self, index: usize) -> Option<(FixedMat4, FixedMat4)> {
-        Some((
-            *self.previous_frame_matrices.get(index)?,
-            *self.matrices.get(index)?,
-        ))
-    }
     pub fn get(&self, bone: &str) -> Option<(FixedMat4, FixedMat4)> {
         let index = self.bone_names.iter().position(|name| name == bone)?;
         Some((
@@ -139,7 +132,6 @@ impl FighterBoneMatrices {
     }
     pub(super) fn set_pose(
         &mut self,
-        kind: AnimKind,
         bone_names: &[String],
         parents: &[Option<usize>],
         local: &[FixedMat4],
@@ -168,7 +160,6 @@ impl FighterBoneMatrices {
         self.previous_local_matrices.reserve(local.len());
         self.model_matrices.reserve(local.len());
         std::mem::swap(&mut self.matrices, &mut self.previous_frame_matrices);
-        let animation_changed = self.presentation_kind != Some(kind);
         std::mem::swap(&mut self.local_matrices, &mut self.previous_local_matrices);
         self.local_matrices.clear();
         self.local_matrices.extend_from_slice(local);
@@ -192,14 +183,6 @@ impl FighterBoneMatrices {
                 model_scale.mul(matrix.expect("baked bone hierarchy should be valid"))
             }),
         );
-        // 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.
-        if animation_changed {
-            self.previous_local_matrices
-                .clone_from(&self.local_matrices);
-        }
-        self.presentation_kind = Some(kind);
     }
 }
 
@@ -229,7 +212,6 @@ pub fn update_fighter_bone_matrices(
             .get(&fighter.manifest)
             .expect("fighter manifest should be loaded before the match starts");
         matrices.set_pose(
-            frame.kind,
             &baked.bone_names,
             &baked.parents,
             pose,

src/fighter/collision.rs

@@ -4,7 +4,7 @@ use crate::fighter::ecb::FighterPreviousECB;
 use crate::fighter::{FighterECB, FighterPreviousTranslation, FighterTranslation};
 use crate::math::segment::FGSegment2d;
 use crate::math::vec::FGVec2;
-use crate::stage::line::{StageCollision, StageLineID, StagePolyType};
+use crate::stage::line::{StageCollision, StageLineID};
 /*
 pub fn collide_fighter_with_scene(
     fighters: Query<(&FighterECB, &mut FighterVelocity, &mut FighterTranslation)>,
@@ -44,8 +44,6 @@ pub fn air_collide_with_stage(
     prev_ecb: &FighterPreviousECB,
     ecb: &FighterECB,
     stage_collision: &StageCollision,
-    ignored_polys: &[usize],
-    ignore_soft_platforms: bool,
 ) -> Option<AirCollisionWithStageResult> {
     let ray_segment = FGSegment2d::new(
         prev_translation.0 + prev_ecb.get_bottom_point(),
@@ -56,10 +54,6 @@ pub fn air_collide_with_stage(
         .stage_polys
         .iter()
         .enumerate()
-        .filter(|(poly_idx, poly)| {
-            !ignored_polys.contains(poly_idx)
-                && !(ignore_soft_platforms && matches!(poly.poly_type, StagePolyType::Platform))
-        })
         .filter_map(|(poly_idx, poly)| {
             poly.intersect_ray(ray_segment).map(|intersect_result| {
                 (
@@ -82,134 +76,3 @@ pub fn air_collide_with_stage(
         .max_by(|(_, a), (_, b)| a.cmp(b))
         .map(|(result, _)| result)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::fighter::ecb::{FighterECB, FighterPreviousECB};
-    use crate::stage::line::{StagePoly, StagePolyLineSegmentType, StagePolyType};
-
-    fn horizontal_platform(y: &str) -> StagePoly {
-        StagePoly::build(
-            StagePolyType::Platform,
-            &[
-                (FGVec2::lit("-2", y), StagePolyLineSegmentType::Floor),
-                (FGVec2::lit("2", y), StagePolyLineSegmentType::Floor),
-            ],
-        )
-    }
-
-    fn solid_floor() -> StagePoly {
-        StagePoly::build(
-            StagePolyType::Closed,
-            &[
-                (FGVec2::lit("-2", "0"), StagePolyLineSegmentType::Floor),
-                (FGVec2::lit("2", "0"), StagePolyLineSegmentType::Floor),
-                (FGVec2::lit("2", "-2"), StagePolyLineSegmentType::Wall),
-                (FGVec2::lit("-2", "-2"), StagePolyLineSegmentType::Wall),
-            ],
-        )
-    }
-
-    #[test]
-    fn airborne_collision_skips_ignored_polygons() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![horizontal_platform("0"), horizontal_platform("1")],
-        };
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
-        let translation = FighterTranslation(FGVec2::lit("0", "-1"));
-        let previous_ecb = FighterPreviousECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-        let ecb = FighterECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-
-        let collision = air_collide_with_stage(
-            &previous_translation,
-            &translation,
-            &previous_ecb,
-            &ecb,
-            &stage_collision,
-            &[1],
-            false,
-        )
-        .expect("the non-ignored platform should still be collidable");
-
-        assert_eq!(collision.line_id.polygon, 0);
-        assert_eq!(collision.hit_position, FGVec2::lit("0", "0"));
-    }
-
-    #[test]
-    fn airborne_collision_skips_soft_platforms_while_passing_down() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![horizontal_platform("0")],
-        };
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
-        let translation = FighterTranslation(FGVec2::lit("0", "-1"));
-        let previous_ecb = FighterPreviousECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-        let ecb = FighterECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-
-        assert!(air_collide_with_stage(
-            &previous_translation,
-            &translation,
-            &previous_ecb,
-            &ecb,
-            &stage_collision,
-            &[],
-            true,
-        )
-        .is_none());
-    }
-
-    #[test]
-    fn airborne_collision_still_hits_solid_floors_while_passing_down() {
-        let stage_collision = StageCollision {
-            stage_polys: vec![solid_floor()],
-        };
-        let previous_translation = FighterPreviousTranslation(FGVec2::lit("0", "2"));
-        let translation = FighterTranslation(FGVec2::lit("0", "-1"));
-        let previous_ecb = FighterPreviousECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-        let ecb = FighterECB {
-            bottom: FGVec2::ZERO,
-            top: FGVec2::ZERO,
-            left: FGVec2::ZERO,
-            right: FGVec2::ZERO,
-        };
-
-        let collision = air_collide_with_stage(
-            &previous_translation,
-            &translation,
-            &previous_ecb,
-            &ecb,
-            &stage_collision,
-            &[],
-            true,
-        )
-        .expect("solid floors remain collidable while passing down");
-
-        assert_eq!(collision.line_id.polygon, 0);
-        assert_eq!(collision.hit_position, FGVec2::lit("0", "0"));
-    }
-}

src/fighter/debug.rs

@@ -27,7 +27,6 @@ use crate::game_settings::GameSettings;
 use crate::input::FighterInput;
 use crate::math::int::FGi32;
 use crate::math::vec::FGVec2;
-use crate::math::vec3::FGVec3;
 use crate::player::Player;
 
 pub fn debug_draw_ecb(
@@ -40,12 +39,6 @@ pub fn debug_draw_ecb(
     mut gizmos: Gizmos,
 ) {
     for (ecb, trf, ecb_prev, trf_prev) in ecbs {
-        gizmos.cross(
-            FGVec3::new(trf.0.x, trf.0.y, FGi32::ZERO).to_vec3(),
-            2.0,
-            bevy::color::palettes::css::BLUE,
-        );
-
         let transformed =
             ecb.to_3d_lineloop(Transform::from_xyz(trf.x.to_num(), trf.y.to_num(), 0.0));
         gizmos.lineloop(transformed, YELLOW);
@@ -160,17 +153,10 @@ pub fn fighter_debug(
     Ok(())
 }
 
-pub fn animation_debug(
+pub fn animation_debug(query: Query<(&GlobalTransform, &FighterBoneMatrices)>, mut gizmos: Gizmos) {
-    query: Query<(
+    for (global_transform, matrices) in query {
-        &FighterTranslation,
+        let (_, rotation, translation) = global_transform.to_scale_rotation_translation();
-        &FighterFacingDirection,
+        let marker_transform = Transform::from_translation(translation).with_rotation(rotation);
-        &FighterBoneMatrices,
-    )>,
-    mut gizmos: Gizmos,
-) {
-    for (global_transform, facing_dir, matrices) in query {
-        let global_transform = global_transform.get_3d_transform(facing_dir);
-        let marker_transform = global_transform.to_mat4();
         for (_, matrix) in matrices.iter() {
             let pos = marker_transform.transform_point(Vec3::new(
                 matrix.cols[3][0].to_num(),

src/fighter/ecb.rs

@@ -1,44 +1,28 @@
 use bevy::prelude::*;
 
-use crate::{
+use crate::math::{int::FGi32, vec::FGVec2};
-    fighter::{
-        FighterFacingDirection, FighterSurfaceState, FighterTranslation,
-        baked_animation::FighterBoneMatrices,
-    }, 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)]
+#[derive(Component, Debug, Clone, Copy, Hash)]
 #[require(FighterPreviousECB)]
 pub struct FighterECB {
-    pub top: FGVec2,
+    pub vertical_half: FGi32,
-    pub bottom: FGVec2,
+    pub horizontal_half: FGi32,
-    pub left: FGVec2,
-    pub right: FGVec2,
-}
-
-#[derive(Component, Debug, Clone)]
-pub struct FighterECBBoneIndices {
-    pub indices: Vec<usize>,
 }
 
 #[derive(Component, Debug, Clone, Copy, Default, Hash)]
 pub struct FighterPreviousECB {
-    pub top: FGVec2,
+    pub vertical_half: FGi32,
-    pub bottom: FGVec2,
+    pub horizontal_half: FGi32,
-    pub left: FGVec2,
-    pub right: FGVec2,
 }
 
 impl From<FighterECB> for FighterPreviousECB {
     fn from(ecb: FighterECB) -> Self {
         Self {
-            top: ecb.top,
+            vertical_half: ecb.vertical_half,
-            bottom: ecb.bottom,
+            horizontal_half: ecb.horizontal_half,
-            left: ecb.left,
-            right: ecb.right,
         }
     }
 }
@@ -51,85 +35,53 @@ pub fn snapshot_fighter_ecb(fighters: Query<(&FighterECB, &mut FighterPreviousEC
 
 impl FighterECB {
     pub fn to_3d_lineloop(&self, trf: Transform) -> [Vec3; 4] {
-        [self.top, self.right, self.bottom, self.left]
+        let rel_up = trf.transform_point(Vec3::new(
-            .map(|point| trf.transform_point(Vec3::new(point.x.to_num(), point.y.to_num(), 0.0)))
+            0.0,
+            (self.vertical_half + self.vertical_half).to_num(),
+            0.0,
+        ));
+        let rel_down = trf.transform_point(Vec3::new(0.0, 0.0, 0.0));
+        let rel_left = trf.transform_point(Vec3::new(
+            (-self.horizontal_half).to_num(),
+            self.vertical_half.to_num(),
+            0.0,
+        ));
+        let rel_right = trf.transform_point(Vec3::new(
+            self.horizontal_half.to_num(),
+            self.vertical_half.to_num(),
+            0.0,
+        ));
+        [rel_up, rel_right, rel_down, rel_left]
     }
 
     pub fn get_bottom_point(&self) -> FGVec2 {
-        self.bottom
+        FGVec2::new(FGi32::ZERO, FGi32::ZERO)
     }
 }
 
 impl FighterPreviousECB {
     pub fn to_3d_lineloop(&self, trf: Transform) -> [Vec3; 4] {
-        [self.top, self.right, self.bottom, self.left]
+        let rel_up = trf.transform_point(Vec3::new(
-            .map(|point| trf.transform_point(Vec3::new(point.x.to_num(), point.y.to_num(), 0.0)))
+            0.0,
+            (self.vertical_half + self.vertical_half).to_num(),
+            0.0,
+        ));
+        let rel_down = trf.transform_point(Vec3::new(0.0, 0.0, 0.0));
+        let rel_left = trf.transform_point(Vec3::new(
+            (-self.horizontal_half).to_num(),
+            self.vertical_half.to_num(),
+            0.0,
+        ));
+        let rel_right = trf.transform_point(Vec3::new(
+            self.horizontal_half.to_num(),
+            self.vertical_half.to_num(),
+            0.0,
+        ));
+        [rel_up, rel_right, rel_down, rel_left]
     }
 
     pub fn get_bottom_point(&self) -> FGVec2 {
-        self.bottom
+        FGVec2::new(FGi32::ZERO, FGi32::ZERO)
-    }
-}
-
-pub fn update_ecb(
-    query: Query<(
-        &mut FighterECB,
-        &FighterSurfaceState,
-        &FighterECBBoneIndices,
-        &FighterBoneMatrices,
-        &FighterTranslation,
-        &FighterFacingDirection,
-    )>,
-) {
-    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.indices.iter().filter_map(|idx| {
-            let Some((_, bone_matrix)) = bone_matrices.get_by_idx(*idx) else {
-                return None;
-            };
-
-            let pt = trf.transform_point(bone_matrix.get_translation());
-
-            Some(FGVec2::new(pt.x, pt.y) - translation.0)
-        }).collect::<Vec<_>>();
-
-        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"));
-        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);
-        let bottom = FGVec2::new(FGi32::ZERO, min_y);
-        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 { ecb_lock_frames_remaining, .. } = surface_state {
-            *ecb_lock_frames_remaining
-        } else {
-            0
-        };
-
-        ecb.top = top;
-
-        if ecb_lock_frames_remaining == 0 {
-            ecb.bottom = bottom;
-        }
-
-        ecb.left = left;
-        ecb.right = right;
-
-        if surface_state.is_grounded() {
-            ecb.bottom = FGVec2::ZERO;
-        }
-    }
-}
-
-pub fn decrement_ecb_lockout(surface_states: Query<&mut FighterSurfaceState>) {
-    for mut state in surface_states {
-        state.tick_ecb_lock();
-        state.tick_ignored_polygons();
     }
 }
 
@@ -140,16 +92,12 @@ mod tests {
     #[test]
     fn previous_ecb_copies_current_dimensions() {
         let current = FighterECB {
-            bottom: FGVec2::lit("0.0", "-0.5"),
+            vertical_half: FGi32::lit("0.5"),
-            top: FGVec2::lit("0.0", "0.5"),
+            horizontal_half: FGi32::lit("0.25"),
-            left: FGVec2::lit("-0.5", "0.0"),
-            right: FGVec2::lit("0.5", "0.0"),
         };
         let previous = FighterPreviousECB::from(current);
 
-        assert_eq!(previous.top, current.top);
+        assert_eq!(previous.vertical_half, current.vertical_half);
-        assert_eq!(previous.bottom, current.bottom);
+        assert_eq!(previous.horizontal_half, current.horizontal_half);
-        assert_eq!(previous.left, current.left);
-        assert_eq!(previous.right, current.right);
     }
 }

src/fighter/manifest.rs

@@ -65,7 +65,6 @@ pub struct FighterManifest {
     pub animations: HashMap<AnimKind, String>,
     pub attack_scripts: HashMap<AttackKind, String>,
     pub hurtboxes: Vec<FighterHurtbox>,
-    pub ecb_bones: Vec<String>,
 }
 
 #[derive(Resource)]

src/fighter/mod.rs

@@ -18,7 +18,6 @@ pub mod hurtbox;
 pub mod manifest;
 pub mod motion;
 pub mod state;
-pub mod surface;
 pub mod visual;
 
 // The fighter components are re-exported so the rest of the crate can say
@@ -29,9 +28,9 @@ pub use attributes::FighterAttributes;
 pub use ecb::FighterECB;
 pub use manifest::FighterId;
 pub use motion::{
-    FighterPreviousFacingDirection, FighterPreviousTranslation, FighterTranslation, FighterVelocity,
+    FighterPreviousFacingDirection, FighterPreviousTranslation, FighterTranslation,
+    FighterVelocity, Grounded,
 };
-pub use surface::FighterSurfaceState;
 
 use crate::{
     AppState, fighter::{
@@ -39,7 +38,7 @@ use crate::{
             AttackKind, FighterAttackPlugin, FighterAttackScriptAssets, FighterDamage,
             FighterKnockbackVelocity, FighterPendingHitReaction, FighterSolvedHurtboxes,
             FighterStaleMoveQueue,
-        }, baked_animation::{FighterBoneIndexMap, FighterBoneMatrices}, ecb::FighterECBBoneIndices, manifest::FighterManifest, state::{FighterState, air::AirborneStateCommon, fall::FallState}, visual::FighterAnimations,
+        }, baked_animation::{FighterBoneIndexMap, FighterBoneMatrices}, manifest::FighterManifest, state::{FighterState, air::AirborneStateCommon, fall::FallState}, visual::FighterAnimations,
     }, input::FighterInput, math::{int::FGi32, vec::FGVec2}, player::Player, schedule::GameplaySet, scripting::FighterAttackScript, stage::line::StageCollision,
 };
 use state::state_interrupt_system;
@@ -59,14 +58,14 @@ pub enum FighterFacingDirection {
 pub enum FighterHitstopShakeKind {
     #[default]
     Horizontal,
-    Vertical,
+    Vertical
 }
 
 #[derive(Component, Copy, Clone, Hash, Debug, PartialEq, Reflect, Default)]
 pub enum FighterHitstopShakeRole {
     #[default]
     Attacker,
-    Receiver,
+    Receiver
 }
 
 #[derive(Component, Default, Copy, Clone, Hash)]
@@ -74,7 +73,7 @@ pub struct FighterHitstopShake {
     pub remaining_frames: u32,
     pub total_frames: u32,
     pub kind: FighterHitstopShakeKind,
-    pub role: FighterHitstopShakeRole,
+    pub role: FighterHitstopShakeRole
 }
 
 #[derive(Component, Default, Copy, Clone, Hash)]
@@ -134,7 +133,7 @@ pub struct FighterVisual;
     FighterPendingHitReaction,
     FighterHitstop,
     FighterKnockbackVelocity,
-    FighterTranslation
+    FighterTranslation,
 )]
 pub struct Fighter {
     pub manifest: Handle<FighterManifest>,
@@ -171,15 +170,10 @@ impl Plugin for FighterPlugin {
             )*/
             .add_systems(
                 GgrsSchedule,
-                (
+                state::state_collision_interrupt_system.in_set(GameplaySet::Collision),
-                    (ecb::update_ecb, ecb::decrement_ecb_lockout, state::state_collision_interrupt_system).chain(),
-                    baked_animation::update_fighter_bone_matrices,
-                )
-                    .chain()
-                    .in_set(GameplaySet::Collision),
             )
             .add_systems(
-                PostUpdate,
+                Update,
                 (
                     motion::apply_fighter_translation_to_visuals,
                     animation::apply_animation,
@@ -206,8 +200,8 @@ impl Plugin for FighterPlugin {
             .checksum_component_with_hash::<FighterPreviousFacingDirection>()
             .rollback_component_with_copy::<animation::FighterAnimationFrame>()
             .checksum_component_with_hash::<animation::FighterAnimationFrame>()
-            .rollback_component_with_clone::<FighterSurfaceState>()
+            .rollback_component_with_copy::<Grounded>()
-            .checksum_component_with_hash::<FighterSurfaceState>()
+            .checksum_component_with_hash::<Grounded>()
             .rollback_component_with_copy::<FighterFacingDirection>()
             .rollback_component_with_copy::<FighterDamage>()
             .checksum_component_with_hash::<FighterDamage>()
@@ -265,7 +259,7 @@ pub struct FighterActiveAttack {
     pub active_hitboxes: Vec<usize>,
     pub solved_hitboxes: Vec<attack::FighterSolvedHitbox>,
     pub hit_fighters: Vec<Entity>,
-    pub stalled: bool,
+    pub stalled: bool
 }
 
 #[derive(Component, Clone, Debug, Default, Hash)]
@@ -280,7 +274,6 @@ pub fn spawn_fighter(
     animations: FighterAnimations,
     attack_scripts: FighterAttackScriptAssets,
     visual_root: WorldAssetRoot,
-    ecb_bone_indices: Vec<usize>,
 ) -> Entity {
     commands
         .spawn((
@@ -291,14 +284,13 @@ pub fn spawn_fighter(
             Fighter { manifest: manifest },
             FighterFacingDirection::Right,
             FighterPreviousFacingDirection(FighterFacingDirection::Right),
-            FighterSurfaceState::default(),
             Transform::from_scale(Vec3::splat(model_scale.to_num())),
             (
-                FighterECB::default(),
+                FighterECB {
+                    vertical_half: FGi32::lit("5.0"),
+                    horizontal_half: FGi32::lit("2.5"),
+                },
                 FighterHitboxes::default(),
-                FighterECBBoneIndices {
-                    indices: ecb_bone_indices
-                }
             ),
             (
                 FighterVelocity::default(),

src/fighter/motion.rs

@@ -5,16 +5,19 @@ use bevy::prelude::*;
 use bevy_ggrs::GgrsFrameTiming;
 
 use crate::debug_tools::PresentationMotionMode;
-use crate::fighter::FighterHitstopShake;
+use crate::fighter::{FighterHitstopShake};
 use crate::game_settings::GameSettings;
 use crate::{
-    fighter::{FighterFacingDirection, baked_animation::FixedMat4},
+    fighter::{FighterECB, FighterFacingDirection, baked_animation::FixedMat4},
     math::{int::FGi32, vec::FGVec2, vec3::FGVec3},
 };
 
 #[derive(Component, Clone, Copy, Hash)]
 pub struct FighterPreviousFacingDirection(pub FighterFacingDirection);
 
+#[derive(Component, Clone, Copy, Hash)]
+pub struct Grounded;
+
 #[derive(Component, Deref, DerefMut, Default, Debug, Clone, Copy, Hash)]
 pub struct FighterVelocity(pub FGVec2);
 
@@ -56,6 +59,7 @@ pub fn apply_fighter_translation_to_visuals(
     query: Query<(
         &FighterTranslation,
         &FighterPreviousTranslation,
+        &FighterECB,
         &FighterHitstopShake,
         &mut Transform,
     )>,
@@ -64,42 +68,33 @@ pub fn apply_fighter_translation_to_visuals(
     game_settings: Res<GameSettings>,
 ) {
     let overstep_fraction = timing.overstep_fraction();
-    for (translation, previous_translation, hitstop_shake, mut transform) in query {
+    for (translation, previous_translation, ecb, hitstop_shake, mut transform) in query {
         let translation = sample_presentation_translation(
             *previous_translation,
             *translation,
             overstep_fraction,
             debug_settings.motion_sampling,
         );
+        let bottom = ecb.get_bottom_point();
         transform.translation = Vec3::new(
-            translation.x,
+            translation.x + bottom.x.to_num::<f32>(),
-            translation.y,
+            translation.y + bottom.y.to_num::<f32>(),
             0.0,
         );
 
-        if hitstop_shake.remaining_frames > 0
+        if hitstop_shake.remaining_frames > 0 && hitstop_shake.total_frames > 0 && !game_settings.fighter_common.visual_shake_table.is_empty() {
-            && hitstop_shake.total_frames > 0
-            && !game_settings.fighter_common.visual_shake_table.is_empty()
-        {
             let total = hitstop_shake.total_frames as f32;
             let curr = hitstop_shake.remaining_frames as f32;
             let elapsed = 1.0 - curr / total;
 
-            let access_index = (hitstop_shake.remaining_frames as usize)
+            
-                % game_settings.fighter_common.visual_shake_table.len();
+            let access_index = (hitstop_shake.remaining_frames as usize) % game_settings.fighter_common.visual_shake_table.len();
             let shake_multiplier = match hitstop_shake.role {
-                super::FighterHitstopShakeRole::Attacker => {
+                super::FighterHitstopShakeRole::Attacker => game_settings.fighter_common.attacker_visual_shake_multiplier,
-                    game_settings
-                        .fighter_common
-                        .attacker_visual_shake_multiplier
-                }
                 super::FighterHitstopShakeRole::Receiver => 1.0,
             };
-            let shake_amount: f32 =
+            let shake_amount: f32 = 1.0 - EaseFunction::QuinticIn.sample(elapsed).unwrap_or_default();
-                1.0 - EaseFunction::QuinticIn.sample(elapsed).unwrap_or_default();
+            let shake_amount = game_settings.fighter_common.visual_shake_table[access_index] * shake_amount * shake_multiplier;
-            let shake_amount = game_settings.fighter_common.visual_shake_table[access_index]
-                * shake_amount
-                * shake_multiplier;
 
             let shake_offset = match hitstop_shake.kind {
                 super::FighterHitstopShakeKind::Horizontal => Vec3::new(shake_amount, 0.0, 0.0),

src/fighter/state/air.rs

@@ -1,3 +1,4 @@
+use crate::fighter::state::ground::GroundedStateCommon;
 use crate::fighter::state::land::{LandingState, LandingType};
 use crate::fighter::state::{CollisionContext, FighterState};
 use crate::fighter::*;
@@ -29,7 +30,7 @@ pub fn process_fast_fall(
 pub fn integrate_gravity(
     velocity: &mut FighterVelocity,
     attributes: &FighterAttributes,
-    fast_fall: bool,
+    fast_fall: bool
 ) {
     velocity.y -= attributes.gravity;
 
@@ -93,23 +94,10 @@ pub fn update_standard_motion(
     ctx: &mut crate::fighter::state::UpdateContext,
     airborne_common: &mut AirborneStateCommon,
 ) {
-    process_fast_fall(
+    process_fast_fall(airborne_common, ctx.input, &mut ctx.velocity, ctx.fighter_attributes);
-        airborne_common,
+    integrate_gravity(ctx.velocity, ctx.fighter_attributes, airborne_common.is_fast_falling);
-        ctx.input,
-        &mut ctx.velocity,
-        ctx.fighter_attributes,
-    );
-    integrate_gravity(
-        ctx.velocity,
-        ctx.fighter_attributes,
-        airborne_common.is_fast_falling,
-    );
     apply_air_drift(ctx.velocity, ctx.fighter_attributes, ctx.input);
-    apply_air_motion(
+    apply_air_motion(ctx.velocity, ctx.translation, ctx.prev_translation);
-        ctx.velocity,
-        ctx.translation,
-        ctx.prev_translation,
-    );
 }
 
 pub fn collision_interrupt(
@@ -117,14 +105,14 @@ pub fn collision_interrupt(
     landing_type: LandingType,
 ) -> Option<FighterState> {
     let res = ctx.air_collide_with_stage()?;
-    let diff = res.hit_position - ctx.translation.0;
+    ctx.translation.0 = res.hit_position - ctx.ecb.get_bottom_point();
-    ctx.ecb.bottom -= diff;
+    let grounded_common = GroundedStateCommon {
-    ctx.ecb.top -= diff;
+        current_line_id: res.line_id,
-    ctx.ecb.left -= diff;
+    };
-    ctx.ecb.right -= diff;
+    Some(FighterState::Land(LandingState::create(
-    ctx.translation.0 = res.hit_position;
+        grounded_common,
-    ctx.surface.land(res.line_id);
+        landing_type,
-    Some(FighterState::Land(LandingState::create(landing_type)))
+    )))
 }
 
 #[cfg(test)]

src/fighter/state/air_dodge.rs

@@ -1,16 +1,9 @@
 use crate::{
     fighter::{
-        animation::AnimKind,
+        animation::AnimKind, state::{
-        state::{
+            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext, UpdateContext, air::{self, AirborneStateCommon}, fall::FallState, land::LandingType,
-            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext,
-            UpdateContext,
-            air::{self, AirborneStateCommon},
-            fall::FallState,
-            land::LandingType,
         },
-    },
+    }, input, math::vec::FGVec2,
-    input,
-    math::vec::FGVec2,
 };
 
 #[derive(Debug, Clone, Hash)]
@@ -23,9 +16,7 @@ impl FighterStateImpl for AirDodgeState {
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
         if state_context.is_current_animation_finished() {
-            Some(FighterState::Fall(FallState::new(
+            Some(FighterState::Fall(FallState::new(AirborneStateCommon::default())))
-                AirborneStateCommon::default(),
-            )))
         } else {
             None
         }
@@ -54,14 +45,12 @@ impl FighterStateImpl for AirDodgeState {
         state_context.velocity.0 =
             self.direction * state_context.fighter_attributes.air_dodge_velocity;
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         false
     }
-
-    fn surface_policy(&self) -> super::SurfacePolicy {
-        super::SurfacePolicy::Airborne(crate::fighter::surface::EcbLockPolicy::StartOnDetach)
-    }
 }
 
 pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {

src/fighter/state/crouch.rs

@@ -1,160 +0,0 @@
-use super::{
-    CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext, ground,
-};
-use crate::fighter::FighterSurfaceState;
-use crate::fighter::animation::AnimKind;
-use crate::fighter::state::air::AirborneStateCommon;
-use crate::fighter::state::ground::{
-    grounded_movement_common_interrupts, grounded_movement_standstill_common_interrupts,
-};
-use crate::fighter::state::platform_pass::PlatformPassState;
-use crate::fighter::state::{FighterState, dash, ground_attack, turn, walk};
-use crate::input::FighterCommands;
-use crate::stage::line::StagePolyType;
-
-#[derive(Debug, Clone, Hash)]
-pub enum CrouchSubState {
-    Entering { pass_queued: bool },
-    Idle,
-    Exiting,
-}
-
-#[derive(Debug, Clone, Hash)]
-pub struct CrouchState {
-    sub_state: CrouchSubState,
-}
-
-pub fn crouch_idle_interrupts(state_context: &InterruptContext) -> Option<FighterState> {
-    if let Some(state) = ground_attack::check_interrupt(state_context) {
-        Some(state)
-    } else if let Some(state) = dash::check_input(state_context) {
-        Some(state)
-    } else if let Some(state) = turn::check_input(state_context) {
-        Some(state)
-    } else if let Some(state) = walk::check_input(state_context) {
-        Some(state)
-    } else {
-        None
-    }
-}
-
-pub fn crouch_entering_interrupts(state_context: &InterruptContext) -> Option<FighterState> {
-    if let Some(state) = ground_attack::check_interrupt(state_context) {
-        Some(state)
-    } else {
-        None
-    }
-}
-
-impl FighterStateImpl for CrouchState {
-    const NAME: &'static str = "Crouch";
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if let Some(state) = grounded_movement_common_interrupts(state_context) {
-            return Some(state);
-        }
-
-        match self.sub_state {
-            CrouchSubState::Entering { pass_queued } => {
-                // pass
-                if let FighterSurfaceState::Grounded { line_id } = state_context.surface {
-                    if let Some(stage_poly) = state_context
-                        .stage_collision
-                        .stage_polys
-                        .get(line_id.polygon)
-                    {
-                        let is_inputting_crouch = -state_context.game_settings.input_common.run_stick_threshold > state_context.input.get_last_frame().movement.y;
-                        let is_on_a_soft_platform = matches!(stage_poly.poly_type, StagePolyType::Platform);
-                        if pass_queued && is_inputting_crouch && is_on_a_soft_platform 
-                        {
-                            return Some(FighterState::PlatformPass(PlatformPassState::new(
-                                AirborneStateCommon::default(),
-                                line_id.polygon,
-                            )));
-                        }
-                    }
-                }
-
-                // While entering the crouch animation we do not allow movement inputs, but we do allow attacks and jumps
-                if state_context.is_current_animation_finished() {
-                    return Some(FighterState::Crouch(CrouchState {
-                        sub_state: CrouchSubState::Idle,
-                    }));
-                } else {
-                    return crouch_entering_interrupts(state_context);
-                }
-            }
-            CrouchSubState::Idle => {
-                if state_context.input.get_last_frame().movement.y
-                    > -state_context.game_settings.input_common.run_stick_threshold
-                {
-                    return Some(FighterState::Crouch(CrouchState {
-                        sub_state: CrouchSubState::Exiting,
-                    }));
-                } else {
-                    return crouch_idle_interrupts(state_context);
-                }
-            }
-            CrouchSubState::Exiting => {
-                if state_context.is_current_animation_finished() {
-                    return grounded_movement_standstill_common_interrupts(state_context);
-                } else {
-                    return crouch_idle_interrupts(state_context);
-                }
-            }
-        }
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        match self.sub_state {
-            CrouchSubState::Entering { .. } => {
-                state_context.play_animation(AnimKind::CrouchEnter, false);
-            }
-            CrouchSubState::Idle => {
-                state_context.play_animation(AnimKind::CrouchIdle, true);
-            }
-            CrouchSubState::Exiting => {
-                state_context.play_animation(AnimKind::CrouchExit, false);
-            }
-        }
-    }
-
-    fn update(&mut self, state_context: &mut UpdateContext) {
-        if let CrouchSubState::Entering {
-            pass_queued,
-        } = &mut self.sub_state
-        {
-            if state_context
-                .input
-                .has_command(FighterCommands::SmashMoveDown)
-            {
-                state_context
-                    .input
-                    .clear_command(FighterCommands::SmashMoveDown);
-                *pass_queued = true;
-            }
-        }
-        ground::update_friction_motion(state_context);
-    }
-
-    fn check_collision_interrupt(
-        &mut self,
-        state_context: &mut CollisionContext,
-    ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, false)
-    }
-
-    fn is_visually_grounded<'a>(&'a self) -> bool {
-        true
-    }
-}
-
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
-    let input_frame = state_context.input.get_last_frame();
-
-    if input_frame.movement.y <= -state_context.game_settings.input_common.run_stick_threshold {
-        return Some(FighterState::Crouch(CrouchState {
-            sub_state: CrouchSubState::Entering { pass_queued: false },
-        }));
-    }
-    None
-}

src/fighter/state/dash.rs

@@ -5,43 +5,52 @@ use super::{
 use crate::fighter::FighterFacingDirection;
 use crate::fighter::animation::AnimKind;
 use crate::fighter::state::FighterState;
+use crate::fighter::state::ground::GroundedStateCommon;
 use crate::input::FighterCommands::{SmashMoveLeft, SmashMoveRight};
 
 #[derive(Debug, Clone, Hash)]
 pub struct DashState {
     direction: FighterFacingDirection,
+    pub ground_common: GroundedStateCommon,
 }
 
 impl DashState {
-    pub fn new(direction: FighterFacingDirection) -> Self {
+    pub fn new(direction: FighterFacingDirection, ground_common: GroundedStateCommon) -> Self {
-        Self { direction }
+        Self {
+            direction,
+            ground_common,
+        }
     }
 }
 
 impl FighterStateImpl for DashState {
     const NAME: &'static str = "Dash";
     fn check_interrupt(&self, ctx: &mut InterruptContext) -> Option<FighterState> {
+        let ground = &self.ground_common;
         let attributes = ctx.fighter_attributes;
 
         // A reverse dash can interrupt before IASA
         if let Some(direction) =
             check_smash_input_with_dir(ctx).filter(|direction| *direction != self.direction)
         {
-            return Some(FighterState::Dash(DashState::new(direction)));
+            return Some(FighterState::Dash(DashState::new(
+                direction,
+                ground.clone(),
+            )));
         }
 
-        if let Some(state) = ground::grounded_movement_common_interrupts(ctx) {
+        if let Some(state) = ground::grounded_movement_common_interrupts(ctx, ground) {
             return Some(state);
         }
 
         if ctx.is_current_animation_finished() {
-            return run::check_input(ctx)
+            return run::check_input(ctx, ground)
-                .or_else(|| walk::check_input(ctx))
+                .or_else(|| walk::check_input(ctx, ground))
-                .or_else(|| wait::check_input(ctx));
+                .or_else(|| wait::check_input(ctx, ground));
         }
 
         if ctx.get_current_animation_frame() > attributes.dash_acceleration_duration {
-            return run::check_input(ctx);
+            return run::check_input(ctx, ground);
         }
 
         None
@@ -97,10 +106,12 @@ impl FighterStateImpl for DashState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, true)
+        ground::collision_interrupt(state_context, &mut self.ground_common, true)
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
@@ -115,6 +126,10 @@ fn check_smash_input_with_dir(state_context: &InterruptContext) -> Option<Fighte
     }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
-    check_smash_input_with_dir(state_context).map(|dir| FighterState::Dash(DashState::new(dir)))
+    state_context: &InterruptContext,
+    ground_common: &GroundedStateCommon,
+) -> Option<FighterState> {
+    check_smash_input_with_dir(state_context)
+        .map(|dir| FighterState::Dash(DashState::new(dir, ground_common.clone())))
 }

src/fighter/state/fall.rs

@@ -46,8 +46,5 @@ impl FighterStateImpl for FallState {
     ) -> bool {
         false
     }
-
-    fn surface_policy(&self) -> super::SurfacePolicy {
-        super::SurfacePolicy::Airborne(crate::fighter::surface::EcbLockPolicy::StartOnDetach)
-    }
 }
+

src/fighter/state/ground.rs

@@ -3,7 +3,7 @@
 //! bit-for-bit deterministic for rollback.
 
 use crate::fighter::state::{
-    CollisionContext, FighterState, InterruptContext, air, crouch, dash, fall, ground_attack, turn, wait, walk,
+    CollisionContext, FighterState, InterruptContext, air, dash, fall, ground_attack, turn, wait, walk,
 };
 use crate::fighter::{
     FighterAttributes, FighterPreviousTranslation, FighterTranslation, FighterVelocity,
@@ -13,6 +13,13 @@ use crate::math::int::{FGWide, FGi32};
 use crate::math::vec::FGVec2;
 use crate::stage::line::{StageLineID, StagePoly, StagePolyLineSegment, StagePolyLineSegmentType};
 
+use bevy::prelude::*;
+
+#[derive(Reflect, Hash, Clone, Debug)]
+pub struct GroundedStateCommon {
+    pub current_line_id: StageLineID,
+}
+
 pub fn apply_grounded_friction(friction: FGi32, ground_vel: FGi32) -> FGi32 {
     if friction.abs() > ground_vel.abs() {
         -ground_vel
@@ -174,23 +181,22 @@ pub fn update_friction_motion(ctx: &mut crate::fighter::state::UpdateContext) {
 
 pub fn collide_with_stage_grounded(
     state_context: &mut CollisionContext,
+    ground_common: &mut GroundedStateCommon,
     can_walk_off: bool,
 ) -> GroundedMotionResult {
     let translation = &mut state_context.translation;
-    let ecb = &state_context.ecb;
+    let ecb = state_context.ecb;
     let stage_collision = state_context.stage_collision;
 
-    let Some(current_line_id) = state_context.surface.line_id() else {
+    let stage_poly = stage_collision
-        return GroundedMotionResult::InAir;
+        .stage_polys
-    };
+        .get(ground_common.current_line_id.polygon);
-
-    let stage_poly = stage_collision.stage_polys.get(current_line_id.polygon);
 
     if let Some(stage_poly) = stage_poly {
         let ecb_bottom_pos = translation.0 + ecb.get_bottom_point();
         match resolve_grounded_position(
             stage_poly,
-            current_line_id.segment,
+            ground_common.current_line_id.segment,
             ecb_bottom_pos,
             can_walk_off,
         ) {
@@ -210,45 +216,31 @@ pub fn collide_with_stage_grounded(
                             .0
                             .project_onto_normalized(current_segment.normal)
                 };
-                state_context.surface.land(StageLineID {
+                ground_common.current_line_id.segment = segment_idx;
-                    polygon: current_line_id.polygon,
-                    segment: segment_idx,
-                });
                 GroundedMotionResult::InGround
             }
-            GroundedPositionResult::InAir => {
+            GroundedPositionResult::InAir => GroundedMotionResult::InAir,
-                state_context.surface.apply_airborne_policy(
-                    crate::fighter::surface::EcbLockPolicy::StartOnDetach,
-                    state_context.leave_ground_ecb_lock_duration,
-                );
-                GroundedMotionResult::InAir
-            }
         }
     } else {
-        state_context.surface.apply_airborne_policy(
-            crate::fighter::surface::EcbLockPolicy::StartOnDetach,
-            state_context.leave_ground_ecb_lock_duration,
-        );
         GroundedMotionResult::InAir
     }
 }
 
-pub fn collision_interrupt(ctx: &mut CollisionContext, can_walk_off: bool) -> Option<FighterState> {
+pub fn collision_interrupt(
-    match collide_with_stage_grounded(ctx, can_walk_off) {
+    ctx: &mut CollisionContext,
+    common: &mut GroundedStateCommon,
+    can_walk_off: bool,
+) -> Option<FighterState> {
+    match collide_with_stage_grounded(ctx, common, can_walk_off) {
         GroundedMotionResult::InGround => None,
-        GroundedMotionResult::InAir => Some(FighterState::Fall(fall::FallState::new(
+        GroundedMotionResult::InAir => Some(FighterState::Fall(fall::FallState::new(air::AirborneStateCommon::default()))),
-            air::AirborneStateCommon::default(),
-        ))),
     }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::fighter::ecb::FighterPreviousECB;
-    use crate::fighter::{FighterECB, FighterSurfaceState};
     use crate::stage::line::StagePolyType;
-    use crate::input::FighterInput;
 
     fn two_segment_floor() -> StagePoly {
         StagePoly::build(
@@ -354,122 +346,28 @@ mod tests {
             GroundedPositionResult::InAir
         ));
     }
-
-    #[test]
-    fn grounded_collision_updates_surface_segment() {
-        let stage_collision = crate::stage::line::StageCollision {
-            stage_polys: vec![two_segment_floor()],
-        };
-        let mut surface = FighterSurfaceState::Grounded {
-            line_id: StageLineID {
-                polygon: 0,
-                segment: 0,
-            },
-        };
-        let mut translation = FighterTranslation(FGVec2::lit("11", "0"));
-        let previous_translation = FighterPreviousTranslation(translation.0);
-        let mut velocity = FighterVelocity::default();
-        let mut ecb = FighterECB {
-            bottom: FGVec2::lit("0.0", "-0.5"),
-            top: FGVec2::lit("0.0", "0.5"),
-            left: FGVec2::lit("-0.5", "0.0"),
-            right: FGVec2::lit("0.5", "0.0"),
-        };
-        let previous_ecb = FighterPreviousECB::from(ecb);
-        let mut context = CollisionContext {
-            translation: &mut translation,
-            prev_translation: &previous_translation,
-            input: &FighterInput::default(),
-            velocity: &mut velocity,
-            surface: &mut surface,
-            ecb: &mut ecb,
-            prev_ecb: &previous_ecb,
-            stage_collision: &stage_collision,
-            leave_ground_ecb_lock_duration: 10,
-            downward_stick_threshold: FGi32::ONE,
-        };
-
-        assert!(matches!(
-            collide_with_stage_grounded(&mut context, true),
-            GroundedMotionResult::InGround
-        ));
-        assert_eq!(
-            surface.line_id(),
-            Some(StageLineID {
-                polygon: 0,
-                segment: 1,
-            })
-        );
-    }
-
-    #[test]
-    fn walking_off_edge_clears_surface_contact() {
-        let stage_collision = crate::stage::line::StageCollision {
-            stage_polys: vec![StagePoly::build(
-                StagePolyType::Platform,
-                &[
-                    (FGVec2::lit("0", "0"), StagePolyLineSegmentType::Floor),
-                    (FGVec2::lit("10", "0"), StagePolyLineSegmentType::Floor),
-                ],
-            )],
-        };
-        let mut surface = FighterSurfaceState::Grounded {
-            line_id: StageLineID {
-                polygon: 0,
-                segment: 0,
-            },
-        };
-        let mut translation = FighterTranslation(FGVec2::lit("11", "0"));
-        let previous_translation = FighterPreviousTranslation(translation.0);
-        let mut velocity = FighterVelocity::default();
-        let mut ecb = FighterECB {
-            bottom: FGVec2::lit("0.0", "-0.5"),
-            top: FGVec2::lit("0.0", "0.5"),
-            left: FGVec2::lit("-0.5", "0.0"),
-            right: FGVec2::lit("0.5", "0.0"),
-        };
-        let previous_ecb = FighterPreviousECB::from(ecb);
-        let mut context = CollisionContext {
-            translation: &mut translation,
-            prev_translation: &previous_translation,
-            input: &FighterInput::default(),
-            velocity: &mut velocity,
-            surface: &mut surface,
-            ecb: &mut ecb,
-            prev_ecb: &previous_ecb,
-            stage_collision: &stage_collision,
-            leave_ground_ecb_lock_duration: 10,
-            downward_stick_threshold: FGi32::ONE,
-        };
-
-        assert!(matches!(
-            collide_with_stage_grounded(&mut context, true),
-            GroundedMotionResult::InAir
-        ));
-        assert!(matches!(surface, FighterSurfaceState::Airborne { .. }));
-    }
 }
 
 pub fn grounded_movement_common_interrupts(
     state_context: &InterruptContext,
+    ground_common: &GroundedStateCommon,
 ) -> Option<FighterState> {
-    super::jump::check_input(state_context)
+    super::jump::check_input(state_context, ground_common)
 }
 
 pub fn grounded_movement_standstill_common_interrupts(
     state_context: &InterruptContext,
+    ground_common: &GroundedStateCommon,
 ) -> Option<FighterState> {
-    if let Some(state) = ground_attack::check_interrupt(state_context) {
+    if let Some(state) = ground_attack::check_interrupt(state_context, &ground_common) {
         Some(state)
-    } else if let Some(state) = dash::check_input(state_context) {
+    } else if let Some(state) = dash::check_input(state_context, &ground_common) {
         Some(state)
-    } else if let Some(state) = turn::check_input(state_context) {
+    } else if let Some(state) = turn::check_input(state_context, &ground_common) {
         Some(state)
-    } else if let Some(state) = crouch::check_input(state_context) {
+    } else if let Some(state) = walk::check_input(state_context, &ground_common) {
         Some(state)
-    } else if let Some(state) = walk::check_input(state_context) {
+    } else if let Some(state) = wait::check_input(state_context, &ground_common) {
-        Some(state)
-    } else if let Some(state) = wait::check_input(state_context) {
         Some(state)
     } else {
         None

src/fighter/state/ground_attack.rs

@@ -2,13 +2,14 @@ use crate::fighter::{
     attack::{AttackKind, update_active_hitbox_list},
     state::{
         CollisionContext, EnterContext, ExitContext, FighterState, FighterStateImpl,
-        InterruptContext, UpdateContext, wait::WaitState,
+        InterruptContext, UpdateContext, ground::GroundedStateCommon, wait::WaitState,
     },
 };
 
 #[derive(Clone, Debug, Hash)]
 pub struct GroundAttackState {
     pub attack_kind: AttackKind,
+    pub grounded_common: GroundedStateCommon,
 }
 
 impl FighterStateImpl for GroundAttackState {
@@ -16,7 +17,9 @@ impl FighterStateImpl for GroundAttackState {
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
         if state_context.is_current_animation_finished() {
-            Some(FighterState::Wait(WaitState))
+            Some(FighterState::Wait(WaitState {
+                grounded_common: self.grounded_common.clone(),
+            }))
         } else {
             None
         }
@@ -50,7 +53,7 @@ impl FighterStateImpl for GroundAttackState {
             active_hitboxes: Vec::new(),
             solved_hitboxes: Vec::new(),
             hit_fighters: Vec::new(),
-            stalled: false,
+            stalled: false
         });
     }
 
@@ -64,13 +67,18 @@ impl FighterStateImpl for GroundAttackState {
     ) -> Option<FighterState> {
         None
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
 
-pub fn check_interrupt(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_interrupt(
+    state_context: &InterruptContext,
+    grounded_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     if state_context
         .input
         .has_command(crate::input::FighterCommands::Attack)
@@ -81,6 +89,7 @@ pub fn check_interrupt(state_context: &InterruptContext) -> Option<FighterState>
             .to_attack_kind_grounded();
         Some(FighterState::GroundAttack(GroundAttackState {
             attack_kind,
+            grounded_common: grounded_common.clone(),
         }))
     } else {
         None

src/fighter/state/hitstun.rs

@@ -7,7 +7,7 @@ use crate::{
             InterruptContext, UpdateContext,
             air::{self, AirborneStateCommon},
             fall::FallState,
-            ground::collision_interrupt,
+            ground::{GroundedStateCommon, collision_interrupt},
             land::LandingType,
             wait::WaitState,
         },
@@ -17,7 +17,7 @@ use crate::{
 
 #[derive(Clone, Debug, Hash)]
 pub enum HitstopStateKind {
-    Grounded,
+    Grounded(GroundedStateCommon),
     Airborne,
 }
 
@@ -43,7 +43,7 @@ impl FighterStateImpl for HitstunState {
 
     fn name(&self) -> String {
         let hitstop_kind = match self.hitstop_kind {
-            HitstopStateKind::Grounded => "Grounded",
+            HitstopStateKind::Grounded(_) => "Grounded",
             HitstopStateKind::Airborne => "Airborne",
         };
 
@@ -58,10 +58,14 @@ impl FighterStateImpl for HitstunState {
     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::Grounded(grounded_state_common) => {
-                HitstopStateKind::Airborne => Some(FighterState::Fall(FallState::new(
+                    Some(FighterState::Wait(WaitState {
-                    AirborneStateCommon::default(),
+                        grounded_common: grounded_state_common.clone(),
-                ))),
+                    }))
+                }
+                HitstopStateKind::Airborne => {
+                    Some(FighterState::Fall(FallState::new(AirborneStateCommon::default())))
+                }
             }
         } else {
             None
@@ -81,7 +85,7 @@ impl FighterStateImpl for HitstunState {
         }
 
         match self.hitstop_kind {
-            HitstopStateKind::Grounded => {}
+            HitstopStateKind::Grounded(_) => {}
             HitstopStateKind::Airborne => {
                 air::integrate_gravity(ctx.velocity, ctx.fighter_attributes, false);
             }
@@ -99,7 +103,7 @@ impl FighterStateImpl for HitstunState {
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         let animation = match self.hitstop_kind {
-            HitstopStateKind::Grounded => AnimKind::FlinchGround,
+            HitstopStateKind::Grounded(_) => AnimKind::FlinchGround,
             HitstopStateKind::Airborne => AnimKind::FlinchAir,
         };
         state_context.play_animation(animation, false);
@@ -112,7 +116,9 @@ impl FighterStateImpl for HitstunState {
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
         match &mut self.hitstop_kind {
-            HitstopStateKind::Grounded => collision_interrupt(state_context, true),
+            HitstopStateKind::Grounded(grounded_state_common) => {
+                collision_interrupt(state_context, grounded_state_common, true)
+            }
             HitstopStateKind::Airborne => {
                 air::collision_interrupt(state_context, LandingType::Normal)
             }
@@ -121,17 +127,8 @@ impl FighterStateImpl for HitstunState {
 
     fn is_visually_grounded<'a>(&'a self) -> bool {
         match self.hitstop_kind {
-            HitstopStateKind::Grounded => true,
+            HitstopStateKind::Grounded(_) => true,
             HitstopStateKind::Airborne => false,
         }
     }
-
-    fn surface_policy(&self) -> super::SurfacePolicy {
-        match self.hitstop_kind {
-            HitstopStateKind::Grounded => super::SurfacePolicy::Grounded,
-            HitstopStateKind::Airborne => super::SurfacePolicy::Airborne(
-                crate::fighter::surface::EcbLockPolicy::StartOnDetach,
-            ),
-        }
-    }
 }

src/fighter/state/jump.rs

@@ -2,17 +2,10 @@ use bevy::prelude::*;
 
 use crate::{
     fighter::{
-        animation::AnimKind,
+        animation::AnimKind, state::{
-        state::{
+            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext, UpdateContext, air::{self, AirborneStateCommon}, air_dodge::{self, AirDodgeState}, ground::{self, GroundedStateCommon},
-            CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext,
-            UpdateContext,
-            air::{self, AirborneStateCommon},
-            air_dodge::{self, AirDodgeState},
-            ground,
         },
-    },
+    }, input::FighterCommands, math::{int::FGi32, vec::FGVec2},
-    input::FighterCommands,
-    math::{int::FGi32, vec::FGVec2},
 };
 #[derive(Debug, Hash, Clone, Copy)]
 pub enum JumpType {
@@ -29,12 +22,14 @@ pub struct JumpState {
 
 #[derive(Debug, Clone, Hash)]
 pub struct JumpSquatState {
+    pub grounded_common: GroundedStateCommon,
     pub duration_counter: u32,
 }
 
 impl JumpSquatState {
-    pub fn create() -> Self {
+    pub fn create(grounded_common: GroundedStateCommon) -> Self {
         Self {
+            grounded_common,
             duration_counter: 0,
         }
     }
@@ -74,10 +69,7 @@ impl FighterStateImpl for JumpSquatState {
             } else {
                 JumpType::ShortHop
             };
-            Some(FighterState::Jump(JumpState {
+            Some(FighterState::Jump(JumpState { jump_type, airborne_state_common: AirborneStateCommon::default() }))
-                jump_type,
-                airborne_state_common: AirborneStateCommon::default(),
-            }))
         } else {
             None
         }
@@ -92,15 +84,17 @@ impl FighterStateImpl for JumpSquatState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, false)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, false)
     }
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.play_animation(AnimKind::JumpSquat, false);
         state_context.input.clear_command(FighterCommands::Jump);
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
@@ -111,7 +105,7 @@ impl FighterStateImpl for JumpState {
         if state_context.input.has_command(FighterCommands::Jump) {
             Some(FighterState::Jump(JumpState {
                 jump_type: JumpType::DoubleJump,
-                airborne_state_common: AirborneStateCommon::default(),
+                airborne_state_common: AirborneStateCommon::default()
             }))
         } else {
             air_dodge::check_input(state_context)
@@ -182,27 +176,22 @@ impl FighterStateImpl for JumpState {
             crate::fighter::state::land::LandingType::Normal,
         )
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         false
     }
-
-    fn surface_policy(&self) -> super::SurfacePolicy {
-        use crate::fighter::surface::EcbLockPolicy;
-        match self.jump_type {
-            JumpType::DoubleJump => super::SurfacePolicy::Airborne(EcbLockPolicy::Restart),
-            JumpType::ShortHop | JumpType::LongJump => {
-                super::SurfacePolicy::Airborne(EcbLockPolicy::StartOnDetach)
-            }
-        }
-    }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
+    state_context: &InterruptContext,
+    ground_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     state_context
         .input
         .has_command(FighterCommands::Jump)
-        .then(|| FighterState::JumpSquat(JumpSquatState::create()))
+        .then(|| FighterState::JumpSquat(JumpSquatState::create(ground_common.clone())))
 }
 
 pub fn check_input_double_jump(state_context: &InterruptContext) -> Option<FighterState> {
@@ -212,7 +201,7 @@ pub fn check_input_double_jump(state_context: &InterruptContext) -> Option<Fight
         .then(|| {
             FighterState::Jump(JumpState {
                 jump_type: JumpType::DoubleJump,
-                airborne_state_common: AirborneStateCommon::default(),
+                airborne_state_common: AirborneStateCommon::default()
             })
         })
 }

src/fighter/state/land.rs

@@ -3,7 +3,7 @@ use crate::fighter::{
     state::{
         CollisionContext, EnterContext, FighterState, FighterStateImpl, InterruptContext,
         UpdateContext, dash,
-        ground::{self, grounded_movement_standstill_common_interrupts},
+        ground::{self, GroundedStateCommon, grounded_movement_standstill_common_interrupts},
         walk,
     },
 };
@@ -16,12 +16,16 @@ pub enum LandingType {
 
 #[derive(Debug, Clone, Hash)]
 pub struct LandingState {
+    pub grounded_common: GroundedStateCommon,
     pub landing_type: LandingType,
 }
 
 impl LandingState {
-    pub fn create(landing_type: LandingType) -> Self {
+    pub fn create(grounded_common: GroundedStateCommon, landing_type: LandingType) -> Self {
-        Self { landing_type }
+        Self {
+            grounded_common,
+            landing_type,
+        }
     }
 }
 
@@ -30,14 +34,14 @@ impl FighterStateImpl for LandingState {
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
         if state_context.is_current_animation_finished() {
-            grounded_movement_standstill_common_interrupts(state_context)
+            grounded_movement_standstill_common_interrupts(state_context, &self.grounded_common)
         } else if state_context.get_current_animation_frame()
             >= state_context.fighter_attributes.landing_iasa
             && let LandingType::Normal = self.landing_type
         {
-            dash::check_input(state_context).or_else(|| {
+            dash::check_input(state_context, &self.grounded_common).or_else(|| {
-                ground::grounded_movement_common_interrupts(state_context)
+                ground::grounded_movement_common_interrupts(state_context, &self.grounded_common)
-                    .or_else(|| walk::check_input(state_context))
+                    .or_else(|| walk::check_input(state_context, &self.grounded_common))
             })
         } else {
             None
@@ -52,7 +56,7 @@ impl FighterStateImpl for LandingState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, true)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, true)
     }
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
@@ -65,8 +69,10 @@ impl FighterStateImpl for LandingState {
             }
         };
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }

src/fighter/state/mod.rs

@@ -7,8 +7,7 @@ use bevy::prelude::*;
 
 use crate::fighter::animation::{AnimKind, FighterAnimationFrame};
 use crate::fighter::attack::{
-    FighterAttackScriptAssets, FighterKnockbackVelocity, FighterPendingHitReaction,
+    FighterAttackScriptAssets, FighterKnockbackVelocity, FighterPendingHitReaction, FighterStaleMoveQueue, HitStop,
-    FighterStaleMoveQueue, HitStop,
 };
 use crate::fighter::attributes::FighterAttributes;
 use crate::fighter::baked_animation::BakedFighterAnimations;
@@ -17,11 +16,8 @@ use crate::fighter::manifest::FighterManifest;
 use crate::fighter::state::hitstun::HitstunState;
 use crate::fighter::visual::FighterAnimations;
 use crate::fighter::{
-    Fighter, FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop,
+    Fighter, FighterECB, FighterFacingDirection, FighterHitboxes, FighterHitstop, FighterHitstopShake, FighterHitstopShakeKind, FighterHitstopShakeRole, FighterPreviousTranslation, FighterTranslation, FighterVelocity,
-    FighterHitstopShake, FighterHitstopShakeKind, FighterHitstopShakeRole,
-    FighterPreviousTranslation, FighterSurfaceState, FighterTranslation, FighterVelocity,
 };
-use crate::fighter::surface::EcbLockPolicy;
 use crate::game_settings::GameSettings;
 use crate::input::FighterInput;
 use crate::math::int::FGi32;
@@ -41,14 +37,6 @@ pub mod run;
 pub mod turn;
 pub mod wait;
 pub mod walk;
-pub mod crouch;
-pub mod platform_pass;
-
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
-pub enum SurfacePolicy {
-    Grounded,
-    Airborne(EcbLockPolicy),
-}
 
 macro_rules! fighter_states {
     ($($variant:ident => $ty:ty),* $(,)?) => {
@@ -81,10 +69,6 @@ macro_rules! fighter_states {
             pub fn is_visually_grounded(&self) -> bool {
                 match self { $(Self::$variant(s) => s.is_visually_grounded()),* }
             }
-
-            pub fn surface_policy(&self) -> SurfacePolicy {
-                match self { $(Self::$variant(s) => s.surface_policy()),* }
-            }
         }
 
         $(impl From<$ty> for FighterState {
@@ -111,11 +95,9 @@ pub trait FighterStateImpl: Sized {
         None
     }
 
-    fn is_visually_grounded<'a>(&'a self) -> bool;
+    fn is_visually_grounded<'a>(
-
+        &'a self,
-    fn surface_policy(&self) -> SurfacePolicy {
+    ) -> bool;
-        SurfacePolicy::Grounded
-    }
 }
 
 pub struct AnimationStatus {
@@ -128,9 +110,7 @@ pub struct InterruptContext<'a> {
     pub facing_direction: &'a mut FighterFacingDirection,
     pub game_settings: &'a GameSettings,
     pub fighter_attributes: &'a FighterAttributes,
-    pub surface: &'a FighterSurfaceState,
     pub animation: AnimationStatus,
-    pub stage_collision: &'a StageCollision,
 }
 
 impl InterruptContext<'_> {
@@ -151,10 +131,8 @@ pub struct EnterContext<'a> {
     pub stale_move_queue: &'a mut FighterStaleMoveQueue,
     pub facing_direction: &'a mut FighterFacingDirection,
     pub animation_frame: &'a mut FighterAnimationFrame,
-    pub surface: &'a mut FighterSurfaceState,
     pub fighter_attributes: &'a FighterAttributes,
     pub attack_script_assets: &'a FighterAttackScriptAssets,
-    pub game_settings: &'a GameSettings,
 }
 
 impl EnterContext<'_> {
@@ -165,7 +143,6 @@ impl EnterContext<'_> {
 
 pub struct ExitContext<'a> {
     pub hitboxes: &'a mut FighterHitboxes,
-    pub surface: &'a mut FighterSurfaceState,
 }
 
 pub struct UpdateContext<'a> {
@@ -174,7 +151,6 @@ pub struct UpdateContext<'a> {
     pub input: &'a mut FighterInput,
     pub hitboxes: &'a mut FighterHitboxes,
     pub velocity: &'a mut FighterVelocity,
-    pub surface: &'a mut FighterSurfaceState,
     pub knockback_velocity: &'a mut FighterKnockbackVelocity,
     pub game_settings: &'a GameSettings,
     pub animation_frame: u32,
@@ -193,31 +169,22 @@ impl UpdateContext<'_> {
 pub struct CollisionContext<'a> {
     pub translation: &'a mut FighterTranslation,
     pub prev_translation: &'a FighterPreviousTranslation,
-    pub input: &'a FighterInput,
     pub velocity: &'a mut FighterVelocity,
-    pub surface: &'a mut FighterSurfaceState,
+    pub ecb: &'a FighterECB,
-    pub ecb: &'a mut FighterECB,
     pub prev_ecb: &'a FighterPreviousECB,
     pub stage_collision: &'a StageCollision,
-    pub leave_ground_ecb_lock_duration: u32,
-    pub downward_stick_threshold: FGi32,
 }
 
 impl CollisionContext<'_> {
     pub fn air_collide_with_stage(
         &self,
     ) -> Option<crate::fighter::collision::AirCollisionWithStageResult> {
-        let ignored_polys = self.surface.ignored_polygon_ids();
-        let ignore_soft_platforms = self.input.get_last_frame().movement.y
-            <= -self.downward_stick_threshold;
         crate::fighter::collision::air_collide_with_stage(
             self.prev_translation,
             self.translation,
             self.prev_ecb,
             self.ecb,
             self.stage_collision,
-            &ignored_polys,
-            ignore_soft_platforms,
         )
     }
 }
@@ -225,8 +192,6 @@ impl CollisionContext<'_> {
 fighter_states! {
     Wait => wait::WaitState,
     Walk => walk::WalkState,
-    PlatformPass => platform_pass::PlatformPassState,
-    Crouch => crouch::CrouchState,
     Dash => dash::DashState,
     Run => run::RunState,
     Fall => fall::FallState,
@@ -247,10 +212,9 @@ pub struct FighterFrameQuery {
     pub input: &'static mut FighterInput,
     pub hitboxes: &'static mut FighterHitboxes,
     pub velocity: &'static mut FighterVelocity,
-    pub surface: &'static mut FighterSurfaceState,
     pub knockback_velocity: &'static mut FighterKnockbackVelocity,
     pub stale_move_queue: &'static mut FighterStaleMoveQueue,
-    pub ecb: &'static mut FighterECB,
+    pub ecb: &'static FighterECB,
     pub prev_ecb: &'static FighterPreviousECB,
     pub facing_direction: &'static mut FighterFacingDirection,
     pub animation_frame: &'static mut FighterAnimationFrame,
@@ -280,7 +244,6 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         animations: &'a FighterAnimations,
         baked_animations: &'a Assets<BakedFighterAnimations>,
         attributes: &'a FighterAttributes,
-        stage_collision: &'a StageCollision,
     ) -> InterruptContext<'a> {
         let animation = self.animation_status(animations, baked_animations);
         InterruptContext {
@@ -289,8 +252,6 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             game_settings,
             fighter_attributes: attributes,
             animation,
-            surface: &self.surface,
-            stage_collision,
         }
     }
 
@@ -298,7 +259,6 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
         &'a mut self,
         attributes: &'a FighterAttributes,
         attack_script_assets: &'a FighterAttackScriptAssets,
-        game_settings: &'a GameSettings,
     ) -> EnterContext<'a> {
         EnterContext {
             input: &mut self.input,
@@ -308,17 +268,14 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             stale_move_queue: &mut self.stale_move_queue,
             facing_direction: &mut self.facing_direction,
             animation_frame: &mut self.animation_frame,
-            surface: &mut self.surface,
             fighter_attributes: attributes,
             attack_script_assets,
-            game_settings
         }
     }
 
     fn exit_context(&mut self) -> ExitContext<'_> {
         ExitContext {
             hitboxes: &mut self.hitboxes,
-            surface: &mut self.surface,
         }
     }
 
@@ -335,33 +292,27 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             input: &mut self.input,
             hitboxes: &mut self.hitboxes,
             velocity: &mut self.velocity,
-            surface: &mut self.surface,
             knockback_velocity: &mut self.knockback_velocity,
             game_settings,
             animation_frame: self.animation_frame.frame,
             fighter_attributes: attributes,
             attack_scripts,
             attack_script_assets,
-            facing_direction: &self.facing_direction,
+            facing_direction: &self.facing_direction
         }
     }
 
     fn collision_context<'a>(
         &'a mut self,
         stage_collision: &'a StageCollision,
-        game_settings: &'a GameSettings,
     ) -> CollisionContext<'a> {
         CollisionContext {
             translation: &mut self.translation,
             prev_translation: &self.prev_translation,
-            input: &self.input,
             velocity: &mut self.velocity,
-            surface: &mut self.surface,
+            ecb: &self.ecb,
-            ecb: &mut self.ecb,
             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,
         }
     }
 }
@@ -416,19 +367,12 @@ fn transition_state(
     frame: &mut FighterFrameQueryItem,
     attributes: &FighterAttributes,
     attack_script_assets: &FighterAttackScriptAssets,
-    game_settings: &GameSettings,
 ) {
     let old_name = current.name();
     let new_name = next.name();
 
     current.on_exit(&mut frame.exit_context());
-    if let SurfacePolicy::Airborne(lock_policy) = next.surface_policy() {
+    next.on_enter(&mut frame.enter_context(attributes, attack_script_assets));
-        frame.surface.apply_airborne_policy(
-            lock_policy,
-            game_settings.fighter_common.leave_ground_ecb_frame_lock_duration,
-        );
-    }
-    next.on_enter(&mut frame.enter_context(attributes, attack_script_assets, game_settings));
     *current = next;
     info!("{} -> {}", old_name, new_name);
 }
@@ -438,7 +382,6 @@ pub fn state_interrupt_system(
     game_settings: Res<GameSettings>,
     baked_animations: Res<Assets<BakedFighterAnimations>>,
     fighter_manifests: Res<Assets<FighterManifest>>,
-    stage_collision: Res<StageCollision>,
 ) {
     for fighter in &mut query {
         let StatefulFighterQueryItem {
@@ -457,9 +400,7 @@ pub fn state_interrupt_system(
 
         let new_state = if let Some(reaction) = pending_hit_reaction.take() {
             hitstop.remaining_frames = *reaction.hitstop_frames;
-            let shake_frames = reaction
+            let shake_frames = reaction.hitstop_frames.calculate_shake_frames(&game_settings);
-                .hitstop_frames
-                .calculate_shake_frames(&game_settings);
             hitstop_shake.role = FighterHitstopShakeRole::Receiver;
             hitstop_shake.total_frames = shake_frames;
             hitstop_shake.remaining_frames = shake_frames;
@@ -468,26 +409,36 @@ pub fn state_interrupt_system(
             } else {
                 FighterHitstopShakeKind::Vertical
             };
-
+            
-            let mut hitstop_kind = if frame.surface.is_grounded() {
+            let mut hitstop_kind = match &*state {
-                hitstun::HitstopStateKind::Grounded
+                FighterState::Wait(value) => {
-            } else {
+                    hitstun::HitstopStateKind::Grounded(value.grounded_common.clone())
-                hitstun::HitstopStateKind::Airborne
+                }
+                FighterState::Walk(value) => {
+                    hitstun::HitstopStateKind::Grounded(value.grounded_common.clone())
+                }
+                FighterState::Dash(value) => {
+                    hitstun::HitstopStateKind::Grounded(value.ground_common.clone())
+                }
+                FighterState::Run(value) => {
+                    hitstun::HitstopStateKind::Grounded(value.grounded_common.clone())
+                }
+                FighterState::Turn(value) => {
+                    hitstun::HitstopStateKind::Grounded(value.grounded_common.clone())
+                }
+                FighterState::GroundAttack(value) => {
+                    hitstun::HitstopStateKind::Grounded(value.grounded_common.clone())
+                }
+                _ => hitstun::HitstopStateKind::Airborne,
             };
 
-            if let hitstun::HitstopStateKind::Grounded = hitstop_kind {
+            if let hitstun::HitstopStateKind::Grounded(_) = hitstop_kind {
                 let straight_up_angle = FGi32::lit("90.0");
-                if reaction.hitstop_frames
+                if reaction.hitstop_frames >= HitStop::new(game_settings.fighter_common.tumble_bounce_hitstop_threshold) {
-                    >= HitStop::new(game_settings.fighter_common.tumble_bounce_hitstop_threshold)
-                {
                     hitstop_kind = hitstun::HitstopStateKind::Airborne;
                 // TODO: Use floor normal here
-                } else if reaction.launch_angle.abs_diff(straight_up_angle)
+                } else if reaction.launch_angle.abs_diff(straight_up_angle) < game_settings.fighter_common.attack_ground_to_airborne_transition_vertical_angle_threshold {
-                    < game_settings
+                        hitstop_kind = hitstun::HitstopStateKind::Airborne;
-                        .fighter_common
-                        .attack_ground_to_airborne_transition_vertical_angle_threshold
-                {
-                    hitstop_kind = hitstun::HitstopStateKind::Airborne;
                 } else {
                     // straight down is 270
                     let straight_down_angle = FGi32::lit("270.0");
@@ -512,7 +463,6 @@ pub fn state_interrupt_system(
                 animations,
                 &baked_animations,
                 &manifest.attributes,
-                &stage_collision
             ))
         };
 
@@ -523,7 +473,6 @@ pub fn state_interrupt_system(
                 &mut frame,
                 &manifest.attributes,
                 attack_script_assets,
-                &game_settings,
             );
         };
     }
@@ -533,7 +482,6 @@ pub fn state_collision_interrupt_system(
     mut query: Query<StatefulFighterQuery>,
     stage_collision: Res<StageCollision>,
     fighter_manifests: Res<Assets<FighterManifest>>,
-    game_settings: Res<GameSettings>,
 ) {
     for fighter in &mut query {
         let StatefulFighterQueryItem {
@@ -552,7 +500,7 @@ pub fn state_collision_interrupt_system(
             .get(&fighter.manifest)
             .expect("Fighter manifest should be valid");
         let new_state =
-            state.check_collision_interrupt(&mut frame.collision_context(&stage_collision, &game_settings));
+            state.check_collision_interrupt(&mut frame.collision_context(&stage_collision));
         if let Some(new_state) = new_state {
             transition_state(
                 &mut state,
@@ -560,7 +508,6 @@ pub fn state_collision_interrupt_system(
                 &mut frame,
                 &manifest.attributes,
                 &attack_script_assets,
-                &game_settings,
             );
         }
     }

src/fighter/state/platform_pass.rs

@@ -1,61 +0,0 @@
-use super::{CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext};
-use crate::fighter::animation::AnimKind;
-use crate::fighter::state::air::AirborneStateCommon;
-use crate::fighter::state::{ExitContext, FighterState, air, jump};
-
-#[derive(Debug, Clone, Copy, Hash, Default)]
-pub struct PlatformPassState {
-    airborne_state_common: AirborneStateCommon,
-    ignored_polygon: usize,
-}
-
-impl PlatformPassState {
-    pub fn new(airborne_state_common: AirborneStateCommon, ignored_polygon: usize) -> Self {
-        Self {
-            airborne_state_common,
-            ignored_polygon
-        }
-    }
-}
-
-impl FighterStateImpl for PlatformPassState {
-    const NAME: &'static str = "PlatformPass";
-    
-    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        jump::check_input_double_jump(state_context)
-    }
-
-    fn on_enter(&mut self, state_context: &mut EnterContext) {
-        state_context.surface.ignore_polygon(self.ignored_polygon, state_context.game_settings.fighter_common.platform_pass_platform_ignore_duration_frames);
-        state_context.velocity.y = state_context.game_settings.fighter_common.platform_pass_initial_downwards_velocity;
-        state_context.play_animation(AnimKind::PlatformPass, false);
-    }
-
-    fn on_exit(&mut self, state_context: &mut ExitContext) {
-        state_context.surface.clear_polygon_ignore(self.ignored_polygon);
-    }
-
-    fn update(&mut self, state_context: &mut UpdateContext) {
-        air::update_standard_motion(state_context, &mut self.airborne_state_common);
-    }
-
-    fn check_collision_interrupt(
-        &mut self,
-        state_context: &mut CollisionContext,
-    ) -> Option<FighterState> {
-        air::collision_interrupt(
-            state_context,
-            crate::fighter::state::land::LandingType::Normal,
-        )
-    }
-    
-    fn is_visually_grounded<'a>(
-        &'a self,
-    ) -> bool {
-        false
-    }
-
-    fn surface_policy(&self) -> super::SurfacePolicy {
-        super::SurfacePolicy::Airborne(crate::fighter::surface::EcbLockPolicy::StartOnDetach)
-    }
-}

src/fighter/state/run.rs

@@ -6,14 +6,19 @@ use super::{
 };
 use crate::fighter::animation::AnimKind;
 use crate::fighter::state::FighterState;
+use crate::fighter::state::ground::GroundedStateCommon;
 
 #[derive(Component, Debug, Clone, Hash)]
-pub struct RunState;
+pub struct RunState {
+    pub grounded_common: GroundedStateCommon,
+}
 
 impl FighterStateImpl for RunState {
     const NAME: &'static str = "Run";
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if let Some(state) = ground::grounded_movement_common_interrupts(state_context) {
+        if let Some(state) =
+            ground::grounded_movement_common_interrupts(state_context, &self.grounded_common)
+        {
             return Some(state);
         }
 
@@ -23,7 +28,8 @@ impl FighterStateImpl for RunState {
         {
             None
         } else {
-            walk::check_input(state_context).or_else(|| wait::check_input(state_context))
+            walk::check_input(state_context, &self.grounded_common)
+                .or_else(|| wait::check_input(state_context, &self.grounded_common))
         }
     }
 
@@ -56,19 +62,26 @@ impl FighterStateImpl for RunState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, true)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, true)
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
+    state_context: &InterruptContext,
+    ground_state_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();
     if input_frame.movement.x.abs() >= state_context.game_settings.input_common.run_stick_threshold
     {
-        return Some(FighterState::Run(RunState));
+        return Some(FighterState::Run(RunState {
+            grounded_common: ground_state_common.clone(),
+        }));
     }
     None
 }

src/fighter/state/turn.rs

@@ -1,11 +1,13 @@
 use super::{CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext};
 use crate::fighter::animation::AnimKind;
-use crate::fighter::state::ground;
+use crate::fighter::state::ground::{self, GroundedStateCommon};
 use crate::fighter::state::{FighterState, dash, jump, wait, walk};
 use crate::input::FighterCommands;
 
 #[derive(Debug, Clone, Hash)]
-pub struct TurnState;
+pub struct TurnState {
+    pub grounded_common: GroundedStateCommon,
+}
 
 impl FighterStateImpl for TurnState {
     const NAME: &'static str = "Turn";
@@ -17,19 +19,19 @@ impl FighterStateImpl for TurnState {
                 .input_common
                 .turn_into_dashback_window as u32
         {
-            if let Some(state) = dash::check_input(state_context) {
+            if let Some(state) = dash::check_input(state_context, &self.grounded_common) {
                 return Some(state);
             }
         }
-        if let Some(state) = jump::check_input(state_context) {
+        if let Some(state) = jump::check_input(state_context, &self.grounded_common) {
             *state_context.facing_direction = state_context.facing_direction.reverse();
             Some(state)
         } else if state_context.is_current_animation_finished() {
-            if let Some(state) = dash::check_input(state_context) {
+            if let Some(state) = dash::check_input(state_context, &self.grounded_common) {
                 Some(state)
-            } else if let Some(state) = walk::check_input(state_context) {
+            } else if let Some(state) = walk::check_input(state_context, &self.grounded_common) {
                 Some(state)
-            } else if let Some(state) = wait::check_input(state_context) {
+            } else if let Some(state) = wait::check_input(state_context, &self.grounded_common) {
                 Some(state)
             } else {
                 None
@@ -52,15 +54,20 @@ impl FighterStateImpl for TurnState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, false)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, false)
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
+    state_context: &InterruptContext,
+    grounded_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();
 
     let has_smash_input = state_context
@@ -74,7 +81,9 @@ pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
         && input_frame.movement.x.signum() != state_context.facing_direction.to_sign()
         && !has_smash_input
     {
-        return Some(FighterState::Turn(TurnState));
+        return Some(FighterState::Turn(TurnState {
+            grounded_common: grounded_common.clone(),
+        }));
     }
     None
 }

src/fighter/state/wait.rs

@@ -3,18 +3,24 @@ use super::{
 };
 use crate::fighter::animation::AnimKind;
 use crate::fighter::state::FighterState;
+use crate::fighter::state::ground::GroundedStateCommon;
 
 #[derive(Debug, Clone, Hash)]
-pub struct WaitState;
+pub struct WaitState {
+    pub grounded_common: GroundedStateCommon,
+}
 
 impl FighterStateImpl for WaitState {
     const NAME: &'static str = "Wait";
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if let Some(state) = ground::grounded_movement_common_interrupts(state_context) {
+        if let Some(state) =
-            Some(state)
+            ground::grounded_movement_common_interrupts(state_context, &self.grounded_common)
-        } else if let Some(state) =
-            ground::grounded_movement_standstill_common_interrupts(state_context)
         {
+            Some(state)
+        } else if let Some(state) = ground::grounded_movement_standstill_common_interrupts(
+            state_context,
+            &self.grounded_common,
+        ) {
             // Don't transition into yourself
             if let FighterState::Wait(_) = state {
                 None
@@ -38,19 +44,26 @@ impl FighterStateImpl for WaitState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, false)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, false)
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
+    state_context: &InterruptContext,
+    ground_state_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();
 
     if input_frame.movement.x.abs() < state_context.game_settings.input_common.stick_deadzone {
-        return Some(FighterState::Wait(WaitState));
+        return Some(FighterState::Wait(WaitState {
+            grounded_common: ground_state_common.clone(),
+        }));
     }
     None
 }

src/fighter/state/walk.rs

@@ -4,17 +4,23 @@ use super::{
 };
 use crate::fighter::animation::AnimKind;
 use crate::fighter::state::FighterState;
+use crate::fighter::state::ground::GroundedStateCommon;
 
 #[derive(Debug, Clone, Hash)]
-pub struct WalkState;
+pub struct WalkState {
+    pub grounded_common: GroundedStateCommon,
+}
 
 impl FighterStateImpl for WalkState {
     const NAME: &'static str = "Walk";
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
-        if let Some(state) = ground::grounded_movement_common_interrupts(state_context) {
+        if let Some(state) =
+            ground::grounded_movement_common_interrupts(state_context, &self.grounded_common)
+        {
             return Some(state);
         }
-        wait::check_input(state_context).or_else(|| dash::check_input(state_context))
+        wait::check_input(state_context, &self.grounded_common)
+            .or_else(|| dash::check_input(state_context, &self.grounded_common))
     }
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
@@ -48,19 +54,26 @@ impl FighterStateImpl for WalkState {
         &mut self,
         state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
-        ground::collision_interrupt(state_context, false)
+        ground::collision_interrupt(state_context, &mut self.grounded_common, false)
     }
-
+    
-    fn is_visually_grounded<'a>(&'a self) -> bool {
+    fn is_visually_grounded<'a>(
+        &'a self,
+    ) -> bool {
         true
     }
 }
 
-pub fn check_input(state_context: &InterruptContext) -> Option<FighterState> {
+pub fn check_input(
+    state_context: &InterruptContext,
+    ground_state_common: &GroundedStateCommon,
+) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();
 
     if !input_frame.movement.x.is_zero() {
-        return Some(FighterState::Walk(WalkState));
+        return Some(FighterState::Walk(WalkState {
+            grounded_common: ground_state_common.clone(),
+        }));
     }
 
     None

src/fighter/surface.rs

@@ -1,227 +0,0 @@
-use bevy::prelude::*;
-
-use crate::stage::line::StageLineID;
-
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
-pub enum EcbLockPolicy {
-    StartOnDetach,
-    Restart,
-    Preserve,
-    Clear,
-}
-
-/// The stage surface currently supporting a fighter.
-///
-/// This is physics state rather than fighter-state-machine state. Keeping it
-/// separate means grounded, landing, and hitstun states all share one source
-/// of truth for stage contact.
-#[derive(Clone, Debug, Hash, PartialEq, Eq)]
-pub struct IgnoredPolygon {
-    pub polygon: usize,
-    pub frames_remaining: u32,
-}
-
-#[derive(Component, Clone, Debug, Hash, PartialEq, Eq)]
-pub enum FighterSurfaceState {
-    Airborne {
-        ecb_lock_frames_remaining: u32,
-        ignored_polys: Vec<IgnoredPolygon>,
-    },
-    Grounded {
-        line_id: StageLineID,
-    },
-}
-
-impl Default for FighterSurfaceState {
-    fn default() -> Self {
-        Self::Airborne {
-            ecb_lock_frames_remaining: 0,
-            ignored_polys: vec![],
-        }
-    }
-}
-
-impl FighterSurfaceState {
-    pub fn is_grounded(&self) -> bool {
-        matches!(self, Self::Grounded { .. })
-    }
-
-    pub fn line_id(&self) -> Option<StageLineID> {
-        match self {
-            Self::Airborne { .. } => None,
-            Self::Grounded { line_id } => Some(*line_id),
-        }
-    }
-
-    pub(crate) fn land(&mut self, line_id: StageLineID) {
-        *self = Self::Grounded { line_id };
-    }
-
-    pub fn clear_polygon_ignore(&mut self, polygon: usize) {
-        let Self::Airborne { ignored_polys, .. } = self else {
-            return;
-        };
-
-        ignored_polys.retain(|element| element.polygon != polygon);
-    }
-    
-    pub fn ignore_polygon(&mut self, polygon: usize, duration_frames: u32) {
-        let Self::Airborne { ignored_polys, .. } = self else {
-            return;
-        };
-
-        if duration_frames == 0 {
-            return;
-        }
-
-        if let Some(ignored) = ignored_polys.iter_mut().find(|ignored| ignored.polygon == polygon) {
-            ignored.frames_remaining = duration_frames;
-        } else {
-            ignored_polys.push(IgnoredPolygon {
-                polygon,
-                frames_remaining: duration_frames,
-            });
-        }
-    }
-
-    pub fn is_polygon_ignored(&self, polygon: usize) -> bool {
-        matches!(self, Self::Airborne { ignored_polys, .. }
-            if ignored_polys.iter().any(|ignored| ignored.polygon == polygon))
-    }
-
-    pub(crate) fn ignored_polygon_ids(&self) -> Vec<usize> {
-        match self {
-            Self::Airborne { ignored_polys, .. } => {
-                ignored_polys.iter().map(|ignored| ignored.polygon).collect()
-            }
-            Self::Grounded { .. } => vec![],
-        }
-    }
-
-    pub(crate) fn apply_airborne_policy(
-        &mut self,
-        policy: EcbLockPolicy,
-        ecb_lock_duration: u32,
-    ) {
-        let current_lock = match self {
-            Self::Airborne { ecb_lock_frames_remaining, .. } => *ecb_lock_frames_remaining,
-            Self::Grounded { .. } => 0,
-        };
-        let ecb_lock_frames_remaining = match policy {
-            EcbLockPolicy::StartOnDetach if self.is_grounded() => ecb_lock_duration,
-            EcbLockPolicy::StartOnDetach => current_lock,
-            EcbLockPolicy::Restart => ecb_lock_duration,
-            EcbLockPolicy::Preserve => current_lock,
-            EcbLockPolicy::Clear => 0,
-        };
-        let ignored_polys = match self {
-            Self::Airborne { ignored_polys, .. } => ignored_polys.clone(),
-            Self::Grounded { .. } => vec![],
-        };
-        *self = Self::Airborne { ecb_lock_frames_remaining, ignored_polys };
-    }
-
-    pub(crate) fn tick_ecb_lock(&mut self) {
-        if let Self::Airborne { ecb_lock_frames_remaining, .. } = self {
-            *ecb_lock_frames_remaining = ecb_lock_frames_remaining.saturating_sub(1);
-        }
-    }
-
-    pub(crate) fn tick_ignored_polygons(&mut self) {
-        if let Self::Airborne { ignored_polys, .. } = self {
-            for ignored in ignored_polys.iter_mut() {
-                ignored.frames_remaining = ignored.frames_remaining.saturating_sub(1);
-            }
-            ignored_polys.retain(|ignored| ignored.frames_remaining > 0);
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn contact_lifecycle_has_one_source_of_truth() {
-        let mut surface = FighterSurfaceState::default();
-        assert!(!surface.is_grounded());
-        assert_eq!(surface.line_id(), None);
-
-        let line_id = StageLineID {
-            polygon: 2,
-            segment: 3,
-        };
-        surface.land(line_id);
-        assert!(surface.is_grounded());
-        assert_eq!(surface.line_id(), Some(line_id));
-
-        surface.apply_airborne_policy(EcbLockPolicy::Clear, 0);
-        assert!(!surface.is_grounded());
-        assert_eq!(surface.line_id(), None);
-    }
-
-    #[test]
-    fn start_on_detach_does_not_reset_an_existing_lock() {
-        let mut surface = FighterSurfaceState::default();
-        surface.apply_airborne_policy(EcbLockPolicy::Restart, 5);
-        surface.tick_ecb_lock();
-        surface.apply_airborne_policy(EcbLockPolicy::StartOnDetach, 5);
-
-        assert_eq!(
-            surface,
-            FighterSurfaceState::Airborne {
-                ecb_lock_frames_remaining: 4,
-                ignored_polys: vec![],
-            }
-        );
-    }
-
-    #[test]
-    fn restart_retriggers_an_existing_lock() {
-        let mut surface = FighterSurfaceState::default();
-        surface.apply_airborne_policy(EcbLockPolicy::Restart, 5);
-        surface.tick_ecb_lock();
-        surface.apply_airborne_policy(EcbLockPolicy::Restart, 5);
-
-        assert_eq!(
-            surface,
-            FighterSurfaceState::Airborne {
-                ecb_lock_frames_remaining: 5,
-                ignored_polys: vec![],
-            }
-        );
-    }
-
-    #[test]
-    fn ignored_polygon_expires_after_requested_frames() {
-        let mut surface = FighterSurfaceState::default();
-        surface.ignore_polygon(3, 2);
-
-        assert!(surface.is_polygon_ignored(3));
-        surface.tick_ignored_polygons();
-        assert!(surface.is_polygon_ignored(3));
-        surface.tick_ignored_polygons();
-        assert!(!surface.is_polygon_ignored(3));
-    }
-
-    #[test]
-    fn ignoring_polygon_refreshes_existing_entry() {
-        let mut surface = FighterSurfaceState::default();
-        surface.ignore_polygon(3, 2);
-        surface.ignore_polygon(3, 5);
-        surface.tick_ignored_polygons();
-        surface.tick_ignored_polygons();
-        assert!(surface.is_polygon_ignored(3));
-    }
-
-    #[test]
-    fn airborne_policy_preserves_ignored_polygons_and_landing_clears_them() {
-        let mut surface = FighterSurfaceState::default();
-        surface.ignore_polygon(3, 5);
-        surface.apply_airborne_policy(EcbLockPolicy::Restart, 2);
-        assert!(surface.is_polygon_ignored(3));
-
-        surface.land(StageLineID { polygon: 0, segment: 0 });
-        assert!(!surface.is_polygon_ignored(3));
-    }
-}

src/game_settings.rs

@@ -39,9 +39,6 @@ pub struct FighterSettingsCommon {
     
     /// Maximum angle changed caused by directional influence
     pub di_max_angle: FGi32,
-    pub leave_ground_ecb_frame_lock_duration: u32,
-    pub platform_pass_platform_ignore_duration_frames: u32,
-    pub platform_pass_initial_downwards_velocity: FGi32,
 }
 #[derive(Reflect, Serialize, Deserialize, Clone)]
 #[reflect(opaque)]

src/input/buffer.rs

@@ -233,8 +233,6 @@ pub fn postprocess_input(
             input.clear_command(FighterCommands::SmashMoveUp);
             input.clear_command(FighterCommands::SmashMoveDown);
 
-            input.frames_in_y_flick_deadzone = 0xFF;
-
             let command_to_set = if input.current_frame.movement.y > 0.0 {
                 FighterCommands::SmashMoveUp
             } else {

src/match_loading.rs

@@ -336,15 +336,6 @@ pub fn prepare_match(
             );
             return;
         }
-
-        let ecb_bone_indices = baked.bone_names.iter().enumerate().filter_map(|(idx, name)| {
-            if manifest.ecb_bones.contains(name) {
-                Some(idx)
-            } else {
-                None
-            }
-        }).collect::<Vec<_>>();
-
         if let Err(error) = manifest.attributes.validate() {
             fail_match(
                 &mut next_state,
@@ -445,7 +436,6 @@ pub fn prepare_match(
             attack_scripts,
             manifest_handle,
             manifest.model_scale,
-            ecb_bone_indices,
         ));
     }
 
@@ -487,7 +477,7 @@ pub fn prepare_match(
     );
 
     let mut fighter_roster = Vec::with_capacity(config.players.len());
-    for (index, (player, (scene, animations, attack_scripts, manifest_handle, model_scale, ecb_bone_indices))) in
+    for (index, (player, (scene, animations, attack_scripts, manifest_handle, model_scale))) in
         config.players.iter().zip(prepared).enumerate()
     {
         let spawn_x = (index as i32 * 2 + 1 - config.players.len() as i32) * 5;
@@ -500,7 +490,6 @@ pub fn prepare_match(
             animations,
             attack_scripts,
             WorldAssetRoot(scene),
-            ecb_bone_indices
         ));
     }
 

src/math/vec.rs

@@ -2,7 +2,7 @@ use bevy::math::Vec2;
 use bevy::prelude::*;
 use fixed::types::I32F32;
 use serde::{Deserialize, Serialize};
-use std::ops::{Add, AddAssign, Div, Mul, MulAssign, Sub, SubAssign};
+use std::ops::{Add, AddAssign, Div, Mul, MulAssign, Sub};
 
 use super::int::{FGWide, FGi32};
 
@@ -227,15 +227,6 @@ impl AddAssign for FGVec2 {
     }
 }
 
-impl SubAssign for FGVec2 {
-    fn sub_assign(&mut self, rhs: Self) {
-        *self = Self {
-            x: self.x - rhs.x,
-            y: self.y - rhs.y,
-        }
-    }
-}
-
 impl MulAssign for FGVec2 {
     fn mul_assign(&mut self, rhs: Self) {
         *self = Self {

src/schedule.rs

@@ -19,10 +19,10 @@ pub enum GameplaySet {
     StateUpdate,
     /// Integrate velocities into positions.
     Physics,
-    /// Resolve the integrated positions against the stage.
-    Collision,
     /// Solve collision boxes
     Animation,
+    /// Resolve the integrated positions against the stage.
+    Collision,
     /// Resolve attacks
     Attacks,
 }
@@ -40,8 +40,8 @@ impl Plugin for GameplaySchedulePlugin {
                 GameplaySet::Interrupt,
                 GameplaySet::StateUpdate,
                 GameplaySet::Physics,
-                GameplaySet::Animation,
                 GameplaySet::Collision,
+                GameplaySet::Animation,
                 GameplaySet::Attacks,
             )
                 .chain(),

src/stage/line.rs

@@ -26,7 +26,7 @@ pub enum StagePolyType {
     Platform,
 }
 
-#[derive(Reflect, Hash, Debug, Clone, Copy, Default, PartialEq, Eq)]
+#[derive(Reflect, Hash, Debug, Clone, Copy, Default)]
 pub struct StageLineID {
     pub polygon: usize,
     pub segment: usize,
@@ -34,7 +34,7 @@ pub struct StageLineID {
 
 #[derive(Reflect, Clone, Default)]
 pub struct StagePoly {
-    pub poly_type: StagePolyType,
+    poly_type: StagePolyType,
     pub segments: Vec<StagePolyLineSegment>,
 }