Remove UI multi cam setup

Optimize rollback hot paths (#53 )
## Summary Fixes #20. - Reuse fighter animation scratch and output buffers across rollback frames. - Select air-collision hits in one pass without candidate allocations or sorting. - Index contiguous replay input frames directly and binary-search checksums. - Add regression tests for buffer reuse and replay lookup/validation. Reviewed-on: #53 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>
2026-09-20 18:17:37 +02:00 · 2026-09-20 12:41:13 +00:00 · 2026-09-20 13:35:43 +02:00 · 2026-09-20 11:34:45 +00:00 · 2026-09-20 11:13:15 +00:00 · 2026-09-19 21:40:15 +00:00
26 changed files with 787 additions and 251 deletions
@@ -65,6 +65,11 @@ jobs:
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
          "$HOME/.cargo/bin/rustup" toolchain install nightly-2026-09-14 --profile minimal

+      - name: Install Windows build tooling
+        run: |
+          "$HOME/.cargo/bin/rustup" target add x86_64-pc-windows-msvc --toolchain nightly-2026-09-14
+          "$HOME/.cargo/bin/cargo" install cargo-xwin --locked
+
      - name: Cache production Rust dependencies and build artifacts
        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
@@ -76,7 +81,7 @@ jobs:
        run: |
          sudo apt-get update
          sudo apt-get install --no-install-recommends -y \
-            clang \
+            clang-19 \
            libasound2-dev \
            libudev-dev \
            libusb-1.0-0-dev \
@@ -84,9 +89,15 @@ jobs:
            libx11-dev \
            libxkbcommon-dev \
            libxkbcommon-x11-0 \
+            lld-19 \
+            llvm-19 \
            mesa-vulkan-drivers \
            mold \
            pkg-config
+          sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-19 100
+          sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-19 100
+          echo "/usr/lib/llvm-19/bin" >> "$GITHUB_PATH"
+          rm -f "$HOME/.cache/cargo-xwin/clang-cl"

      - name: Preprocess assets
        run: cargo run --locked --bin process-assets --no-default-features --features debug_features -j 4
@@ -94,6 +105,11 @@ jobs:
      - name: Build production binary
        run: cargo build --locked --profile production --no-default-features --features debug_features -j 4

+      - name: Build Windows production binary
+        run: |
+          clang --version
+          cargo xwin build --locked --target x86_64-pc-windows-msvc --profile production --no-default-features --features debug_features -j 4 --bin shinespark
+
      - name: Verify production binary is not Bevy/Rust dynamically linked
        run: |
          ! readelf -d target/production/shinespark | grep -E 'libbevy_dylib|libstd-.*\.so'
@@ -101,10 +117,10 @@ jobs:
      - name: Package Linux Steam depot
        if: github.event_name == 'push' && github.ref == 'refs/heads/master'
        run: |
-          mkdir -p build/linux
-          cp target/production/shinespark build/linux/shinespark
-          cp -R assets build/linux/assets
-          cp -R imported_assets build/linux/imported_assets
+          mkdir -p build/game
+          cp target/production/shinespark build/game/shinespark
+          cp target/x86_64-pc-windows-msvc/production/shinespark.exe build/game/shinespark.exe
+          cp -R imported_assets build/game/imported_assets

      - if: github.event_name == 'push' && github.ref == 'refs/heads/master'
        uses: CyberAndrii/steam-totp@v1
@@ -123,5 +139,5 @@ jobs:
          appId: 3409670
          buildDescription: ${{ github.sha }}
          rootPath: build
-          depot1Path: linux
+          depot1Path: game
          releaseBranch: master
@@ -10,3 +10,7 @@ imported_assets
 *_old.glb
 /replay.json
 *.replay.tmp
+
+# Python debugger formatter tests
+__pycache__/
+*.pyc
@@ -94,12 +94,6 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"

-[[package]]
-name = "adler32"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
-
 [[package]]
 name = "ahash"
 version = "0.8.12"
@@ -3208,16 +3202,6 @@ dependencies = [
 "windows-sys 0.60.2",
 ]

-[[package]]
-name = "filetime"
-version = "0.2.29"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c287a33c7f0a620c38e641e7f60827713987b3c0f26e8ddc9462cc69cf75759"
-dependencies = [
- "cfg-if",
- "libc",
-]
-
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -3434,9 +3418,9 @@ dependencies = [

 [[package]]
 name = "gc-adapter-neo"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "120a5b3858ae854c4674ae41a38173e8ea04b814fb3212fd3bdd1b04d414a9d7"
+checksum = "a8d3e10c6c4b928cb559f641765ebaa40f5f099bf51bc0227af7431859f8bd84"
 dependencies = [
 "binread",
 "modular-bitfield",
@@ -4266,26 +4250,6 @@ version = "0.2.189"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"

-[[package]]
-name = "libflate"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ff4ae71b685bbad2f2f391fe74f6b7659a34871c08b210fdc039e43bee07d18"
-dependencies = [
- "adler32",
- "crc32fast",
- "libflate_lz77",
-]
-
-[[package]]
-name = "libflate_lz77"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a52d3a8bfc85f250440e4424db7d857e241a3aebbbe301f3eb606ab15c39acbf"
-dependencies = [
- "rle-decode-fast",
-]
-
 [[package]]
 name = "libloading"
 version = "0.8.9"
@@ -4326,15 +4290,13 @@ dependencies = [

 [[package]]
 name = "libusb1-sys"
-version = "0.4.4"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be241693102a24766d0b8526c8988771edac2842630d7e730f8e9fbc014f3703"
+checksum = "da050ade7ac4ff1ba5379af847a10a10a8e284181e060105bf8d86960ce9ce0f"
 dependencies = [
 "cc",
 "libc",
- "libflate",
 "pkg-config",
- "tar",
 "vcpkg",
 ]

@@ -5840,12 +5802,6 @@ dependencies = [
 "syn 2.0.119",
 ]

-[[package]]
-name = "rle-decode-fast"
-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3582f63211428f83597b51b2ddb88e2a91a9d52d12831f9d08f5e624e8977422"
-
 [[package]]
 name = "robust"
 version = "1.2.0"
@@ -5916,9 +5872,9 @@ dependencies = [

 [[package]]
 name = "rusb"
-version = "0.6.5"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6f32cd45962594f9f8cd4547b5757132715600e2c8840aa9ccd3d1a9ed6fdc6"
+checksum = "ab9f9ff05b63a786553a4c02943b74b34a988448671001e9a27e2f0565cc05a4"
 dependencies = [
 "libc",
 "libusb1-sys",
@@ -6126,6 +6082,7 @@ dependencies = [
 "bevy_egui",
 "bevy_ggrs",
 "bincode",
+ "blake3",
 "clap",
 "enum_cycling",
 "enum_cycling_derive",
@@ -6495,17 +6452,6 @@ dependencies = [
 "slotmap",
 ]

-[[package]]
-name = "tar"
-version = "0.4.46"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f6221d9a6003c78398e3b239969f352578258df48c8eb051caadae0015bc840"
-dependencies = [
- "filetime",
- "libc",
- "xattr",
-]
-
 [[package]]
 name = "termcolor"
 version = "1.4.1"
@@ -7911,16 +7857,6 @@ version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea6fc2961e4ef194dcbfe56bb845534d0dc8098940c7e5c012a258bfec6701bd"

-[[package]]
-name = "xattr"
-version = "1.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32e45ad4206f6d2479085147f02bc2ef834ac85886624a23575ae137c8aa8156"
-dependencies = [
- "libc",
- "rustix 1.1.4",
-]
-
 [[package]]
 name = "xcursor"
 version = "0.3.11"
@@ -16,6 +16,7 @@ bevy = { version = "0.19", features = ["asset_processor", "basis-universal", "be
 # Loads the scenes you author in the editor (assets/*.bsn) and builds
 # physics colliders from them. An ordinary dependency; remove it if you
 # stop using authored scenes.
+blake3 = { version = "1.8.5", features = [ "pure" ] }
 thiserror = "2"
 avian3d = "0.7"
 arrayvec = "0.7.8"
@@ -33,7 +34,7 @@ strum = "0.28.0"
 strum_macros = "0.28.0"
 bevy_asset_loader = "0.27.0"
 ron_asset_manager = "0.9.0"
-gc-adapter-neo = { version = "1.1.0", features = ["libusb"] }
+gc-adapter-neo = { version = "1.1.1", features = ["libusb"] }
 rhai = "1.26.0"
 enum_cycling = "0.2.1"
 enum_cycling_derive = "0.2.1"
@@ -2,6 +2,15 @@

 Fancy heavily advanced platform fighting game

+## Debugging fixed-point values with lldb
+
+If using CodeLLDB:
+```json
+"preRunCommands": [
+    "command script import ${workspaceFolder}/tools/lldb_fixed.py"
+]
+```
+
 ## Direct P2P Debugging

 ```text
@@ -16,18 +25,9 @@ cargo run -- --debug-match --players 2 --local-port 7001 \

 ## Production Build

-Production builds use the `production` Cargo profile and do not dynamically
-link Bevy or Rust. Development builds retain Bevy dynamic linking for faster
-iteration. Cargo stores the production profile under `target/production`,
-separate from development artifacts under `target/debug`.
-
 ```sh
 cargo run --locked \
  --bin process-assets --no-default-features --features debug_features
 cargo build --locked \
  --profile production --no-default-features --features debug_features
 ```
-
-The asset preprocessing command must be run from the repository root. It
-populates `imported_assets/Default`, which is then consumed by the production
-game without running the asset processor at startup.
@@ -2,7 +2,7 @@ use bevy::{
    app::ScheduleRunnerPlugin,
    asset::{AssetMode, AssetPlugin, processor::AssetProcessor, processor::ProcessorState},
    gltf::GltfPlugin,
-    image::ImagePlugin,
+    image::{CompressedImageFormats, ImageLoader, ImagePlugin},
    prelude::*,
    tasks::block_on,
    text::TextPlugin,
@@ -19,6 +19,7 @@ fn main() -> ExitCode {
            ..default()
        })
        .add_plugins((ImagePlugin::default(), TextPlugin, GltfPlugin::default()))
+        .register_asset_loader(ImageLoader::new(CompressedImageFormats::NONE))
        .add_plugins(AssetProcessingPlugin)
        .add_systems(Update, finish_when_processed);

@@ -4,8 +4,8 @@ mod asset_baking;
 mod runtime;
 mod visual_binding;

-pub use asset_baking::{BakedAnimationAssetProcessingPlugin, BakedAnimationPlugin};
 pub use crate::math::fixed_transform::FixedMat4;
+pub use asset_baking::{BakedAnimationAssetProcessingPlugin, BakedAnimationPlugin};
 pub use runtime::{
    BakedAnimationClip, BakedFighterAnimations, FighterBoneIndexMap, FighterBoneMatrices,
    update_fighter_bone_matrices,
@@ -164,6 +164,20 @@ mod tests {
        );
    }

+    #[test]
+    fn repeated_pose_updates_reuse_scratch_and_output_buffers() {
+        let mut matrices = FighterBoneMatrices::default();
+        let names = ["root".into(), "hand".into()];
+        let parents = [None, Some(0)];
+        let pose = [FixedMat4::IDENTITY, FixedMat4::IDENTITY];
+
+        matrices.set_pose(&names, &parents, &pose, FGi32::ONE);
+        let capacities = matrices.buffer_capacities();
+        matrices.set_pose(&names, &parents, &pose, FGi32::ONE);
+
+        assert_eq!(capacities, matrices.buffer_capacities());
+    }
+
    #[test]
    fn model_scale_affects_gameplay_bones_without_changing_visual_locals() {
        let mut root = FixedMat4::IDENTITY;
@@ -3,7 +3,7 @@ use std::collections::HashMap;
 use bevy::prelude::*;
 use serde::{Deserialize, Serialize};

-use super::{BAKED_ANIMATION_FPS};
+use super::BAKED_ANIMATION_FPS;

 use crate::{
    fighter::{
@@ -12,8 +12,8 @@ use crate::{
        manifest::FighterManifest,
        visual::FighterAnimations,
    },
+    math::fixed_transform::FixedMat4,
    math::int::FGi32,
-    math::fixed_transform::FixedMat4
 };

 #[derive(Clone, Debug, Serialize, Deserialize)]
@@ -70,12 +70,24 @@ pub struct FighterBoneMatrices {
    previous_frame_matrices: Vec<FixedMat4>,
    local_matrices: Vec<FixedMat4>,
    previous_local_matrices: Vec<FixedMat4>,
+    model_matrices: Vec<Option<FixedMat4>>,
 }

 #[derive(Component, Clone, Debug, Default)]
 pub struct FighterBoneIndexMap(pub HashMap<String, usize>);

 impl FighterBoneMatrices {
+    #[cfg(test)]
+    pub(super) fn buffer_capacities(&self) -> [usize; 5] {
+        [
+            self.matrices.capacity(),
+            self.local_matrices.capacity(),
+            self.previous_frame_matrices.capacity(),
+            self.previous_local_matrices.capacity(),
+            self.model_matrices.capacity(),
+        ]
+    }
+
    pub fn get(&self, bone: &str) -> Option<(FixedMat4, FixedMat4)> {
        let index = self.bone_names.iter().position(|name| name == bone)?;
        Some((
@@ -142,13 +154,19 @@ impl FighterBoneMatrices {
            assert_eq!(self.bone_names, bone_names, "baked bone names changed");
            assert_eq!(self.parents, parents, "baked bone parents changed");
        }
+        self.matrices.reserve(local.len());
+        self.previous_frame_matrices.reserve(local.len());
+        self.local_matrices.reserve(local.len());
+        self.previous_local_matrices.reserve(local.len());
+        self.model_matrices.reserve(local.len());
        std::mem::swap(&mut self.matrices, &mut self.previous_frame_matrices);
        std::mem::swap(&mut self.local_matrices, &mut self.previous_local_matrices);
        self.local_matrices.clear();
        self.local_matrices.extend_from_slice(local);
-        let mut model = vec![None; local.len()];
+        self.model_matrices.resize(local.len(), None);
+        self.model_matrices.fill(None);
        for index in 0..local.len() {
-            resolve_model_transform(index, parents, local, &mut model)
+            resolve_model_transform(index, parents, local, &mut self.model_matrices)
                .expect("baked bone hierarchy should be valid");
        }
        let model_scale = FixedMat4 {
@@ -159,10 +177,12 @@ impl FighterBoneMatrices {
                [FGi32::ZERO, FGi32::ZERO, FGi32::ZERO, FGi32::ONE],
            ],
        };
-        self.matrices = model
-            .into_iter()
-            .map(|matrix| model_scale.mul(matrix.expect("baked bone hierarchy should be valid")))
-            .collect();
+        self.matrices.clear();
+        self.matrices.extend(
+            self.model_matrices.iter().map(|matrix| {
+                model_scale.mul(matrix.expect("baked bone hierarchy should be valid"))
+            }),
+        );
    }
 }

@@ -50,11 +50,13 @@ pub fn air_collide_with_stage(
        translation.0 + ecb.get_bottom_point(),
    );

-    let mut intersect_results = vec![];
-
-    for (poly_idx, poly) in stage_collision.stage_polys.iter().enumerate() {
-        if let Some(intersect_result) = poly.intersect_ray(ray_segment) {
-            intersect_results.push((
+    stage_collision
+        .stage_polys
+        .iter()
+        .enumerate()
+        .filter_map(|(poly_idx, poly)| {
+            poly.intersect_ray(ray_segment).map(|intersect_result| {
+                (
                    AirCollisionWithStageResult {
                        line_id: {
                            StageLineID {
@@ -68,13 +70,9 @@ pub fn air_collide_with_stage(
                    intersect_result
                        .position
                        .distance_squared(ray_segment.point2()),
-            ));
-        }
-    }
-    intersect_results.sort_by(|(_, a), (_, b)| a.cmp(b));
-
-    intersect_results
-        .iter()
-        .last()
-        .map(|(val, _)| val.to_owned().clone())
+                )
+            })
+        })
+        .max_by(|(_, a), (_, b)| a.cmp(b))
+        .map(|(result, _)| result)
 }
@@ -32,13 +32,9 @@ use clap::Parser;
 use ron_asset_manager::RonAssetPlugin;

 use crate::{
-    camera::MatchCameraPlugin,
-    fighter::manifest::FighterManifest,
-    game_settings::GameSettings,
-    menus::style::FGUiStyle,
-    schedule::GameplaySchedulePlugin,
-    stage::manifest::StageManifest,
-    ui::InGameUIPlugin,
+    camera::MatchCameraPlugin, fighter::manifest::FighterManifest, game_settings::GameSettings,
+    match_runtime::MatchRuntimePlugin, menus::style::FGUiStyle, schedule::GameplaySchedulePlugin,
+    stage::manifest::StageManifest, ui::InGameUIPlugin,
 };

 mod args;
@@ -48,6 +44,7 @@ pub mod fighter;
 pub mod game_settings;
 pub mod input;
 pub mod match_loading;
+pub mod match_runtime;
 mod math;
 pub mod menus;
 pub mod netcode;
@@ -111,6 +108,7 @@ impl Plugin for GamePlugin {
                // Brings up GGRS (and with it `GgrsSchedule`), so it goes first.
                netcode::FighterNetcodePlugin::default(),
                GameplaySchedulePlugin,
+                MatchRuntimePlugin,
                input::FighterInputPlugin,
                replay::ReplayPlugin,
                debug_tools::DebugToolsPlugin,
@@ -8,28 +8,29 @@ use bevy_ggrs::prelude::Session;
 use serde::{Deserialize, Serialize};

 use crate::{
+    AppState,
    args::Args,
    fighter::{
+        FighterId, FighterRoster,
        animation::AnimKind,
        attack::{AttackKind, FighterAttackScriptAssets},
-        baked_animation::{BakedFighterAnimations, BAKED_ANIMATION_FPS},
+        baked_animation::{BAKED_ANIMATION_FPS, BakedFighterAnimations},
        manifest::{FighterManifest, FighterManifestRegistry},
        spawn_fighter,
        visual::FighterAnimations,
-        FighterId, FighterRoster,
    },
    input::{LocalInputAssignments, LocalInputSource},
+    match_runtime::MatchState,
    math::{int::FGi32, vec::FGVec2},
    netcode::{
-        session::{create_session, ConnectionStatus, SessionConfig},
        GGRSCfg,
+        session::{ConnectionStatus, SessionConfig, create_session},
    },
    scripting::FighterAttackScript,
    stage::{
        self,
        manifest::{StageId, StageManifest, StageManifestRegistry},
    },
-    AppState,
 };

 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
@@ -38,10 +39,49 @@ pub struct MatchPlayer {
    pub fighter: FighterId,
 }

-#[derive(Resource, Debug, Clone, PartialEq, Eq)]
-pub struct PendingMatch {
+#[derive(Resource, Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct MatchConfig {
    pub stage: StageId,
    pub players: Vec<MatchPlayer>,
+    pub rules: MatchRules,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum MatchRules {
+    Stock {
+        starting_stocks: u8,
+        time_limit_frames: Option<u32>,
+    },
+    Timed {
+        time_limit_frames: u32,
+    },
+}
+
+impl Default for MatchRules {
+    fn default() -> Self {
+        Self::Stock {
+            starting_stocks: 3,
+            time_limit_frames: None,
+        }
+    }
+}
+
+impl MatchRules {
+    fn validate(&self) -> Result<(), &'static str> {
+        match self {
+            Self::Stock {
+                starting_stocks: 0, ..
+            } => Err("stock matches must start with at least one stock"),
+            Self::Stock {
+                time_limit_frames: Some(0),
+                ..
+            } => Err("stock match time limits must be greater than zero frames"),
+            Self::Timed {
+                time_limit_frames: 0,
+            } => Err("timed match limits must be greater than zero frames"),
+            _ => Ok(()),
+        }
+    }
 }

 pub struct SelectedFighterAssets {
@@ -59,7 +99,7 @@ pub struct MatchAssets {

 impl MatchAssets {
    fn requested(world: &World) -> Self {
-        let request = world.resource::<PendingMatch>();
+        let config = world.resource::<MatchConfig>();
        let asset_server = world.resource::<AssetServer>();
        let registry = world.resource::<FighterManifestRegistry>();
        let stage_registry = world.resource::<StageManifestRegistry>();
@@ -67,7 +107,7 @@ impl MatchAssets {
        let stage_manifests = world.resource::<Assets<StageManifest>>();

        let stage_handle = stage_registry
-            .get(request.stage)
+            .get(config.stage)
            .expect("Startup validation guarantees every stage has a manifest");
        let stage_manifest = stage_manifests
            .get(&stage_handle)
@@ -75,7 +115,7 @@ impl MatchAssets {

        Self {
            stage: asset_server.load(stage_manifest.model_path.clone()),
-            fighters: request
+            fighters: config
                .players
                .iter()
                .map(|player| {
@@ -141,10 +181,10 @@ pub struct MatchRoot;
 pub fn initiate_match(
    commands: &mut Commands,
    next_state: &mut NextState<AppState>,
-    request: PendingMatch,
+    config: MatchConfig,
 ) {
    commands.remove_resource::<crate::netcode::session::MatchDisconnected>();
-    commands.insert_resource(request);
+    commands.insert_resource(config);
    next_state.set(AppState::LoadingMatch);
 }

@@ -166,12 +206,9 @@ pub fn initiate_default_match(
    if let Some(path) = &args.play_replay {
        match crate::replay::load(path) {
            Ok(replay) => {
-                let request = PendingMatch {
-                    stage: replay.match_config.stage,
-                    players: replay.match_config.players.clone(),
-                };
+                let config = replay.match_config.clone();
                commands.insert_resource(crate::replay::LoadedReplay(replay));
-                initiate_match(&mut commands, &mut next_state, request);
+                initiate_match(&mut commands, &mut next_state, config);
            }
            Err(error) => {
                error!("Replay load failed: {error}");
@@ -215,16 +252,17 @@ pub fn initiate_default_match(
    initiate_match(
        &mut commands,
        &mut next_state,
-        PendingMatch {
+        MatchConfig {
            stage: StageId::TestStage,
            players,
+            rules: MatchRules::default(),
        },
    );
 }

 pub fn prepare_match(
    mut commands: Commands,
-    request: Res<PendingMatch>,
+    config: Res<MatchConfig>,
    assets: Res<MatchAssets>,
    gltfs: Res<Assets<Gltf>>,
    baked_animations: Res<Assets<BakedFighterAnimations>>,
@@ -236,7 +274,7 @@ pub fn prepare_match(
    args: Res<Args>,
    mut next_state: ResMut<NextState<AppState>>,
 ) {
-    if !valid_player_handles(&request.players) {
+    if !valid_player_handles(&config.players) {
        fail_match(
            &mut next_state,
            "player handles must be unique and cover 0..player_count",
@@ -244,7 +282,12 @@ pub fn prepare_match(
        return;
    }

-    if assets.fighters.len() != request.players.len() {
+    if let Err(error) = config.rules.validate() {
+        fail_match(&mut next_state, error);
+        return;
+    }
+
+    if assets.fighters.len() != config.players.len() {
        fail_match(
            &mut next_state,
            "loaded character assets do not match the requested player slots",
@@ -396,7 +439,7 @@ pub fn prepare_match(
        ));
    }

-    let session_config = match SessionConfig::from_args(&args, request.players.len()) {
+    let session_config = match SessionConfig::from_args(&args, config.players.len()) {
        Ok(config) => config,
        Err(error) => {
            fail_match(
@@ -406,7 +449,7 @@ pub fn prepare_match(
            return;
        }
    };
-    let session = match create_session(&args, request.players.len()) {
+    let session = match create_session(&args, config.players.len()) {
        Ok(session) => session,
        Err(error) => {
            fail_match(
@@ -420,7 +463,7 @@ pub fn prepare_match(
    let root = commands.spawn((Name::new("Match"), MatchRoot)).id();

    let stage_handle = stage_registry
-        .get(request.stage)
+        .get(config.stage)
        .expect("Initialization check should ensure all stages exist");
    let stage_manifest = stage_manifests
        .get(&stage_handle)
@@ -433,11 +476,11 @@ pub fn prepare_match(
        stage_manifest.camera.clone(),
    );

-    let mut fighter_roster = Vec::with_capacity(request.players.len());
+    let mut fighter_roster = Vec::with_capacity(config.players.len());
    for (index, (player, (scene, animations, attack_scripts, manifest_handle, model_scale))) in
-        request.players.iter().zip(prepared).enumerate()
+        config.players.iter().zip(prepared).enumerate()
    {
-        let spawn_x = (index as i32 * 2 + 1 - request.players.len() as i32) * 5;
+        let spawn_x = (index as i32 * 2 + 1 - config.players.len() as i32) * 5;
        fighter_roster.push(spawn_fighter(
            &mut commands,
            player.handle,
@@ -451,6 +494,7 @@ pub fn prepare_match(
    }

    commands.insert_resource(FighterRoster(fighter_roster));
+    commands.insert_resource(MatchState::from_config(&config));
    commands.insert_resource(session_config);
    commands.insert_resource(ConnectionStatus::default());
    commands.insert_resource::<Session<GGRSCfg>>(session);
@@ -487,7 +531,8 @@ pub fn cleanup_match(
    commands.remove_resource::<ConnectionStatus>();
    commands.remove_resource::<stage::line::StageCollision>();
    commands.remove_resource::<MatchAssets>();
-    commands.remove_resource::<PendingMatch>();
+    commands.remove_resource::<MatchConfig>();
+    commands.remove_resource::<MatchState>();
    commands.remove_resource::<FighterRoster>();
 }

@@ -496,8 +541,8 @@ mod tests {
    use super::*;

    #[test]
-    fn match_request_keeps_duplicate_fighter_slots() {
-        let request = PendingMatch {
+    fn match_config_keeps_duplicate_fighter_slots() {
+        let config = MatchConfig {
            stage: StageId::TestStage,
            players: vec![
                MatchPlayer {
@@ -509,12 +554,13 @@ mod tests {
                    fighter: FighterId::TestFighter,
                },
            ],
+            rules: MatchRules::default(),
        };

-        assert_eq!(request.players.len(), 2);
-        assert_eq!(request.players[0].handle, 0);
-        assert_eq!(request.players[1].handle, 1);
-        assert!(valid_player_handles(&request.players));
+        assert_eq!(config.players.len(), 2);
+        assert_eq!(config.players[0].handle, 0);
+        assert_eq!(config.players[1].handle, 1);
+        assert!(valid_player_handles(&config.players));
    }

    #[test]
@@ -533,6 +579,53 @@ mod tests {
        assert!(!valid_player_handles(&players));
    }

+    #[test]
+    fn match_rules_reject_zero_limits() {
+        assert!(
+            MatchRules::Stock {
+                starting_stocks: 0,
+                time_limit_frames: None,
+            }
+            .validate()
+            .is_err()
+        );
+        assert!(
+            MatchRules::Stock {
+                starting_stocks: 3,
+                time_limit_frames: Some(0),
+            }
+            .validate()
+            .is_err()
+        );
+        assert!(
+            MatchRules::Timed {
+                time_limit_frames: 0,
+            }
+            .validate()
+            .is_err()
+        );
+    }
+
+    #[test]
+    fn match_rules_accept_valid_modes() {
+        assert!(MatchRules::default().validate().is_ok());
+        assert!(
+            MatchRules::Stock {
+                starting_stocks: 3,
+                time_limit_frames: Some(60),
+            }
+            .validate()
+            .is_ok()
+        );
+        assert!(
+            MatchRules::Timed {
+                time_limit_frames: 60,
+            }
+            .validate()
+            .is_ok()
+        );
+    }
+
    #[test]
    fn match_loading_waits_for_attack_scripts() {
        let mut attack_scripts = HashMap::new();
@@ -0,0 +1,102 @@
+//! Rollback-simulated state for an active match.
+
+use bevy::prelude::*;
+use bevy_ggrs::prelude::*;
+
+use crate::match_loading::{MatchConfig, MatchRules};
+
+#[derive(Resource, Clone, Debug, Hash, PartialEq, Eq)]
+pub struct MatchState {
+    pub elapsed_frames: u32,
+    /// Indexed by the player's session handle.
+    pub players: Vec<PlayerMatchState>,
+}
+
+#[derive(Clone, Debug, Hash, PartialEq, Eq)]
+pub struct PlayerMatchState {
+    pub stocks_remaining: Option<u8>,
+    pub score: i32,
+    pub deaths: u32,
+}
+
+impl MatchState {
+    pub fn from_config(config: &MatchConfig) -> Self {
+        let stocks_remaining = match &config.rules {
+            MatchRules::Stock {
+                starting_stocks, ..
+            } => Some(*starting_stocks),
+            MatchRules::Timed { .. } => None,
+        };
+
+        Self {
+            elapsed_frames: 0,
+            players: (0..config.players.len())
+                .map(|_| PlayerMatchState {
+                    stocks_remaining,
+                    score: 0,
+                    deaths: 0,
+                })
+                .collect(),
+        }
+    }
+}
+
+pub struct MatchRuntimePlugin;
+
+impl Plugin for MatchRuntimePlugin {
+    fn build(&self, app: &mut App) {
+        app.rollback_resource_with_clone::<MatchState>()
+            .checksum_resource_with_hash::<MatchState>();
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{fighter::FighterId, match_loading::MatchPlayer, stage::manifest::StageId};
+
+    fn config(rules: MatchRules) -> MatchConfig {
+        MatchConfig {
+            stage: StageId::TestStage,
+            players: vec![
+                MatchPlayer {
+                    handle: 1,
+                    fighter: FighterId::TestFighter,
+                },
+                MatchPlayer {
+                    handle: 0,
+                    fighter: FighterId::TestFighter,
+                },
+            ],
+            rules,
+        }
+    }
+
+    #[test]
+    fn stock_state_starts_with_configured_stocks() {
+        let state = MatchState::from_config(&config(MatchRules::Stock {
+            starting_stocks: 4,
+            time_limit_frames: Some(60),
+        }));
+
+        assert_eq!(state.elapsed_frames, 0);
+        assert_eq!(state.players.len(), 2);
+        assert!(state.players.iter().all(|player| {
+            player.stocks_remaining == Some(4) && player.score == 0 && player.deaths == 0
+        }));
+    }
+
+    #[test]
+    fn timed_state_has_no_stock_counter() {
+        let state = MatchState::from_config(&config(MatchRules::Timed {
+            time_limit_frames: 60,
+        }));
+
+        assert!(
+            state
+                .players
+                .iter()
+                .all(|player| player.stocks_remaining.is_none())
+        );
+    }
+}
@@ -241,7 +241,7 @@ pub fn copy_cursor_transform_to_token(
    character_boxes: Query<(&CharacterBox, &ComputedNode, &UiGlobalTransform)>,
    match_config: Res<MenuMatchConfig>,
    cursors: Query<&UiGlobalTransform, With<FGMenuCursor>>,
-    cam: Single<&Camera, With<IsDefaultUiCamera>>,
+    cam: Single<&Camera>,
    ui_scale: Res<UiScale>,
 ) -> Result {
    let camera = cam.into_inner();
@@ -181,7 +181,7 @@ pub fn cursor_input(
 }

 pub fn update_cursor_transform(
-    camera: Single<&Camera, With<IsDefaultUiCamera>>,
+    camera: Single<&Camera>,
    query: Query<(&mut Node, &PointerLocation), With<FGMenuCursor>>,
    ui_scale: Res<UiScale>,
 ) {
@@ -3,7 +3,7 @@ use thiserror::Error;

 use crate::{
    fighter::FighterId,
-    match_loading::{MatchPlayer, PendingMatch},
+    match_loading::{MatchConfig, MatchPlayer, MatchRules},
    stage::manifest::StageId,
 };

@@ -60,7 +60,7 @@ impl MenuMatchConfig {
        !has_unselected_fighter
    }

-    pub fn to_pending_match(&self) -> Result<PendingMatch, MenuMatchConfigErrors> {
+    pub fn to_match_config(&self) -> Result<MatchConfig, MenuMatchConfigErrors> {
        let mut match_players = vec![];

        let stage = self.stage.ok_or(MenuMatchConfigErrors::StageNotSelected)?;
@@ -78,9 +78,28 @@ impl MenuMatchConfig {
            });
        }

-        Ok(PendingMatch {
+        Ok(MatchConfig {
            players: match_players,
            stage,
+            rules: MatchRules::default(),
        })
    }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn menu_config_uses_default_match_rules() {
+        let menu = MenuMatchConfig {
+            stage: Some(StageId::TestStage),
+            players: vec![MenuMatchPlayerSlot {
+                slot: 0,
+                fighter: Some(FighterId::TestFighter),
+            }],
+        };
+
+        assert_eq!(menu.to_match_config().unwrap().rules, MatchRules::default());
+    }
+}
@@ -25,6 +25,8 @@ pub mod style;

 #[derive(Component, Clone, Default)]
 pub struct MenuMarker {}
+#[derive(Component, Clone, Default)]
+pub struct MenuCameraMarker {}

 pub struct MenuPlugin;

@@ -38,6 +40,7 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
    bsn! {
        #MenuRoot
        MenuMarker
+        Transform
        Node {
            width: percent(100),
            height: percent(100),
@@ -46,6 +49,11 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
            flex_direction: FlexDirection::Column,
        }
        Children [
+            (
+                #MenuCamera
+                Camera
+                Camera2d
+            ),
            (
                #MenuContainer
                Node {
@@ -65,15 +73,18 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {

 pub fn despawn_menu(
    existing_menu: Option<Single<Entity, With<MenuMarker>>>,
+    existing_menu_camera: Option<Single<Entity, With<MenuCameraMarker>>>,
    mut commands: Commands,
 ) {
    if let Some(entity) = existing_menu {
        commands
            .entity(entity.into_inner())
-            .remove::<Camera2d>()
-            .remove::<Camera>()
            .despawn();
    }
+
+    if let Some(menu_cam) = existing_menu_camera {
+        commands.entity(*menu_cam).despawn();
+    }
 }

 pub fn spawn_menu(
@@ -84,8 +95,6 @@ pub fn spawn_menu(
    if let Some(entity) = existing_menu {
        commands
            .entity(entity.into_inner())
-            .remove::<Camera2d>()
-            .remove::<Camera>()
            .despawn();
    }
    commands.queue_spawn_scene(wrap_menu(menu));
@@ -114,14 +123,6 @@ impl Plugin for MenuPlugin {
        app.add_systems(
            OnEnter(AppState::MainMenu),
            (build_menu::<MainMenu>, |mut commands: Commands| {
-                commands.spawn((Camera2d, IsDefaultUiCamera));
-                commands.spawn((
-                    Camera2d,
-                    Camera {
-                        order: 1,
-                        ..default()
-                    },
-                ));
            }),
        )
        .add_message::<character_select::PlayerSlotAssigned>()
@@ -77,7 +77,7 @@ pub fn stage_selected(
        initiate_match(
            &mut commands,
            &mut next_state,
-            match_config.to_pending_match()?,
+            match_config.to_match_config()?,
        );
    }
    Ok(())
@@ -12,16 +12,12 @@ use clap::ValueEnum;
 use serde::{Deserialize, Serialize};

 use crate::{
-    AppState,
-    args::Args,
-    input::FighterInputFrame,
-    match_loading::{MatchPlayer, PendingMatch},
-    netcode::GGRSCfg,
+    AppState, args::Args, input::FighterInputFrame, match_loading::MatchConfig, netcode::GGRSCfg,
    schedule::GameplaySet,
 };

 const MAGIC: &[u8; 8] = b"SPRPLY01";
-pub const REPLAY_VERSION: u32 = 1;
+pub const REPLAY_VERSION: u32 = 2;

 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq, ValueEnum)]
 pub enum ReplayFormat {
@@ -34,17 +30,11 @@ pub enum ReplayFormat {
 pub struct Replay {
    pub replay_version: u32,
    pub game_version: String,
-    pub match_config: ReplayMatch,
+    pub match_config: MatchConfig,
    pub frames: Vec<ReplayFrame>,
    pub checksums: Vec<ReplayChecksum>,
 }

-#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
-pub struct ReplayMatch {
-    pub stage: crate::stage::manifest::StageId,
-    pub players: Vec<MatchPlayer>,
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
 pub struct ReplayFrame {
    pub frame: i32,
@@ -162,6 +152,20 @@ fn validate(replay: &Replay) -> Result<(), String> {
    {
        return Err("replay frames must be strictly ordered".into());
    }
+    if replay
+        .frames
+        .windows(2)
+        .any(|frames| frames[0].frame.checked_add(1) != Some(frames[1].frame))
+    {
+        return Err("replay frames must be contiguous".into());
+    }
+    if replay
+        .checksums
+        .windows(2)
+        .any(|checksums| checksums[0].frame >= checksums[1].frame)
+    {
+        return Err("replay checksums must be strictly ordered".into());
+    }
    if replay
        .frames
        .iter()
@@ -183,6 +187,21 @@ impl Replay {
        handles.sort_unstable();
        handles != (0..handles.len()).collect::<Vec<_>>()
    }
+
+    fn frame(&self, frame: i32) -> Option<&ReplayFrame> {
+        let first_frame = self.frames.first()?.frame;
+        let index = frame.checked_sub(first_frame)? as usize;
+        self.frames
+            .get(index)
+            .filter(|recorded| recorded.frame == frame)
+    }
+
+    fn checksum(&self, frame: i32) -> Option<u128> {
+        self.checksums
+            .binary_search_by_key(&frame, |checksum| checksum.frame)
+            .ok()
+            .map(|index| self.checksums[index].checksum)
+    }
 }

 fn start_replay(mut commands: Commands, args: Res<Args>, loaded: Option<Res<LoadedReplay>>) {
@@ -220,11 +239,7 @@ fn replay_inputs(
                .insert(frame.0, inputs.iter().map(|(input, _)| *input).collect());
        }
        ReplayMode::Playback { replay, mismatch } if !*mismatch => {
-            let Some(recorded) = replay
-                .frames
-                .iter()
-                .find(|recorded| recorded.frame == frame.0)
-            else {
+            let Some(recorded) = replay.frame(frame.0) else {
                error!("Replay has no input for frame {}", frame.0);
                *mismatch = true;
                return;
@@ -245,14 +260,10 @@ fn record_checksum(
    let Some(mut runtime) = runtime else { return };
    if matches!(&runtime.mode, ReplayMode::Record { .. }) {
        runtime.checksums.insert(frame.0, checksum.0);
-    } else if let ReplayMode::Playback { replay, mismatch } = &mut runtime.mode {
-        if let Some(expected) = replay
-            .checksums
-            .iter()
-            .find(|value| value.frame == frame.0)
-            .map(|value| value.checksum)
+    } else if let ReplayMode::Playback { replay, mismatch } = &mut runtime.mode
+        && let Some(expected) = replay.checksum(frame.0)
+        && expected != checksum.0
    {
-            if expected != checksum.0 {
        error!(
            "Replay desync at frame {}: expected {:X}, got {:X}",
            frame.0, expected, checksum.0
@@ -260,34 +271,32 @@ fn record_checksum(
        *mismatch = true;
    }
 }
-    }
-}

 fn stop_recording(
    mut commands: Commands,
    stop_request: Option<Res<StopReplayRecording>>,
    runtime: Option<ResMut<ReplayRuntime>>,
-    request: Option<Res<PendingMatch>>,
+    config: Option<Res<MatchConfig>>,
 ) {
    if stop_request.is_none() {
        return;
    }
    commands.remove_resource::<StopReplayRecording>();
-    finish_recording_inner(&mut commands, runtime, request);
+    finish_recording_inner(&mut commands, runtime, config);
 }

 fn finish_recording(
    mut commands: Commands,
    runtime: Option<ResMut<ReplayRuntime>>,
-    request: Option<Res<PendingMatch>>,
+    config: Option<Res<MatchConfig>>,
 ) {
-    finish_recording_inner(&mut commands, runtime, request);
+    finish_recording_inner(&mut commands, runtime, config);
 }

 fn finish_recording_inner(
    commands: &mut Commands,
    runtime: Option<ResMut<ReplayRuntime>>,
-    request: Option<Res<PendingMatch>>,
+    config: Option<Res<MatchConfig>>,
 ) {
    let Some(mut runtime) = runtime else { return };
    let ReplayMode::Record { path, format } = &runtime.mode else {
@@ -296,16 +305,13 @@ fn finish_recording_inner(
    if runtime.finished || runtime.frames.is_empty() {
        return;
    }
-    let Some(request) = request else { return };
+    let Some(config) = config else { return };
    let path = path.clone();
    let format = *format;
    let replay = Replay {
        replay_version: REPLAY_VERSION,
        game_version: env!("CARGO_PKG_VERSION").into(),
-        match_config: ReplayMatch {
-            stage: request.stage,
-            players: request.players.clone(),
-        },
+        match_config: config.as_ref().clone(),
        frames: runtime
            .frames
            .iter()
@@ -355,7 +361,7 @@ mod tests {
    use super::*;
    use crate::{
        fighter::FighterId,
-        match_loading::MatchPlayer,
+        match_loading::{MatchPlayer, MatchRules},
        math::{int::FGi32, vec::FGVec2},
        stage::manifest::StageId,
    };
@@ -364,12 +370,15 @@ mod tests {
        Replay {
            replay_version: REPLAY_VERSION,
            game_version: "test".into(),
-            match_config: ReplayMatch {
+            match_config: MatchConfig {
                stage: StageId::TestStage,
                players: vec![MatchPlayer {
                    handle: 0,
                    fighter: FighterId::TestFighter,
                }],
+                rules: MatchRules::Timed {
+                    time_limit_frames: 21_600,
+                },
            },
            frames: vec![ReplayFrame {
                frame: 1,
@@ -406,4 +415,52 @@ mod tests {
        replay.frames[0].inputs.clear();
        assert!(validate(&replay).is_err());
    }
+
+    #[test]
+    fn unsupported_replay_version_is_rejected() {
+        let mut replay = sample();
+        replay.replay_version = 1;
+
+        assert_eq!(
+            validate(&replay).unwrap_err(),
+            "unsupported replay version 1"
+        );
+    }
+
+    #[test]
+    fn playback_lookups_use_frame_offsets_and_support_sparse_checksums() {
+        let mut replay = sample();
+        replay.frames[0].frame = 10;
+        replay.frames.push(ReplayFrame {
+            frame: 11,
+            inputs: replay.frames[0].inputs.clone(),
+        });
+        replay.checksums.push(ReplayChecksum {
+            frame: 11,
+            checksum: 84,
+        });
+        replay.checksums[0].frame = 10;
+        validate(&replay).unwrap();
+
+        assert_eq!(replay.frame(10).unwrap().frame, 10);
+        assert_eq!(replay.frame(11).unwrap().frame, 11);
+        assert!(replay.frame(9).is_none());
+        assert_eq!(replay.checksum(10), Some(42));
+        assert_eq!(replay.checksum(11), Some(84));
+        assert_eq!(replay.checksum(12), None);
+    }
+
+    #[test]
+    fn noncontiguous_input_frames_are_rejected() {
+        let mut replay = sample();
+        replay.frames.push(ReplayFrame {
+            frame: 3,
+            inputs: replay.frames[0].inputs.clone(),
+        });
+
+        assert_eq!(
+            validate(&replay).unwrap_err(),
+            "replay frames must be contiguous"
+        );
+    }
 }
@@ -7,14 +7,10 @@ use strum::IntoEnumIterator;
 use strum_macros::EnumIter;

 use crate::{
-    AppState,
-    game_settings::GameSettings,
-    math::vec::FGVec2,
-    stage::{
+    AppState, game_settings::GameSettings, math::{int::FGi32, vec::FGVec2}, stage::{
        StagePoly,
        line::{StageCollision, StagePolyLineSegmentType, StagePolyType},
-    },
-    texture_reference::TextureReference,
+    }, texture_reference::TextureReference,
 };
 use bevy::prelude::*;

@@ -87,6 +83,14 @@ pub struct StageManifest {
    pub icon: TextureReference,
    pub camera: StageCameraProfile,
    pub polygons: Vec<StagePolyDefinition>,
+    #[reflect(ignore)]
+    pub blast_zone_left: FGi32,
+    #[reflect(ignore)]
+    pub blast_zone_right: FGi32,
+    #[reflect(ignore)]
+    pub blast_zone_top: FGi32,
+    #[reflect(ignore)]
+    pub blast_zone_bottom: FGi32,
 }

 #[derive(Resource)]
@@ -1,20 +1,29 @@
 use bevy::prelude::*;

 use crate::{
-    fighter::manifest::{FighterManifest, FighterManifestRegistry}, match_loading::{PendingMatch}, ui::{errors::UIErrors, fighter_info::FighterInfoUI},
+    fighter::manifest::{FighterManifest, FighterManifestRegistry},
+    match_loading::MatchConfig,
+    ui::{errors::UIErrors, fighter_info::FighterInfoUI},
 };

 #[derive(Component, FromTemplate)]
-pub struct BattleUI {
-}
-
-pub fn spawn_battle_ui(mut commands: Commands, request: Res<PendingMatch>, fighter_registry: Res<FighterManifestRegistry>, manifests: Res<Assets<FighterManifest>>) -> Result {
+pub struct BattleUI {}

+pub fn spawn_battle_ui(
+    mut commands: Commands,
+    config: Res<MatchConfig>,
+    fighter_registry: Res<FighterManifestRegistry>,
+    manifests: Res<Assets<FighterManifest>>,
+) -> Result {
    let mut fighter_uis = vec![];

-    for player in &request.players {
-        let manifest = fighter_registry.get(player.fighter).ok_or_else(|| UIErrors::FighterManifestHandleNotFound(player.fighter))?;
-        let manifest = manifests.get(manifest).ok_or_else(|| UIErrors::FighterManifestNotFound(player.fighter))?;
+    for player in &config.players {
+        let manifest = fighter_registry
+            .get(player.fighter)
+            .ok_or_else(|| UIErrors::FighterManifestHandleNotFound(player.fighter))?;
+        let manifest = manifests
+            .get(manifest)
+            .ok_or_else(|| UIErrors::FighterManifestNotFound(player.fighter))?;

        fighter_uis.push(FighterInfoUI::build(manifest, player));
    }
@@ -1,13 +1,17 @@
 use bevy::prelude::*;

-use crate::{fighter::{attack::FighterDamage, manifest::{FighterManifest}}, match_loading::MatchPlayer, player::Player};
+use crate::{
+    fighter::{attack::FighterDamage, manifest::FighterManifest}, match_loading::{MatchPlayer}, match_runtime::MatchState, player::Player, ui::stock_icon::BattleUIStockIcon,
+};

 #[derive(Component, FromTemplate)]
 pub struct FighterInfoUI {
    percentage_text: Entity,
+    stock_icon_container: Entity,
    _name_text: Entity,
    player_handle: usize,
    visible_damage: FighterDamage,
+    visible_stocks: u8,
 }

 impl FighterInfoUI {
@@ -16,6 +20,7 @@ impl FighterInfoUI {
        bsn! {
            FighterInfoUI {
                percentage_text: #PercentageText,
+                stock_icon_container: #StockIconContainer,
                _name_text: #NameText,
                player_handle: {match_player.handle}
            }
@@ -25,6 +30,10 @@ impl FighterInfoUI {
                justify_content: JustifyContent::Center,
            }
            Children [
+                (
+                    #StockIconContainer
+                    Node
+                )
                (
                    #PercentageText
                    Text("0.00%")
@@ -41,17 +50,54 @@ impl FighterInfoUI {
    }
 }

-pub fn update_fighter_info_damage(fighters: Query<(&Player, &FighterDamage)>, ui_elements: Query<&mut FighterInfoUI>, mut commands: Commands) {
+pub fn update_fighter_info_damage(
+    fighters: Query<(&Player, &FighterDamage)>,
+    ui_elements: Query<&mut FighterInfoUI>,
+    mut commands: Commands,
+) {
    for mut ui_element in ui_elements {
-        let Some((_, damage)) = fighters.iter().find(|(player, _)| {
-            player.handle == ui_element.player_handle
-        }) else {
+        let Some((_, damage)) = fighters
+            .iter()
+            .find(|(player, _)| player.handle == ui_element.player_handle)
+        else {
            continue;
        };

        if *damage != ui_element.visible_damage {
-            commands.entity(ui_element.percentage_text).insert(Text(format!("{}%", damage)));
+            commands
+                .entity(ui_element.percentage_text)
+                .insert(Text(format!("{}%", damage)));
            ui_element.visible_damage = damage.clone();
        }
    }
 }
+
+pub fn update_fighter_info_stocks(
+    match_state: Res<MatchState>,
+    ui_elements: Query<&mut FighterInfoUI>,
+    mut commands: Commands,
+) {
+
+    for mut ui_element in ui_elements {
+        let handle = ui_element.player_handle;
+        let Some(match_player) = match_state.players.get(handle) else {
+            continue;
+        };
+
+        let Some(stocks) = match_player.stocks_remaining else {
+            continue;
+        };
+
+        if stocks != ui_element.visible_stocks {
+            commands
+                .entity(ui_element.stock_icon_container)
+                .despawn_children()
+                .with_children(|spawner| {
+                    for _ in 0..stocks {
+                        spawner.spawn_empty().apply_scene(BattleUIStockIcon::scene());
+                    }
+                });
+            ui_element.visible_stocks = stocks;
+        }
+    }
+}
@@ -1,10 +1,15 @@
 use bevy::prelude::*;

-use crate::AppState;
+use crate::{
+    AppState,
+    match_loading::{MatchConfig, MatchRules},
+    match_runtime::MatchState,
+};

 pub mod battle_ui;
 pub mod errors;
 pub mod fighter_info;
+pub mod stock_icon;

 #[derive(Default)]
 pub struct InGameUIPlugin;
@@ -13,6 +18,20 @@ impl Plugin for InGameUIPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(OnEnter(AppState::InMatch), battle_ui::spawn_battle_ui)
            .add_systems(OnExit(AppState::InMatch), battle_ui::cleanup_battle_ui)
-            .add_systems(PostUpdate, fighter_info::update_fighter_info_damage);
+            .add_systems(PostUpdate, fighter_info::update_fighter_info_damage)
+            .add_systems(
+                PostUpdate,
+                fighter_info::update_fighter_info_stocks.run_if(
+                    resource_exists::<MatchState>
+                        .and_then(resource_exists::<MatchConfig>)
+                        .and_then(|match_config: Res<MatchConfig>| {
+                            if let MatchRules::Stock { .. } = match_config.rules {
+                                true
+                            } else {
+                                false
+                            }
+                        }),
+                ),
+            );
    }
 }
@@ -0,0 +1,17 @@
+use bevy::prelude::*;
+
+#[derive(SceneComponent, Clone, FromTemplate)]
+pub struct BattleUIStockIcon;
+
+impl BattleUIStockIcon {
+    pub fn scene() -> impl Scene {
+        bsn! {
+            Node {
+                width: px(32),
+                height: px(32),
+                border_radius: BorderRadius::MAX,
+            }
+            BackgroundColor({bevy::color::palettes::css::RED})
+        }
+    }
+}
@@ -0,0 +1,123 @@
+"""LLDB summaries for Rust's `fixed` crate.
+
+Load this file from LLDB with:
+
+    command script import /path/to/shinespark/tools/lldb_fixed.py
+
+The implementation does not use floating-point arithmetic, so displayed values
+are exact even for FixedI128/FixedU128 values.
+"""
+
+import re
+
+try:
+    import lldb
+except ImportError:
+    # Keep the pure parsing and formatting helpers testable without LLDB.
+    lldb = None
+
+
+_FIXED_TYPE_RE = re.compile(r"(?:^|::)Fixed([IU])(8|16|32|64|128)<(.+)>$")
+_DIRECT_TYPENUM_RE = re.compile(r"(?:^|::)U(\d+)$")
+_TYPENUM_BIT_RE = re.compile(r"(?:^|::)B([01])(?=\s*[,>])")
+
+
+def parse_fixed_type(type_name):
+    """Return (signed, storage_bits, fractional_bits), or None."""
+    if not type_name:
+        return None
+
+    match = _FIXED_TYPE_RE.search(type_name.replace(" ", ""))
+    if match is None:
+        return None
+
+    signed = match.group(1) == "I"
+    storage_bits = int(match.group(2))
+    fractional_type = match.group(3)
+
+    direct = _DIRECT_TYPENUM_RE.search(fractional_type)
+    if direct is not None:
+        fractional_bits = int(direct.group(1))
+    else:
+        # typenum represents UInt<N, B> as a binary tree. Its textual Rust
+        # type lists the bits from most significant to least significant.
+        digits = _TYPENUM_BIT_RE.findall(fractional_type)
+        if not digits:
+            return None
+        fractional_bits = int("".join(digits), 2)
+
+    if fractional_bits > storage_bits:
+        return None
+    return signed, storage_bits, fractional_bits
+
+
+def normalize_bits(raw_bits, signed, storage_bits):
+    """Interpret a possibly unsigned LLDB integer using the fixed type's width."""
+    mask = (1 << storage_bits) - 1
+    raw_bits &= mask
+    if signed and raw_bits >= 1 << (storage_bits - 1):
+        raw_bits -= 1 << storage_bits
+    return raw_bits
+
+
+def format_fixed(raw_bits, fractional_bits):
+    """Format a scaled integer exactly as a decimal string."""
+    if fractional_bits == 0:
+        return str(raw_bits)
+
+    negative = raw_bits < 0
+    magnitude = -raw_bits if negative else raw_bits
+    whole = magnitude >> fractional_bits
+    remainder = magnitude & ((1 << fractional_bits) - 1)
+
+    if remainder == 0:
+        result = str(whole)
+    else:
+        # remainder / 2^n == (remainder * 5^n) / 10^n, which gives a finite,
+        # exact decimal representation without converting through a float.
+        decimal = str(remainder * 5**fractional_bits).zfill(fractional_bits)
+        result = f"{whole}.{decimal.rstrip('0')}"
+
+    return f"-{result}" if negative else result
+
+
+def _parse_lldb_integer(value):
+    text = value.GetValue()
+    if text is not None:
+        try:
+            return int(text, 0)
+        except ValueError:
+            pass
+
+    # GetValueAsUnsigned is also useful on LLDB versions that do not render
+    # primitive values through GetValue. It is sufficient for all <= 64-bit
+    # fixed types; current LLDB versions render i128/u128 through GetValue.
+    return value.GetValueAsUnsigned()
+
+
+def fixed_summary(value, _internal_dict):
+    layout = parse_fixed_type(value.GetTypeName())
+    if layout is None:
+        return None
+
+    signed, storage_bits, fractional_bits = layout
+    bits = value.GetChildMemberWithName("bits")
+    if not bits.IsValid():
+        return None
+
+    raw_bits = _parse_lldb_integer(bits)
+    raw_bits = normalize_bits(raw_bits, signed, storage_bits)
+    return format_fixed(raw_bits, fractional_bits)
+
+
+def __lldb_init_module(debugger, _internal_dict):
+    # LLDB's type-name regex sees the concrete fixed type rather than project
+    # aliases such as FGi32 and FGWide.
+    debugger.HandleCommand(
+        "type summary add --python-function lldb_fixed.fixed_summary "
+        "--category Shinespark --regex "
+        "'^fixed::Fixed(I|U)(8|16|32|64|128)<.+>$'"
+    )
+    # A dedicated category makes the formatter work even when CodeLLDB has not
+    # enabled rustc's standard `Rust` formatter category yet.
+    debugger.HandleCommand("type category enable Shinespark")
@@ -0,0 +1,58 @@
+import unittest
+
+import lldb_fixed
+
+
+class ParseFixedTypeTests(unittest.TestCase):
+    def test_direct_typenum_alias(self):
+        self.assertEqual(
+            lldb_fixed.parse_fixed_type("fixed::FixedI32<typenum::uint::U16>"),
+            (True, 32, 16),
+        )
+
+    def test_expanded_typenum(self):
+        type_name = (
+            "fixed::FixedI32<"
+            "typenum::uint::UInt<"
+            "typenum::uint::UInt<"
+            "typenum::uint::UInt<"
+            "typenum::uint::UInt<"
+            "typenum::uint::UInt<typenum::uint::UTerm, typenum::bit::B1>, "
+            "typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, "
+            "typenum::bit::B0>>"
+        )
+        self.assertEqual(lldb_fixed.parse_fixed_type(type_name), (True, 32, 16))
+
+    def test_unsigned_type(self):
+        self.assertEqual(
+            lldb_fixed.parse_fixed_type("fixed::FixedU64<typenum::uint::U24>"),
+            (False, 64, 24),
+        )
+
+    def test_unrelated_type(self):
+        self.assertIsNone(lldb_fixed.parse_fixed_type("core::primitive::i32"))
+
+
+class FormatFixedTests(unittest.TestCase):
+    def test_q16_16(self):
+        self.assertEqual(lldb_fixed.format_fixed(3 << 15, 16), "1.5")
+        self.assertEqual(lldb_fixed.format_fixed(-(3 << 15), 16), "-1.5")
+        self.assertEqual(lldb_fixed.format_fixed(1, 16), "0.0000152587890625")
+
+    def test_integer_value_has_no_decimal_suffix(self):
+        self.assertEqual(lldb_fixed.format_fixed(12 << 16, 16), "12")
+
+    def test_q96_32(self):
+        raw = (1 << 100) + (1 << 31)
+        self.assertEqual(
+            lldb_fixed.format_fixed(raw, 32),
+            "295147905179352825856.5",
+        )
+
+    def test_twos_complement_normalization(self):
+        self.assertEqual(lldb_fixed.normalize_bits(0xFFFF8000, True, 32), -32768)
+        self.assertEqual(lldb_fixed.normalize_bits(0xFFFF8000, False, 32), 0xFFFF8000)
+
+
+if __name__ == "__main__":
+    unittest.main()
Author	SHA1	Message	Date
EIREXE	d342c9282c	Remove UI multi cam setup CI / build-and-test (pull_request) Failing after 56s Details CI / production-build (pull_request) Failing after 1m34s Details	2026-09-20 18:17:37 +02:00
EIREXE	85236c4e0f	Optimize rollback hot paths (#53 ) CI / build-and-test (push) Successful in 1m16s Details CI / production-build (push) Successful in 9m36s Details ## Summary Fixes #20. - Reuse fighter animation scratch and output buffers across rollback frames. - Select air-collision hits in one pass without candidate allocations or sorting. - Index contiguous replay input frames directly and binary-search checksums. - Add regression tests for buffer reuse and replay lookup/validation. Reviewed-on: #53 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-20 12:41:13 +00:00
EIREXE	bcf1e114ef	Add script to debug fixed point numbers in lldb CI / build-and-test (push) Successful in 1m33s Details CI / production-build (push) Successful in 9m46s Details	2026-09-20 13:35:43 +02:00
EIREXE	15f07edaaf	Add stocks UI (#52 ) CI / build-and-test (push) Successful in 1m16s Details CI / production-build (push) Successful in 9m38s Details Reviewed-on: #52 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-20 11:34:45 +00:00
EIREXE	1276562890	Rename pending match to match config and add match state (#51 ) CI / build-and-test (push) Successful in 1m17s Details CI / production-build (push) Successful in 9m37s Details Reviewed-on: #51 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-20 11:13:15 +00:00
EIREXE	769d82573a	Build Windows executable in shared Steam depot (#50 ) CI / build-and-test (push) Successful in 1m20s Details CI / production-build (push) Successful in 9m36s Details ## Summary - install the nightly Windows MSVC target and cargo-xwin in CI - build the production Windows executable alongside Linux - package both executables and only imported_assets in one Steam depot Reviewed-on: #50 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-19 21:40:15 +00:00
EIREXE	9ba8697d57	Include missing battlefield icon CI / build-and-test (push) Successful in 1m10s Details CI / production-build (push) Successful in 5m5s Details	2026-09-19 21:54:33 +02:00
EIREXE	7d9b6aeafc	Fix headless asset preprocessing hang (#49 ) CI / build-and-test (push) Successful in 1m9s Details CI / production-build (push) Successful in 5m23s Details ## Summary - register Bevy's image loader explicitly in the headless asset processor - use no GPU-compressed image formats because the processor has no render device - allow PNG processing tasks to complete so `ProcessorState` reaches `Finished` Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-19 19:07:39 +00:00
EIREXE	ab6aec70c5	Fix processed RON assets being ignored (#48 ) CI / build-and-test (push) Successful in 1m9s Details CI / production-build (push) Canceled after 10m37s Details ## Summary - share custom RON asset loaders between the game and asset processor - register image, font, and glTF loaders in the headless processor - prevent `game_settings.ron` and `game.stylesheet.ron` from receiving ignored processed metadata Reviewed-on: #48 Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>	2026-09-19 18:09:40 +00:00