Add live hitbox viewer

src/fighter/baked_animation/asset_baking.rs

@@ -154,6 +154,7 @@ type FighterBakeProcessor = LoadTransformAndSave<
 >;
 
 pub struct BakedAnimationPlugin;
+pub struct BakedAnimationVisualPlugin;
 
 pub struct BakedAnimationAssetProcessingPlugin;
 
@@ -172,17 +173,27 @@ impl Plugin for BakedAnimationAssetProcessingPlugin {
 
 impl Plugin for BakedAnimationPlugin {
     fn build(&self, app: &mut App) {
-        app.add_plugins(BakedAnimationAssetProcessingPlugin)
-            .add_systems(
-                bevy_ggrs::prelude::GgrsSchedule,
-                super::runtime::update_fighter_bone_matrices
-                    .in_set(crate::schedule::GameplaySet::Animation),
-            )
-            .add_systems(
-                Update,
-                super::visual_binding::apply_baked_fighter_visual_pose,
-            )
-            .add_observer(super::visual_binding::bind_fighter_visual_bones);
+        app.add_plugins((
+            BakedAnimationAssetProcessingPlugin,
+            BakedAnimationVisualPlugin,
+        ))
+        .add_systems(
+            bevy_ggrs::prelude::GgrsSchedule,
+            super::runtime::update_fighter_bone_matrices
+                .in_set(super::BakedAnimationSamplingSet)
+                .in_set(crate::schedule::GameplaySet::Animation),
+        );
+    }
+}
+
+impl Plugin for BakedAnimationVisualPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_systems(
+            Update,
+            super::visual_binding::apply_baked_fighter_visual_pose
+                .after(super::BakedAnimationSamplingSet),
+        )
+        .add_observer(super::visual_binding::bind_fighter_visual_bones);
     }
 }
 

src/fighter/baked_animation/mod.rs

@@ -5,12 +5,17 @@ mod runtime;
 mod visual_binding;
 
 pub use crate::math::fixed_transform::FixedMat4;
-pub use asset_baking::{BakedAnimationAssetProcessingPlugin, BakedAnimationPlugin};
+pub use asset_baking::{
+    BakedAnimationAssetProcessingPlugin, BakedAnimationPlugin, BakedAnimationVisualPlugin,
+};
 pub use runtime::{
     BakedAnimationClip, BakedFighterAnimations, FighterBoneIndexMap, FighterBoneMatrices,
     resample_fighter_bone_matrices, update_fighter_bone_matrices,
 };
 
+#[derive(bevy::prelude::SystemSet, Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct BakedAnimationSamplingSet;
+
 pub const BAKED_ANIMATION_FPS: u32 = 60;
 
 #[cfg(test)]

src/fighter/baked_animation/runtime.rs

@@ -55,6 +55,29 @@ impl BakedFighterAnimations {
     pub fn frame_count(&self, kind: AnimKind) -> Option<u32> {
         self.clip(kind).map(|clip| clip.frames.len() as u32)
     }
+    /// Samples one bone in model space without depending on the runtime's
+    /// previous-frame buffers. Tooling uses this when the user scrubs between
+    /// unrelated frames.
+    pub fn sample_bone_model_transform(
+        &self,
+        frame: &FighterAnimationFrame,
+        bone: &str,
+        model_scale: FGi32,
+    ) -> Option<FixedMat4> {
+        let local = self.sample_pose(frame)?;
+        let index = self.bone_names.iter().position(|name| name == bone)?;
+        let mut model = vec![None; local.len()];
+        resolve_model_transform(index, &self.parents, local, &mut model).ok()?;
+        let scale = FixedMat4 {
+            cols: [
+                [model_scale, FGi32::ZERO, FGi32::ZERO, FGi32::ZERO],
+                [FGi32::ZERO, model_scale, FGi32::ZERO, FGi32::ZERO],
+                [FGi32::ZERO, FGi32::ZERO, model_scale, FGi32::ZERO],
+                [FGi32::ZERO, FGi32::ZERO, FGi32::ZERO, FGi32::ONE],
+            ],
+        };
+        Some(scale.mul(model[index]?))
+    }
     pub(super) fn clip(&self, kind: AnimKind) -> Option<&BakedAnimationClip> {
         self.clip_indices
             .get(&kind)
@@ -78,6 +101,26 @@ pub struct FighterBoneMatrices {
 pub struct FighterBoneIndexMap(pub HashMap<String, usize>);
 
 impl FighterBoneMatrices {
+    /// Samples a baked pose for a preview or other non-gameplay caller.
+    pub fn sample_baked_pose(
+        &mut self,
+        baked: &BakedFighterAnimations,
+        frame: &FighterAnimationFrame,
+        model_scale: FGi32,
+    ) -> bool {
+        let Some(pose) = baked.sample_pose(frame) else {
+            return false;
+        };
+        self.set_pose(
+            frame.kind,
+            &baked.bone_names,
+            &baked.parents,
+            pose,
+            model_scale,
+        );
+        true
+    }
+
     #[cfg(test)]
     pub(super) fn buffer_capacities(&self) -> [usize; 5] {
         [

src/fighter/baked_animation/visual_binding.rs

@@ -92,9 +92,12 @@ pub(super) fn bind_fighter_visual_bones(
 pub(super) fn apply_baked_fighter_visual_pose(
     mut nodes: Query<(&mut Transform, &BakedFighterBone)>,
     fighters: Query<&FighterBoneMatrices>,
-    timing: Res<GgrsFrameTiming>,
+    timing: Option<Res<GgrsFrameTiming>>,
 ) {
-    let overstep_fraction = timing.overstep_fraction();
+    let overstep_fraction = timing
+        .as_deref()
+        .map(GgrsFrameTiming::overstep_fraction)
+        .unwrap_or(0.0);
     for (mut transform, bone) in &mut nodes {
         let Ok(matrices) = fighters.get(bone.fighter) else {
             continue;