Preserve grounded motion presentation snapshot

src/fighter/state/dash.rs

@@ -99,7 +99,6 @@ impl FighterStateImpl for DashState {
         ground::apply_grounded_motion(
             state_context.velocity,
             state_context.translation,
-            state_context.prev_translation,
         );
     }
 

src/fighter/state/ground.rs

@@ -6,7 +6,7 @@ use crate::fighter::state::{
     CollisionContext, FighterState, InterruptContext, air, crouch, dash, fall, ground_attack, turn, wait, walk,
 };
 use crate::fighter::{
-    FighterAttributes, FighterPreviousTranslation, FighterTranslation, FighterVelocity,
+    FighterAttributes, FighterTranslation, FighterVelocity,
 };
 use crate::game_settings::GameSettings;
 use crate::math::int::{FGWide, FGi32};
@@ -149,10 +149,8 @@ fn resolve_grounded_position(
 pub fn apply_grounded_motion(
     velocity: &FighterVelocity,
     translation: &mut FighterTranslation,
-    prev_translation: &mut FighterPreviousTranslation,
 ) {
     // Vertical velocity should be 0 on the ground
-    prev_translation.0 = translation.0;
     translation.0 += FGVec2::new(velocity.0.x, FGi32::ZERO);
 }
 
@@ -169,7 +167,7 @@ pub fn update_friction_motion(ctx: &mut crate::fighter::state::UpdateContext) {
 
     let ground_velocity = ctx.velocity.x;
     ctx.velocity.x += apply_grounded_friction(friction, ground_velocity);
-    apply_grounded_motion(ctx.velocity, ctx.translation, ctx.prev_translation);
+    apply_grounded_motion(ctx.velocity, ctx.translation);
 }
 
 pub fn collide_with_stage_grounded(
@@ -246,7 +244,7 @@ pub fn collision_interrupt(ctx: &mut CollisionContext, can_walk_off: bool) -> Op
 mod tests {
     use super::*;
     use crate::fighter::ecb::FighterPreviousECB;
-    use crate::fighter::{FighterECB, FighterSurfaceState};
+    use crate::fighter::{FighterECB, FighterPreviousTranslation, FighterSurfaceState};
     use crate::stage::line::StagePolyType;
     use crate::input::FighterInput;
 

src/fighter/state/ground_attack.rs

@@ -50,7 +50,6 @@ impl FighterStateImpl for GroundAttackState {
                 ground::apply_grounded_motion(
                     state_context.velocity,
                     state_context.translation,
-                    state_context.prev_translation,
                 );
             } else {
                 ground::update_friction_motion(state_context);

src/fighter/state/run.rs

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

src/fighter/state/walk.rs

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