Implement hitstop shake (#42)

Reviewed-on: #42
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/motion.rs

@@ -5,6 +5,8 @@ use bevy::prelude::*;
 use bevy_ggrs::GgrsFrameTiming;
 
 use crate::debug_tools::PresentationMotionMode;
+use crate::fighter::{FighterHitstopShake};
+use crate::game_settings::GameSettings;
 use crate::{
     fighter::{FighterECB, FighterFacingDirection, baked_animation::FixedMat4},
     math::{int::FGi32, vec::FGVec2, vec3::FGVec3},
@@ -58,13 +60,15 @@ pub fn apply_fighter_translation_to_visuals(
         &FighterTranslation,
         &FighterPreviousTranslation,
         &FighterECB,
+        &FighterHitstopShake,
         &mut Transform,
     )>,
     timing: Res<GgrsFrameTiming>,
     debug_settings: Res<crate::debug_tools::DebugSettings>,
+    game_settings: Res<GameSettings>,
 ) {
     let overstep_fraction = timing.overstep_fraction();
-    for (translation, previous_translation, ecb, mut transform) in query {
+    for (translation, previous_translation, ecb, hitstop_shake, mut transform) in query {
         let translation = sample_presentation_translation(
             *previous_translation,
             *translation,
@@ -77,6 +81,28 @@ pub fn apply_fighter_translation_to_visuals(
             translation.y + bottom.y.to_num::<f32>(),
             0.0,
         );
+
+        if hitstop_shake.remaining_frames > 0 && 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 shake_multiplier = match hitstop_shake.role {
+                super::FighterHitstopShakeRole::Attacker => game_settings.fighter_common.attacker_visual_shake_multiplier,
+                super::FighterHitstopShakeRole::Receiver => 1.0,
+            };
+            let shake_amount: f32 = 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_offset = match hitstop_shake.kind {
+                super::FighterHitstopShakeKind::Horizontal => Vec3::new(shake_amount, 0.0, 0.0),
+                super::FighterHitstopShakeKind::Vertical => Vec3::new(0.0, shake_amount, 0.0),
+            };
+
+            transform.translation += shake_offset;
+        }
     }
 }
 
@@ -85,22 +111,15 @@ pub fn apply_air_motion(
         &FighterVelocity,
         &mut FighterTranslation,
         &mut FighterPreviousTranslation,
-        &mut Transform,
     )>,
     _time: Res<Time<Fixed>>,
 ) {
-    for (velocity, mut translation, mut prev_translation, _transform) in fighters {
+    for (velocity, mut translation, mut prev_translation) in fighters {
         prev_translation.0 = translation.0;
         translation.0 += velocity.0;
     }
 }
 
-pub fn copy_fighter_transform_to_visuals(fighters: Query<(&FighterTranslation, &mut Transform)>) {
-    for (translation, mut transform) in fighters {
-        transform.translation = Vec3::new(translation.x.to_num(), translation.y.to_num(), 0.0);
-    }
-}
-
 pub fn fighter_movement() {}
 
 pub fn snapshot_fighter_motion(