feat: More AnimatedSprite methods

src/anim/sprite.rs

@@ -5,6 +5,8 @@ use std::{collections::HashMap, time::Duration};
 use bevy::prelude::*;
 use bevy_ecs::system::EntityEntryCommands;
 
+type SpriteCommands<'a> = EntityEntryCommands<'a, Sprite>;
+
 /// Data for [AnimatedSprite]
 #[derive(Clone, PartialEq, Debug, Default, Reflect)]
 #[reflect(Clone, PartialEq, Debug, Default)]
@@ -19,6 +21,7 @@ pub struct AnimationData {
 
 impl AnimationData {
     /// Construct new [AnimationData] from given [Handle<TextureAtlasLayout>]
+    #[inline(always)]
     pub fn new(image: Handle<Image>, frames: Handle<TextureAtlasLayout>, duration_multiplier: f32) -> Self {
         Self { image, frames, duration_multiplier }
     }
@@ -33,36 +36,41 @@ pub struct AnimatedSprite {
     current: Option<AnimationData>,
     timer: Timer,
     duration: Duration,
+    backwards: bool,
 }
 
 impl AnimatedSprite {
     /// Constructs new AnimatedSprite
+    #[inline(always)]
     pub fn new(data: HashMap<String, AnimationData>, duration: Duration) -> Self {
         let timer = Timer::new(duration, TimerMode::Once);
 
-        Self { data, current: None, timer, duration }
+        Self { data, current: None, timer, duration, backwards: false }
     }
 
     /// Add new animation to sprite
+    #[inline(always)]
     pub fn add(&mut self, data: AnimationData, label: String) {
         self.data.insert(label, data);
     }
 
     /// Sets internal duration
+    #[inline(always)]
     pub fn set_duration(&mut self, duration: Duration) {
         self.duration = duration;
     }
 
-    /// Finds animation by its label and returns it if started playing
-    pub fn play(
+    fn play_inner(
         &mut self,
         label: &str,
         mode: TimerMode,
-        mut sprite: EntityEntryCommands<Sprite>,
+        mut sprite: SpriteCommands,
+        backwards: bool,
     ) -> Option<&AnimationData> {
         self.data.get(label).map(|data| {
             self.current = Some(data.clone());
             self.timer = Timer::new(self.duration.mul_f32(data.duration_multiplier), mode);
+            self.backwards = backwards;
 
             let sprite_image = data.image.clone();
             let layout = data.frames.clone();
@@ -75,15 +83,55 @@ impl AnimatedSprite {
             data
         })
     }
+
+    /// Finds animation by its label, plays it and returns it if started playing
+    #[inline(always)]
+    pub fn play(
+        &mut self,
+        label: &str,
+        mode: TimerMode,
+        sprite: SpriteCommands,
+    ) -> Option<&AnimationData> {
+        self.play_inner(label, mode, sprite, false)
+    }
+
+    /// Same as [play](AnimatedSprite::play), but animation plays from the end to the beginning
+    #[inline(always)]
+    pub fn play_backwards(
+        &mut self,
+        label: &str,
+        mode: TimerMode,
+        sprite: SpriteCommands,
+    ) -> Option<&AnimationData> {
+        self.play_inner(label, mode, sprite, true)
+    }
+
+    /// Stops the animation
+    #[inline(always)]
+    pub fn stop(&mut self) {
+        self.current = None;
+        self.timer.reset();
+    }
     
     /// Updates animation timer
+    #[inline(always)]
     pub fn tick(&mut self, dt: Duration) {
         self.timer.tick(dt);
     }
 
-    /// Returns inner [Timer::fraction]
+    /// Returns inner [Timer::fraction] or [Timer::fraction_remaining] if playing backwards
+    #[inline(always)]
     pub fn fraction(&self) -> f32 {
-        self.timer.fraction()
+        match self.backwards {
+            true => self.timer.fraction_remaining(),
+            false => self.timer.fraction(),
+        }
+    }
+
+    /// Returns [Timer::mode]
+    #[inline(always)]
+    pub fn mode(&self) -> TimerMode {
+        self.timer.mode()
     }
 }
 
@@ -107,7 +155,7 @@ pub fn update_animated_sprites(
 
         let max_frames = atlas.len() as f32;
 
-        let current_frame = (max_frames * animation.fraction()) as usize;
+        let current_frame = (max_frames * animation.fraction()).min(max_frames - 1.) as usize;
 
         if let Some(atlas) = &mut sprite.texture_atlas {
             atlas.index = current_frame;