Increment animation frame

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - You can now import [yal.cc](https://yal.cc/tools/pixel-font/) fonts directly from the json + png / aseprite file without having to go via ttf.
 
+### Changed
+
+- `Tag::animation_frame` now increments the provided frame.
+
 ## [0.23.1] - 2026/02/07
 
 - Minor release to fix problems with publishing 0.23.0.

agb/src/display/object/sprites/sprite.rs

@@ -333,7 +333,7 @@ impl Tag {
     /// animating sprites efficiently.
     pub fn animation_frame(&self, idx: &mut usize, divider: u32) -> &'static Sprite {
         let divided = *idx >> divider;
-        let idx = match self.direction {
+        let frame = match self.direction {
             Direction::Forward => {
                 if divided >= self.sprites.len() {
                     *idx = 0;
@@ -362,7 +362,9 @@ impl Tag {
             }
         };
 
-        &self.sprites[idx]
+        *idx += 1;
+
+        &self.sprites[frame]
     }
 
     #[doc(hidden)]

book/games/platform/src/main.rs

@@ -155,8 +155,6 @@ impl Player {
     }
 
     fn update_sprite(&mut self) {
-        self.frame += 1;
-
         if self.velocity.x > num!(0.1) {
             self.flipped = false;
         }

book/src/platformer/06_the_player.md

@@ -161,8 +161,6 @@ We need to update the sprite based on the player's state:
 ```rust
 impl Player {
     fn update_sprite(&mut self) {
-        self.frame += 1;
-
         // We need to keep track of the facing direction rather than
         // deriving it because the zero velocity case needs to keep
         // facing the same direction.