fix: correctly calculating frame length (#1578)

flame-engine · Apr 26, 2022 · efda45e · efda45e
1 parent 8e81261
commit efda45e
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/packages/flame/lib/src/sprite_animation.dart b/packages/flame/lib/src/sprite_animation.dart
@@ -84,17 +84,17 @@ class SpriteAnimationData {
  this.loop = true,
  }) : assert(amountPerRow == null || amount >= amountPerRow),
  assert(start <= end && start >= 0 && end <= amount),
- assert(stepTimes.length == end - start) {
+ assert(stepTimes.length >= end - start + 1) {
  amountPerRow ??= amount;
  texturePosition ??= Vector2.zero();
- frames = List<SpriteAnimationFrameData>.generate(end - start, (index) {
+ frames = List<SpriteAnimationFrameData>.generate(end - start + 1, (index) {
  final i = index + start;
  final position = Vector2(
  texturePosition!.x + (i % amountPerRow!) * textureSize.x,
  texturePosition.y + (i ~/ amountPerRow) * textureSize.y,
  );
  return SpriteAnimationFrameData(
- stepTime: stepTimes[i],
+ stepTime: stepTimes[index],
  srcPosition: position,
  srcSize: textureSize,
  );