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a2b8c4c44c
* OpacityEffect example * Add OpacityEffect example * Added test for OpacityEffect * Added changelog entry * Fix dartdocs * Reset rounding errors between runs * Fix test and rounding error * Update rounding error calculation * Rounding error should be private * Bump test epsilon
56 lines
1.6 KiB
Dart
56 lines
1.6 KiB
Dart
import 'package:flame/components.dart';
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import 'package:flame/game.dart';
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import 'package:flame/input.dart';
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import 'package:flame/src/effects2/opacity_effect.dart'; // ignore: implementation_imports
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import 'package:flame/src/effects2/standard_effect_controller.dart'; // ignore: implementation_imports
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import '../../commons/ember.dart';
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class OpacityEffectExample extends FlameGame with TapDetector {
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static const String description = '''
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In this example we show how the `OpacityEffect` can be used in two ways.
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The left Ember will constantly pulse in and out of opacity and the right
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flame will change opacity when you click the screen.
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''';
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late final SpriteComponent sprite;
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@override
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Future<void> onLoad() async {
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await super.onLoad();
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final flameSprite = await loadSprite('flame.png');
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add(
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sprite = SpriteComponent(
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sprite: flameSprite,
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position: Vector2(300, 100),
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size: Vector2(149, 211),
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),
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);
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add(
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Ember(
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position: Vector2(180, 230),
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size: Vector2.all(100),
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)..add(
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OpacityEffect.fadeOut(
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StandardEffectController(
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duration: 1.5,
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reverseDuration: 1.5,
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infinite: true,
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),
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),
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),
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);
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}
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@override
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void onTap() {
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final opacity = sprite.paint.color.opacity;
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if (opacity >= 0.5) {
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sprite.add(OpacityEffect.fadeOut(StandardEffectController(duration: 1)));
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} else {
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sprite.add(OpacityEffect.fadeIn(StandardEffectController(duration: 1)));
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}
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}
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}
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