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Simple alternating effect controller. Over the course of one period, this controller will proceed linearly from 0 to 1, then to -1, and then back to 0. Use this for oscillating effects where the starting position should be the center of the oscillations, rather than the extreme (as provided by the standard alternating EffectController).
49 lines
1.3 KiB
Dart
49 lines
1.3 KiB
Dart
import 'dart:ui';
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import 'package:flame/components.dart';
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import 'package:flame/effects.dart';
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import 'package:flame/game.dart';
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class EffectControllersExample extends FlameGame {
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static const description = '''
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This page demonstrates application of various non-standard effect
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controllers.
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The first white square has a ZigzagEffectController with period 1. The
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orange square next to it has two move effects, each with a
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ZigzagEffectController.
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''';
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@override
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void onMount() {
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camera.viewport = FixedResolutionViewport(Vector2(400, 600));
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add(
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RectangleComponent.square(
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position: Vector2(20, 50),
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size: 20,
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)..add(
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MoveEffect.by(
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Vector2(0, 20),
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InfiniteEffectController(ZigzagEffectController(period: 1)),
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),
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),
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);
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add(
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RectangleComponent.square(
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position: Vector2(70, 50),
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size: 20,
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paint: Paint()..color = const Color(0xffffbc63),
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)..addAll([
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MoveEffect.by(
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Vector2(0, 20),
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InfiniteEffectController(ZigzagEffectController(period: 8 / 7)),
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),
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MoveEffect.by(
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Vector2(10, 0),
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InfiniteEffectController(ZigzagEffectController(period: 2 / 3)),
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),
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]),
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);
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}
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}
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