mirror of
https://github.com/flame-engine/flame.git
synced 2025-10-31 00:48:47 +08:00
8b132d7c0b
* Animations, CameraAndViewport, CollisionDetection and Components unified * Added descriptions to effects * Rename input games * Unify input stories * Add info to parallax section * Added descriptions to the rendering examples * Add descriptions to the sprites directory * Fix utils and rendering section * Add descriptions to the widgets section * Delete directory that rebase brought back * Unify game names * Added some styleguide docs for examples * Fix analyze issues * All files should have _example as suffix * Made the FollowComponentExample a bit easier to understand * Change priority of ember
107 lines
2.7 KiB
Dart
107 lines
2.7 KiB
Dart
import 'dart:math';
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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/extensions.dart';
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import 'package:flame/game.dart';
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import 'package:flame/geometry.dart';
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import 'package:flame/input.dart';
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import 'package:flame/palette.dart';
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enum Shapes { circle, rectangle, polygon }
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class SimpleShapesExample extends FlameGame with HasTappables {
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static const description = '''
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An example which adds random shapes on the screen when you tap it, if you
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tap on an already existing shape it will remove that shape and replace it
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with a new one.
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''';
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final _rng = Random();
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MyShapeComponent randomShape(Vector2 position) {
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final shapeType = Shapes.values[_rng.nextInt(Shapes.values.length)];
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final shapeSize =
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Vector2.all(100) + Vector2.all(50.0).scaled(_rng.nextDouble());
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final shapeAngle = _rng.nextDouble() * 6;
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switch (shapeType) {
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case Shapes.circle:
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return MyShapeComponent(
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HitboxCircle(),
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position: position,
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size: shapeSize,
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angle: shapeAngle,
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);
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case Shapes.rectangle:
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return MyShapeComponent(
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HitboxRectangle(),
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position: position,
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size: shapeSize,
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angle: shapeAngle,
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);
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case Shapes.polygon:
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final points = [
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Vector2.random(_rng),
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Vector2.random(_rng)..y *= -1,
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-Vector2.random(_rng),
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Vector2.random(_rng)..x *= -1,
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];
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return MyShapeComponent(
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HitboxPolygon(points),
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position: position,
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size: shapeSize,
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angle: shapeAngle,
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);
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}
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}
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@override
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void onTapDown(int pointerId, TapDownInfo info) {
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super.onTapDown(pointerId, info);
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final tapPosition = info.eventPosition.game;
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final component = randomShape(tapPosition);
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add(component);
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component.add(
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MoveEffect(
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path: [size / 2],
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speed: 30,
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isAlternating: true,
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isInfinite: true,
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),
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);
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component.add(
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RotateEffect(
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angle: 3,
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speed: 0.4,
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isAlternating: true,
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isInfinite: true,
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),
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);
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}
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}
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class MyShapeComponent extends ShapeComponent with Tappable {
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@override
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final Paint paint = BasicPalette.red.paint()..style = PaintingStyle.stroke;
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MyShapeComponent(
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HitboxShape shape, {
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Vector2? position,
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Vector2? size,
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double? angle,
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}) : super(
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shape,
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position: position,
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size: size,
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angle: angle,
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anchor: Anchor.center,
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);
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@override
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bool onTapDown(TapDownInfo _) {
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removeFromParent();
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return true;
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}
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}
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