mirror of
https://github.com/flame-engine/flame.git
synced 2025-11-02 11:43:19 +08:00
820950dc39
* Viewport and combinedProjector now belong to Camera * cleanup * format * fix analysis issues * Property viewport removed from BaseGame * Move camera & viewport into a separate directory * added CameraComponent * format * .camera as computed property * changelog note * format * format * comment * CameraComponent is no longer a Component * Rename CameraComponent -> CameraCo * format * Rename CameraC -> CameraWrapper * minor * rename BaseGame._cameraComponent -> ._cameraWrapper * minor fixes in response to reviewer suggestions * Fix rendering of a ParallaxComponent Co-authored-by: Lukas Klingsbo <lukas.klingsbo@gmail.com>
110 lines
2.9 KiB
Dart
110 lines
2.9 KiB
Dart
import 'dart:math';
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import 'package:flame/input.dart';
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import 'package:flame_forge2d/body_component.dart';
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import 'package:flame_forge2d/flame_forge2d.dart';
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import 'package:flame_forge2d/forge2d_game.dart';
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import 'package:forge2d/forge2d.dart';
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import 'balls.dart';
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import 'boundaries.dart';
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class CircleShuffler extends BodyComponent {
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final Vector2 _center;
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CircleShuffler(this._center);
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@override
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Body createBody() {
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final bodyDef = BodyDef()
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..type = BodyType.dynamic
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..position = _center + Vector2(0.0, -25.0);
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const numPieces = 5;
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const radius = 6.0;
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final body = world.createBody(bodyDef);
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for (var i = 0; i < numPieces; i++) {
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final xPos = radius * cos(2 * pi * (i / numPieces));
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final yPos = radius * sin(2 * pi * (i / numPieces));
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final shape = CircleShape()
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..radius = 1.2
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..position.setValues(xPos, yPos);
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final fixtureDef = FixtureDef(shape)
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..density = 50.0
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..friction = .1
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..restitution = .9;
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body.createFixture(fixtureDef);
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}
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// Create an empty ground body.
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final groundBody = world.createBody(BodyDef());
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final revoluteJointDef = RevoluteJointDef()
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..initialize(body, groundBody, body.position)
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..motorSpeed = pi
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..maxMotorTorque = 1000000.0
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..enableMotor = true;
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world.createJoint(revoluteJointDef);
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return body;
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}
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}
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class CornerRamp extends BodyComponent {
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final bool isMirrored;
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final Vector2 _center;
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CornerRamp(this._center, {this.isMirrored = false});
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@override
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Body createBody() {
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final shape = ChainShape();
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final mirrorFactor = isMirrored ? -1 : 1;
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final diff = 2.0 * mirrorFactor;
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final vertices = [
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Vector2(diff, 0),
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Vector2(diff + 20.0 * mirrorFactor, 20.0),
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Vector2(diff + 35.0 * mirrorFactor, 30.0),
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];
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shape.createLoop(vertices);
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final fixtureDef = FixtureDef(shape)
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..restitution = 0.0
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..friction = 0.1;
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final bodyDef = BodyDef()
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..position = _center
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..type = BodyType.static;
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return world.createBody(bodyDef)..createFixture(fixtureDef);
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}
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}
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class CircleStressSample extends Forge2DGame with TapDetector {
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CircleStressSample() : super(gravity: Vector2(0, -10.0));
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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 boundaries = createBoundaries(this);
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boundaries.forEach(add);
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final center = screenToWorld(camera.viewport.effectiveSize / 2);
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add(CircleShuffler(center));
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add(CornerRamp(center, isMirrored: true));
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add(CornerRamp(center));
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}
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@override
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void onTapDown(TapDownInfo details) {
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super.onTapDown(details);
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final tapPosition = details.eventPosition.game;
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final random = Random();
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List.generate(15, (i) {
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final randomVector = (Vector2.random() - Vector2.all(-0.5)).normalized();
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add(Ball(tapPosition + randomVector, radius: random.nextDouble()));
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});
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}
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}
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