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feat(collision detection)!: Use a broadphase to make collision detection more efficient (#1252)

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This commit is contained in:
Lukas Klingsbo
2022-03-07 09:08:32 +01:00
committed by GitHub
parent c61a1c18b5
commit 29dd09ca92
69 changed files with 2973 additions and 2387 deletions
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50
examples/lib/stories/collision_detection/circles_example.dart
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@ -1,11 +1,10 @@
import 'package:flame/collisions.dart';
import 'package:flame/components.dart';
import 'package:flame/extensions.dart';
import 'package:flame/game.dart';
import 'package:flame/geometry.dart';
import 'package:flame/input.dart';
import 'package:flutter/material.dart' hide Image, Draggable;
class CirclesExample extends FlameGame with HasCollidables, TapDetector {
class CirclesExample extends FlameGame with HasCollisionDetection, TapDetector {
static const description = '''
This example will create a circle every time you tap on the screen. It will
have the initial velocity towards the center of the screen and if it touches
@ -14,7 +13,7 @@ class CirclesExample extends FlameGame with HasCollidables, TapDetector {
@override
Future<void> onLoad() async {
add(ScreenCollidable());
add(ScreenHitbox());
}
@override
@ -24,12 +23,11 @@ class CirclesExample extends FlameGame with HasCollidables, TapDetector {
}
class MyCollidable extends PositionComponent
with HasGameRef<CirclesExample>, HasHitboxes, Collidable {
with HasGameRef<CirclesExample>, CollisionCallbacks {
late Vector2 velocity;
final _collisionColor = Colors.amber;
final _defaultColor = Colors.cyan;
bool _isWallHit = false;
bool _isCollision = false;
late ShapeHitbox hitbox;
MyCollidable(Vector2 position)
: super(
@ -40,33 +38,41 @@ class MyCollidable extends PositionComponent
@override
Future<void> onLoad() async {
addHitbox(HitboxCircle());
final defaultPaint = Paint()
..color = _defaultColor
..style = PaintingStyle.stroke;
hitbox = CircleHitbox()
..paint = defaultPaint
..renderShape = true;
add(hitbox);
final center = gameRef.size / 2;
velocity = (center - position)..scaleTo(150);
}
@override
void update(double dt) {
if (_isWallHit) {
super.update(dt);
position.add(velocity * dt);
}
@override
void onCollisionStart(
Set<Vector2> intersectionPoints,
PositionComponent other,
) {
super.onCollisionStart(intersectionPoints, other);
hitbox.paint.color = _collisionColor;
if (other is ScreenHitbox) {
removeFromParent();
return;
}
debugColor = _isCollision ? _collisionColor : _defaultColor;
position.add(velocity * dt);
_isCollision = false;
}
@override
void render(Canvas canvas) {
renderHitboxes(canvas);
}
@override
void onCollision(Set<Vector2> intersectionPoints, Collidable other) {
if (other is ScreenCollidable) {
_isWallHit = true;
return;
void onCollisionEnd(PositionComponent other) {
super.onCollisionEnd(other);
if (!isColliding) {
hitbox.paint.color = _defaultColor;
}
_isCollision = true;
}
}