Player Component
class Player extends SpriteAnimationComponent
with HasGameRef<MyGame>, CollisionCallbacks, KeyboardHandler {
Player() : super(size: Vector2(64, 64), anchor: Anchor.center);
final _velocity = Vector2.zero();
static const speed = 200.0;
int health = 3;
@override
Future<void> onLoad() async {
animation = SpriteAnimation.fromFrameData(
game.images.fromCache('player_run.png'),
SpriteAnimationData.sequenced(
amount: 8, stepTime: 0.1,
textureSize: Vector2(32, 32),
),
);
add(RectangleHitbox());
}
@override
void update(double dt) {
super.update(dt);
position.add(_velocity * speed * dt);
}
@override
void onCollisionStart(Set<Vector2> points, PositionComponent other) {
if (other is Enemy) {
health--;
if (health <= 0) game.gameOver();
}
if (other is Pickup) {
other.collect();
}
}
void move(Vector2 direction) {
_velocity.setFrom(direction);
}
}
Enemy Component
class Enemy extends SpriteComponent
with HasGameRef<MyGame>, CollisionCallbacks {
final double speed;
Enemy({required Vector2 position, this.speed = 80})
: super(position: position, size: Vector2(48, 48), anchor: Anchor.center);
@override
Future<void> onLoad() async {
sprite = await game.loadSprite('enemy.png');
add(CircleHitbox());
}
@override
void update(double dt) {
super.update(dt);
// Basit AI: player'a dogru git
final player = game.world.children.query<Player>().firstOrNull;
if (player != null) {
final direction = (player.position - position)..normalize();
position.add(direction * speed * dt);
}
}
}
HUD Component
class GameHud extends PositionComponent with HasGameRef<MyGame> {
late TextComponent _scoreText;
late TextComponent _healthText;
@override
Future<void> onLoad() async {
_scoreText = TextComponent(
text: 'Score: 0',
textRenderer: TextPaint(style: const TextStyle(color: Colors.white, fontSize: 24)),
position: Vector2(20, 20),
);
_healthText = TextComponent(
text: 'HP: 3',
textRenderer: TextPaint(style: const TextStyle(color: Colors.red, fontSize: 24)),
position: Vector2(20, 50),
);
addAll([_scoreText, _healthText]);
}
void updateScore(int score) => _scoreText.text = 'Score: $score';
void updateHealth(int hp) => _healthText.text = 'HP: $hp';
}
Particle Effect
void spawnExplosion(Vector2 position) {
parent?.add(
ParticleSystemComponent(
position: position,
particle: Particle.generate(
count: 20,
lifespan: 0.5,
generator: (i) => AcceleratedParticle(
speed: Vector2(random.nextDouble() * 200 - 100, random.nextDouble() * 200 - 100),
acceleration: Vector2(0, 200),
child: CircleParticle(radius: 3, paint: Paint()..color = Colors.orange),
),
),
),
);
}
RadKod