Andengine粒子碰撞的影響（安卓遊戲開發）

Question

我感興趣的開發粒子引擎，我可以調用類似.createCollisionEffect(pos x, pos y, float duration);

，發動機會造成顆粒的隨機定向骨刺指定的時間。我發現下面的代碼，但我想用3層不同的紋理，因此隨機選擇一個，但我不知道如何管理時間和3層不同的紋理：我發現下面的代碼：

public ParticleSystem createParticleSystem(final TextureRegion textureRegion) { 
    //X & Y for the particles to spawn at. 
    final float particlesXSpawn = 400; 
    final float particlesYSpawn = 300; 

    //Max & min rate are the maximum particles per second and the minimum particles per second. 
    final float maxRate = 10; 
    final float minRate = 5; 

    //This variable determines the maximum particles in the particle system. 
    final int maxParticles = 100; 

    //Particle emitter which will set all of the particles at a ertain point when they are initialized. 
    final PointParticleEmitter pointParticleEmtitter = new PointParticleEmitter(particlesXSpawn, particlesYSpawn); 

    //Creating the particle system. 
    final ParticleSystem particleSystem = new ParticleSystem(pointParticleEmtitter, maxRate, minRate, maxParticles, textureRegion); 

    //And now, lets create the initiallizers and modifiers. 
    //Velocity initiallizer - will pick a random velocity from -20 to 20 on the x & y axes. Play around with this value. 
    particleSystem.addParticleInitializer(new VelocityInitializer(-20, 20, -20, 20)); 

    //Acceleration initializer - gives all the particles the earth gravity (so they accelerate down). 
    particleSystem.addParticleInitializer(new GravityInitializer()); 

    //And now, adding an alpha modifier, so particles slowly fade out. This makes a particle go from alpha = 1 to alpha = 0 in 3 seconds, starting exactly when the particle is spawned. 
    particleSystem.addParticleModifier((IParticleModifier) new AlphaModifier(3, 1, 0)); 

    //Lastly, expire modifier. Make particles die after 3 seconds - their alpha reached 0. 
    particleSystem.addParticleModifier(new ExpireModifier(3)); 

    return particleSystem; 
} 

燦任何人提供一些指導？提前致謝！

Answer 1

您在上面的代碼中具有基礎知識。下面是如何做的，你在找什麼：

1. 創建particleEmitter
2. 創建粒子系統
3. 添加改性劑和初始化給你的粒子所需要的行爲。

而現在的祕密武器：

1. 停止你的粒子系統：particleSystem.setParticlesSpawnEnabled(false);

2. 在碰撞，移動你的粒子發射器，它應該使用發射粒子：particleEmitter.setCenter(xPosition , yPosition);

3. 啓動TimerHandler以在產生粒子的時間結束時關閉粒子。 TimerHandler是一個像處理程序一樣工作的Andengine類，但暫停並繼續遊戲。

這應該做的！