学步园

没有花太多的时间去研究，所以效果一般，不是很满意。烟雾是由屏幕右方飘向左方的。如果换为竖直方向感觉更像蒸汽效果。

不多说了，放代码：

	@Override
	protected Scene onCreateScene() {
		final Scene scene = new Scene();

		Sprite background = new Sprite(0, 0, backgroundTextureRegion, getVertexBufferObjectManager());
		scene.attachChild(background);

		RectangleParticleEmitter emitter = new RectangleParticleEmitter(CAMERA_WIDTH, CAMERA_HEIGHT / 2, 1, CAMERA_HEIGHT);

		final SpriteParticleSystem particleSystem = new SpriteParticleSystem(emitter, 10, 90, 360, mParticleTextureRegion, getVertexBufferObjectManager());

		particleSystem.addParticleInitializer(new ColorParticleInitializer<Sprite>(0.45f, 0.45f, 0.45f));
		particleSystem.addParticleInitializer(new AlphaParticleInitializer<Sprite>(0));
		particleSystem.addParticleInitializer(new BlendFunctionParticleInitializer<Sprite>(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE));
		particleSystem.addParticleInitializer(new VelocityParticleInitializer<Sprite>(-50, -5, -5, 5));
		particleSystem.addParticleInitializer(new RotationParticleInitializer<Sprite>(0.0f, 360.0f));
		particleSystem.addParticleInitializer(new ExpireParticleInitializer<Sprite>(9));

		particleSystem.addParticleModifier(new ScaleParticleModifier<Sprite>(0, 1, 1.0f, 3.0f));
		particleSystem.addParticleModifier(new ColorParticleModifier<Sprite>(0, 2, 0, 0.45f, 0, 0.45f, 0, 0.45f));
		particleSystem.addParticleModifier(new ColorParticleModifier<Sprite>(3, 5, 0.45f, 0, 0.45f, 0, 0.45f, 0));
		particleSystem.addParticleModifier(new ColorParticleModifier<Sprite>(6, 9, 0, 0.45f, 0, 0.45f, 0, 0.45f));
		particleSystem.addParticleModifier(new AlphaParticleModifier<Sprite>(0, 1, 0, 0.25f));
		particleSystem.addParticleModifier(new AlphaParticleModifier<Sprite>(2, 5, 0.25f, 0));
		particleSystem.addParticleModifier(new AlphaParticleModifier<Sprite>(6, 7, 0.25f, 0));
		particleSystem.addParticleModifier(new AlphaParticleModifier<Sprite>(8, 9, 0.25f, 0));

		scene.attachChild(particleSystem);

		scene.setOnSceneTouchListener(new IOnSceneTouchListener() {
			public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent) {
				if (pSceneTouchEvent.isActionUp()) {
					particleSystem.setParticlesSpawnEnabled(false);
				}
				return false;
			}
		});

		return scene;
	}

粒子效果使用的图片还是AndEngine例子中的图片。