manager.setEmissionDirection(new Vector3f(0,0,0));
manager.setEmissionDirection(new Vector3f(0,1,0));
  protected void simpleInitGame() {    display.setTitle("Particle System");    lightState.setEnabled(false);    AlphaState as1 = display.getRenderer().createAlphaState();    as1.setBlendEnabled(true);    as1.setSrcFunction(AlphaState.SB_SRC_ALPHA);    as1.setDstFunction(AlphaState.DB_ONE);    as1.setTestEnabled(true);    as1.setTestFunction(AlphaState.TF_GREATER);    as1.setEnabled(true);    TextureState ts = display.getRenderer().createTextureState();    ts.setTexture(        TextureManager.loadTexture(        TestParticleSystem.class.getClassLoader().getResource(        "jmetest/data/texture/flaresmall.jpg"),        Texture.MM_LINEAR_LINEAR,        Texture.FM_LINEAR));    ts.setEnabled(true);    manager = new ParticleManager(300, display.getRenderer().getCamera());    manager.setGravityForce(new Vector3f(0.0f, 0.0f, 0.0f));    manager.setEmissionDirection(new Vector3f(0,0,0));    manager.setParticlesOrigin(new Vector3f(0,0,0));    manager.setInitialVelocity(.006f);    manager.setStartSize(2.5f);    manager.setEndSize(.5f);    manager.setParticlesMinimumLifeTime(1200f);    manager.setStartColor(new ColorRGBA(1, 0, 0, 1));    manager.setEndColor(new ColorRGBA(0, 1, 0, 0));    manager.setEmissionMaximumAngle(360f * FastMath.DEG_TO_RAD);    manager.setControlFlow(false);    manager.setRandomMod(0f);    manager.warmUp(60);    rootNode.setRenderState(ts);    rootNode.setRenderState(as1);		ZBufferState zstate = display.getRenderer().createZBufferState();		zstate.setEnabled(false);		manager.getParticles().setRenderState(zstate);    manager.getParticles().addController(manager);    manager.getParticles().setModelBound(new BoundingSphere());    manager.getParticles().updateModelBound();    rootNode.attachChild(manager.getParticles());  }