How to use

ParticleEmitter

in

com.jme3.effect

@Override
public void simpleInitApp() {
 ParticleEmitter fire = 
     new ParticleEmitter("Emitter", ParticleMesh.Type.Triangle, 30);
 Material mat_red = new Material(assetManager, 
     "Common/MatDefs/Misc/Particle.j3md");
 mat_red.setTexture("Texture", assetManager.loadTexture(
     "Effects/Explosion/flame.png"));
 fire.setMaterial(mat_red);
 fire.setImagesX(2); 
 fire.setImagesY(2); // 2x2 texture animation
 fire.setEndColor(  new ColorRGBA(1f, 0f, 0f, 1f));   // red
 fire.setStartColor(new ColorRGBA(1f, 1f, 0f, 0.5f)); // yellow
 fire.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 2, 0));
 fire.setStartSize(1.5f);
 fire.setEndSize(0.1f);
 fire.setGravity(0, 0, 0);
 fire.setLowLife(1f);
 fire.setHighLife(3f);
 fire.getParticleInfluencer().setVelocityVariation(0.3f);
 rootNode.attachChild(fire);
     new ParticleEmitter("Debris", ParticleMesh.Type.Triangle, 10);
 Material debris_mat = new Material(assetManager, 
     "Common/MatDefs/Misc/Particle.j3md");
 debris_mat.setTexture("Texture", assetManager.loadTexture(
     "Effects/Explosion/Debris.png"));
 debris.setMaterial(debris_mat);
 debris.setImagesX(3); 
 debris.setImagesY(3); // 3x3 texture animation

  private void makeSoftParticleEmitter(Spatial scene, boolean enabled) {
    if (scene instanceof Node) {
      Node n = (Node) scene;
      for (Spatial child : n.getChildren()) {
        makeSoftParticleEmitter(child, enabled);
      }
    }
    if (scene instanceof ParticleEmitter) {
      ParticleEmitter emitter = (ParticleEmitter) scene;
      if (enabled) {
        enabledSoftParticles = enabled;

        emitter.getMaterial().selectTechnique("SoftParticles", renderManager);
        if( processor.getNumSamples()>1){
          emitter.getMaterial().setInt("NumSamplesDepth", processor.getNumSamples());
        }
        emitter.getMaterial().setTexture("DepthTexture", processor.getDepthTexture());               
        emitter.setQueueBucket(RenderQueue.Bucket.Translucent);

        logger.log(Level.FINE, "Made particle Emitter {0} soft.", emitter.getName());
      } else {
        emitter.getMaterial().clearParam("DepthTexture");
        emitter.getMaterial().selectTechnique("Default", renderManager);
        // emitter.setQueueBucket(RenderQueue.Bucket.Transparent);
        logger.log(Level.FINE, "Particle Emitter {0} is not soft anymore.", emitter.getName());
      }
    }
  }
}

emitter.setCullHint(CullHint.Dynamic);
emitter.setEnabled(true);
  emitter.emitAllParticles();
  if (!killParticles.stopRequested) {
    emitter.addControl(killParticles);
    killParticles.stopRequested = true;
  emitter.setParticlesPerSec(particlesPerSeconds);

private void stop() {
  emitter.setParticlesPerSec(0);
  emitted = false;
  if (!killParticles.stopRequested) {
    emitter.addControl(killParticles);
    killParticles.stopRequested = true;
  }
}

@Override
protected void controlUpdate(float tpf) {
  if (remove) {
    emitter.removeControl(this);
    return;
  }
  if (emitter.getNumVisibleParticles() == 0) {
    emitter.setCullHint(CullHint.Always);
    emitter.setEnabled(false);
    emitter.removeControl(this);
    stopRequested = false;
  }
}

  public void onAction(String name, boolean isPressed, float tpf) {
    if ("setNum".equals(name) && isPressed) {
      emit.setNumParticles(5000);
      emit.emitAllParticles();
    }
  }
}, "setNum");

private void createFire() {
  /**
   * Uses Texture from jme3-test-data library!
   */
  ParticleEmitter fire = new ParticleEmitter("Emitter", ParticleMesh.Type.Triangle, 30);
  Material mat_red = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat_red.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
  fire.setMaterial(mat_red);
  fire.setImagesX(2);
  fire.setImagesY(2); // 2x2 texture animation
  fire.setEndColor(new ColorRGBA(1f, 0f, 0f, 1f));   // red
  fire.setStartColor(new ColorRGBA(1f, 1f, 0f, 0.5f)); // yellow
  fire.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 2, 0));
  fire.setStartSize(10f);
  fire.setEndSize(1f);
  fire.setGravity(0, 0, 0);
  fire.setLowLife(0.5f);
  fire.setHighLife(1.5f);
  fire.getParticleInfluencer().setVelocityVariation(0.3f);
  fire.setLocalTranslation(-600, 50, 300);
  fire.setQueueBucket(Bucket.Translucent);
  rootNode.attachChild(fire);
}

ParticleEmitter fire = new ParticleEmitter("Fire", ParticleMesh.Type.Triangle, 30);
fire.setMaterial(material);
fire.setShape(new EmitterSphereShape(Vector3f.ZERO, 0.1f));
fire.setImagesX(2);
fire.setImagesY(2); // 2x2 texture animation
fire.setEndColor(new ColorRGBA(1f, 0f, 0f, 1f)); // red
fire.setStartColor(new ColorRGBA(1f, 1f, 0f, 0.5f)); // yellow
fire.setStartSize(0.6f);
fire.setEndSize(0.01f);
fire.setGravity(0, -0.3f, 0);
fire.setLowLife(0.5f);
fire.setHighLife(3f);
fire.setLocalTranslation(0, 0.2f, 0);
ParticleEmitter smoke = new ParticleEmitter("Smoke", ParticleMesh.Type.Triangle, 30);
smoke.setMaterial(material);
smoke.setShape(new EmitterSphereShape(Vector3f.ZERO, 5));
smoke.setImagesX(1);
smoke.setImagesY(1); // 2x2 texture animation
smoke.setStartColor(new ColorRGBA(0.1f, 0.1f, 0.1f,1f)); // dark gray
smoke.setEndColor(new ColorRGBA(0.5f, 0.5f, 0.5f, 0.3f)); // gray      
smoke.setStartSize(3f);
smoke.setEndSize(5f);
smoke.setGravity(0, -0.001f, 0);
smoke.setLowLife(100f);
smoke.setHighLife(100f);
smoke.setLocalTranslation(0, 0.1f, 0);        
smoke.emitAllParticles();

@Override
public void simpleInitApp() {
  ParticleEmitter emit = new ParticleEmitter("Emitter", Type.Triangle, 200);
  emit.setShape(new EmitterSphereShape(Vector3f.ZERO, 1f));
  emit.setGravity(0, 0, 0);
  emit.setLowLife(5);
  emit.setHighLife(10);
  emit.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 0, 0));
  emit.setImagesX(15);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Smoke/Smoke.png"));
  emit.setMaterial(mat);
  ParticleEmitter emit2 = emit.clone();
  emit2.move(3, 0, 0);
  
  rootNode.attachChild(emit);
  rootNode.attachChild(emit2);
  
  ParticleEmitter emit3 = BinaryExporter.saveAndLoad(assetManager, emit);
  emit3.move(-3, 0, 0);
  rootNode.attachChild(emit3);
}

result = new ParticleEmitter(particleSettings.getName() + nameSuffix, Type.Triangle, totPart);
if (nameSuffix == 'N') {
  return result;// no need to set anything else
switch (from) {
  case PART_FROM_VERT:
    result.setShape(new EmitterMeshVertexShape());
    break;
  case PART_FROM_FACE:
    result.setShape(new EmitterMeshFaceShape());
    break;
  case PART_FROM_VOLUME:
    result.setShape(new EmitterMeshConvexHullShape());
    break;
  default:
result.setGravity(-acc.get(0).floatValue(), -acc.get(1).floatValue(), -acc.get(2).floatValue());
result.setEndColor(new ColorRGBA(1f, 1f, 1f, 1f));
result.setStartColor(new ColorRGBA(1f, 1f, 1f, 1f));
result.setStartSize(size);
result.setEndSize(size);
float lifetime = ((Number) particleSettings.getFieldValue("lifetime")).floatValue() / fps;
float randlife = ((Number) particleSettings.getFieldValue("randlife")).floatValue() / fps;
result.setLowLife(lifetime * (1.0f - randlife));
result.setHighLife(lifetime);

public ParticleEmitter(String name, Type type, int numParticles) {
  super(name);
  setBatchHint(BatchHint.Never);
  this.setIgnoreTransform(true);
  this.setShadowMode(ShadowMode.Off);
  this.setQueueBucket(Bucket.Transparent);
    case Point:
      particleMesh = new ParticlePointMesh();
      this.setMesh(particleMesh);
      break;
    case Triangle:
      particleMesh = new ParticleTriMesh();
      this.setMesh(particleMesh);
      break;
    default:
      throw new IllegalStateException("Unrecognized particle type: " + meshType);
  this.setNumParticles(numParticles);

@Override
public void simpleInitApp() {
  emit = new ParticleEmitter("Emitter", Type.Triangle, 300);
  emit.setGravity(0, 0, 0);
  emit.getParticleInfluencer().setVelocityVariation(1);
  emit.setLowLife(1);
  emit.setHighLife(1);
  emit.getParticleInfluencer()
      .setInitialVelocity(new Vector3f(0, .5f, 0));
  emit.setImagesX(15);
  Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
  mat.setTexture("Texture", assetManager.loadTexture("Effects/Smoke/Smoke.png"));
  emit.setMaterial(mat);
  
  rootNode.attachChild(emit);
  
  inputManager.addListener(new ActionListener() {
    
    public void onAction(String name, boolean isPressed, float tpf) {
      if ("setNum".equals(name) && isPressed) {
        emit.setNumParticles(1000);
      }
    }
  }, "setNum");
  
  inputManager.addMapping("setNum", new KeyTrigger(KeyInput.KEY_SPACE));
}

/**
 * This method clone the Track and search for the cloned counterpart of the
 * original emitter in the given cloned spatial. The spatial is assumed to
 * be the Spatial holding the AnimControl controlling the animation using
 * this Track.
 *
 * @param spatial the Spatial holding the AnimControl
 * @return the cloned Track with proper reference
 */
@Override
public Track cloneForSpatial(Spatial spatial) {
  EffectTrack effectTrack = new EffectTrack();
  effectTrack.particlesPerSeconds = this.particlesPerSeconds;
  effectTrack.length = this.length;
  effectTrack.startOffset = this.startOffset;
  //searching for the newly cloned ParticleEmitter
  effectTrack.emitter = findEmitter(spatial);
  if (effectTrack.emitter == null) {
    logger.log(Level.WARNING, "{0} was not found in {1} or is not bound to this track", new Object[]{emitter.getName(), spatial.getName()});
    effectTrack.emitter = emitter;
  }
  removeUserData(this);
  //setting user data on the new emmitter and marking it with a reference to the cloned Track.
  setUserData(effectTrack);
  effectTrack.emitter.setParticlesPerSec(0);
  return effectTrack;
}

ParticleEmitter emitter = particleEmitter.clone();
char nameSuffix = emitter.getName().charAt(emitter.getName().length() - 1);
if (nameSuffix == 'B' || nameSuffix == 'N') {
  alphaFunction = MaterialHelper.ALPHA_MASK_NONE;
emitter.setName(emitter.getName().substring(0, emitter.getName().length() - 1));
EmitterShape emitterShape = emitter.getShape();
List<Mesh> meshes = new ArrayList<Mesh>();
for (Spatial spatial : node.getChildren()) {
      meshes.add(mesh);
      Material material = materialHelper.getParticlesMaterial(((Geometry) spatial).getMaterial(), alphaFunction, blenderContext);
      emitter.setMaterial(material);// TODO: divide into several pieces

/**
 * Sets the Emitter to use in this track
 *
 * @param emitter
 */
public void setEmitter(ParticleEmitter emitter) {
  if (this.emitter != null) {
    TrackInfo data = (TrackInfo) emitter.getUserData("TrackInfo");
    data.getTracks().remove(this);
  }
  this.emitter = emitter;
  //saving particles per second value
  this.particlesPerSeconds = emitter.getParticlesPerSec();
  //setting the emmitter to not emmit.
  this.emitter.setParticlesPerSec(0);
  setUserData(this);
}

/**
 * Creates and EffectTrack
 *
 * @param emitter the emitter of the track
 * @param length the length of the track (usually the length of the
 * animation you want to add the track to)
 */
public EffectTrack(ParticleEmitter emitter, float length) {
  this.emitter = emitter;
  //saving particles per second value
  this.particlesPerSeconds = emitter.getParticlesPerSec();
  //setting the emmitter to not emmit.
  this.emitter.setParticlesPerSec(0);
  this.length = length;
  //Marking the emitter with a reference to this track for further use in deserialization.
  setUserData(this);
}

/**
 * Callback from Control.render(), do not use.
 *
 * @param rm
 * @param vp
 */
private void renderFromControl(RenderManager rm, ViewPort vp) {
  Camera cam = vp.getCamera();
  if (meshType == ParticleMesh.Type.Point) {
    float C = cam.getProjectionMatrix().m00;
    C *= cam.getWidth() * 0.5f;
    // send attenuation params
    this.getMaterial().setFloat("Quadratic", C);
  }
  Matrix3f inverseRotation = Matrix3f.IDENTITY;
  TempVars vars = null;
  if (!worldSpace) {
    vars = TempVars.get();
    inverseRotation = this.getWorldRotation().toRotationMatrix(vars.tempMat3).invertLocal();
  }
  particleMesh.updateParticleData(particles, cam, inverseRotation);
  if (!worldSpace) {
    vars.release();
  }
}

/**
 * Internal use only serialization
 *
 * @param ex exporter
 * @throws IOException exception
 */
@Override
public void write(JmeExporter ex) throws IOException {
  OutputCapsule out = ex.getCapsule(this);
  //reset the particle emission rate on the emitter before saving.
  emitter.setParticlesPerSec(particlesPerSeconds);
  out.write(emitter, "emitter", null);
  out.write(particlesPerSeconds, "particlesPerSeconds", 0);
  out.write(length, "length", 0);
  out.write(startOffset, "startOffset", 0);
  //Setting emission rate to 0 so that this track can go on being used.
  emitter.setParticlesPerSec(0);
}

public void collision(PhysicsCollisionEvent event) {
  if (space == null) {
    return;
  }
  if (event.getObjectA() == this || event.getObjectB() == this) {
    space.add(ghostObject);
    ghostObject.setPhysicsLocation(getPhysicsLocation(vector));
    space.addTickListener(this);
    if (effect != null && spatial.getParent() != null) {
      curTime = 0;
      effect.setLocalTranslation(spatial.getLocalTranslation());
      spatial.getParent().attachChild(effect);
      effect.emitAllParticles();
    }
    space.remove(this);
    spatial.removeFromParent();
  }
}

public void collision(PhysicsCollisionEvent event) {
  if (event.getObjectA() instanceof BombControl) {
    final Spatial node = event.getNodeA();
    effect.killAllParticles();
    effect.setLocalTranslation(node.getLocalTranslation());
    effect.emitAllParticles();
  } else if (event.getObjectB() instanceof BombControl) {
    final Spatial node = event.getNodeB();
    effect.killAllParticles();
    effect.setLocalTranslation(node.getLocalTranslation());
    effect.emitAllParticles();
  }
}