How to use

setUserData

method

in

com.jme3.effect.ParticleEmitter

@Override
public void cleanUp() {
  TrackInfo t = (TrackInfo) emitter.getUserData("TrackInfo");
  t.getTracks().remove(this);
  if (t.getTracks().isEmpty()) {
    emitter.setUserData("TrackInfo", null);
  }
}

private void setUserData(EffectTrack effectTrack) {
  //fetching the UserData TrackInfo.
  TrackInfo data = (TrackInfo) effectTrack.emitter.getUserData("TrackInfo");
  //if it does not exist, we create it and attach it to the emitter.
  if (data == null) {
    data = new TrackInfo();
    effectTrack.emitter.setUserData("TrackInfo", data);
  }
  //adding the given Track to the TrackInfo.
  data.addTrack(effectTrack);
}

public void cleanUp() {
  TrackInfo t = (TrackInfo) emitter.getUserData("TrackInfo");
  t.getTracks().remove(this);
  if (t.getTracks().isEmpty()) {
    emitter.setUserData("TrackInfo", null);
  }
}

public void cleanUp() {
  TrackInfo t = (TrackInfo) emitter.getUserData("TrackInfo");
  t.getTracks().remove(this);
  if (t.getTracks().isEmpty()) {
    emitter.setUserData("TrackInfo", null);
  }
}

private void setUserData(EffectTrack effectTrack) {
  //fetching the UserData TrackInfo.
  TrackInfo data = (TrackInfo) effectTrack.emitter.getUserData("TrackInfo");
  //if it does not exist, we create it and attach it to the emitter.
  if (data == null) {
    data = new TrackInfo();
    effectTrack.emitter.setUserData("TrackInfo", data);
  }
  //adding the given Track to the TrackInfo.
  data.addTrack(effectTrack);
}

private void setUserData(EffectTrack effectTrack) {
  //fetching the UserData TrackInfo.
  TrackInfo data = (TrackInfo) effectTrack.emitter.getUserData("TrackInfo");
  //if it does not exist, we create it and attach it to the emitter.
  if (data == null) {
    data = new TrackInfo();
    effectTrack.emitter.setUserData("TrackInfo", data);
  }
  //adding the given Track to the TrackInfo.
  data.addTrack(effectTrack);
}