How to add ParticleSystem without entity and without disturbing UI

[mazingerz01]

I have some JavaFX buttons in my UI, which are added via
getGameScene().addUINode(...);
If I do:
@Override protected void initGame() { getGameScene().getContentRoot().getChildren().add(particleSystem.getPane()); }
the pane of the ParticleSystem makes it impossible to cklick the UI buttons (which should always stay on top). However, this is only the case as long a ParticleEmitter is "running" in the ParticleSystem. The Emitter has a setExpireFunction and after that, the UI goes back to normal behavior. As long as the ParticleEmitter is running, the UI behaaviour is like
getGameScene().setUIMouseTransparent(**true**);
was set.
Thanks for any tip!

[AlmasB]

The particle system has a pane, which acts as the root container. Perhaps you can set its mouse transparency to true? Then in theory all events should go straight to underlying nodes.

On another note, getGameScene().addUINode() is the correct one, avoid using getGameScene().getContentRoot(), which is reserved for system access.

Let me know if setting the particle pane mouse transparent helps.

[mazingerz01]

Thanks for the tip regarding setMouseTransparence - it worked.

As for the getGameScene().getContentRoot(): I add the particleSystem in the initGame() method in this way because it is definitely not part of the UI. It is a part of the game and the emitters are not attached to any entities so I figured .addUINode() would be wrong.

Is there a better way to add a particleSystem to the game (not the UI)? I could use getGameScene().addChild() but it does the same as
getGameScene().getContentRoot().getChildren().add(), although more elegantly tho.

[AlmasB]

If it's part of the game, I would use ParticleComponent (which takes ParticleEmitter) with an entity. Might give you a lot more control actually, since you can move an entity around and dictate its life cycle. See if that works for your use case.

[mazingerz01]

Thanks, I didn't want to use a ParticleComponent because these particles are not attached to an entity. However, I could use some invisible entities for this.