[SOLVED] Particles rendered from behind a wall :(

Troubleshooting graphics
1

Hello!



Now it’s time to play with particles n_n



Basic, but first decent result:







Yay! Lovely particles n_n



Ok, now we can suppose this post is related to a question :slight_smile:



Look at the “fountain” from behind:







Woa. Water from chernobyl, you can see it through walls…



I thought all I needed was a bounding box:


      Box wallBox = new Box("wall", new Vector3f(), new Vector3f(0.5f, 2,
            0.5f));
      StaticPhysicsNode wall = getPhysicsSpace().createStaticNode();
      wall.attachChild(wallBox);
      wall.generatePhysicsGeometry();

      wall.setModelBound(new BoundingBox());
      wall.updateModelBound();



The same has been made for the particle system:

      particles.setModelBound(new BoundingBox());
      particles.updateModelBound();



-> Now I feel ModelBounds are not meant to that kind of end... they're for picking purpose so?

Not yet feeling easy with rendering, I felt this would perhaps help:

wall.setRenderQueueMode(Renderer.QUEUE_OPAQUE);


particles.setRenderQueueMode(Renderer.QUEUE_TRANSPARENT);



but no, it doesn't :(

Hmm, please help before it starts looking like a Sorcerer's Apprentice clone, jME version ;)
Thanks!
2

the particles need a zbufferstate

3

Ah thanks, that's the solution n_n



      ZBufferState zstate = display.getRenderer().createZBufferState();
      zstate.setEnabled(true);
      particles.setRenderState(zstate);



But! The answer brings a new question...



The counts show the engine still creates the particles, even if they are not visible... any idea why that could be?

thanks!
4

They are drawn as long as they are in the camera's frustum…  even if they would be obscured by something.

5

Ok thanks for that!

  • This has just made me understand frustum!



    Setting:

cam.setFrustumFar(5);



clearly shows that the particle are not rendered anymore as they leave the camera scope - Framerate improves and counts are back to few.

:D Thanks all!
6
even if they would be obscured by something.

Has anyone worked on occlusion culling??


I could probably handle something like that if not. ;)


I think it would be a decent addition to jME
7

yeah, momoko_fan did.  You should be able to find it on the forums