View frustrum question.

[Murloc992]

I would like to ask about one thing regarding view frustrum and scene nodes. How could I detect if the scene node is FULLY visible by the camera? I mean no vertices go out the screen? I am asking this because I am making rtt system for various sizes of scene nodes and I always want them to be fully visible no matter what size they are. Any advices? I have tried checking the bounding boxes of the node and frustrum but it gives nto what I want.

[randomMesh]

After a quick search i found this. It's not exactly what you want, but i think you can tweak it easily.

[Murloc992]

Well that's actually what I have tried, but sadly it didn't work..

[Lonesome Ducky]

That's exactly what I used, and it works perfectly fine for me. Are you sure you're passing the transformed bounding box and that the box is calculated correctly? Maybe show me a little code that can reproduce the problem?

[Murloc992]

Code is no miracle. It's the same from vitek with transformed box or mine without transformation. The interesting thing is that no matter what the mesh is inside the frustrum, even behind the camera.

[vitek]

You should take a look at this thread. If what I describe is correct, the planes of the view frustum were backward at one time, and that would make my old code misbehave with current versions of Irrlicht (assuming the bug has been fixed). I provide an example testing the node visibility in that thread. I'm pretty sure it worked back in 2007, but there is always a chance that it doesn't work.

If that is the case, you could also lift the implementation of CSceneManager::isCulled() from here and run with that.

Travis