Hi,

I have built a rudimentary 3d engine. All was going well until I implemented a clip frame. Now when I rotate objects im getting some strange warping effects.

I thought I would post some videos to see if anyone had any idea what was happening before posting code.

The model in the video is a torus (believe it or not). Camera set in the middle of it. The torus should rotate around the camera. Half of it off scene - Im clipping triangles if any vertex has a point outside the clipping area.

Here are the clips:

Rotating around bank (z) preserves the geometry for a little while:

Similarly to pitch (x):

Rotating around all Euler Angles:

I'm hoping someone has encountered similar and can point me in the right direction.

Many thanks in advance.

Thank you both for responses.

Turns out you were right Sik. I was calculating new position of each axis and using the value in the next. Using a temporary variable as you suggested fixed the problem (if slowing the frame rate somewhat).

I still have some perspective issues which I suspect are related to my clip matrix. I will post these further problems in a different thread.

Many thanks once again :-)