When objects from a CallList intersect the near plane I get a flicker…, what can I do?
Im using OpenGL and SDL.
Yes it is double buffered.
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When objects from a CallList intersect the near plane I get a flicker…, what can I do?
Im using OpenGL and SDL.
Yes it is double buffered.
It sounds like you’re getting z-fighting.
‘Z-fighting is a phenomenon in 3D rendering that occurs when two or more primitives have similar values in the z-buffer, and is particularly prevalent with coplanar polygons. The effect causes pseudo-random pixels to be rendered with the color of one polygon or another in a non-deterministic manner, varying as the scene is animated, causing one polygon to ‘win’ the z test, then another, and so on.’ (From wikipedia)
You can get more information about the problem in the OpenGL FAQ.
glPolygonOffset might help, but you can also get yourself into trouble with it. Tom Forsyth has a good explanation in his FAQ Note: It talks about ZBIAS, but that’s just the DirectX equivilent.