Z-buffering is a non-linear depths mapping,which produces artifacts,but W-buffering is a linear depth values mapping.How to enable w-buffering in OpenGL? It can be easily done in MS Direct3D.But In OpenGL, what can I do?
You can’t, OpenGL only support Z-buffering and there’s no extension for supporting it either.
Originally posted by yfn:
Z-buffering is a non-linear depths mapping,which produces artifacts,but W-buffering is a linear depth values mapping.How to enable w-buffering in OpenGL? It can be easily done in MS Direct3D.But In OpenGL, what can I do?
Take a look http://developer.nvidia.com/docs/IO/1331/ATT/ZBuffering2.pdf
there are some hints how to make Z buffer to be linear mapped…(though the text is based on DX not on GL)