On 16.06.2008 18:17, H. Verbeet wrote: > 2008/6/16 Brian Paul <[EMAIL PROTECTED]>: >> H. Verbeet wrote: >>> ------------------------------------------------------------------------ >>> >>> Vertex programs replace fog coord generation, but not vertex fog >>> application. This also means the fog stage should be run after the vertex >>> program stage. >> Hmmm, can you point me to where this is stated in the vertex program >> extension spec? I don't recall seeing this before. >> > > Although it doesn't explicitly say vertex programs don't replace > vertex fog application, it's implied by the following parts of the > spec: >From this also follows that it's not possible to use per-vertex fog when using fragment programs (or shaders) - or rather mesa's implementation doesn't really allow it (since it would overwrite the fogcoord with fog factors, but fogcoord might still be accessed freely in a fragment program). Maybe that's only of academic interest though and noone really abuses fogcoord like that :-).
Roland ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Mesa3d-dev mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
