Framebuffer objects

[Ivan Gyurdiev]

>
> (2) Attempting to bind a framebuffer using GL_RGB32F_ARB, and 
> GL_RGBA32F_ARB formats will fail on my hardware (Nvidia GeForce 
> 6800GS) with error GL_FRAMEBUFFER_UNSUPPORTED_EXT, which means the 
> format combination was invalid for implementation-dependent reasons. 
> However, this doesn't make sense, based on information online, which 
> indicates this should work. See:
> http://www.mathematik.uni-dortmund.de/~goeddeke/gpgpu/tutorial.htm : 
> "Using textures as render targets".... or google.
> This is a problem, since certain demos which make use of the R32F 
> format won't work with FBOs - but oddly work with pbuffers.
> See SoftShadowsII: http://www.humus.ca/index.php?page=3D&&start=8
> On the other hand I know R16F -> GL_RGB16F works fine, based on 3Dc demo.
I'm seeing in quite a few places that this must be done to fix the issue 
of floating point textures:
GL_TEXTURE_WRAP_S -> GL_CLAMP_TO_EDGE
GL_TEXTURE_WRAP_T -> GL_CLAMP_TO_EDGE
GL_TEXTURE_MIN -> GL_NEAREST
GL_TEXTURE_MAG -> GL_NEAREST

Hmmm.. not quite sure where to change it though..