On Thu, 2004-08-26 at 12:26, Andreas Zieringer wrote:
>
> Hi,
>
> I wrote a extra ParameterChunk for GLSL with my test scene (500 cubes) I
> got a nice speed improvement.
>
> 500 SHLChunks : 32 fps
> 1 SHLChunk and 500 ParameterChunks : 71 fps
> 1 SHLChunk : 85 fps
What Andreas is trying to tell you here (without saying it), is that now
might be a good time to think about switching to GLSL. ;)
In general I prefer GLSL over CG. For political reasons, but also
because it's better supported on multiple platforms (like ATI) than CG.
Yes, you can get to ARB_vp and ARB_fp from CG, but at that level you
need very different programs to get good performance for nVidia and ATI.
Give the high-level description to the compiler, and it will do the
optimization in the best way for the chip in question.
Just my .02$
Dirk
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