On Tuesday, November 30, 2004, at 07:55PM, Ben Blundell <email@hidden> wrote:
Hiya All. Im working on moving an intensive algorithm to work on the GPU.
I need to blend several polygons with floating point textures additively.
Ideally if 2 polygons were covered in a texture with 0.5f as the colour,
the resulting polygon would be 1.0f. Fairly simple i figured. However, i
need to modify these values using Cg or some shader language. So far it
"appears" that the Cg bit is doing its job. However, the results are not
quite what i'd expected. I just wondered, is it possible to do floating
point additive blending on the PBuffer using the Radeon 9700 inside a
powerbook G4?
No.
Nothing short of a GeForce 6800 can do blending of floating point fragments.
A 9700 Mobility (as you have) certainly can't.
--
James Milne
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