guys, i’m having a whale of a time getting acceleration with texture fetches in my vertex shaders
to be clear, it works, but it’s not accelerated.
i’ve got:
nearest filtering
clamp wrap
tried these formats:
GL_LUMINANCE_FLOAT32_ATI
GL_RGBA_FLOAT32_ATI
GL_RGBA32F_ARB
GL_LUMINANCE32F_ARB
using texture2DLod(s, xy, 0.0) for sampling.
it seem some folks have had success with fiddling with the texture format, but try as i might i can’t get it to budge.
the opengl vertex texturing demo from nvidia works nicely, but uses nv_vertex_program3.
3dlabs validate says all is ok. infologs are clean. no opengl errors either
p.s. it strikes me as incredibly freaky to need a 3rd party tool to tell me what my own compiler should
system:
geforce 6800 gs
forceware 82.12 and 83.90 (beta, no official drivers exist for this board, yet)
glsl 1.10 via cg 1.3 compiler
windows xp sp2