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elchuppa
07-31-2003, 08:52 AM
hi, I have been writing a shader to perform some vector math on scientific data. My inexperience with OpenGL is causing some problems in the texture setup. I want to have a 128 bit per pixel texture with 4 32 bit floating point components. The book I have doesn't have that as an option when setting up the texture, does OpenGL support this kind of texture? Also what kind of pointer should I use to point to this texture? unsigned double double (is that possible)? Any help would be greatly appreciated.

thx.

roffe
07-31-2003, 10:01 AM
ATI and NVIDIA both support 32bit/channel textures(single precision) using their own extensions. Check out the OpenGL registry for exact details on them. For float data, a float pointer is always nice.

elchuppa
07-31-2003, 02:54 PM
thx. yeah, the float pointer makes sense now, I had some weird picture of the array structure packing all 4 channels into one element..doh.