Hi, I have used a flat 3D texture to store 3D data containing a flow field.
Now I need to find a way to fetch the right values that I’ll need for trilinear interpolation. I have used an simple low res flow field for now to try. It has the following dimensions (xyz) = (32,32,20) and I have put this data in a Flat 3D texture of simensions 160(=325) * 128(324). So for every linear interpolation I need 8 values. The domain is wrap around.
I was wondering how my fetch algorithm should look like and wheter or not I should use a 1D lookup texture.
In GLSL fragment shader,
uniform sampler3D mytexture;
Easy as pie. Be aware that it might better for you to use floating point texture format.
Also, you will need non power of 2 support (NPOT)
Then why don’t you use 3D?
Since I cannot render to 3D texture. And i want to read back the results into a texture to use them in a feedback loop.
Besides that flat 3D textures are more efficient for these kind of operations that 3D textures.
we’re talking GPGPU here
you were almost at the right place with your question on gpgpu.org
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