> is there a way to scale texture coordinates (for texture lookups
> inside a shader) to some range other than 0.0 to 1.0. Say from -100 to
> 100? Couldn't find this on the books I have.
Several options, from generally cheapest:
1) Just pass them not in 0..1 range, but in -100..100 range. Texture
coordinate can be pretty much any number, nowhere it is required to
use 0..1 range.
2) Use texture matrix to scale them (if you're using fixed function
vertex processing), or scale them how you like in vertex shader /
vertex program.
3) Scale them before doing texture lookup in the fragment shader /
fragment program.
--
Aras Pranckevicius
work: http://unity3d.com
home: http://aras-p.info
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