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OpenGL sampler1D not working in CG

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Hi, I'm writing openGL-CG program. I want to use sampler1D in my shader program and I enable it like this:
       fresnelMapHandle = cgGetNamedParameter(shaderFP_water, "fresnelMap");
       cgGLSetTextureParameter(fresnelMapHandle, fresnelMapTex);
In fragment program I declare:
       uniform sampler1D fresnelMap
...and sample it with:
       float w = tex1D( fresnelMap, coord ).x;
But this doesn't work. The geometry that I apply shader to gets messed up. Is there something wrong with this code above? In code above, in openGL I treat 1D texture same as 2D. Maybe it should be treated differently? P.S. Another weird thing is this works on ATI card(even pretty old one) but not on (new) nvidia. [Edited by - butthead_82 on September 13, 2009 6:36:32 AM]

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