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CG, problem binding parameter to register

Started by codehunter13 Oct 18, 2005 at 4:08 PM 0 replies 550+ views

Original Post

Oct 18, 2005 at 4:08 PM

hi, i'm new to cg and when i use the function cgGetParameterResourceIndex it always returns 0. here's some code


CGparameter worldViewProjMatrix = cgGetNamedParameter(*getVertexShaderProg(), "WorldViewProjMatrix");
CGparameter texMat1 = cgGetNamedParameter(*getVertexShaderProg(), "TexMatrix1");
DWORD wvpMatrixReg = cgGetParameterResourceIndex(worldViewProjMatrix);
DWORD texMatrix1 = cgGetParameterResourceIndex(texMat1);

i've set the callback error handler functions and this doesn't give an error. Can someone help me? thx in advance [Edited by - codehunter13 on October 18, 2005 5:06:10 PM]

Jimfing

Oct 19, 2005 at 7:30 AM

Is the parameter actually been used in the shader (towards calculating the output). The compiler is very good at removing code that doesn't get used in the end. So if a parameter isn't used, it won't appear in the compiled object code.

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