/// <summary>
/// Sets a matrix parameter on a special semantic in a Cg program</summary>
/// <param name="parameter">Name of parameter that we want to set</param>
/// <param name="semantic">The semantic that is needed to set a parameter in a special way</param>
/// <returns>True if parameter set successfully</returns>
public static bool SetMatrixParameter(string parameter, string semantic)
{
IntPtr param;
int matrix = 0;
int tranform = 0;
try
{
m_cg_parameters.TryGetValue(parameter, out param);
if (semantic == "WORLDVIEWPROJECTION")
{
matrix = CgGl.CG_GL_MODELVIEW_PROJECTION_MATRIX;
tranform = CgGl.CG_GL_MATRIX_IDENTITY;
}
CgGl.cgGLSetStateMatrixParameter(param, matrix, tranform);
return(true);
}
catch { }
return(false);
}
private void SetShaderParametersPass2(Vector3f eyeVect)
{
CgGl.cgGLSetParameter3f(m_CGparam_eyePositionPass2, ViewerPosition.x, ViewerPosition.y, ViewerPosition.z);
checkForCgError("setting eyePos2");
// Track the combined model-view-projection matrix
CgGl.cgGLSetStateMatrixParameter(m_CGparam_modelViewProjPass2,
CgGl.CG_GL_MODELVIEW_PROJECTION_MATRIX,
CgGl.CG_GL_MATRIX_IDENTITY);
checkForCgError("setting model view projection matrix parameter2");
//set modelViewIT matrix
CgGl.cgGLSetStateMatrixParameter(m_CGparam_modelViewITPass2,
CgGl.CG_GL_MODELVIEW_MATRIX,
CgGl.CG_GL_MATRIX_INVERSE_TRANSPOSE);
checkForCgError("setting model view IT matrix parameter2");
CgGl.cgGLSetStateMatrixParameter(m_CGparam_modelViewPass2,
CgGl.CG_GL_MODELVIEW_MATRIX,
CgGl.CG_GL_MATRIX_IDENTITY);
checkForCgError("setting model view matrix parameter2");
}