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CHECKGL ( glMatrixMode (GL_MODELVIEW) );
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CHECKGL ( glLoadIdentity() );
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CHECKGL ( glMatrixMode (GL_PROJECTION) );
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CHECKGL ( glLoadIdentity() );
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int VertexLocation = VTXATTRIB_POSITION;
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CHECKGL ( glProgramLocalParameter4fARB (GL_FRAGMENT_PROGRAM_ARB, 0, x + _ScreenOffsetX, WindowHeight - y - height - _ScreenOffsetY, z, 0.0f) );
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CHECKGL ( glProgramLocalParameter4fARB (GL_FRAGMENT_PROGRAM_ARB, 1, width, height, 0.0f, 0.0f) );