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pjcozzi
01-07-2011, 06:46 AM
Hi,

When glGetTransformFeedbackVarying returns information about gl_Position, I get different values for its size on ATI and NVIDIA. On ATI, the size is 4; on NVIDIA, it is 1. In both cases, the type returned is GL_FLOAT_VEC4. According to the SDK (http://www.opengl.org/sdk/docs/man3/xhtml/glGetTransformFeedbackVarying.xml), the size is in units of the type returned in type.

Regards,
Patrick

Groovounet
01-07-2011, 07:21 AM
This issue also affect custom variables.