hello again - this time it''s not a problem - it''s a questioin of understanding. why does the gluProject functions a ''winz'' value ??? as far as I know monitors don''t have a Z coordinate

The projected Z coordinate is written to the depth buffer for use in depth testing.

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Original post by ZGL_Sigma
as far as I know monitors don''t have a Z coordinate

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WRONG !
When your very argry/mad at a bug, smach your head in your monitor -- you''ll see the 3rd dimention (and you''ll fell it too) :D

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Yoshy - From The Bobs