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Error in Open GL Game Programming?!

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If someone here owns this book or if perhaps the authors have a look in this board, too, I wanted to ask if there isn''t an error in the matrix multiplication on page 82 (it''s about perspective projection). The result vector isn''t what you get with this multiplication, you would have to multiply the vector from the other side to get it. Hope it''s ok if I ask this here.

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