Hi, I''ve been reading in the redbook for a while, and I came across this ''formula''; It says when you call glRotate(), the current matrix (M) is multiplied by the rotation matrix (R); Out of this sentence I would conclude that M = M*R; but then they give a formula : " M o R". Now, if I remember this well the ''o'' means ''comes after'' Out of this formula I would conclude that M = R*M So what is the right one. I''ve looked in all my math schoolbooks and I haven''t found it to be used with matrices (also because you don''t know wether it means addition or multiplication (just guessing here)) So if anybody knows what it means...? Tnx in advance -The Rock- BAD software http://members.spree.com/entertainment/bad_software