Hi all! I''m trying to learn GL and quite confused with how transformations are performed in the reverse order, hopefully someone can clear things up Firstly this code: glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(4.0,5.0,6.0); glRotatef(45.0,1.0,2.0,3.0); glTranslatef(-4.0,-5.0,-6.0); in the above code, which translate is performed first? which moves the object back to the origin? the negative translate? However if this is the case ( look the book says) shouldn''t LoadIdentity be called last? How is this possible? Also how does this correspond to the expression C = T(4.0,5.0,6.0)R(45.0,1.0,2.0,3.0)T(-4.0,-5.0,-6.0)? I think there is confusion about the frames whether its the object frame or the world frame... all too confusing. Thanks! Silverbolt

I suggest you read this page:

http://fly.cc.fer.hr/~unreal/theredbook/chapter03.html

Look under "Thinking about Transformations" on this page.

Thanks that was quite helpful!