Piotr Majdak wrote:
Hi!
thanks, your explanation is very clear. I wondered what happens setting the "up" vector to (0,0,1) in your example above. Generally, this should interfere with "target" and "view" vectors. But it doesn't - I think that only the "up" components, which are in the plane normal to the line defined by "view" and "target", are taken into account. The component parallel to the [view,target]-line seems to be ignored (what, of course, makes sense). Do you agree?
yep. for a reference explanation see "man gluFrustum"
mf.g.a IOhannes