I have a texture(jpg) and when I map it to a cylinder OpenGL maps it upside down(I do not know why?)!
Now I decided to reverse my Up-Vector instead of rotating my texture which is(I think) computationally expensive.
Here is my code:
gluLookAt(0.0, 0.0, 10.0, 0.0, 0.0, 0.0, 0.0, -1.0, 0.0);
Is it a good idea?