rotation in OpenGL?

[himageofxidian]

Hi guys:
In OpenGL, I can rotate using the function glRotate(angle,x,y,z),
but the vector or line (x,y,z) is from the origin. How can i rotate around
arbitrary axis(or line, e,g some line parallels x axis).

himageofxidian

[wien]

First translate to the position you shoud rotate around, and then rotate:
glTranslatef(-3.0f, 0.0f, 0.0f);
glRotate(45.0f, 1.0f, 0.0f, 0.0f);

[himageofxidian]

Thank you Wien, but if I don't translate the coordinates ,How can I do this :confused: :confused:

[wien]

That's the whole point.. You can't. To rotate around anything else than [0,0,0], you need to translate first.