OpenGL Rotation of an object around a line

Question

I am programming in OpenGL and C++. I know 2 points on 1 line (a diagonal line) and wish to rotate an object around that diagonal line. How can I go about doing this? I know

Answer 1

glrotate does the rotation about an axis. One method is to perform transformations which align rotation axis with one of coordinate axis, perform the rotation, then reverse the first step. If you need speed you can combine the operations into a special transformation matrix and apply them in one step. There's a description here.