OpenGL rotating a camera around a point

Question

In OpenGL I\'m trying to rotate a camera around a point, with camera being distance r from the point and facing the point when it rotates. In other words, I want the camera

Answer 1

it is a little confusing, but i think you should:

// move camera a distance r away from the center
glTranslatef(0, 0, -r);

// rotate 
glRotatef(angley, 0, 1, 0);
glRotatef(anglex, 1, 0, 0);

// move to center of circle    
glTranslatef(-cx, -cy, -cz)

note the order must NOT be changed.