I am new with opengl, and have tried to learn it with help of some sample code and tutorials. The problem is, that I don't know how to move the 'camera' around. I have found many samples of how to rotate objects, but not about how to move the camera. It would be nice to move the camera up, down, left and right with arrow keys or mouse. How this is done? I would be very glad, if someone could help me.