Hello, I would like to know if you have an example where you can move the camera whit the mouse(zoom in, zoom out, move to the right and left, up and down). This is for a robot I made, but I want to change the camera perspectives with the mouse. I also wold like to know how to rotate an arm of my robot with respect to the shoulder, because I use the function "glRotatef();" but the arm rotate with respect to the center of the camera I guess. Thanks for your attention Best regards Christian Encinas García.