THIS IS THE VIEW OF ONE TYPE OF ROY'S GALLERY PICTURES,WHICH I GET IT FROM:- http://users.rsise.anu.edu.au/~roy/gallery/

Actually, this is one of kinematic diagram which has been created by Roy.Kinematics is the mathematical study of the phenomenon of motion.He interested in the motion of rigid-body systems in general, and robots in particular.His work involves quite a lot of 3D graphics, and this is one of the collection of the prettiest pictures he have generated in the course of his work.Most of the things that he createdhas a serious purpose in addition to it's obvious entertainment value.

Above is an example of a robot performing a simple coordinated motion.There are six joints in total, and their motions combine to make the robot's end-effector (blue) spin around a point in space. In this example, kinematics calculations are used to work out the correct motion for each individual joint so that their combined effect produces the desired motion. The technical term for this is inverse kinematics.