In this tutorial you will see how to rig a point in any place in the space (have coordinates x,y,z). This is the last tutorial for a theory point of view. Other ones would be make an practical example.
Sorry for the mistakes during the tutorial. Please download the tree videos and play them in a queue. You will laugh with the errors I have made on it. ;-)
This is the resulting video. The magenta ball is the one what have a fully coordinate values (x,y,z).