I have a problem that I have no way of solving on my own. I would like to know how to move a 3-dimensional object long the surface of a 3-D sphere and have it move in the direction it is facing, relative to the surface. Can someone please help me? I am not very good at math but am trying. What I know so far is very basic vector math, like sine/cosine, angles between vectors etc. I would really appreciate any help you could give me.