very important: how to make navigation in a 3_d object

i want to make navigation in a 3_d tube that have an M like shape.
By way that is very important for me so please explain it in detail and if you have any samples or code please send it to me.

Hei,have you solved your problem?Try this site
http://www.fatech.com/tech/opengl/glut/

See ‘Moving The Camera’