So let me try and paint a picture. Say, you have a narrow hallway that only goes left and right, so the restriction in movement only works for Horizontal and Vertical movement, BUT when we reach the end of the hall way there is another hallway leading out, so instead of having the player press up to move forward, we just press 'D' or '->' to make him turn into that hallway, which is done because he is following this "tracer". So in sense the movement Left and Right is working in relation to this tracer.
So think about this image http://img.nobodybuy.com/2010/01/07/sales34776/0x0_p606558/bead-game-bead-maze-toy.jpg and would only be controlled with a left and a right toggle on the keyboard, which in the image uses all 3 dimensions. So pressing '->' will move one of the beads to the right and continue to follow the path until it reaches the end. I have a slight idea on how to make it work, but was wondering if some one could help flesh out this idea. Also, I would need to rotate the player to look more realistic and the camera is attached to the player.
Edited by Cdrandin, 06 January 2013 - 02:50 PM.