Free Walkthrough Application Code
 

I've posted an new article on VizWorkshop.com.

Walkthrough Application Example

Summary:
This application allows the user to fly around a large 3D scene. The user controls movement via the mouse or a mouse and keyboard combination. The program uses the physics system to implement collision detection, so the view cannot move through walls.

Full article and code:
http://vizworkshop.com/articles/walkthrough_app.htm