I really did not understand your question but may be this will help you :roll:
Andy posted this url in some other place
http://ac3d.org/ac3d/download/AC3Dloader1.1.zip
This is the loader for loading the ac3d files this is a simple
opengl program in which you can specify the camera position
by changing the parameters to the function gluLookAt( ); 8)
Coming to how we do this in AC3d as it is .. you can just use right click to zoom
and middle click to bring the object to center of the view. and left click to rotate around
well im' just trying to say something but hope it helps