Chipmunk Physics

I want to use auto-geometry as stand-alone code, but can't find any samples how to use it from c++. Any links or samples available here?

The simplest Autogeometry example we have is the C command line utility at the bottom of the documentation page here:
http://chipmunk-physics.net/documentation.php

It uses ImageIO on OS X to load a .png file, but that could easily be swapped out for anything else. Nothing else about it is platform specific. That should give you a pretty good starting point.