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Physics

My demo uses the amazing (and opensource) BOX2D physics engine for C++. You can check it out at:

http://box2d.org/

The gameplay involves a lot of discontinuity in the physics due to all the teleportation (character teleporting into objects, objects that teleport into spaces that dont fit them...), and BOX2D handled the resolution of these unstable states very well. In fact very little extra programming was required for the engine to reach a very stable steady state. 


What the BOX2D test bed looks like. 
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