Box2D buoyancy

This is a demonstration of iforce2d's buoyancy physics which I added to my engine. I use Clipper library to find intersection areas between the fixtures, and I made a class which keeps track of all the fixtures inside the water. I added this in July 2014, but never showed it.

You can find the tutorial here.

There are some problems when you throw objects into water with great speed. They can start spinning rapidly or even fly out of the water. This happens when lift is turned on. The problem is probably in force parameters which I haven't tweaked properly.

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