It is a WebGL demo using Leap Motion and signed distance field to simulate the physics.
The technique behind this demo is very simple. It uses signed distance field to do the collision test on the hand. Basically the whole hand is constructed by the primitive - spheres, cylinders and a hexagonal Prism. You can find all of the distance field functions here by Íñgo Quílez.
This demo uses the WebGL framework - ThreeJS and post-processing helper tool - Wagner forked by Superguigui originally by thespite
The prototype folder boilerplate was cloned from codevember by Mattdesl