Misc demos from past hacknights

change-color-on-click.html Simple A-Frame demo - cube changes color when you click on it.
postitnotes/persistentworld.html Persistent world demo - contains post-it notes and other random objects that are persisted in a Google Firebase database.
postitnotes/persistentworld-with-gui.html Same as above but with some aframe-gui components added.
pipv/index.html Instancing demo - uses THREE.InstancedBufferGeometry and THREE.DataTexture to implement instancing while maintaining per-instance per-vertex state.
TODO: add more links here

Copied from aframe-physics-system for hacknight experiments:

aps/constraints-ammo.html Demo of five different kinds of constraint, using ammo.js.
TODO: add more links here