I realized I had not released this, and we cant let Quartz Composer users have all the fun *cough*.
This is a Rutt Etra emulator that is pretty decently fast, and was the basis for a Quartz Composer Plugin that I released. It uses vertex attributes with jit.gl.mesh to generate offsets on the GPU. The included shader demonstrates how to use vertex attributes to displace geometry, and the included patch demonstrates how to upload vertex attributes as a matrix to jit.gl.mesh
Maybe some folks will enjoy? Have fun :)