Animation Rig
WebGL is meaningless without using animations rig. animation rig is a way to move the camera around scene.
Who hate to sit and watch a website while it is representing itself like a great movie? You See ? here we are dealing with a new generation of websites!
Basically animation rig is a way to create an interactive or none interactive view point for website.
For understand the purpose go and see the PNA project in the my portfolio page using THIS LINK