Three.js 018Physics

Summary

• Simple physics demo using cannon (npm install --save cannon)
• CANNON.World, CANNON.SAPBroadphase, world.gravity, CANNON.Material, friction, restitution (bounce), addContactMaterial, and world.step in animation loop
• Two controls in dat.GUI can be used to spawn additional boxes and spheres
• New boxes and spheres will fall down and play a hit sound effect upon collision