Feature: add an integrated `usePhysics` addon

[sc0ttj]

Use cases:

• games
• physics simulations
• any complex interactives in general (lots of interaction)

Features:

• an integrated animation function which saves the latest state at fixed time intervals, with update methods that change the animation while it’s running
• should use onLoop for integrated (blended between frames/states), fixed interval updates
• should play nice with setState/render process, and any Gamepad addons, etc
• support canvas or DOM

See:

• https://github.com/blakerego/Angular-Physics (based on soulwire/CoffeeePhysics)
• popmotion Physics

Nice to haves:

• velocity, acceleration, friction, springs, fluid, bouyancy, gravity, bounciness
• collision detection: broad phase and narrow phase

[sc0ttj]

https://jsfiddle.net/21q6Lgyx/5/

^ nice fiddle showing throttled FPS, demonstrate using window.performance.now() instead of Date.now()

https://jsfiddle.net/chicagogrooves/nRpVD/2/

^ another nice one with adding controls to dynamically adjust target framerate, sampling framerate on a separate interval from the animation, and adding a graph of historical framerates

both based on this stack overflow answer

https://stackoverflow.com/a/19772220