A fixed time-step with variable rendering using interpolation from the sprites previous position plus its current velocity to calculate its final render position.
Resources: http://gafferongames.com/game-physics/fix-your-timestep/ http://gameprogrammingpatterns.com/game-loop.html http://www.html5gamedevs.com/topic/8716-game-loop-fixed-timestep-variable-rendering/
Forked from Anthony Del Ciotto's Pen JS Game Loop: Fixed time-step, variable rendering.