Béizer curve calculations

beizer.js

//point as in [c1, c2]

function simpleDeCasteljau (point, t) {
  return (1-t)*point[0] + t*point[1]
}


function pointInTimeOnBezier(startPoint, endPoint, time) {
  return [
    simpleDeCasteljau([startPoint[0], endPoint[0]], time),
    simpleDeCasteljau([startPoint[1], endPoint[1]], time) ];
}