Point<num> transformPoint(Point<num> point, [ Point<num> returnPoint ])

Source 

Point<num> transformPoint(math.Point<num> point, [Point<num> returnPoint]) {

  var px = point.x.toDouble();
  var py = point.y.toDouble();

  var td = m03 * px + m13 * py + m33;
  var tx = m00 * px + m10 * py + m30;
  var ty = m01 * px + m11 * py + m31;

  if (returnPoint is Point) {
    returnPoint.setTo(tx / td, ty / td);
    return returnPoint;
  } else {
    return new Point<num>(tx / td, ty / td);
  }
}