handleTouchStartDolly method

dynamic handleTouchStartDolly()

Implementation

handleTouchStartDolly() {
  var dx = pointers[0].pageX - pointers[1].pageX;
  var dy = pointers[0].pageY - pointers[1].pageY;

  var distance = Math.sqrt(dx * dx + dy * dy);

  dollyStart.set(0, distance);
}