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);
}