handleTouchStartRotate method

void handleTouchStartRotate()

Implementation

void handleTouchStartRotate() {
  if (pointers.length == 1) {
    rotateStart.setValues(pointers[0].pageX, pointers[0].pageY);
  } else {
    final x = 0.5 * (pointers[0].pageX + pointers[1].pageX);
    final y = 0.5 * (pointers[0].pageY + pointers[1].pageY);

    rotateStart.setValues(x, y);
  }
}