onPointerDown method

void onPointerDown(
  1. dynamic event
)

Implementation

void onPointerDown( event ) {
  if (enabled == false || event.button != options.button || event.pointerType == 'touch_pad') return;
  updatePointer(event);
  camera.add(
    selectionBox
      ..scale.setFrom(Vector3.zero())
      ..position.z = cameraDist
      ..position.x = _pointer.x
      ..position.y = _pointer.y
  );
  _isDown = true;

  _startPoint.setFrom(selectionBox.position);
  _startPoint.z = 0;
  _endPoint.setFrom(Vector3.zero());
}