panCamera method

Implementation

void panCamera() {
  mouseChange.setFrom(_panEnd).sub(_panStart);

  if (mouseChange.length2 != 0) {
    if (scope.object is OrthographicCamera) {
      final scaleX = (scope.object.right - scope.object.left) /
          scope.object.zoom /
          scope.domElement.clientWidth;
      final scaleY = (scope.object.top - scope.object.bottom) /
          scope.object.zoom /
          scope.domElement.clientWidth;

      mouseChange.x *= scaleX;
      mouseChange.y *= scaleY;
    }

    mouseChange.scale(_eye.length * scope.panSpeed);

    pan.setFrom(_eye).cross(scope.object.up).setLength(mouseChange.x);
    pan.add(objectUp.setFrom(scope.object.up).setLength(mouseChange.y));

    scope.object.position.add(pan);
    scope.target.add(pan);

    if (scope.staticMoving) {
      _panStart.setFrom(_panEnd);
    } else {
      _panStart.add(mouseChange
          .sub2(_panEnd, _panStart)
          .scale(scope.dynamicDampingFactor));
    }
  }
}