protected override void CalculateDragValues()
{
Camera focusCamera = RTFocusCamera.Get.TargetCamera;
_relativeDragOffset = Vector3.zero;
if (_destinationObjects.Count != 0 && _settings.CanSnapToObjectVerts)
{
Vector3 worldDestPos;
if (GetWorldPointClosestToInputDevice(focusCamera, _destinationObjects, out worldDestPos))
{
_relativeDragOffset = worldDestPos - _snapPivot;
}
}
else
if (_settings.CanSnapToGrid)
{
Ray ray = RTInputDevice.Get.Device.GetRay(focusCamera);
XZGridRayHit gridHit = RTScene.Get.RaycastSceneGridIfVisible(ray);
if (gridHit != null)
{
XZGridCell gridCell = RTSceneGrid.Get.CellFromWorldPoint(gridHit.HitPoint);
List <Vector3> centersAndCorners = gridCell.GetCenterAndCorners();
int closestPtIndex = Vector3Ex.GetPointClosestToPoint(centersAndCorners, gridHit.HitPoint);
if (closestPtIndex >= 0)
{
_relativeDragOffset = centersAndCorners[closestPtIndex] - _snapPivot;
}
}
}
_snapPivot += _relativeDragOffset;
_totalDragOffset += _relativeDragOffset;
}