private void onModified()
{
if (_accessory == null && _railRoad == null && _road == null)
{
remove();
}
// update surrounding voxels if necessary
if (_railRoad != null)
{
_railRoad.invalidateVoxel();
}
if (_road != null)
{
_road.invalidateVoxel();
}
// create/remove crossing.
bool b = shouldHaveCrossing();
if (b && _accessory == null)
{
accessory = new RRCrossing(this);
return;
}
if (!b && _accessory is RRCrossing)
{
accessory = null;
return;
}
}
