private void InternalClear(bool retainObstacles)
{
GraphGenerator.Clear();
ClearShortestPaths();
if (retainObstacles)
{
// Remove precalculated visibility, since we're likely revising obstacle positions.
PortManager.ClearVisibility();
}
else
{
PortManager.Clear();
ShapeToObstacleMap.Clear();
EdgeGeometries.Clear();
}
}