//---------------------------------------------------------------------
public void addNode(QuadNode <A> node)
{
mNodes.Add(node);
}
//---------------------------------------------------------------------
public void removeNode(QuadNode <A> node)
{
mNodes.Remove(node);
}
//---------------------------------------------------------------------
public void create(int depth, A area, QuadNodeObjectFactory <A> node_object_factory)
{
mMaxDepth = depth;
mRootNode = new QuadNode <A>();
mRootNode.create(0, this, area, node_object_factory);
}