+ inline const QuadTree& GetQuadTree() { if (m_quadtree.root_id == QUADTREE_EMPTY) { GenBaseQuadtree(); } return m_quadtree; }
+ QuadTreeIndex GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type);
+ QuadTreeIndex GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren mytype);