+
+ Rect TransformToQuadChild(const Rect& src, QuadTreeNodeChildren child_type);
+ Rect TransformFromQuadChild(const Rect& src, QuadTreeNodeChildren child_type);
+ bool IntersectsQuadChild(const Rect& src, QuadTreeNodeChildren child_type);
+ bool ContainedInQuadChild(const Rect& src, QuadTreeNodeChildren child_type);