Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.
坚持精准方略，优势互补，“全国一盘棋”凝聚合力。
。业内人士推荐同城约会作为进阶阅读
Mahjong, Sudoku, free crossword, and more: Play games on Mashable，推荐阅读搜狗输入法下载获取更多信息
Visit the North Sea oil field used to store greenhouse gas。业内人士推荐同城约会作为进阶阅读
В Финляндии предупредили об опасном шаге ЕС против России09:28