实现散乱点云的K邻域搜索，对于从事逆向工程方向研究有较大的帮助-Of scattered point cloud the K neighborhood search, larger studies engaged in reverse engineering direction

自制拼图小游戏，可选择图片，双缓冲绘图，可调节难度，利用逆向预先排序，保证游戏有正确解法-Homemade puzzle game, you can choose the picture, double-buffered graphics, adjustable difficulty, using reverse pre-sorted to ensure that the game has the right solution