K-D树源码，不错的空间查找算法，在三维重建和匹配中应用较多！-KD tree source, good space search algorithm, in the three-dimensional reconstruction and matching the application of more!

图形算法合集4：快速线性插值、半色调技术、使用lookup查找表的快速卷积、Nurbs曲面三角化等等。-Graphical Collection 4: rapid linear interpolation, halftoning techniques, the use of look-up table lookup fast convolution, Nurbs surface triangulation and so on.