用C++语言实现的各种计算几何算法, 如判断点是否在多边形内, 多边形凸凹性判断, 寻找点集凸包的卷包裹法,求简单多边形的重心,求从多边形外一点出发到该多边形的切线,判断线段是否相交等等! -Using C++ language implementation of a variety of computational geometry algorithms, such as point to determine whether the polygon, the polygon convexity of judge, looking for point set convex hull volume parcels law, the center of gravity for simple polygons, and the starting point from the polygon outside the polygon tangent to determine whether the intersection of line segments and so on!