给定点群凸壳生成算法,GIS的核心算法之一。-Generate the core algorithm of the algorithm, GIS is one of the convex hull of a given point group

Graham算法，对形成不规则三角网的最小凸包点进行寻找，并形成最小凸闭包-Graham algorithm, the minimum convex hull point to form a triangular irregular network was looking to form a minimum convex closure

qt下实现自定义凸包生成算法，具有较高运行速度-Under qt implement custom convex hull generation algorithm, with high speed