一个非常实用的C#凸包算法源代码

埃及的牛人写的..Imaginethatyouhaveapieceofwoodandanumberofmetalpinscomeoutfromitrandomly(asintheaboveimage),andyoupickedupanelasticrubberbandandopenitwidewithyourhandtocontainallthemetalpinsandletitgo.Youwillobservethattheelasticrubberbandwillshrinkand