摘要: poj1408——叉积求多边形面积FishnetTime Limit:1000MSMemory Limit:10000KTotal Submissions:1853Accepted:1185DescriptionA fisherman named Etadokah awoke in a very s... 阅读全文
posted @ 2015-04-02 22:44 __560 阅读(211) 评论(0) 推荐(0) 编辑
摘要: 重载Point其中减法表示向量,乘法表示叉积struct Point{ double x,y; friend double operator*(const Point A,const Point B) { return A.x*B.y-A.y*B.x; } ... 阅读全文
posted @ 2015-04-02 18:25 __560 阅读(198) 评论(0) 推荐(0) 编辑
摘要: 求直线与线段的交点求交点定比分点法,用叉积求面积,用面积比代替线段长度比Point inter_point(Point A,Point B,Point C,Point D)///返回直线AB和线段CD的交点{ if(!intersect(A,B,C,D)) return {-INF*1.0,0... 阅读全文
posted @ 2015-04-02 18:23 __560 阅读(223) 评论(0) 推荐(0) 编辑
摘要: poj1039——计算几何 求直线与线段交点,判断两条直线是否相交PipeTime Limit:1000MSMemory Limit:10000KTotal Submissions:9439Accepted:2854DescriptionThe GX Light Pipeline Company s... 阅读全文
posted @ 2015-04-02 18:05 __560 阅读(792) 评论(0) 推荐(0) 编辑