最近需要用到矩形相交算法的简单应用,所以特地拿一个很简单的算法出来供新手参考,为什么说是给新手的参考呢因为这个算法效率并不是很高,但是这个算法只有简简单单的三行.程序使用了两种方法来判断是否重叠/相交,如果有兴趣可以看一下,如果觉得有bug可以留言.代码仅供参考. C#中矩形的方法为Rectangl(起始点坐标, 矩形的大小)或Rectangl(起始点x坐标, 起始点y坐标, 矩形宽, 矩形高),起始点为矩形区域的左上角. 方法一 姑且叫做“井字法”吧,延长其中一个矩形的四边使其形成一“井”字(…

Intersection Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 16322   Accepted: 4213 Description You are to write a program that has to decide whether a given line segment intersects a given rectangle. An example: line: start point: (4,9)…

题目链接 Intersection Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 12040   Accepted: 3125 Description You are to write a program that has to decide whether a given line segment intersects a given rectangle. An example: line: start point:…

题目链接: G - Intersecting Rectangles Kattis - intersectingrectangles 题目大意:给你n个矩形,每一个矩形给你这个矩形的左下角的坐标和右上角的坐标,然后问你这些矩形会不会相交,如果存在相交的点,输出1,否则输出0. 具体思路:扫描线,我们首先对x进行排序,然后判断当前x直线对应的线段上是否有x已经覆盖,如果已经有就证明存在相交的情况.但是这样会存在多算的情况,所以我们对于每一个矩形的左端点打一个标记,然后右端点再打一个标记,当左端点的时…

矩形相交 包含 问题.参考 假定矩形是用一对点表达的(minx, miny) (maxx, maxy),那么两个矩形    rect1{(minx1, miny1)(maxx1, maxy1)}    rect2{(minx2, miny2)(maxx2, maxy2)}  相交的结果一定是个矩形,构成这个相交矩形rect{(minx, miny) (maxx, maxy)}的点对坐标是:      minx   =   max(minx1,   minx2)      miny   =   m…

Description Given a rectangle and a circle in the coordinate system(two edges of the rectangle are parallel with the X-axis, and the other two are parallel with the Y-axis), you have to tell if their borders intersect. Note: we call them intersect ev…

You can Solve a Geometry Problem too Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6837 Accepted Submission(s): 3303 Problem Description Many geometry(几何)problems were designed in the ACM/ICPC. A…

Jack Straws Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 2911   Accepted: 1322 Description In the game of Jack Straws, a number of plastic or wooden "straws" are dumped on the table and players try to remove them one-by-one witho…

题目链接:https://vjudge.net/problem/POJ-1410 题意:判断线段和矩形是否相交. 思路:注意这里的相交包括线段在矩形内,因此先判断线段与矩形的边是否相交,再判断线段的两端点是否在矩形内(因为是矩形,即凸多边形,直接用叉积判断即可,如果是一般的多边形,需要用射线法判断.) AC code: #include<cstdio> #include<algorithm> #include<cmath> #include<cstdlib>…

Pick-up sticks Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1872    Accepted Submission(s): 706 Problem Description Stan has n sticks of various length. He throws them one at a time on the fl…