<?php $s = is_rect_intersect(1,2,1,2,4,5,0,3); var_dump($s); /* 如果两个矩形相交,那么矩形A B的中心点和矩形的边长是有一定关系的. Case 2345中,两个中心点间的距离肯定小于AB边长和的一半. Case 1中就像等了. 设A[x01,y01,x02,y02]  B[x11,y11,x12,y12]. 矩形A和矩形B物理中心点X方向的距离为Lx:abs( (x01+x02)/2 – (x11+x12) /2) 矩形A和矩形B物…

源代码 public bool JudgeRectangleIntersect(double RecAleftX, double RecAleftY, double RecArightX, double RecArightY, double RecBleftX, double RecBleftY, double RecBrightX, double RecBrightY) { bool isIntersect = false; try { double zx = getAbsluteValue(…

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…

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>…

SQL中常常要判断两个时间段是否相交,该如何判断呢?比如两个时间段(S1,E1)和(S2,E2).我最先想到的是下面的方法一.方法一:(S1 BETWEEN S2 AND E2) OR (S2 BETWEEN S1 AND E1).很好理解:一个时间段的开始时间S1在另一个时间中间(S2,E2),或者开始时间S2在另一个时间中间(S1,E1),这个方法比较繁琐 方法二:本方法先考虑这两段时间什么情况下不相交,如图:    -----+-----------------+-------------…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=1221 Rectangle and Circle Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3434    Accepted Submission(s): 904 Problem Description Given a rectangle…

C. White Sheet There is a white sheet of paper lying on a rectangle table. The sheet is a rectangle with its sides parallel to the sides of the table. If you will take a look from above and assume that the bottom left corner of the table has coordina…

直接上代码,过程不复杂 /// <summary> /// 判断两条线是否相交 /// </summary> /// <param name="a">线段1起点坐标</param> /// <param name="b">线段1终点坐标</param> /// <param name="c">线段2起点坐标</param> /// <param…

bool GraphicsUtil::linesCross(b2Vec2 v0, b2Vec2 v1, b2Vec2 t0, b2Vec2 t1, b2Vec2 &intersectionPoint) { if ( areVecsEqual(v1,t0) || areVecsEqual(v0,t0) || areVecsEqual(v1,t1) || areVecsEqual(v0,t1) ) return false; b2Vec2 vnormal = v1 - v0; vnormal = b…

Given two rectangles, find if the given two rectangles overlap or not. A rectangle is denoted by providing the x and y co-ordinates of two points: the left top corner and the right bottom corner of the rectangle. Note that two rectangles sharing a si…

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(…

title author date CreateTime categories win10 uwp 求两个矩形相连的几何 lindexi 2018-12-24 20:51:49 +0800 2018-12-17 08:55:34 +0800 Win10 UWP 在写笔迹的过程,我需要做橡皮的功能,橡皮是一个矩形在移动,因为移动的过程是不连续的,需要将多个矩形组合为连续的几何 大概的做法就是连接两个矩形作为一个六边形或者一个大的矩形的方法,这个方法最简单是求闭包的方法 本文采用的坐标是左上角是 (…

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…

You can Solve a Geometry Problem too Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 199    Accepted Submission(s): 132   Problem Description Many geometry(几何)problems were designed in the ACM/…

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…

You can Solve a Geometry Problem too Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6425    Accepted Submission(s): 3099 Problem Description Many geometry(几何)problems were designed in the ACM/I…

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…

给定一个单链表,只给出头指针h: 1.如何判断是否存在环? 2.如何知道环的长度? 3.如何找出环的连接点在哪里? 4.带环链表的长度是多少? 解法: 1.对于问题1,使用追赶的方法,设定两个指针slow.fast,从头指针开始,每次分别前进1步.2步.如存在环,则两者相遇:如不存在环,fast遇到NULL退出. 2.对于问题2,记录下问题1的碰撞点p,slow.fast从该点开始,再次碰撞所走过的操作数就是环的长度s. 3.问题3:有定理:碰撞点p到连接点的距离=头指针到连接点的距离,因此,分…

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:…

Jack Straws 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 without disturbing the other straws. Here, we are only concerned with if various pairs of straws are…