铁雪资源网 Design By www.gsvan.com

自己做了碰撞检测的封装,先看下实例demo,在看封装

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title>碰撞检测</title>
 <style type="text/css">
  *{
  margin: 0;
  padding: 0;
  }
  #divA,#divB{
  width: 200px;
  height: 200px;
  background-color: purple;
  font-size: 50px;
  line-height: 200px;
  text-align: center;
  position: absolute;
  color: #fff;
  }
  #divA{
  left: 30px;
  top: 30px;
  z-index: 5;
  }
  #divB{
  left: 300px;
  top: 300px;
  }
 </style>
 </head>
 <body>
 <div id="divA">A</div>
 <div id="divB">B</div>
 </body>
 <script type="text/javascript">
 var divA = document.getElementById("divA");
 var divB = document.getElementById("divB");
 
 
 divA.onmousedown = function (e) {
  
  var event1 = window.event || e;
  
  
  var startX = event1.clientX;
  
  var startY = event1.clientY;
  
  document.onmousemove = function (j) {
  
  var event2 = window.event || j;
  
  var endX = event2.clientX;
  var endY = event2.clientY;
  
  divA.style.left = divA.offsetLeft + (endX - startX) + "px";
  divA.style.top = divA.offsetTop + (endY - startY) + "px";
  
  startX = endX;
  startY = endY;
  
  if (isCrash(divA,divB) == true) {
   
   divA.style.backgroundColor = "red";
  } else{
   
   divA.style.backgroundColor = "purple";
  };
  }
 }
 
 
 divA.onmouseup = function () {
  
  document.onmousemove = null;
 }
 
 
 function isCrash (obj1,obj2) {
  
  var boolCrash = true;
  
  var left1 = obj1.offsetLeft;
  
  var right1 = obj1.offsetLeft + obj1.offsetWidth;
  
  var top1 = obj1.offsetTop;
  
  var bottom1 = obj1.offsetTop + obj1.offsetHeight;
  
  var left2 = obj2.offsetLeft;
  
  var right2 = obj2.offsetLeft + obj2.offsetWidth;
  
  var top2 = obj2.offsetTop;
  
  var bottom2 = obj2.offsetTop + obj2.offsetHeight;
  
  
  if (right1 > left2 && left1 < right2 && bottom1 > top2 && top1 < bottom2) {
  boolCrash = true;
  } else{
  boolCrash = false;
  }
  return boolCrash;
 }
 
 </script>
</html>

函数封装

 function isCrash (obj1,obj2) {
  
  var boolCrash = true;//假设true为碰撞
  
  var left1 = obj1.offsetLeft;
  
  var right1 = obj1.offsetLeft + obj1.offsetWidth;
  
  var top1 = obj1.offsetTop;
  
  var bottom1 = obj1.offsetTop + obj1.offsetHeight;
 
  var left2 = obj2.offsetLeft;
  
  var right2 = obj2.offsetLeft + obj2.offsetWidth;
  
  var top2 = obj2.offsetTop;
  
  var bottom2 = obj2.offsetTop + obj2.offsetHeight;
  
  
  if (right1 > left2 && left1 < right2 && bottom1 > top2 && top1 < bottom2) {
  boolCrash = true;
  } else{
  boolCrash = false;
  }
  return boolCrash;
 }

标签:
js碰撞检测算法,js碰撞检测,js碰撞检测原理

铁雪资源网 Design By www.gsvan.com
广告合作:本站广告合作请联系QQ:858582 申请时备注:广告合作(否则不回)
免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件! 如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
铁雪资源网 Design By www.gsvan.com

评论“js实现碰撞检测特效代码分享”

暂无js实现碰撞检测特效代码分享的评论...

稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!

昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。

这里面让他访问的是一个国服的战网网址,com.cn和后面的zh都非常明白地表明这就是国服战网。

而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?