欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

js实现div色块碰撞

程序员文章站 2022-06-22 14:08:28
本文实例为大家分享了js实现div色块碰撞的具体代码,供大家参考,具体内容如下 描述: 生成两个div色块,一个可以拖动,一个不可以,用拖动的去撞击不能动的,会将这个色块随机撞到一...

本文实例为大家分享了js实现div色块碰撞的具体代码,供大家参考,具体内容如下

描述:

生成两个div色块,一个可以拖动,一个不可以,用拖动的去撞击不能动的,会将这个色块随机撞到一个位置,改变颜色。

效果:

js实现div色块碰撞

js实现div色块碰撞

实现:

js文件:

function dragobj(_obj) {
 this.obj=_obj;
 this.point={};
 this.movebool=false;
 this.obj.self=this;
 this.obj.addeventlistener("mousedown",this.mousehandler);
 this.obj.addeventlistener("mouseup",this.mousehandler);
 this.obj.addeventlistener("mousemove",this.mousehandler);
 this.obj.addeventlistener("mouseleave",this.mousehandler);
}
dragobj.prototype={
 mousehandler:function (e) {
  if(!e){
   e=window.event;
  }
  if(e.type=="mousedown"){
   this.self.movebool=true;
   this.self.point.x=e.offsetx;
   this.self.point.y=e.offsety;
  }else if(e.type=="mousemove"){
   if(!this.self.movebool) return;
   this.self.obj.style.left=(e.clientx-this.self.point.x)+"px"
   this.self.obj.style.top=(e.clienty-this.self.point.y)+"px"
  }else if(e.type=="mouseup" || e.type=="mouseleave"){
   this.self.movebool=false;
  }
 },
 removeevent:function () {
 
  this.obj.removeeventlistener("mousedown",this.mousehandler);
  this.obj.removeeventlistener("mouseup",this.mousehandler);
  this.obj.removeeventlistener("mousemove",this.mousehandler);
  this.obj.removeeventlistener("mouseleave",this.mousehandler);
 
  this.obj=null;
  this.point=null;
 }
};
var hittest=hittest || (function () {
 return {
  to:function (display0,display1) {
   var rect=display0.getboundingclientrect();
   var rect1=display1.getboundingclientrect();
   if(rect.left>=rect1.left && 
rect.left<=rect1.left+rect1.width
 && rect.top>=rect1.top && rect.top<=rect1.top+rect1.height){
    return true;
   }
   if(rect.left+rect.width>=rect1.left && rect.left+rect.width<=rect1.left+rect1.width && rect.top>=rect1.top
 && rect.top<=rect1.top+rect1.height){
    return true;
   }
   if(rect.left>=rect1.left && 
rect.left<=rect1.left+rect1.width 
&& rect.top+rect.height>=rect1.top && 
rect.top+rect.height<=rect1.top+rect1.height){
    return true;
   }
   if(rect.left+rect.width>=rect1.left && rect.left+rect.width<=rect1.left+rect1.width && 
rect.top+rect.height>=rect1.top 
&& rect.top+rect.height<=rect1.top+rect1.height){
    return true;
   }
  }
 }
})();
var loadimg=loadimg || (function () {
 return {
  load:function (listsrc,callback) {
   this.callback=callback;
   this.listsrc=listsrc;
   this.num=0;
   this.imgarr=[];
   var img=new image();
   img.addeventlistener("load",this.loadhandler.bind(this));
   img.src=listsrc[0];
  },
  loadhandler:function (e) {
   if(!e){
    e=window.event;
   }
   e.currenttarget.removeeventlistener
("load",this.loadhandler.bind(this));
   this.imgarr[this.num]=e.currenttarget;
   if(this.num==this.listsrc.length-1){
    this.callback(this.imgarr)
    return;
   }
   var img=new image();
   this.num++;
   img.addeventlistener("load",this.loadhandler.bind(this));
   img.src=this.listsrc[this.num];
  }
 }
})();

html:

<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <title>title</title>
 <style>
  div{
   width: 200px;
   height: 200px;
   position: absolute;
  }
 </style>
 <script src="js/dragobj.js"></script>
</head>
<body>
<div id="div0"></div>
<div id="div1"></div>
<script>
 window.addeventlistener("mousedown",mousedownhandler);//生成一个
 function mousedownhandler(e) {
  if(!e){
   e=window.event;
  }
  e.preventdefault();
 }
 var div0=document.getelementbyid("div0");
 var div1=document.getelementbyid("div1");
 div0.style.backgroundcolor=randomcolor();
 div1.style.backgroundcolor=randomcolor();
 
 randomposition(div0)
 randomposition(div1)
 var drag0=new dragobj(div0);
 div0.addeventlistener("mousemove",mousemovehandler)
 function randomcolor() {
  var str="#";
  for(var i=0;i<3;i++){
   var color=math.floor(math.random()*256).tostring(16);
   if(color.length<2){
    color="0"+color;
   }
   str+=color;
  }
  return str;
 }
 
 function randomposition(div) {
  div.style.left=math.random()*(document.documentelement.clientwidth-50)+"px";
  div.style.top=math.random()*(document.documentelement.clientheight-50)+"px";
 
 
 }
 
 function mousemovehandler(e) {
  if(!e){
   e=window.event;
  }
  if(!drag0.movebool) return;
 
  if(hittest.to(div0,div1)){
   randomposition(div1);
   div1.style.backgroundcolor=randomcolor();
 
  }
 }
</script>
 
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。