JS实现随机乱撞彩色圆球特效的方法

2019-11-20 12:33:26

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本文实例讲述了JS实现随机乱撞彩色圆球特效的方法。分享给大家供大家参考。具体实现方法如下：

<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <title>JS实现的随机乱撞的彩色圆球特效代码</title> <style> body{ font-family: 微软雅黑;  } body,h1{ margin:0; } canvas{ display:block;margin-left: auto;margin-right: auto; border:1px solid #DDD;  background: -webkit-linear-gradient(top, #222,#111); }  </style></head><body> <h1>JS实现的随机乱撞的彩色圆球特效代码</h1><canvas id="canvas" ></canvas><button id="stop">stop</button><button id="run">run</button><button id="addBall">addBall</button><script src="jquery-1.6.2.min.js"></script><script>var nimo={ aniamted:null, content:null, data:{ radiusRange:[5,20], speedRange:[-5,5], scrollHeight:null, scrollWdith:null }, balls:[], ele:{ canvas:null  }, fn:{ creatRandom:function(startInt,endInt){//生产随机数  var iResult;   iResult=startInt+(Math.floor(Math.random()*(endInt-startInt+1)));  return iResult }, init:function(){  nimo.data.scrollWdith=document.body.scrollWidth;  nimo.data.scrollHeight=document.body.scrollHeight;  nimo.ele.canvas=document.getElementById('canvas');   nimo.content=nimo.ele.canvas.getContext('2d');    nimo.ele.canvas.width=nimo.data.scrollWdith-50;  nimo.ele.canvas.height=nimo.data.scrollHeight-100; }, addBall:function(){  var aRandomColor=[];  aRandomColor.push(nimo.fn.creatRandom(0,255));  aRandomColor.push(nimo.fn.creatRandom(0,255));  aRandomColor.push(nimo.fn.creatRandom(0,255));   var iRandomRadius=nimo.fn.creatRandom(nimo.data.radiusRange[0],nimo.data.radiusRange[1]);  var oTempBall={  coordsX:nimo.fn.creatRandom(iRandomRadius,nimo.ele.canvas.width-iRandomRadius),  coordsY:nimo.fn.creatRandom(iRandomRadius,nimo.ele.canvas.height-iRandomRadius),  radius:iRandomRadius,    bgColor:'rgba('+aRandomColor[0]+','+aRandomColor[1]+','+aRandomColor[2]+',0.5)'    };   oTempBall.speedX=nimo.fn.creatRandom(nimo.data.speedRange[0],nimo.data.speedRange[1]);  if(oTempBall.speedX===0){  oTempBall.speedX=1  }  if(oTempBall.speedY===0){  oTempBall.speedY=1  }  oTempBall.speedY=nimo.fn.creatRandom(nimo.data.speedRange[0],nimo.data.speedRange[1]);  nimo.balls.push(oTempBall) }, drawBall:function(bStatic){    var i,iSize;  nimo.content.clearRect(0,0,nimo.ele.canvas.width,nimo.ele.canvas.height)  for(var i=0,iSize=nimo.balls.length;i<iSize;i++){  var oTarger=nimo.balls[i];    nimo.content.beginPath();  nimo.content.arc(oTarger.coordsX,oTarger.coordsY,oTarger.radius,0,10);  nimo.content.fillStyle=oTarger.bgColor;    nimo.content.fill();  if(!bStatic){   if(oTarger.coordsX+oTarger.radius>=nimo.ele.canvas.width){   oTarger.speedX=-(Math.abs(oTarger.speedX))   }   if(oTarger.coordsX-oTarger.radius<=0){   oTarger.speedX=Math.abs(oTarger.speedX)   }   if(oTarger.coordsY-oTarger.radius<=0){   oTarger.speedY=Math.abs(oTarger.speedY)   }   if(oTarger.coordsY+oTarger.radius>=nimo.ele.canvas.height){   oTarger.speedY=-(Math.abs(oTarger.speedY))   }   oTarger.coordsX=oTarger.coordsX+oTarger.speedX;   oTarger.coordsY=oTarger.coordsY+oTarger.speedY;    }    } }, run:function(){  nimo.fn.drawBall();  nimo.aniamted=setTimeout(function(){  nimo.fn.drawBall();  nimo.aniamted=setTimeout(arguments.callee,10)  },10) }, stop:function(){  clearTimeout(nimo.aniamted) } }}window.onload=function(){ nimo.fn.init(); var i; for(var i=0;i<10;i++){ nimo.fn.addBall(); } nimo.fn.run(); document.getElementById('stop').onclick=function(){ nimo.fn.stop() } document.getElementById('run').onclick=function(){ nimo.fn.stop() nimo.fn.run() } document.getElementById('addBall').onclick=function(){ var i; for(var i=0;i<10;i++){  nimo.fn.addBall();  } nimo.fn.drawBall(true); }}</script></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

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