利用js实现div画椭圆曲线运动特效代码-JS特效-爱易网页

利用js实现div画椭圆曲线运动特效代码

日期：2014-05-18　浏览次数：20186 次

以下是程序代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<meta charset=gbk>
<title>椭圆曲线</title>
</head>
<style>
*{
margin:0px;padding:0px; 
}
div{
border:1px solid #111;
}
.points{
width:1px;height:1px;border:0px solid #111;
position:absolute;
line-height:1px;font-size:1px;
background:#111;
}
.go-oval{
width:10px;height:10px;border:0px solid #111;
position:absolute;
line-height:1px;font-size:1px;
background:#111;
border-radius:5px;
}
</style>
<body>
 <div style="position:absolute;left:80px;top:30px;height:500px;width:500px;">
  <div id="tuoyuan1" style="height:500px;width:500px;"></div>
  <div id="go-oval1" class="go-oval"></div>
 </div>
 
 <div style="position:absolute;left:800px;top:130px;height:500px;width:900px;">
  <div id="tuoyuan2" style="height:500px;width:900px;"></div>
  <div id="go-oval2" class="go-oval"></div>
 </div>
 
 
</body>
</html>
<script>
(function(){
 function $(idd){
  var obj = {};
  if( typeof( idd ) === 'string'){
   var idName = idd.substr(1, idd.length );
   //alert(idName)

if( idd.substr(0,1) === '#' ){
    obj = document.getElementById(idName);
   }
   else if( idd.substr(0,1) === '.'){
    obj =  document.getElementsByName(idName);
    //obj = obj.length ? document.getElementsByClassName(idName) : null;
    //alert(obj.length);
    //alert( obj[0].className )
   }
   else if( idd == 'document' ){
    obj = document;
   }
   else {
    obj = document.getElementsByTagName(idd);
    //alert(idd)
   }
  }
  else {
   obj = idd;
  }

return obj;
 }
 
 //alert(document.body.clientWidth  )
 
 //生成椭圆曲线的点（数组）
 function make_points(a, b, interval, addX, addY){
  var x,y;
  var xy = [],xy1 = [],xy2 = [];
  
  addX = addX ? addX : a;
  addY = addY ? addY : b;
  
  x = - Math.sqrt( (b*b)*a*a/(b*b) );
  
  for(var n = 0; 1; n ++){
   y = Math.sqrt( b*b - (b*b*x*x)/(a*a) );
   
   if( n == 0 ){
    y0 = y;
   }
   
   xy1[n] = [x + addX,y + addY];
   //n++;
   xy2[n] = [x + addX,-y + addY];
   x = x + interval;
   
   if( x > Math.sqrt( (b*b)*a*a/(b*b) ) ){
    break;
   }
  }
  
  //xy2倒序
  /*
  xy2 = xy2.sort(function(x,y){
    return x == y ? 0 : (x > y ? -1 : 1);
  });
  */
  for(var n = 0, n2 = len = xy2.length - 1 ; n <= len; n ++, n2--){
   xy[n] = xy2[n2];
  }
  
  xy = xy1.concat(xy);
  
  return xy;
 }
 
 //画椭圆曲线
 function draw_oval(points){
  var len = points.length;
  var divs = '';
  
  for(var n = 0; n < len; n ++){
   divs += '<div class="points" style="left:'+ points[n][0] +'px;top:'+ points[n][1] +'px;"></div>';
  }
  
  return divs;
 }
 
 //沿着曲线跑动
 function go_oval(idd,points, n, t, addX, addY){
  var len = points.length;
  n = n ? n : 0;
  t = t ? t : 10;
  addX = addX ? addX : 0;
  addY = addY ? addY : 0;
  
  var $obj = $(idd).style;
  $obj.left = points[n][0] + addX + 'px';
  $obj.top = points[n][1] + addY + 'px';
  
  n ++;
  
  n = n == len ? 0 : n;
  
  setTimeout(function(){
   go_oval(idd, points, n, t, addX, addY);
  },t);
  
  
 }
 
 window.onload = function(){
  
  var points1 = make_points(50,100,1,200,200);
  var points2 = make_points(200,100,1);
  
  //画椭圆曲线
  $('#tuoyuan1').innerHTML =  draw_oval( points1 );
  $('#tuoyuan2').innerHTML =  draw_oval( points2 );
  
  //alert( make_points(200,100,3) )
  
  //小点在曲线上跑动
  go_oval('#go-oval1',points1,0,10 ,-5,-5);
  g</div></div>

<div class="clearfix"></div>
                    </div>
                    <nav aria-label="...">
                        <ul class="pager">
                            <li class="previous"><a href="4667">上一篇：狡猾的按钮特效</a></li>

<li class="next"><a href="3242">下一篇：JQuery实现仿sina新浪微博新鲜事滚动特效代码</a></li>
                        </ul>
                    </nav>

<div class="alert alert-warning" role="alert">
                        <strong>免责声明：</strong> 本文仅代表作者个人观点，与爱易网无关。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。
                    </div>

<div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/394' title='空气污染器市场乱象丛生 选购需慎重' target="_blank">
                        空气污染器市场乱象丛生 选购需慎重</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34273' title='任正非：华为决不上市 上市公司股东贪婪而短视' target="_blank">
                        任正非：华为决不上市 上市公司股东贪婪而短视</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/6894' title='微软提示XP只剩365天寿命：用户被绑架？' target="_blank">
                        微软提示XP只剩365天寿命：用户被绑架？</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34368' title='湘鄂情剥离餐饮业务进军大数据的底气在哪里？' target="_blank">
                        湘鄂情剥离餐饮业务进军大数据的底气在哪里？</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34377' title='华为坚持不上市究竟为何？不差钱也不想冒风险' target="_blank">
                        华为坚持不上市究竟为何？不差钱也不想冒风险</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/431' title='清点：罗永浩推锤子ROM 小米打法遭模拟' target="_blank">
                        清点：罗永浩推锤子ROM 小米打法遭模拟</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34163' title='三问刘强东：京东为何近来火气这么大？' target="_blank">
                        三问刘强东：京东为何近来火气这么大？</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34426' title='这一次，微软将带给我们什么惊喜？' target="_blank">
                        这一次，微软将带给我们什么惊喜？</a></li></div>
                   
                
                  <div class="col-md-6 col-xs-12">
                      <li class="articleAbout"><a href='/ItNews/34316' title='蜗牛移动董事长石海：号卡被叫停属乌龙事件' target="_blank">
                        蜗牛移动董事长石海：号卡被叫停属乌龙事件</a></li></div>
                   
                
        </ol>
    </div>
</div>

</div>

</div>
            </div>
            <div class="clearfix"></div>

<footer class=" footer navbar-bottom">
<em>友情链接：</em>
    
      <a href="http://www.aiyiweb.com/" target="_blank">爱易网 </a>            
    
      <a href="http://www.aiyiweb.com/" target="_blank">云虚拟主机技术 </a>            
    
      <a href="http://www.aiyiweb.com/" target="_blank">云服务器技术 </a>            
    
      <a href="http://www.aiyiweb.com/" target="_blank">程序设计技术 </a>            
    
      <a href="http://www.aiyiweb.com/" target="_blank">开发网站 </a>            
    
      <a href="http://www.aiyiweb.com/" target="_blank">APP开发教程 </a>            
    
<br />
<script type="text/javascript">(function(){document.write(unescape('%3Cdiv id="bdcs"%3E%3C/div%3E'));var bdcs = document.createElement('script');bdcs.type = 'text/javascript';bdcs.async = true;bdcs.src = 'http://znsv.baidu.com/customer_search/api/js?sid=15239353030108964139' + '&plate_url=' + encodeURIComponent(window.location.href) + '&t=' + Math.ceil(new Date()/3600000);var s = document.getElementsByTagName('script')[0];s.parentNode.insertBefore(bdcs, s);})();</script>

Copyright © 2013-2026 爱易网页 当前在线：234人　
        网站在8时58分44秒内访问总人数：58597人
    当前 8.84%
　<a href="https://beian.miit.gov.cn" target="_blank">粤ICP备18100884号-2 </a>
<script charset="UTF-8" id="LA_COLLECT" src="//sdk.51.la/js-sdk-pro.min.js"></script>
<script>LA.init({ id: "JszEmKrtpbU59dY5", ck: "JszEmKrtpbU59dY5" })</script>

</footer>

</div>
   
</body>
</html>