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首页 / 脚本样式 / JavaScript / javascript实现3D变换的立体圆圈实例

本文实例讲述了javascript实现3D变换的立体圆圈。分享给大家供大家参考。具体如下:
这里使用javascript实现会变换的立体圆圈,在网页3D变化,变色的圆圈特效,网页上的3d圆圈特效。圆圈上的每一点的颜色并不一样,在黑色的网页背景下更能看清楚。
运行效果如下图所示:

具体代码如下:
<html><head><title>变色的圆圈</title><style type="text/css"><!--body {background-color: #000000;}--></style></head><body><script language="JavaScript">var CoLoUrS=new Array("ff0000","ffffff","0000ff","ffffff");var dots=16;var step=0.3;var a_StEp=0.05;var RunTime=Xpos =Ypos =count_a=count=currStep =0;var cntr=70;var move_a=move=1;var curColour;document.write("<div id="moveDiv" style="position:absolute;top:0px;left:0px">");for (i=0; i < dots; i++){document.write("<div style="position:absolute;top:0px;left:0px;width:2px;height:2px;background:#ffffff;font-size:2px"></div>");}document.write("</div>");var x = moveDiv.all;var numdiv=new Array(x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7],x[8],x[9],x[10],x[11],x[12],x[13],x[14],x[15]);function colourStep(){count+=move;if (count >= numdiv.length) {count=0;count_a+=move}if (count_a == CoLoUrS.length) count_a=0;numdiv[count].style.background=CoLoUrS[count_a];setTimeout("colourStep()",100)}function divmove(){Ypos = document.body.scrollTop+document.body.offsetHeight/2 + document.body.offsetHeight/2.8*Math.cos((RunTime)/3)*Math.cos(RunTime/10);Xpos= document.body.scrollLeft+document.body.offsetWidth/2 + document.body.offsetWidth/2.4*Math.sin((RunTime)/5)*Math.sin(RunTime/20);RunTime+=a_StEp;Tma=setTimeout("divmove()", 10);}function overturn(){for (i=0;i<numdiv.length;i++){numdiv[i].style.top = Ypos+cntr*Math.cos((currStep + i*4)/10.2)*Math.cos(currStep/10);numdiv[i].style.left= Xpos+cntr*Math.sin((currStep + i*4)/10.2);}currStep+=step;setTimeout("overturn()",10);}function Shrink(){cntr-=0.5;GoShrink=setTimeout("Shrink()",10);if (cntr <=20){clearTimeout(GoShrink);Swell()}}function Swell(){cntr+=0.5;GoSwell=setTimeout("Swell()",10);if (cntr >=70){clearTimeout(GoSwell);Shrink()}}function transfer(){divmove();//移动层overturn();//使层进行翻转Shrink();//改变层的大小colourStep();//变换层的颜色}transfer();</script></body></html>
希望本文所述对大家的javascript程序设计有所帮助。