看到flash的实现这类的动画非常的便捷，于是试图胡搞一下。全部是用dom模拟的像素点，锯齿是难免的……
这个要避免锯齿恐怕要再加一次滤镜了吧，或者用图片。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>炫光波动效果</title> <script> var lightWave = function(T,left,thick,sharp,speed,vibration,amplitude,opacity){ this.cont = T;//炫光容器 this.left = left;//炫光向右偏移量 this.thick = thick;//粗细 this.sharp = sharp;//尖锐度 this.speed = speed;//波动速度 this.vibration = vibration;//单位时间内的振动频率 this.amplitude = amplitude;//振幅 this.opacity = opacity;//透明度 this.cont.style.position = 'relative'; this.move(); } lightWave.prototype = { point:function(n,l,t,c,color){ var p = document.createElement('p'); p.innerHTML = ' '; p.style.top = t + 'px'; p.style.left = l + 'px'; p.style.width = 1 + 'px'; p.style.height = n + 'px'; p.style.filter = 'alpha(opacity='+this.opacity+')'; p.style.lineHeight = 0; p.style.position = 'absolute'; p.style.background = color; c.appendChild(p); return this; }, color:function(){ var c = ['0','3','6','9','c','f']; var t = [c[Math.floor(Math.random()*100)%6],'0','f']; t.sort(function(){return Math.random()>0.5?-1:1;}); return '#'+t.join(''); }, wave:function(){ var l = this.left,t = this.wavelength,color = this.color(); var c = document.createElement('div'); c.style.top = this.amplitude+20+'px'; c.style.position = 'absolute'; c.style.opacity = this.opacity/100; for(var i=1;i<this.thick;i++){ for(var j=0;j<this.thick*this.sharp-i*i;j++,l++){ this.point(i,l,-9999,c,color); } } for(var i=this.thick;i>0;i--){ for(var j=this.thick*this.sharp-i*i;j>0;j--,l++){ this.point(i,l,-9999,c,color); } } this.cont.appendChild(c); return c; }, move:function(){ var wl = this.amplitude; var vibration = this.vibration; var w = this.wave().getElementsByTagName('p'); for(var i=0;i<w.length;i++){ w[i].i = i; } var m = function(){ for(var i=0,len=w.length;i<len;i++){ if(w[i].ori == true){ w[i].i-=vibration; var top = w[i].i%180==90?0:wl*Math.cos(w[i].i*Math.PI/180); w[i].style.top = top+'px'; if(parseFloat(w[i].style.top)<=-wl){ w[i].ori = false; } }else{ w[i].i+=vibration; var top = w[i].i%180==90?0:wl*Math.cos(w[i].i*Math.PI/180); w[i].style.top = top+'px'; if(parseFloat(w[i].style.top)>=wl){ w[i].ori = true; } } } } setInterval(m,this.speed); } } window.onload = function(){ var targetDom = document.body; new lightWave(targetDom,0,3,36,120,6,20,40); new lightWave(targetDom,50,2,70,120,10,30,30); } </script> </head> <body> </body> </html>
参数：
var lightWave = function (T,left,thick,sharp,speed,vibration,amplitude,opacity){ this .cont = T; //需要添加炫光的容器 this .left = left; //炫光出生时的向右偏移量 this .thick = thick; //粗细程度 this .sharp = sharp; //尖锐程度 this .speed = speed; //波动速度 this.vibration = vibration; //单位时间内的振动频率 this .amplitude = amplitude; //振幅 this .opacity = opacity; //透明度 this .cont.style.position = 'relative'; this .move(); }
大家感兴趣可以来讨论一下。
另外，还遇到个问题，上面代码中ie下面的透明度滤镜不起作用，经研究得知，改变父容器的定位会影响子节点的透明滤镜的继承。