JavaScript实现Flash炫光波动特效

2019-11-20 12:28:42

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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 style="background:#000;margin-top:100px"></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。

以上所述就是本文的全部内容了，希望大家能够喜欢。

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