看到flash的實現這類的動畫非常的便捷，于是試圖胡搞一下。全部是用dom模擬的像素點，鋸齒是難免的……
這個要避免鋸齒恐怕要再加一次濾鏡了吧，或者用圖片。
<!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>炫光波動效果</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;//粗細this.sharp = sharp;//尖銳度this.speed = speed;//波動速度this.vibration = vibration;//單位時間內的振動頻率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>參數：
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; //炫光出生時的向右偏移量 this .thick = thick; //粗細程度 this .sharp = sharp; //尖銳程度 this .speed = speed; //波動速度 this.vibration = vibration; //單位時間內的振動頻率 this .amplitude = amplitude; //振幅 this .opacity = opacity; //透明度 this .cont.style.position = 'relative'; this .move();}大家感興趣可以來討論一下。
另外，還遇到個問題，上面代碼中ie下面的透明度濾鏡不起作用，經研究得知，改變父容器的定位會影響子節點的透明濾鏡的繼承。
以上所述就是本文的全部內容了，希望大家能夠喜歡。
新聞熱點
疑難解答
