JavaScript實現Flash炫光波動特效

2024-05-06 16:20:13

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來源：轉載

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JavaScript寫的炫光波動效果,看到一些Flash效果不錯,用JS也模擬一下,還有很多不完善的地方,給各位參考參考。

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();

}