JavaScript implements Flash glare fluctuation special effects

JavaScript implements Flash glare fluctuation special effects_javascript skills

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Release： 2016-05-16 15:59:06

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I saw that flash is very convenient to implement this kind of animation, so I tried to mess around with it. All are pixels simulated using DOM, and aliasing is inevitable...

To avoid aliasing, I probably need to add another filter, or use a picture.

<!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&#63;-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&#63;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&#63;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>

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Parameters:

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();
}

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If you are interested, you can discuss it.

In addition, I also encountered a problem. The transparency filter under ie in the above code does not work. After research, it is found that changing the positioning of the parent container will affect the inheritance of the transparency filter of the child node.

The above is the entire content of this article, I hope you all like it.