★JS打造的炫光波动效果(模拟flash/双线波动)★

2014-04-06 03:01:42 -0400

代码说明

JavaScript写的炫光波动效果，看到一些Flash效果不错，用JS也模拟一下，还有很多不完善的地方，给各位参考参考。转自网页代码站

HTML代码

<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,0,3,36,240,6,20,60);
 new lightWave(targetDom,50,2,70,240,10,30,40);
//数值分别为炫光容器，炫光向右偏移量，粗细，尖锐度，波动速度，单位时间内的振动频率，振幅，透明度
}
</script>

代码演示

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