tinyHeart/js/wave.js

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var waveObj=function()
{
	this.x=[];
	this.y=[];
	this.alive=[];
	this.r=[];
}
waveObj.prototype.num=10;
waveObj.prototype.init=function()
{
	for(var i=0;i<this.num;i++)
	{
		this.alive[i]=false;
	}
}
waveObj.prototype.draw=function()
{
	ctx1.save();
	ctx1.lineWidth=2;
	ctx1.shadowBlur=5;
	ctx1.shadowColor="white";
	for(var i=0;i<this.num;i++)
	{
		if(this.alive[i])
		{
			this.r[i]+=deltaTime*0.04;
			if(this.r[i]>60)
			{
				this.alive[i]=false;
				break;
			}
			var alpha=1-this.r[i]/60;

			ctx1.beginPath();
			ctx1.strokeStyle="rgba(255,255,255,"+alpha+")";
			ctx1.arc(this.x[i],this.y[i],this.r[i],0,Math.PI*2);
			ctx1.closePath();
			ctx1.stroke();
			
		}
	}
	ctx1.restore();
}
waveObj.prototype.born=function(x,y)
{
	for(var i=0;i<this.num;i++)
	{
		if(!this.alive[i])
		{
			this.alive[i]=true;
			this.r[i]=10;
			this.x[i]=x;
			this.y[i]=y;
			return;
		}
	}
}