function init()
{
	this.angle = 0;
}

function update(dt)
{
	this.angle+=80.0*dt;
	if (this.angle >= 360.0)
		this.angle -= 360.0;
}

function render()
{
//	gl.Scale(3.0,3.0,3.0);

//	gl.DisableDepthTest();
//	gl.EnableBlend();

	gl.Translate(-1,-1,0);
	gl.Rotate(15,0,1,0);
	gl.Rotate(-45,1,0,0);

	var x=-2;
	var y=-2;
	var z=0;
	var nbx = 15;
	var nby = 15;
	var grey=0;
	var rndx,rndy;

	var i,j;
	for (i=0;i<nbx;i++)
	{
		y = -2;
		for (j=0;j<nby;j++)
		{
			z = 2*((Math.cos((this.angle+i*5+j*8)*Math.PI/180.0)+1)*0.5);
			grey = z/2;
			rndx = Math.random()*0.03;
			rndy = Math.random()*0.03;

			gl.Color4(0.8,0.8,0.8,0.6);	
			gl.Line3D(x,y,0,x+rndx,y+rndy,z);
			gl.PushMatrix();
			gl.Translate(x+rndx,y+rndy,z);
			gl.Scale(0.04,0.04,0.1);
			gl.Color(grey,grey,grey);	
			gl.CubeSimple();
			gl.PopMatrix();
			y+=4/nby;
		}
		x += 4/nbx;
	}

	gl.DisableBlend();
}