alg_waveform.js

(function() {
    if(!document.time) document.time = 0;
    document.time++;
    
    var t = document.time;
    
    for(var i = 0; i < sound.length; i++) {
		sound[i] = (t*(((t>>12)|(t>>8))&(63&(t>>4))))/0xff % 1;
		t++;
	}
	document.time = t;
	
	var rand = function() { return Math.floor(Math.random()*255); }
	var r = rand();
	var g = rand();
    var b = rand();

    //ctx.clearRect(0, 0, canvas.width, canvas.height);
    ctx.strokeStyle = "rgb("+r+", "+g+", "+b+");";
    ctx.fillStyle = "rgb("+r+", "+g+", "+b+");";
    ctx.beginPath();
    ctx.moveTo(0, canvas.height/2);
    for(var x = 0; x < canvas.width; x++) {
        var k = sound.length * (x / canvas.width);
        ctx.lineTo(x, canvas.height - (canvas.height/2 + sound[k]*canvas.height/2));
    }
    ctx.fill();
})