soundSpectrumGalaxy
/**
* Copyright zob ( http://wonderfl.net/user/zob )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/gOxJ
*/
package
{
import flash.display.*;
import flash.filters.*;
import flash.events.*;
import flash.net.*;
import flash.utils.*;
import flash.geom.*;
import flash.text.*;
import flash.system.*;
import flash.ui.*;
import flash.media.*;
[SWF(width=465,height=465,backgroundColor=0x000000,frameRate=60)]
public class galaxy extends Sprite
{
// data
public var bmpd:BitmapData = new BitmapData(stage.stageWidth, stage.stageHeight);
private var bmp:Bitmap = new Bitmap(bmpd);
// objects
private var stars:Vector.<Dot> = new Vector.<Dot>();
private var SPF:int = 10; // Star Per Frame
private var damp:Number = 0.9;
private var speed:Number = 0.5;
private var focalLength:Number = 1000;
private var ct:ColorTransform = new ColorTransform(1,1,1,0.6);
private var cp:Dot = new Dot(stage.stageWidth/2, stage.stageHeight/2);
private var snd:Sound;
private var FFTswitch:Boolean = false;
private var bytes:ByteArray = new ByteArray();
private var byteTotal:Number = 0;
public function galaxy()
{
addChild(new Bitmap(new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x0)));
addChild(bmp);
bmpd.fillRect(bmpd.rect, 0x0);
init();
}
private function init():void
{
playSound("http://www.takasumi-nagai.com/soundfiles/sound001.mp3");
stage.addEventListener(Event.ENTER_FRAME, processing);
}
private function playSound(sndUrl:String):void
{
snd = new Sound();
var context:SoundLoaderContext = new SoundLoaderContext(1,true);
var req:URLRequest = new URLRequest(sndUrl);
var sndChannel:SoundChannel=new SoundChannel();
snd.load(req, context);
sndChannel = snd.play(0, 9999);
}
private function processing(e:Event):void
{
update();
paint();
}
private function update():void
{
var i:int = 0;
SoundMixer.computeSpectrum(bytes, FFTswitch, 0);
byteTotal = 0;
for(i = 0; i < 512; i++)
{
byteTotal += Math.abs(bytes.readFloat());
}
byteTotal /= 512;
speed = 0.5 + 10 * byteTotal;
for(i = 0; i < 10; i++)
{
stars.push(new Dot(100 + Math.random() * 265, 100 + Math.random() * 265, 0));
}
for(i = 0; i < stars.length; i++)
{
stars[i].oz = stars[i].z;
stars[i].vz += speed;
stars[i].vz *= damp;
stars[i].z -= stars[i].vz;
}
}
private function paint():void
{
bmpd.lock();
bmpd.colorTransform(bmpd.rect, ct);
var i:int = 0;
var scaleRatio:Number = 0;
var px:Number = 0;
var py:Number = 0;
var ox:Number = 0;
var oy:Number = 0;
for(i = 0; i < stars.length; i++)
{
scaleRatio = focalLength/(focalLength + stars[i].z);
px = (stars[i].x - cp.x) * scaleRatio + cp.x;
py = (stars[i].y - cp.y) * scaleRatio + cp.y;
if(px > stage.stageWidth || px < 0 || py < 0 || py > stage.stageHeight)
{
stars.splice(i, 1);
i--;
} else {
scaleRatio = focalLength/(focalLength + stars[i].oz);
ox = (stars[i].x - cp.x) * scaleRatio + cp.x;
oy = (stars[i].y - cp.y) * scaleRatio + cp.y;
lineFast(bmpd, int(px), int(py), int(ox), int(oy), 0xFFFFFFFF);
}
}
bmpd.unlock();
}
public function lineFast(target:BitmapData, x0:int, y0:int, x1:int, y1:int, color:uint):void
{
var pix :uint = color;
var dy :int = y1 - y0;
var dx :int = x1 - x0;
var stepx :int;
var stepy :int;
var fraction :int;
if (dy < 0) { dy = -dy; stepy = -1; } else { stepy = 1; }
if (dx < 0) { dx = -dx; stepx = -1; } else { stepx = 1; }
dy <<= 1;
dx <<= 1;
target.setPixel32(x0, y0, pix);
if (dx > dy)
{
fraction = dy - (dx >> 1);
while (x0 != x1)
{
if (fraction >= 0)
{
y0 += stepy;
fraction -= dx;
}
x0 += stepx;
fraction += dy;
target.setPixel32(x0, y0, pix);
}
} else {
fraction = dx - (dy >> 1);
while (y0 != y1)
{
if (fraction >= 0)
{
x0 += stepx;
fraction -= dy;
}
y0 += stepy;
fraction += dx;
target.setPixel32(x0, y0, pix);
}
}
}
}
}
class Dot
{
public var x:Number = 0;
public var y:Number = 0;
public var z:Number = 0;
public var vx:Number = 0;
public var vy:Number = 0;
public var vz:Number = 0;
public var oz:Number = 0;
public function Dot(px:Number=0,py:Number=0, pz:Number=0)
{
x = px;
y = py;
z = pz;
}
}