AcidAtractor
/**
* Copyright Murai ( http://wonderfl.net/user/Murai )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/yrXk
*/
// forked from Murai's TrippyAtractor
package {
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageQuality;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.geom.ColorTransform;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundLoaderContext;
import flash.media.SoundMixer;
import flash.net.URLRequest;
import flash.utils.ByteArray;
[SWF(backgroundColor="#FFFFFF", frameRate="60", width="465", height="465")]
/**
* @author Takashi Murai (KAYAC)
*/
/*
* Free Music Archive: Digi G'Alessio - darix togni http://t.co/6TchjWv via
* http://creativecommons.org/licenses/by-nc-nd/3.0/
*/
public class AcidTrippyAtractor extends Sprite {
private const N:uint = 10000;
private var _a:Number;
private var _b:Number;
private var _c:Number;
private var _d:Number;
private var _va:Number = 1.0;
private var _vb:Number = 1.0;
private var _vc:Number = 1.0;
private var _vd:Number = 1.0;
private var _head:Particle;
private var _canvas:BitmapData;
private var _w:uint;
private var _h:uint;
private var snd:Sound;
private var FFTswitch:Boolean = true;
private var count:int;
private var vol:Number;
private var bmp:Bitmap;
private var _trans:ColorTransform = new ColorTransform(1, 1, 1, 1, 0x4F, 0x4F, 0x4F);
private var hexs:Array = [0x2e0927,0xd90000,0xff2d00,0xff8c00,0x04756f];
private var bytes:ByteArray;
function AcidTrippyAtractor() {
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.quality = StageQuality.LOW;
_w = 600;
_h = 600;
play("http://level0.kayac.com/images/murai/Digi_GAlessio_-_06_-_darix_togni.mp3");//A
count = 0;
/////
var o:Particle = _head = new Particle();
for (var i:uint = 0; i < N; ++i) {
o = o.next = new Particle();
}
_canvas = new BitmapData(_w, _h, false, 0xffffff);
bytes= new ByteArray();
addChild(bmp = new Bitmap(_canvas));
addEventListener(Event.ENTER_FRAME, _update);
addEventListener(Event.ENTER_FRAME, render);
stage.addEventListener(Event.RESIZE, resize);
resize();
change();
}
private function resize(e:Event = null) : void {
bmp.x = stage.stageWidth / 2 - bmp.width / 2;
bmp.y = stage.stageHeight / 2 - bmp.height / 2;
}
private function _reset():void {
_a = (Math.random() - 0.5) * 3;
_b = (Math.random() - 0.5) * 3;
_c = (Math.random() - 0.5) * 6;
_d = (Math.random() - 0.5) * 6;
if (Math.abs(_a) < 0.8) _a += 0.8 * _a / Math.abs(_a);
if (Math.abs(_b) < 0.8) _b += 0.8 * _b / Math.abs(_b);
if (Math.abs(_c) < 1.0) _c += 1.0 * _c / Math.abs(_c);
if (Math.abs(_d) < 1.0) _d += 1.0 * _d / Math.abs(_d);
var p:Particle = _head;
do {
p.x0 = (Math.random() - 0.5) * 2;
p.y0 = (Math.random() - 0.5) * 2;
}
while (p = p.next);
}
private function _update(e:Event):void {
_canvas.lock();
_canvas.colorTransform(_canvas.rect, _trans);
var p:Particle = _head;
do {
p.x1 = Math.sin(_a * p.y0) + _c * Math.cos(_a * p.x0) + Math.random() * vol*2;
p.y1 = Math.sin(_b * p.x0) + _d * Math.cos(_b * p.y0) + Math.random() * vol*2;
p.x0 = p.x1;
p.y0 = p.y1;
_canvas.setPixel(_w / 2 + p.x1 * 70, _h / 2 + p.y1 * 70, hexs[((count++)/20000>>0) % 5]);
}
while (p = p.next);
_canvas.unlock();
if (_a < -3.0) _va = 1.0; else if (_a > 3.0) _va = -1.0;
if (_b < -3.0) _vb = 1.0; else if (_b > 3.0) _vb = -1.0;
if (_c < -3.0) _vc = 1.0; else if (_c > 3.0) _vc = -1.0;
if (_d < -3.0) _vd = 1.0; else if (_d > 3.0) _vd = -1.0;
_a += _va * 0.0010;
_b += _vb * 0.0008;
_c += _vc * 0.0004;
_d += _vd * 0.0006;
}
private function change():void {
_reset();
}
private function play(sndUrl:String):void {
snd = new Sound();
var context:SoundLoaderContext = new SoundLoaderContext(10, true);
var req:URLRequest = new URLRequest(sndUrl);
snd.load(req, context);
var sndChannel:SoundChannel = new SoundChannel();
sndChannel = snd.play(0, 9999);
}
private function render(e:Event):void {
bytes.clear();
SoundMixer.computeSpectrum(bytes, FFTswitch, 0);
vol = bytes.readFloat();
if(vol > .8)change();
for (var i:int = 0; i < 100; i++) {
vol = bytes.readFloat();
}
}
}
}
internal class Particle {
public var x1:Number;
public var y1:Number;
public var x0:Number;
public var y0:Number;
public var next:Particle;
}