forked from: forked from: Sound Spectrum Ring
よりデジタル風にしてみた。
*
* sound spectrum
* サウンドスペクトル表示
*
* ♪使用音楽素材について♪
* 音楽素材/魔王魂（http://maoudamashii.jokersounds.com/）の素材を使わせていただきました。
* ありがとうございます。
*
/**
* Copyright takishiki ( http://wonderfl.net/user/takishiki )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/6D0V
*/
// forked from takishiki's forked from: Sound Spectrum Ring
// forked from takishiki's Sound Spectrum Ring
/*
* よりデジタル風にしてみた。
*
* sound spectrum
* サウンドスペクトル表示
*
* ♪使用音楽素材について♪
* 音楽素材/魔王魂（http://maoudamashii.jokersounds.com/）の素材を使わせていただきました。
* ありがとうございます。
*
*/
package
{
import flash.display.Sprite;
import flash.events.Event;
import flash.display.Graphics;
import flash.geom.Point;
import flash.system.Security;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundLoaderContext;
import flash.media.SoundTransform;
import flash.media.SoundMixer;
import flash.net.URLRequest;
import flash.utils.ByteArray;
[SWF(width = 465, height = 465, frameRate = 30, backgroundColor = 0x000000)]
public class Main extends Sprite
{
// 定数
private const FFT_MODE :Boolean = false;
private const COLOR :Array = [0xFF0000, 0xFFFF00, 0x990000, 0x999900];
// 変数
private var _sp :Sprite;
// constructor
public function Main():void {
stage.frameRate = 30;
_sp = new Sprite();
_sp.x = stage.stageWidth / 2;
_sp.y = stage.stageHeight / 2;
this.addChild(_sp);
// mp3
var snd:Sound = new Sound();
Security.loadPolicyFile("http://mutast.heteml.jp/crossdomain.xml");
var req:URLRequest = new URLRequest("http://vaindog.raindrop.jp/wonderfl/sound/bgm_maoudamashii_cyber06.mp3");
var context:SoundLoaderContext = new SoundLoaderContext(10, true);
snd.load(req, context);
var channel:SoundChannel = snd.play();
var transform:SoundTransform = new SoundTransform();
transform.volume = 0.5; // ボリュームを半分に
transform.pan = 0.0; // パンは中央
channel.soundTransform = transform;
// 再生終了時
channel.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete);
// フレーム処理
this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
// 再生終了時
private function onPlaybackComplete(event:Event):void {
this.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
_sp.graphics.clear();
}
// フレーム処理
private function onEnterFrame(event:Event):void {
var bytes:ByteArray = new ByteArray();
const CHANNEL_LENGTH:int = 256;
const R:int = 200;
const OFFSET:int = 100;
var color:uint;
var i:int;
var index:uint;
var n:Number;
var rad:Number;
var point:Point = new Point();
var point0:Point = new Point();
var point1:Point = new Point();
var point2:Point = new Point();
var point3:Point = new Point();
var g:Graphics = _sp.graphics;
g.clear();
SoundMixer.computeSpectrum(bytes, FFT_MODE, 0);
// L
index = 0;
for (i = 0; i < CHANNEL_LENGTH; i++) {
n = bytes.readFloat() * R + OFFSET;
if (i % 8 != 0) continue;
color = n >= OFFSET ? COLOR[index] : COLOR[index + 2];
g.lineStyle(1, color);
g.beginFill(color, 0.5);
rad = deg2rad(360 * i / (CHANNEL_LENGTH - 1)) - deg2rad(360 / CHANNEL_LENGTH);
point0 = new Point(OFFSET * Math.cos(rad), OFFSET * Math.sin(rad));
point1 = new Point(n * Math.cos(rad), n * Math.sin(rad));
rad = deg2rad(360 * i / (CHANNEL_LENGTH - 1)) + deg2rad(360 / CHANNEL_LENGTH);
point3 = new Point(OFFSET * Math.cos(rad), OFFSET * Math.sin(rad));
point2 = new Point(n * Math.cos(rad), n * Math.sin(rad));
g.moveTo(point0.x, point0.y);
g.lineTo(point1.x, point1.y);
g.lineTo(point2.x, point2.y);
g.lineTo(point3.x, point3.y);
g.lineTo(point0.x, point0.y);
g.endFill();
}
// R
index = 1;
for (i = 0; i < CHANNEL_LENGTH; i++) {
n = bytes.readFloat() * R + OFFSET;
if (i % 8 != 0) continue;
color = n >= OFFSET ? COLOR[index] : COLOR[index + 2];
g.lineStyle(1, color);
g.beginFill(color, 0.5);
rad = deg2rad(360 * i / (CHANNEL_LENGTH - 1)) - deg2rad(360 / CHANNEL_LENGTH) + index * deg2rad(360 / CHANNEL_LENGTH) * 4;
point0 = new Point(OFFSET * Math.cos(rad), OFFSET * Math.sin(rad));
point1 = new Point(n * Math.cos(rad), n * Math.sin(rad));
rad = deg2rad(360 * i / (CHANNEL_LENGTH - 1)) + deg2rad(360 / CHANNEL_LENGTH) + index * deg2rad(360 / CHANNEL_LENGTH) * 4;
point3 = new Point(OFFSET * Math.cos(rad), OFFSET * Math.sin(rad));
point2 = new Point(n * Math.cos(rad), n * Math.sin(rad));
g.moveTo(point0.x, point0.y);
g.lineTo(point1.x, point1.y);
g.lineTo(point2.x, point2.y);
g.lineTo(point3.x, point3.y);
g.lineTo(point0.x, point0.y);
g.endFill();
}
}
// degree -> radian
private function deg2rad(deg:Number):Number {
deg %= 360;
return deg / 180 * Math.PI;
}
}
}