AS3 Papervision + Sound Visualizer + Line3D + Tweener – Part 2 FF07
Posted: September 20, 2007 at 9:43 pmSo here's my Flash Forward inspired piece!
Once again used Andy's great Line3D class and gave it a Flash Forward 07 twist.
package com.hydrotik { import flash.events.Event; import flash.display.*; import flash.net.URLRequest; import flash.media.Sound; import flash.media.SoundChannel; import flash.media.SoundMixer; import flash.utils.ByteArray; import caurina.transitions.Tweener; import org.papervision3d.core.proto.*; import org.papervision3d.core.geom.*; import org.papervision3d.scenes.*; import org.papervision3d.cameras.*; import org.papervision3d.objects.*; import org.papervision3d.materials.*; public class Hydro3D extends Sprite { private static const LOOP:String = "../flashassets/mp3/jens_buchert.mp3"; private const STAGE_WIDTH :Number = 600; private const STAGE_HEIGHT :Number = 300; private const ANIMATION_TIME :Number = 1; private const ANIMATION_TYPE :String = "easeoutquad"; private const MULT :int = 10; private var controlPoints :Array; private var itemArray :Array; private var trailArray :Array; private var currTrailArray :Array; private var lineArray :Array; private var count :int = 0; private var container :Sprite; private var scene :MovieScene3D; private var camera :Camera3D; private var sc :SoundChannel; private var s :Sound; private var lines :Line3D; public function Hydro3D():void { controlPoints = []; itemArray = []; trailArray = []; currTrailArray = []; lineArray = []; s = new Sound(); s.load(new URLRequest(LOOP)); sc = s.play(0, 1000); //container container = new Sprite(); container.cacheAsBitmap = true; addChild( container ); container.x = STAGE_WIDTH/2; container.y = STAGE_HEIGHT/2; //scene scene = new MovieScene3D( container ); //camera camera = new Camera3D(); camera.z = -200; addEventListener( Event.ENTER_FRAME, onEnterFrame ); } private function onEnterFrame( event: Event ):void { camera.x +=((container.mouseX*10) - camera.x) * 0.005; camera.y +=((container.mouseY*10) - camera.y) * 0.005; var bytes:ByteArray = new ByteArray(); SoundMixer.computeSpectrum(bytes, false, 0); var amp:Number = ((sc.leftPeak + sc.rightPeak)/2); lineArray[count] = new Line3D([new Vertex3D(-128, 0, -(count * MULT))], rgbToHex(count/4, count/6, count), 1, 1); scene.addChild(lineArray[count]); for(var i:int = 0; i < 256; i++){ var v:Vertex3D = new Vertex3D((i*2) - 128, bytes.readFloat() * 300, -(count * MULT)); lineArray[count].addVertex(v); } Tweener.addTween(lineArray[count], { alpha:0, time:ANIMATION_TIME, transition:ANIMATION_TYPE, onComplete:removeLine, onCompleteParams:[lineArray[count]] }); scene.renderCamera( camera ); count = (count < 50) ? count + 1 : 0; }; private function removeLine(l:Line3D = null):void{ scene.removeChild(l); } public function rgbToHex(uR:uint, uG:uint, uB:uint):int{ var uColor:uint; uColor = (uR & 255) << 16; uColor += (uG & 255) << 8; uColor += (uB & 255); return uColor; } } }
I didn't do anything with the amplitude but I left it in there if you decide you want to play with it. It's somewhat processor intensive. I wish external mp3's would loop. You'd think Adobe would have addressed that by now. Because of that, you'd want to attach it from your library, but I think it's ok for testing. Helps you find a good loop that gives you good results when playing with a visualizer. Just overwrite the mp3 file or switch the path.
Once again the loop I'm using:
The music is the song "Mélange Eléctrique" from Jens Buchert's album Spa Lounge. Great downtempo album.
The Discussion
see what everyone is saying
Excellent demo and great music choice. Look forward to meet you here in Boston.
Sorry I can't see anything! Windows XP, tried both IE7 and FireFox, Flash Player 9,0,47,0
There is a bug in the flash player with IE7. The onComplete loading event doesn't fire. I was lazy and forgot to update the loader in this example using only an onEnterframe event to determine progress. If you remove the complete event and do a gotoAndPlay(2) then you should be fine. I plan on posting an example of that soon, but it's easy to find and is a known issue.
[...] Donovan Adams: 1, 2, 3, 4, 5 [...]
[...] Donovan Adams also has a demo using PV3D (and its new Line3D) and Tweener for audio visualization, although in a different way. [...]
[...] Donovan Adams also has a demo using PV3D (and its new Line3D) and Tweener for audio visualization, although in a different way. [...]