/* this code is originally written to be used as a music visualizer used with Sound.computeSpectrum() */ package { import flash.display.*; import flash.events.*; import flash.text.*; import flash.geom.*; import flash.filters.*; public class Main extends Sprite{ private var canvas:BitmapData; private var canvasRect:Rectangle; private var oPt:Point; private var cMtx:ColorMatrixFilter; private var blur:BlurFilter; private var shape:Shape; private var cx:Number,cy:Number; private var verts:Vector.<Number>; private var pVerts:Vector.<Number>; private var uvts:Vector.<Number>; private var pmtx:Matrix3D; private var pers:PerspectiveProjection; private var angles:Vector.<Number>; private var vPos:Vector.<Number>; private var levs:Vector.<Number>; private var xr:Number = 0, yr:Number = 0; private var cnt:uint = 0; private var waves:Array; private var numWaves:uint = 5; private const WAVE_HEIGHT:Number = 50; private const BASE_RADIUS:Number = 80; public function Main() { angles = new Vector.<Number>(); vPos = new Vector.<Number>(); levs = new Vector.<Number>(); var n:Number = 0; var freq:Number; for (var i:uint = 0; i < 2000; i ++) { freq = 55 * Math.pow(2, i/120); if (freq > n * 14080/163.5) { angles.push(Math.PI * 2 * i / 120); vPos.push(-(angles[n] * 6 - 265)); n ++; } if (n >= 256) { break; } } for (i = 0; i < 256; i ++) { levs.push(0); } shape = new Shape(); addChild(new Bitmap(canvas = new BitmapData(stage.stageWidth,stage.stageHeight,true,0xff000000))); canvasRect = canvas.rect; oPt = new Point(0,0); cMtx = new ColorMatrixFilter( [0.99,0,0,0,0, 0,0.99,0,0,0, 0,0,0.99,0,0, 0,0,0,1,0] ); blur = new BlurFilter(2,2); cx = stage.stageWidth / 2; cy = stage.stageHeight / 2; pVerts = new Vector.<Number>(); pmtx = new Matrix3D(); pers = new PerspectiveProjection(); uvts = new Vector.<Number>(); addEventListener(Event.ENTER_FRAME, h_enterFrame); initWaves(); } private function initWaves():void { waves = new Array(); for (var i:uint = 0; i < numWaves; i ++) { waves.push(Math.random()); } } private function h_enterFrame(evt:Event):void { var i:uint,j:uint; var lev:Number; verts = new Vector.<Number>; if (Math.random() < 0.01) { initWaves(); } for (i = 0; i < 256; i ++) { lev = 0; for (j = 0; j < numWaves; j ++) { lev += Math.sin((cnt + i) * waves[j] / 10); } lev = lev / numWaves * (1 + i / 128); if (!levs[i]) { levs[i] = 0; } if (lev > levs[i]) { levs[i] = (lev + levs[i]) / 2; } else { levs[i] *= 0.9; } verts.push(Math.cos(angles[i]) * (levs[i] * WAVE_HEIGHT + BASE_RADIUS)); verts.push(vPos[i]); verts.push(Math.sin(angles[i]) * (levs[i] * WAVE_HEIGHT + BASE_RADIUS)); } // graphics replesentation var gr:Graphics = shape.graphics; gr.clear(); pers.fieldOfView = 100; pmtx.identity(); yr -= Math.sin(cnt / 200); xr += 0.5; pmtx.appendRotation(xr, Vector3D.X_AXIS); pmtx.appendRotation(yr, Vector3D.Y_AXIS); pmtx.appendTranslation(0, 0, pers.focalLength); pmtx.append(pers.toMatrix3D()); bugfix(pmtx); Utils3D.projectVectors(pmtx, verts, pVerts, uvts); cnt = (cnt + 1) % (256 * 10); for (i = 20; i < 254; i ++) { var r:uint = (cnt + i) % 256; var g:uint = (cnt + i + 12) % 256; var b:uint = (cnt+ i + 32) % 256; gr.lineStyle(0,r << 16 | g << 8 | b); if (i == 20) { gr.moveTo(pVerts[i * 2] + cx, pVerts[i * 2 + 1] + cy); } else { gr.curveTo(pVerts[i * 2] + cx, pVerts[i * 2 + 1] + cy, (pVerts[i * 2] + pVerts[i * 2 + 2]) / 2 + cx, (pVerts[i * 2 + 1] + pVerts[i * 2 + 3]) / 2 + cy); } } canvas.draw(shape, null, null, BlendMode.ADD); canvas.applyFilter(canvas,canvasRect,oPt,cMtx); canvas.applyFilter(canvas,canvasRect,oPt,blur); } private function bugfix(matrix:Matrix3D):void { var m1:Matrix3D = new Matrix3D(Vector.<Number>([ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 ])); var m2:Matrix3D = new Matrix3D(Vector.<Number>([ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 ])); m1.append(m2); if (m1.rawData[15] == 20) { var rawData:Vector.<Number> = matrix.rawData; rawData[15] /= 20; matrix.rawData = rawData; } } } }