// forked from fladdict's 250000 particle flow shimulation // forked from fladdict's 20万個ぱーてぃくる 途中で飽きたけど 25万個は狙えるはず // forked from beinteractive's forked from: 10万個ぱーてぃくる - 軽く高速化 // forked from bkzen's 10万個ぱーてぃくる /* http://www.be-interactive.org/index.php?itemid=458 ↓ http://blog.joa-ebert.com/2009/04/03/massive-amounts-of-3d-particles-without-alchemy-and-pixelbender/ ↓ http://www.joa-ebert.com/files/swf/pure/Main.as の流れでBitmapData.setVector */ package { import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.events.MouseEvent; import net.hires.debug.Stats; /** * なんかいっぱい動かすテスト * 洗濯機みたいになってます。 * @author jc at bk-zen.com */ [SWF(backgroundColor = "0x000000", frameRate = "30")] public class Test3 extends Sprite { protected const NUM_OF_PARTICLES: int = 250000; private var main: TestMain; public function Test3() { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, init); // main = new TestMain(stage.stageWidth, stage.stageHeight, NUM_OF_PARTICLES); addChild(main.view); addChild(new Stats()); stage.scaleMode = StageScaleMode.NO_SCALE; stage.align = StageAlign.TOP_LEFT; stage.addEventListener(Event.RESIZE, onResize); stage.addEventListener(MouseEvent.CLICK, onClick); addEventListener(Event.ENTER_FRAME, onEnter); } private function onClick(e:MouseEvent):void { main.change(); } private function onEnter(e:Event):void { main.draw(mouseX, mouseY); } // りサイズ （未実装） private function onResize(e:Event):void { main.resize(stage.stageWidth, stage.stageHeight); } } } import flash.display.Bitmap; import flash.display.BitmapData; import flash.geom.ColorTransform; import flash.geom.Point; import flash.utils.ByteArray; import __AS3__.vec.Vector; class TestMain { private var w: int; private var h: int; private var mw: int; private var mh: int; public var view: Bitmap; private var bmpData: BitmapData; private var buffer: Vector.<uint>; private var forceMap: BitmapData; private var randomSeed: int; private var particles: Particle; private var num: int; private var color: uint = 0xF0F0FF; private var count: int = 0; private var colorTr: ColorTransform; private var fxVector:Vector.<int>; private var fyVector:Vector.<int>; public function TestMain(w: int, h: int, numOfParticles: int) { this.w = w; mw = w >> 1; this.h = h; mh = h >> 1; bmpData = new BitmapData(w, h, false, 0x00000000); buffer = new Vector.<uint>(w * h, true); forceMap = new BitmapData(mw, mh, false); forceMap.perlinNoise(mw >> 1, mh >> 1, 4, Math.random() * 0xFFFF, false, true, 3); view = new Bitmap(bmpData); num = numOfParticles; var i: int; var prev: Particle = particles = new Particle(); var p: Particle; while (++i <= num) { p = new Particle(); p.x = Math.random() * w; p.y = Math.random() * h; p.rnd = Math.random() * 0.003 + 0.003; prev.next = p; prev = p; } colorTr = new ColorTransform(1, 1, 1, 1, -32, -16, -16); fxVector = new Vector.<int>(mw * mh, true); fyVector = new Vector.<int>(mw * mh, true); change(); } // 描画、マウスの判定を後で追加予定 public function draw(mouseX: Number, mouseY: Number): void { var b: Vector.<uint> = buffer; var p: Particle = particles; var fx: Vector.<int> = fxVector; var fy: Vector.<int> = fyVector; var c: uint; var fi: uint; var bi: uint; var rnd: Number; var n: int = b.length; while (--n > -1) b[n] = 0; while ((p = p.next) != null) { fi = (p.y >> 2) * mw + (p.x >> 2); rnd = p.rnd; p.x += (p.vx = p.vx * 0.96 + fx[fi] * rnd); p.y += (p.vy = p.vy * 0.96 + fy[fi] * rnd); (p.x < 0) ? p.x += w : (p.x >= w) ? p.x -= w : 0; (p.y < 0) ? p.y += h : (p.y >= h) ? p.y -= h : 0; bi = (p.y >> 0) * w + (p.x >> 0); b[bi] = ((c = b[bi] + 0x303030) > 0xffffff) ? 0xffffff : c; } bmpData.lock(); bmpData.setVector(bmpData.rect, b); bmpData.unlock(); } public function change(): void { /** この処理は重いので、本当は次のforcemapの生成をバックグラウンドで少しづつ行って、完成したら切り替えるようにする。 */ var base: uint = 32 * (Math.random() * 2 + 1); forceMap.perlinNoise(base, base, 4, Math.random() * 0xFFFF, false, true, 7); //force mapをキャッシュする for(var yy:int = 0; yy < mh; yy++){ for(var xx:int = 0; xx < mw; xx++){ var col:int = forceMap.getPixel(xx, yy); var pos:int = yy * mw + xx; fxVector[pos] = (col >> 16 & 0xff) - 128; fyVector[pos] = (col >> 8 & 0xff) - 128; } } } public function resize(w: Number, h: Number): void { this.w = w; this.h = h; if (bmpData) { bmpData.dispose(); } bmpData = new BitmapData(w, h, false, 0x00000000); view.bitmapData = bmpData; } } class Particle { public var x: Number = 0; public var y: Number = 0; public var vx: Number = 0; public var vy: Number = 0; public var rnd: Number = 0; public var next: Particle; public function Particle() { } }