// 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 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; 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 forceMap: BitmapData; private var forceCache: Array; 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 cnt:int = 0; //forcemap を getPixel で計算すると重いので、色はキャッシュする。 private var forceVector:Vector.<int>; 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); forceMap = new BitmapData(mw, mh, false); 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()*0.2 + 0.9) * 0.003; prev.next = p; prev = p; } colorTr = new ColorTransform(1, 1, 1, 1, -20, -20, -20); change(); } // 描画、マウスの判定を後で追加予定 public function draw(mouseX: Number, mouseY: Number): void { cnt++; if(cnt>100){ change(); cnt = 0; } var p: Particle = particles; var col: uint; var forceIndex:int; bmpData.lock(); bmpData.colorTransform(bmpData.rect, colorTr); while ((p = p.next) != null) { forceIndex = (p.y>>2) * mw + (p.x>>2); //2万個以上はパーティクルの座標が重なった場合の対策をしないと、 //まったく同じ動きをするので意味がないので p.rndに乱数を持たせて、力に揺らぎを与える。 p.vx = p.vx * 0.99 + fxVector[forceIndex] * p.rnd; p.vy = p.vy * 0.99 + fyVector[forceIndex] * p.rnd; p.x += p.vx; p.y += p.vy; if (p.x < 0) p.x += w; else if (p.x >= w) p.x -= w; if (p.y < 0) p.y += h; else if (p.y >= h) p.y -= h; bmpData.setPixel(p.x >> 0, p.y >> 0, p.col); } 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。 */ forceMap.perlinNoise(128, 128, 8, Math.random() * 0xFFFF, false, true, 7, false); if(!forceVector){ fxVector = new Vector.<int>(mw*mh,true); fyVector = new Vector.<int>(mw*mh,true); } //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 col:int= Math.random()*256*256*256; public var next: Particle; public function Particle() { } }