// forked from keno42's forked from: 重力＋パーティクル 円盤状 // forked from keno42's 重力＋パーティクル package { import flash.display.Sprite; import flash.events.Event; import flash.display.Bitmap; import flash.display.BitmapData; import flash.events.MouseEvent; import flash.filters.BlurFilter; import flash.filters.ColorMatrixFilter; import flash.filters.GlowFilter; import flash.geom.Matrix; import flash.geom.Point; [SWF(width = "465", height = "465", backgroundColor = "0", fps = "30")] public class Particles extends Sprite { private var NUM:int = 300; private var p:Particle = new Particle(); private var bd:BitmapData = new BitmapData(465, 465,true,0); private var m:Matrix = new Matrix(1, 0, 0, 1,0,0); public function Particles() { // take a capture after 10 sec Wonderfl.capture_delay( 10 ); var bmp:Bitmap = new Bitmap(bd); bd.fillRect(bd.rect, 0); addChild(bmp); for ( var i:int = 0; i < NUM; i++ ) { var next:Particle = p; p = new Particle(); p.next = next; addChild( p ); } addEventListener(Event.ENTER_FRAME, onEnterFrame); stage.addEventListener(MouseEvent.MOUSE_DOWN, onDown); stage.addEventListener(MouseEvent.MOUSE_UP, onUp); stage.addEventListener(Event.MOUSE_LEAVE, onUp); } private var isDown:Boolean = false; private function onDown(e:MouseEvent):void { isDown = true; } private function onUp(e:Event):void { isDown = false; } private function onEnterFrame(e:Event):void { if ( !stage ) return; var current:Particle = this.p; var p:Point = isDown?new Point(stage.mouseX, stage.mouseY):null; do{ current.update(p); } while ( current = current.next ) bd.lock(); bd.applyFilter(bd, bd.rect, new Point(), new ColorMatrixFilter([ 0.9994, 0, 0, 0, 0, 0, 0.9994, 0, 0, 0, 0, 0, 0.9994, 0, 0, 0, 0, 0, 0.9994, 0, ])); bd.draw(stage); bd.applyFilter(bd, bd.rect, new Point(), new BlurFilter(4, 4, 2)); bd.unlock(); } } } import flash.display.*; import flash.geom.Point; class Particle extends Sprite { public var next:Particle; private var vx:Number; private var vy:Number; private var vz:Number; public function Particle() { graphics.beginFill(0x8888| 0xFFFFFF * Math.random(), 1); graphics.drawRect(-1, -1, 2, 2); init(); } private function init():void{ var theta:Number = Math.random() * Math.PI * 2; var phi:Number = Math.random() * Math.PI; phi = - Math.PI * 0.35; // x,y,z: 初期位置の単位ベクトル var x:Number = Math.cos(theta); // 最初から x を使うとなにかおかしい var y:Number = Math.sin(theta) * Math.cos(phi); var z:Number = Math.sin(theta) * Math.sin(phi); // px, py, pz: ランダム速度 var px:Number = Math.random() - 0.5; var py:Number = Math.random() - 0.5; var pz:Number = Math.random() - 0.5; // i: 速度の原点方向の成分の大きさ var i:Number = px * x + py * y + pz * z; px -= i * x; py -= i * y; pz -= i * z; // i: ジャイロの軸方向の成分の大きさ i = py * Math.sin(phi) - pz * Math.cos(phi); py -= i * Math.sin(phi); pz += i * Math.cos(phi); var p:Number = 1 / Math.sqrt(px * px + py * py + pz * pz); px *= p; py *= p; pz *= p; // px, py, pz: 正規化完了 if ( (x * py - y * px) > 0 ) { // 座標と進行方向の外積のz座標 px *= -1; py *= -1; pz *= -1; } // 向きを揃えた var r:Number = 130+Math.random() * Math.random()*130; // 初期半径 var v:Number = Math.sqrt(r)*0.185; // 初期速度 this.x = 232 + r * x; // 232:wonderfl的中心座標 this.y = 200 + r * y; this.z = r * z; vx = px * v; vy = py * v; vz = pz * v; this.blendMode = "add"; } public function update(p:Point):void { x += vx; y += vy; z += vz; if ( !p ) p = new Point(232, 200); var px:Number = x - p.x; var py:Number = y - p.y; var r:Number = 1000 / Math.pow(px*px+py*py+z*z,1.5); vx -= px * r; vy -= py * r; vz -= z * r; if( x > 1465 || x < -1000 ){ init(); } } }