//マウスでクリック。 //重力シミュレータ？ //なんかやってく内にエネルギー弾みたいになった package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.Sprite; import flash.events.Event; import flash.events.MouseEvent; import flash.geom.ColorTransform; import flash.geom.Rectangle; import net.hires.debug.Stats; public class Main extends Sprite { private static const WIDTH:Number = 462; private static const HEIGHT:Number = 462; private static const PARTICLE_CONT:Number = 3000; private var _canvas:BitmapData; private var _particles:Vector.<Particle>; public function Main():void { Wonderfl.capture_delay(5); _canvas = new BitmapData(WIDTH, HEIGHT,false,0x000000); var bitmap:Bitmap = new Bitmap(_canvas); addChild(bitmap); _particles = new Vector.<Particle>(PARTICLE_CONT, true); for (var i:uint = 0; i < PARTICLE_CONT; i++) { var p:Particle = new Particle(Math.random() * WIDTH, Math.random() * HEIGHT, Math.random() * 0xFFFFFF); var radian:Number = Math.random() * Math.PI * 2; var speed:Number = Math.random(); p.vx = Math.cos(radian)*speed; p.vy = Math.sin(radian)*speed; _particles[i] = p; } addEventListener(Event.ENTER_FRAME, update); addChild(new Stats()); _gravitys = new Vector.<Particle>(); stage.addEventListener(MouseEvent.CLICK, onClick); } private function onClick(e:MouseEvent):void { var g:Particle = new Particle(stage.mouseX, stage.mouseY); _gravitys.pop(); _gravitys.push(g); } private var _gravitys:Vector.<Particle>; private function update(e:Event):void { _canvas.lock(); _canvas.colorTransform(new Rectangle(0, 0, WIDTH, HEIGHT), new ColorTransform (0.9, 0.9, 0.9)); //var mouseX:Number = stage.mouseX; //var mouseY:Number = stage.mouseY; for each(var og:Particle in _gravitys) { //og.x = stage.mouseX; og.x ++; //og.y = stage.mouseY; } for each(var p:Particle in _particles) { for each(var gp:Particle in _gravitys) { var dx:Number = gp.x - p.x; var dy:Number = gp.y - p.y; var g:Number = 70; if(true){ var rr:Number = dx * dx+ dy * dy; if (rr > 0 && rr < 5000/g) { rr = 5000/g; } else if (rr < 0 && rr > -5000 / g) { rr = -5000/g; } var theta:Number = Math.atan2(dy, dx); p.vx += Math.cos(theta) * 1 / rr * g; p.vy += Math.sin(theta) * 1 / rr * g; } } p.vx *= 0.99; p.vy *= 0.99; p.x += p.vx; p.y += p.vy; if (p.x < 0) { p.x = WIDTH; } else if (p.x > WIDTH) { p.x = 0; } if (p.y < 0) { p.y = HEIGHT; } else if (p.y > HEIGHT) { p.y = 0; } var speed:Number = p.vx * p.vx + p.vy * p.vy; var color:uint; if (speed > 4) { color = 0x00FFFF; } else { color = (((speed / 4 * 0xFF) & 0xFF) << 8) | 0x0000FF; } _canvas.setPixel(p.x, p.y, color); } _canvas.unlock(); } } } class Particle { public var x:Number; public var y:Number; public var color:uint; public var vx:Number = 0; public var vy:Number = 0; public function Particle(x:Number = 0, y:Number = 0,color:uint = 0xFFFFFF) { this.x = x; this.y = y; this.color = color; } }