// forked from okoi's flash on 2010-3-11 package { import flash.display.Sprite; import flash.display.MovieClip import flash.display.Sprite; import flash.display.Graphics; import flash.events.Event; import flash.events.MouseEvent; import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.BlendMode; public class FlashTest extends Sprite { var pathMC:MovieClip = new MovieClip(); var pathlist:Array = new Array(); var drawBMPData:BitmapData; var drawBMP:Bitmap; var drawMC:MovieClip = new MovieClip(); var drawFlag:Boolean = false; public function FlashTest() { // write as3 code here.. if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, init); // entry point // BackGround var g:Graphics = graphics; g.beginFill( 0x000000 ); g.drawRect( 0, 0, stage.stageWidth, stage.stageHeight ); // addMC addChild(pathMC); drawBMPData = new BitmapData( stage.stageWidth, stage.stageHeight, true, 0x00000000 ); drawBMP = new Bitmap(drawBMPData); addChild(drawBMP); // CreatePath var p:Path = new Path(); for ( var i:int = 0; i < 200; i++ ) { p = new Path(); p.Init(0, 0, 5 + (i/20), 0.5, 50); pathlist.push(p); } addEventListener(Event.ENTER_FRAME, EnterFrame); stage.addEventListener(MouseEvent.MOUSE_DOWN, ChangeDrawFlag ); stage.addEventListener(MouseEvent.MOUSE_UP, ChangeDrawFlag ); } public function EnterFrame(event:Event):void { // DrawPath var g:Graphics = pathMC.graphics; g.clear(); g.beginFill( 0xFFFFFF, 1 ); //g.lineStyle (10, 0x000000, 1.0); // 線のスタイル for each ( var p:Path in pathlist ) { // マウスの位置更新 p.SetMousePos( stage.mouseX, stage.mouseY ); if( !drawFlag ) g.drawCircle( p.point.x, p.point.y, 1 ); } // 描画処理 if ( drawFlag ) { g = drawMC.graphics; g.clear(); for ( var i:int = 0; i < pathlist.length - 1; i++ ) { g.lineStyle (1, pathlist[i].color, 0.1); // 線のスタイル g.moveTo( pathlist[i].prev.x, pathlist[i].prev.y ); g.lineTo( pathlist[i].point.x, pathlist[i].point.y ); } // 書いたデータをビットマップに追加 drawBMPData.draw( drawMC, null, null, BlendMode.ADD ); } } public function ChangeDrawFlag(event:MouseEvent):void { if ( drawFlag ) drawFlag = false; else drawFlag = true; //var color:Array = [0xFF0000 , 0xFFFF00 , 0x00FF00 , 0x00FFFF , 0x0000FF]; var colorMax:uint = 0xFFFF; var colorMin:uint = 0xFF00; for ( var i:int = 0; i < pathlist.length - 1; i++ ) { pathlist[i].color = 0xFF0000 + 0xFF00 * (i/(pathlist.length-1)); } } } } import flash.display.MovieClip; import flash.events.Event; import flash.geom.Point; internal class Path extends MovieClip { var prev:Point = new Point(); var point:Point = new Point(); var mouse:Point = new Point(); var move:Point = new Point(); var accele:Number = 1; var slowdown:Number = 1; var maxspeed:Number = 1; var color:uint; public function Path() { super(); addEventListener(Event.ENTER_FRAME, EnterFrame ); } /** * * @param x * @param y * @param accele マウスから離れて行く時の加速値 * @param _effect */ public function Init(x:int = 0, y:int = 0, _accele:Number = 1, _slowdown:Number = 1, _maxspeed:Number = 20):void { prev.x = point.x = x; prev.y = point.y = y; move.x = 0; move.y = 0; accele = _accele; slowdown = _slowdown; maxspeed = _maxspeed; } public function SetMousePos(x:int, y:int):void { mouse.x = x; mouse.y = y; } public function EnterFrame(event:Event):void { prev.x = point.x; prev.y = point.y; // マウスとの距離を出す // そこから影響係数を掛けて移動力を出す var nowLen:Number = Math.sqrt( (mouse.x - prev.x) * (mouse.x - prev.x) + (mouse.y - prev.y) * (mouse.y - prev.y) ); //var power:Number = len * power; var rad:Number = Math.atan2((mouse.y - point.y), (mouse.x - point.x)); /* move.x /= 0.5; move.y /= 0.5; var rate:Number = 1 - (len / 100); if ( rate < 0 ) rate = 0; var power:Number = 1 + rate * 10; //if ( 100 - len > 0 ) rate = (100-len)/10; power = 1; move.x += Math.cos( rad ) * power; move.y += Math.sin( rad ) * power; */ move.x += Math.cos( rad ) * accele; move.y += Math.sin( rad ) * accele; // 移動速度、角度算出 // あまりにも速度が大きくなったら正規化する var moveS:Number = Math.sqrt( move.x * move.x + move.y * move.y ); var moveR:Number = Math.atan2(move.y, move.x); if ( moveS >= maxspeed ) { move.x = Math.cos( moveR ) * maxspeed; move.y = Math.sin( moveR ) * maxspeed; } point.x += move.x; point.y += move.y; // 離れていってる時ならスピード減衰 var nextLen:Number = Math.sqrt( (mouse.x - point.x) * (mouse.x - point.x) + (mouse.y - point.y) * (mouse.y - point.y) ); if ( nowLen < nextLen ) { move.x *= slowdown; move.y *= slowdown; } } }