SpringDocument1 883108 forked:1favorite:2lines:66license : MIT License modified : 2010-03-14 23:33:08 Embed Tweet package { import flash.display.*; import flash.events.*; import flash.text.*; public class SpringDocument1 extends Sprite { private var _ball:Ball; private var _spring:Number = .1; private var _friction:Number = .9; private var _targetX:Number; private var _targetY:Number; private var _velocityX:Number = 0; private var _velocityY:Number = 0; public function SpringDocument1() { init(); } private function init():void { stage.scaleMode = StageScaleMode.NO_SCALE; stage.align = StageAlign.TOP_LEFT; var tex:TextField = new TextField ; addChild(tex); tex.width = 450; tex.x = tex.y = 10; tex.multiline = true; tex.text = 'ステージをクリックすると、ボールがバネ運動を開始します。\nその後はマウスにあわせてバネ運動を繰り返します。'; // ステージ上にスプライトを配置します。 addChild(_ball = new Ball); _ball.x = stage.stageWidth / 2; _ball.y = stage.stageHeight / 2; stage.addEventListener(MouseEvent.CLICK, clickHandler); } private function clickHandler($event:MouseEvent):void{ addEventListener(Event.ENTER_FRAME, enterFrameHandler); } private function enterFrameHandler($event:Event):void{ if(Math.abs(mouseX - _ball.x) < .5 && Math.abs(mouseY - _ball.y) < .5){ // 運動停止と看做してよい閾値に達している場合は何もせずに終了 return; } _targetX = mouseX; _targetY = mouseY; _velocityX += (_targetX - _ball.x) * _spring; _velocityX *= _friction; _velocityY += (_targetY - _ball.y) * _spring; _velocityY *= _friction; _ball.x += _velocityX; _ball.y += _velocityY; graphics.clear(); graphics.lineStyle(0); graphics.moveTo(mouseX, mouseY); graphics.lineTo(_ball.x, _ball.y); } } } import flash.display.Sprite; class Ball extends Sprite { private var _radius:Number = 10; function Ball(){ init(); } private function init():void{ graphics.beginFill(0x000000); graphics.lineStyle(0, 0x999999); graphics.drawCircle(0, 0, _radius); } public function get radius():Number{ return _radius; } } Code Fullscreen Preview Fullscreen okoi siouxcitizen.. mouseY mouseX Math.abs align multiline MouseEvent.CLICK addEventListener clear addChild width TextField MouseEvent text Event.ENTER_FRAME Event Sprite Number sort new page view favorite forked pv58 forked from: SpringDocument1 rafal forked:0 favorite:0lines:66 (diff:2)
