forked from: 線がうまく描けません（Math Graphics Example）

上下で角速度
左右で半径が変わるようにしてみたよ

by undo 21 Oct 2010

• Forked from mousepancyo's 線がうまく描けません（Math Graphics Example）
• Diff: 16
• Related works: 2
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/**
 * Copyright undo ( http://wonderfl.net/user/undo )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/rfBS
 */

// forked from mousepancyo's 線がうまく描けません（Math Graphics Example）
/*
 *上下で角速度
 *左右で半径が変わるようにしてみたよ
 */
package  {
    import flash.display.Sprite;
    import flash.geom.Point;
    import flash.events.Event;
    import flash.display.Sprite;
    import flash.events.MouseEvent;
    
    [SWF(frameRate=60)]
    public class Main extends Sprite{
        
        private var rotObj:Sprite = new RotObj();
        private var _r:Number;
        private var _rad:Number;
        private var _radius:Number;
        private var _centerX:Number = stage.stageWidth / 2;
        private var _centerY:Number = stage.stageHeight / 2;
        private var _p:Point = new Point(_centerX, _centerY);
        private var _isMouseDown:Boolean;
        
       [SWF(width="465", height="465", backgroundColor="0xFFFFFF", frameRate="60")]
        public function Main() {
            addChild(rotObj);
            rotObj.x = _centerX;
            rotObj.y = _centerY;
            stage.addEventListener(MouseEvent.MOUSE_DOWN, onDown);
            stage.addEventListener(MouseEvent.MOUSE_UP, onUp);
            graphics.lineStyle(1, 0);
            //
            Wonderfl.capture_delay(10);
        }
        
        private function update(e:Event):void{
            var mPoint:Point = new Point(mouseX, mouseY);
            var cPoint:Point = new Point(_centerX, _centerY);
            rotObj.rotation += (mPoint.y - cPoint.y) * 0.05;
            _r = rotObj.rotation;
            _rad = _r * Math.PI / 180;
            
            if(_isMouseDown){
                _p.x = _centerX + Math.cos(_rad) * (mPoint.x - cPoint.x);
                _p.y = _centerY + Math.sin(_rad) * (mPoint.x - cPoint.x);
                graphics.lineTo(_p.x, _p.y);
            }
        }
        
        private function onDown(e:MouseEvent):void{
            _isMouseDown = true;
            var rad:Number = Math.atan2(mouseY - _centerY, mouseX - _centerX);
            _p.x = _centerX + Math.cos(rad) * (mouseX - _centerX);
            _p.y = _centerY + Math.sin(rad) * (mouseX - _centerX);
            rotObj.rotation = rad * 180 / Math.PI;
            //
            graphics.moveTo(_p.x, _p.y);
            addEventListener(Event.ENTER_FRAME, update);
        }
        private function onUp(e:MouseEvent):void{
            _isMouseDown = false;
            graphics.clear();
            graphics.lineStyle(1, 0);
            graphics.moveTo(_p.x, _p.y);
            removeEventListener(Event.ENTER_FRAME, update);
            rotObj.rotation = 0;
        }
    }
}

import flash.display.Sprite;
class RotObj extends Sprite{
    public function RotObj() {
        this.graphics.lineStyle(1, 0x990000);
        graphics.moveTo(0, 0);
        graphics.lineTo(-10, 0);
        graphics.moveTo(0, 0);
        graphics.lineTo(0, -10);
        graphics.moveTo(0, 0);
        graphics.lineTo(10, 0);
        graphics.moveTo(0, 0);
        graphics.lineTo(0, 10);
    }
}