forked from: マウスの回転を検出

by nbernaz 16 Jan 2012
Embed
/**
 * Copyright nbernaz ( http://wonderfl.net/user/nbernaz )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/zW7j
 */

// forked from keno42's マウスの回転を検出
package {
    import flash.display.Sprite;
    import flash.events.*;
    
    

    import flash.display.*;
 

    
    public class FlashTest extends Sprite {
            private var index:int = 0;
            private var stageXs:Array = [];
            private var stageYs:Array = [];
            private var wheel:Wheel = new Wheel();
            // マウスを右方向に回すとホイールが右回転、逆は左回転します。
        public function FlashTest() {
            // write as3 code here..
            init();
        }
        
        private function init():void{
                stageXs = [stage.mouseX, stage.mouseX];
                stageYs = [stage.mouseY, stage.mouseY];
                addChild(wheel);
                wheel.x = stage.stageWidth/2;
                wheel.y = stage.stageHeight/2;
                addEventListener(Event.ENTER_FRAME,onEnterFrame);
            stage.addEventListener(MouseEvent.MOUSE_MOVE, onMove);
        }
        private function onEnterFrame(e:Event):void{
                wheel.update();
        }
        private function onMove(e:MouseEvent):void{
                var lastIndex:int = index;
                var lastLastIndex:int = 1 - index;
                index = lastLastIndex;
                var rotZ:Number = 
                    (stageXs[lastIndex] - stageXs[lastLastIndex]) * (stage.mouseY - stageYs[lastIndex]) -
                    (stageYs[lastIndex] - stageYs[lastLastIndex]) * (stage.mouseX - stageXs[lastIndex]);
                stageXs[index] = stage.mouseX;
                stageYs[index] = stage.mouseY;
                
                wheel.rotAccel(rotZ*1.1);
        }
    }
}

import flash.display.Sprite;
class Wheel extends Sprite{
    private var num:int = 8;
    private var radius:Number = 200;
    private var rotSpeed:Number= 0;
    public function Wheel(){
        this.graphics.lineStyle(4);
        this.graphics.drawCircle(0, 0, radius);
      
        
        for( var i:int = 0; i < num; i++ ){
           
            this.graphics.moveTo(0,0);
              
            this.graphics.lineTo(radius * Math.cos((2*i/num)*Math.PI), radius * Math.sin((2*i/num)*Math.PI));
  
            
          
              
            
            
        }
        
        
        this.graphics.drawCircle(0, 0, radius);
    }
    public function rotAccel(power:Number):void{
        rotSpeed += power;
    }
    public function update():void{
        rotSpeed *= 0.09;
        this.rotation += rotSpeed;
    }
    
   }