flash on 2013-4-24

/**
 * Copyright cjcat2266 ( http://wonderfl.net/user/cjcat2266 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/qaP9
 */

package

{

  import flash.display.Sprite;

  import flash.events.Event;

  import flash.events.MouseEvent;

  import flash.geom.Point;

    

  public class Main extends Sprite

  {

    // problem inputs

    private static const PLANET_RADIUS     :Number = 100.0;

    private static const MAX_MISSILE_HEIGHT:Number = 50.0;

    

    // simulation phase

    private static const PHASE_AIM  :uint = 0;

    private static const PHASE_SHOOT:uint = 1;

    private var phase_:uint = PHASE_AIM;

    

    // object positions

    private var planet_:Point;

    private var turret_:Point;

    private var target_:Point;

    

    // simulation variables

    private var turretAngle_:Number;

    private var time_       :Number;

    

    public function Main()

    {

      stage.addEventListener(Event.ENTER_FRAME, render);

      stage.addEventListener(MouseEvent.CLICK, onClick);

      stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);

    }

    

    private function render(e:Event):void

    {

      // get planet position

      planet_ = new Point(0.5 * stage.stageWidth, 0.5 * stage.stageHeight);

      

      // draw planet at the center of the stage

      graphics.lineStyle(0, 0x000000);

      graphics.drawCircle(planet_.x, planet_.y, PLANET_RADIUS);

    }

    

    private function onClick(e:MouseEvent):void

    {

      // early out

      if (phase_ != PHASE_AIM)

        return;

      

      time_  = 0.0;

      phase_ = PHASE_SHOOT;

    }

    

    private function onMouseMove(e:MouseEvent):void

    {

      // calculate closest point on the planet

      

    }

  }

}