forked from: 【練習】バルーンファイト的な動き？

/**
 * Copyright marcsali ( http://wonderfl.net/user/marcsali )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/o0aS
 */

// forked from Tamanegi_kenshi's 【練習】バルーンファイト的な動き？
package{
    import flash.accessibility.Accessibility;
 import flash.display.Sprite;
 import flash.events.Event;
 import flash.events.KeyboardEvent;
 import flash.ui.Keyboard; 
 import flash.display.Shape; 
 
 public class test extends Sprite{
   private var ball:Sprite;
   private var sen:Shape;
   private var maru:Shape;
   private var vx:Number  =0;
   private var vy:Number  =0;
   private var ax:Number =0;
   private var ay:Number =0;
   private var gravity:Number =0.03;
 
   
   public function test(){
       init();
       }
   private function init():void{
       ball =new Sprite();
       with(ball.graphics){
           beginFill(0xff0000);
           drawEllipse(0,0,50,20);
           ball.x =0;
           ball.y = stage.stageHeight/2;
           
           endFill();
       }
       sen =new Shape();
       with(sen.graphics){
           lineStyle(1);
           moveTo(0,400);
           lineTo(stage.stageHeight,400);
           }
           
       maru =new Shape();
       with(maru.graphics){
           beginFill(0xff0000);
           drawCircle(25,5,10);
           endFill();
           }
       
       ball.addChild(maru);
       addChild(sen);
       addChild(ball);
       addEventListener(Event.ENTER_FRAME,onEnterFrame);
       stage.addEventListener(KeyboardEvent.KEY_DOWN,down);
       stage.addEventListener(KeyboardEvent.KEY_UP,up);
       
       }
     private function onEnterFrame(event:Event):void{
             if(ball.y >380){
         
         
         ball.y =380;
         vy*=-1*0.5;
         vx*=0.9;
         ax=ay=0;
         }
     
         
         ball.x +=vx;
         ball.y +=vy;
         vx +=ax;
         vy +=ay;
         vy +=gravity;
 }
 private function down(event:KeyboardEvent):void{
 
     switch(event.keyCode){
         case Keyboard.LEFT:
             ax =-0.1;
             break;
             case Keyboard.RIGHT:
             ax =0.1;
             break;
             case Keyboard.DOWN:
             ay =0.1;
             break;
             case Keyboard.UP:
             ay=-0.1;
             break;
         case Keyboard.SPACE:
             ball.x=stage.stageHeight/2;
             ball.y=380 ;
             vx=vy=0;
             break;
     }                
     }
      private function up(event:KeyboardEvent):void{
          ax=ay=0;
     }
     
 
 
 }     
}