ThrowBall ~ Louis: Research + Portfolio


package  
{
 import flash.display.Sprite;
 import flash.geom.Rectangle;
 import flash.events.MouseEvent;
 import flash.events.Event;
 
 public class ThrowBall extends Sprite
 {
  private var radius : int = 15;
  private var rect : Rectangle = new Rectangle(0+radius, 0+radius, 800-radius, 500-radius);
  private var ball : Sprite;
  private var currentX:Number;
  private var currentY:Number;
  private var lastX:Number;
  private var lastY:Number;
  private var drag :Boolean = false;
  private var vx : Number = 0;
  private var vy : Number = 0;
  private var tempWall : Sprite;
  
  public function ThrowBall() 
  {
   createBall();
   createWall();
   stage.addEventListener(Event.ENTER_FRAME, onenterframe);
   stage.addEventListener(MouseEvent.MOUSE_UP, onmouseup);
  }
  private function createBall() :void {
   ball = new Sprite();
            ball.graphics.beginFill(0xFF0000);
            ball.graphics.drawCircle(0, 0, radius);
            ball.graphics.endFill();
   ball.buttonMode = true;
   ball.x = rect.width / 2 + radius/2;
   ball.y = rect.height / 2 + radius/2;
   ball.addEventListener(MouseEvent.MOUSE_DOWN, onmousedown);
   addChild(ball);
  }
  private function onmousedown (e:MouseEvent):void {
   ball.startDrag(false, rect);
   drag = true;
  }
  private function onmouseup(e:MouseEvent):void {
   ball.stopDrag();
   drag = false;   
  }
  private function onenterframe(e:Event):void {
   if (drag) {
    lastX = currentX;
    lastY = currentY;
    currentX = mouseX;
    currentY = mouseY;
    vx = currentX - lastX;
    vy = currentY - lastY;
   }
   else {
    ball.x += vx;
    ball.y += vy;
   }
   if (ball.x <= rect.x+radius)
   {
    ball.x = rect.x+radius;
    vx *= -1;
   }
   else if (ball.x >= rect.width-radius)
   {
    ball.x = rect.width-radius;
    vx *= -1;
   }
   else if (ball.y >= rect.height-radius)
   {
    ball.y = rect.height - radius;
    vy *= -1;
   }
   else if (ball.y <=rect.y+radius)
   {
    ball.y = rect.y+radius;
    vy *= -1;
   }
   vx *= 0.95;
   vy *= 0.95;
  }
  private function createWall():void {
   for (var i = 0; i < 2; i++)
   {
    var wall :Sprite = new Sprite ();
    wall.graphics.beginFill(0xFF0000);
    wall.graphics.drawRect(0, 0, 800, radius);
    wall.graphics.endFill();
    if ( i == 1 ) wall.y = 500 - radius;
    addChild(wall);
   }
   for (var j = 0; j < 2; j++)
   {
    var sideWall :Sprite = new Sprite();
    sideWall.graphics.beginFill(0xFF0000);
    sideWall.graphics.drawRect(0, 0, radius, 500);
    sideWall.graphics.endFill();
    if ( j == 1 ) sideWall.x = 800 - radius;
    addChild(sideWall);
   }
  }
 }
}