Box2D for Flash Games

Shooting the physics bird

We need to add some more lines to the birdRelease function:

private function birdRelease(e:MouseEvent):void {
  var distanceX:Number=theBird.x-slingX;
  var distanceY:Number=theBird.y-slingY;
  var velocityX:Number=distanceX*-1/5;
  var velocityY:Number=distanceY*-1/5;
  var birdVelocity:b2Vec2=new b2Vec2(velocityX,velocityY);
  var sphereX:Number=theBird.x/worldScale;
  var sphereY:Number=theBird.y/worldScale;
  var r:Number = 15/worldScale;
  var bodyDef:b2BodyDef=new b2BodyDef();
  bodyDef.position.Set(sphereX,sphereY);
  bodyDef.type=b2Body.b2_dynamicBody; var circleShape:b2CircleShape=new b2CircleShape(r); var fixtureDef:b2FixtureDef=new b2FixtureDef(); fixtureDef.shape=circleShape; fixtureDef.density=4; fixtureDef.restitution=0.4; ...