public static Missile ActivateMissile()
{
//ensure call Create() first
ShipMan pShipMan = ShipMan.GetInstance();
Debug.Assert(pShipMan != null);
// create Missile
Missile pMissile = new Missile(GameObject.Name.Missile, GameSprite.Name.Missile, 400, 100);
pShipMan.pMissile = pMissile;
// activate collision sprite and game sprite
pMissile.activateCollisionSprite(SpriteBatchMan.Find(SpriteBatch.Name.Boxes));
pMissile.activateGameSprite(SpriteBatchMan.Find(SpriteBatch.Name.Missiles));
// attach missile to missile group
GameObject pMissileGroup = GameObjectMan.Find(GameObject.Name.MissileGroup);
Debug.Assert(pMissileGroup != null);
// Add to GameObject
pMissileGroup.add(pShipMan.pMissile);
return(pShipMan.pMissile);
}