//将创建的游戏对象添加到窗体中
public void AddGameObj(GameObj ob)//不确定要添加哪个对象，所以添加父类
{
if (ob is BackGround)
{
this.BG = ob as BackGround;
}
else if (ob is PlanePlayer) //判断传入对象是否是玩家飞机
{
this.PP = ob as PlanePlayer; //转换成玩家飞机，赋值给玩家属性
}
else if (ob is PlayerBullet) //添加玩家子弹
{
listPlayerBullet.Add(ob as PlayerBullet);
}
else if (ob is PlaneEnemy)//将ob对象赋值给PlaneEnemy,加载到敌人飞机的集合当中
{
listplaneEnemies.Add(ob as PlaneEnemy);
}
else if (ob is EnemyExplosion)//将ob对象赋值给 EnemyExplosio,加载到敌人飞机爆炸的集合当中
{
listenemyExplosions.Add(ob as EnemyExplosion);
}
else if (ob is EnemyBullet)
{
listenemyBullets.Add(ob as EnemyBullet);//添加敌人子弹到集合中
}
else if (ob is PlayerExplosion)
{
listplayerExplosions.Add(ob as PlayerExplosion);
}
else if (ob is Supplies)
{
listSupllies.Add(ob as Supplies);
}
else if (ob is Rocks)
{
listRocks.Add(ob as Rocks);
}
else if (ob is PlayerSkill)
{
listplayerSkill.Add(ob as PlayerSkill);
}
}