//构造函数
public PlaneEnemy(int ET, int x, int y, PlanePlayer PP) : base(GetImage(ET), x, y, GetHP(ET), GetSpeed(ET), Direction.Down) //方向向下,传入玩家飞机位置用于发射锁定子弹
{
this.EnemyType = ET; //给敌人类型赋值
planePlayer = PP;
r = new Random(x % 7);
AimToPlayer();
}
//调用父类构造函数
////需要确定子弹是哪个飞机发射的
////获取子弹的xy轴和高宽度，确定子弹要在飞机中前的位置发射
//飞机朝上子弹向上，飞机朝下，子弹向下
public Bullet(PlanePlayer pb, Image img, int speed, int power) : base(img.Width, img.Height, pb.X + pb.Width / 2, pb.Y + pb.Heigth / 2, 0, speed, pb._D)
{
this.imageBullet = img;
this.Power = power;
}
internal static Image imagePB = Resources.fire01;//导入玩家子弹图片
public PlayerBullet(PlanePlayer pb, int speed) : base(pb, GetImage(pb.BulletType), speed, 3)
{
}