让敌人跟着你

如何解决让敌人跟着你

我试图让敌人跟随由鼠标移动的玩家。玩家生成但不移动。这是我的（新的和编辑过的）代码： 这是播放器类（没问题）：

class Player(pg.sprite.Sprite):
def __init__(self):
    self.groups = all_sprites
    pg.sprite.Sprite.__init__(self,self.groups)
    self.image = pg.Surface((Player_SIZE,Player_SIZE))
    self.image.fill(BLUE)
    self.rect = self.image.get_rect()
    self.pos = vec(randint(0,WIDTH),randint(0,HEIGHT))
    self.vel = vec(MAX_SPEED,0).rotate(uniform(0,360))
    self.acc = vec(0,0)
    self.rect.center = self.pos

def follow_mouse(self):
    mpos = pg.mouse.get_pos()
    self.acc = (mpos - self.pos).normalize() * 0.5

def seek(self,target):
    self.desired = (target - self.pos).normalize() * MAX_SPEED
    steer = (self.desired - self.vel)
    if steer.length() > MAX_FORCE:
        steer.scale_to_length(MAX_FORCE)
    return steer

def seek_with_approach(self,target):
    self.desired = (target - self.pos)
    dist = self.desired.length()
    self.desired.normalize_ip()
    if dist < APPROACH_RADIUS:
        self.desired *= dist / APPROACH_RADIUS * MAX_SPEED
    else:
        self.desired *= MAX_SPEED
    steer = (self.desired - self.vel)
    if steer.length() > MAX_FORCE:
        steer.scale_to_length(MAX_FORCE)
    return steer

def update(self):
    # self.follow_mouse()
    self.acc = self.seek_with_approach(pg.mouse.get_pos())
    # equations of motion
    self.vel += self.acc
    if self.vel.length() > MAX_SPEED:
        self.vel.scale_to_length(MAX_SPEED)
    self.pos += self.vel
    if self.pos.x > WIDTH:
        self.pos.x = 0
    if self.pos.x < 0:
        self.pos.x = WIDTH
    if self.pos.y > HEIGHT:
        self.pos.y = 0
    if self.pos.y < 0:
        self.pos.y = HEIGHT
    self.rect.center = self.pos
 

这是敌人类：

class Enemy(pg.sprite.Sprite):
def __init__(self):
    self.groups = all_sprites
    pg.sprite.Sprite.__init__(self,Player_SIZE))
    self.image.fill(RED)
    self.rect = self.image.get_rect()
    self.pos = vec(randint(0,HEIGHT))
    self.vel = vec(MAX_SPEED1,0)
    self.rect.center = self.pos

def follow_player1(self):
    ppos = self.pos.x,self.pos.y
    self.acc = (ppos - self.pos).normalize() * 0.5

def seek1(self,target):
    self.desired = (ppos - self.pos).normalize() * MAX_SPEED1
    steer = (self.desired - self.vel)
    if steer.length() > MAX_FORCE1:
        steer.scale_to_length(MAX_FORCE1)
    return steer

def seek_with_approach1(self,target):
    self.desired = (ppos - self.pos)
    dist = self.desired.length()
    self.desired.normalize_ip()
    if dist < APPROACH_RADIUS:
        self.desired *= dist / APPROACH_RADIUS * MAX_SPEED1
    else:
        self.desired *= MAX_SPEED1
    steer = (self.desired - self.vel)
    if steer.length() > MAX_FORCE1:
        steer.scale_to_length(MAX_FORCE1)
    return steer

def update1(self):
    # self.follow_mouse()
    self.acc = self.seek_with_approach(ppos)
    # equations of motion
    self.vel += self.acc
    if self.vel.length() > MAX_SPEED1:
        self.vel.scale_to_length(MAX_SPEED1)
    self.pos += self.vel
    if self.pos.x > WIDTH:
        self.pos.x = 0
    if self.pos.x < 0:
        self.pos.x = WIDTH
    if self.pos.y > HEIGHT:
        self.pos.y = 0
    if self.pos.y < 0:
        self.pos.y = HEIGHT
    self.rect.center = self.pos

这是主循环（游戏循环，它没有问题......我认为）：

#Main loop
all_sprites = pg.sprite.Group()
Player()
Enemy()
paused = False
running = True
while running:
    clock.tick(FPS)
    for event in pg.event.get():
        if event.type == pg.QUIT:
            running = False
               

    if not paused:
        all_sprites.update()

    screen.fill(DARKGRAY)
    all_sprites.draw(screen)

    pg.display.flip()

pg.quit()

如果我改变了任何戏剧性的东西，我将编辑代码。 提前致谢