Question

我正在Pygame制作一款游戏，要求玩家从攻击它的外星人身上捍卫地球。使用箭头键控制播放器，并使用空格键进行拍摄。到目前为止，除激光器外，一切工作正常。当我发射激光时，我希望它们朝着玩家面向的方向移动。

这是我的lazer课程：

class lazer(pygame.sprite.Sprite):
    def __init__(self):
        super(lazer, self).__init__()
        self.image = pygame.image.load('lazer.png')
        self.rect = self.image.get_rect()
    def update1(self):
        keyy = pygame.key.get_pressed()
        speed = 30
        if keyy[pygame.K_UP]:
            self.rect.y -= speed 
        elif keyy[pygame.K_DOWN]:
            self.rect.y += speed
        if keyy[pygame.K_RIGHT]:
            self.rect.x += speed
        elif keyy[pygame.K_LEFT]:
            self.rect.x -= speed

到目前为止，只有当玩家按下箭头键时激光才会移动。如果玩家停止按箭头键，激光器也将停止移动，如果玩家向不同方向移动，激光器也会朝那个方向移动。

这是我的完整游戏代码：

while GameOn == True:
    Player1.background(gameDisplay)
    if len(EnemyAliens) < 1:
        pygame.time.delay(3000)
        wave = wave + 1
        diff = diff + wave
        for i in range(diff):
            block = Aliens()
            block.rect.y = random.randrange(200, DisplayHeight-10)
            block.rect.x = random.randrange(110, DisplayWidth-10)
            EnemyAliens.add(block)
            all_sprites.add(block)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                keyy = pygame.key.get_pressed()
                print(direction)
                lazer1 = lazer()
                lazer1.rect.y = Player1.rect.y
                lazer1.rect.x = Player1.rect.x
                all_sprites.add(lazer1)
                lazer_list.add(lazer1)
    for lazer1 in lazer_list:
        block_hit_list = pygame.sprite.spritecollide(lazer1, EnemyAliens, True)
        for block in block_hit_list:
            lazer_list.remove(lazer1)
            all_sprites.remove(lazer1)
            score += 1
            print(score)
        if lazer1.rect.y<-10 or lazer1.rect.y > DisplayHeight + 10 or lazer1.rect.x < -10 or lazer1.rect.x > DisplayWidth +10:
            lazer_list.remove(lazer1)
            all_sprites.remove(lazer1)
    for block in EnemyAliens:
        speed = 3
        if block.rect.x > 115:
            block.rect.x -= speed
        elif block.rect.x < 115:
            block.rect.x += speed
        if block.rect.y < 91:
            block.rect.y += speed
        elif block.rect.y > 91:
            block.rect.y -= speed
        col = pygame.sprite.collide_rect(Earth1,block)
        if col == True:
            all_sprites.remove(block)
            EnemyAliens.remove(block)
            earth_health -= 10
    for Pl in PlayerList:
        key = pygame.key.get_pressed()
        speed = 6
        direction = "w"          
        if key[pygame.K_UP]:
            Pl.rect.y -= speed
            direction = "U"
        elif key[pygame.K_DOWN]:
            Pl.rect.y += speed
            direction = "D"
        if key[pygame.K_RIGHT]:
            Pl.rect.x += speed
            direction = "R"
        elif key[pygame.K_LEFT]:
            Pl.rect.x -= speed
            direction = "L"
    if earth_health == 0 or earth_health < 0:
        if score > Highscore:
            saveHs(score)
        GameOn = False  
    HealthBars(earth_health)
    all_sprites.update()
    all_sprites.draw(gameDisplay)
    PlayerList.draw(gameDisplay)
    pygame.display.update()

如何让激光沿着玩家移动的方向移动，而不是随着玩家一起移动？

如何在一个朝下的射击游戏中朝某个方向移动激光子弹？

0 个答案: