Question

我正在尝试使其从房间A移到房间B时，房间中的所有射弹消失。此刻，如果我向右射击3个弹丸，然后左移到另一个房间，则这些弹丸仍会出现在屏幕上，直到它们超出屏幕尺寸为止。

使用all_sprites_list.remove(projectile)功能可以使我从一个房间移到另一个房间一次移除一颗子弹。

例如，当我使用该行代码时，如果屏幕上当前有3个项目符号，并且我从A房间移至B房间，则屏幕上的一个项目符号将被移除，而其他2个项目符号将保留。回到房间A会移出另一颗子弹，再次移到房间B会移出第三颗。

我的问题是，当我改变房间时，如何同时移除所有三个子弹，而不是游戏中移除单个子弹？这是我的事件处理-我认为不需要任何其他代码，但是请告诉我是否需要。

# ---------- MAIN PROGRAM LOOP ---------- #


    while not done:


# --- Event Processing ---

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                done = True

# Controls
            elif event.type == pygame.KEYDOWN:
                projectile = None

                if event.key == pygame.K_LEFT:
                    projectile = ProjectileLeft("projectile.png", 0, 0)
                    projectile.rect.x = player.rect.x-15
                    projectile.rect.y = player.rect.y+33
                elif event.key == ord('a'):
                    player.changespeed(-7, 0)
                elif event.key == ord('d'):
                    player.changespeed(7, 0)
                elif event.key == ord('w'):
                    player.changespeed(0, -7)
                elif event.key == ord('s'):
                    player.changespeed(0, 7)


                if projectile:
                    projectile_list.add(projectile)


            elif event.type == pygame.KEYUP:
                if event.key == ord('a'):
                    player.changespeed(7, 0)
                elif event.key == ord('d'):
                    player.changespeed(-7, 0)
                elif event.key == ord('w'):
                    player.changespeed(0, 7)
                elif event.key == ord('s'):
                    player.changespeed(0, -7)


        all_sprites_list.update()
        projectile_list.update()

这是我的游戏逻辑；

player.move(current_room.wall_list)

if player.rect.x < -15:
    if current_room_no == 0:
        current_room_no = 3
        current_room = rooms[current_room_no]
        player.rect.x = 790
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    elif current_room_no == 3:
        current_room_no = 2
        current_room = rooms[current_room_no]
        player.rect.x = 790
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    elif current_room_no == 2:
        current_room_no = 1
        current_room = rooms[current_room_no]
        player.rect.x = 790
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    else:
        current_room_no = 0
        current_room = rooms[current_room_no]
        player.rect.x = 790
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)

if player.rect.x > 801:
    if current_room_no == 0:
        current_room_no = 1
        current_room = rooms[current_room_no]
        player.rect.x = 0
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    elif current_room_no == 1:
        current_room_no = 2
        current_room = rooms[current_room_no]
        player.rect.x = 0
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    elif current_room_no == 2:
        current_room_no = 3
        current_room = rooms[current_room_no]
        player.rect.x = 0
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)
    else:
        current_room_no = 0
        current_room = rooms[current_room_no]
        player.rect.x = 0
        projectile_list.remove(projectile)
        all_sprites_list.remove(projectile)

这是我脚本的结尾：

# Load background to current room       
        screen.blit(current_room.background_image, current_room.background_position)


    # Load time to screen
        Timer = font.render(output_string, True, constants.WHITE)
        screen.blit(Timer, [350, 30])

# Draw all sprites in lists on screen
        all_sprites_list.draw(screen)
        current_room.wall_list.draw(screen)
        current_room.enemy_sprites.draw(screen)
        if len(projectile_list)!=0
            projectile_list.draw(screen)

        frame_count += 1

        clock.tick(frame_rate)

        pygame.display.flip()

    pygame.quit()

if __name__ == "__main__":
    main()

Answer 1

注释中有些混乱，因为projectile_list实际上不是列表，而是pygame.sprite.Group。如果要从组中删除所有精灵，则可以调用empty方法：projectile_list.empty()。

请注意，empty仅将精灵从该特定组中删除。如果要从所有组中删除相同的精灵，可以遍历这些精灵并调用其kill方法。

移至其他房间时，请移除所有投射物

1 个答案: