python - Pygame 使用箭头键指向 "Look Around"

Question

我目前正在尝试对一系列房间进行编码，这里称为节点。您从朝北的第一个房间/节点 (node1) 开始，然后显示北向的图像。如果按向左/向右/向下箭头键，您将面朝指南针上的相应点，并且会显示该方向的新图像。如果在第一个节点中朝北按向上箭头键，您将进入第二个节点。

但是，当我执行此代码时，任何按键都会导致我进入第二个节点。我浏览了一下，觉得使用 AND 语句应该不会出现问题，但显然我在这些循环中遗漏了一些东西。

预先感谢您的帮助...

def node1():
    node1_here = True
    node1_look_north = True
    node1_look_south = False
    node1_look_east = False
    node1_look_west = False
    node1_north_image = pygame.image.load('node1north.jpg')
    node1_south_image = pygame.image.load('node1south.jpg')
    node1_east_image = pygame.image.load('node1east.jpg')
    node1_west_image = pygame.image.load('node1west.jpg')
    while node1_here:
        while node1_look_north:
            screen.blit(node1_north_image, (0, 0))
            pygame.display.update()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    quit()
                elif event.type == pygame.KEYDOWN and pygame.K_UP:
                    node2()
                elif event.type == pygame.KEYDOWN and pygame.K_DOWN:
                    node1_look_south = True and not node1_look_north
                elif event.type == pygame.KEYDOWN and pygame.K_LEFT:
                    node1_look_east = True and not node1_look_north
                elif event.type == pygame.KEYDOWN and pygame.K_RIGHT:
                    node1_look_west = True and not node1_look_north
        while node1_look_south:
            screen.blit(node1_south_image, (0, 0))
            pygame.display.update()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    quit()
                elif event.type == pygame.KEYDOWN and pygame.K_DOWN:
                    node1_look_north = True and not node1_look_south
                elif event.type == pygame.KEYDOWN and pygame.K_LEFT:
                    node1_look_west = True and not node1_look_south
                elif event.type == pygame.KEYDOWN and pygame.K_RIGHT:
                    node1_look_east = True and not node1_look_south
        while node1_look_east:
            screen.blit(node1_east_image, (0, 0))
            pygame.display.update()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    quit()
                elif event.type == pygame.KEYDOWN and pygame.K_DOWN:
                    node1_look_west = True and not node1_look_east
                elif event.type == pygame.KEYDOWN and pygame.K_LEFT:
                    node1_look_south = True and not node1_look_east
                elif event.type == pygame.KEYDOWN and pygame.K_RIGHT:
                    node1_look_north = True and not node1_look_east
        while node1_look_west:
            screen.blit(node1_west_image, (0, 0))
            pygame.display.update()
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    quit()
                elif event.type == pygame.KEYDOWN and pygame.K_DOWN:
                    node1_look_east = True and not node1_look_west
                elif event.type == pygame.KEYDOWN and pygame.K_LEFT:
                    node1_look_north = True and not node1_look_west
                elif event.type == pygame.KEYDOWN and pygame.K_RIGHT:
                    node1_look_south = True and not node1_look_west

def node2():
    node2_here = True
    node2_look_north = True
    node2_north_image = pygame.image.load('node2north.jpg')
    while node2_here:
        while node2_look_north:
            screen.blit(node2_north_image, (0, 0))
            pygame.display.update()

Answer 1

说明:

pygame.K_UP

^这是一个常数并且始终为真。因此，

elif event.type == pygame.KEYDOWN and pygame.K_UP:

^当您按任意键时，这将始终解析为 True，从而导致

node2()

被处决。

解决方案:

elif event.type == pygame.KEYDOWN and event.key == pygame.K_UP:

^这将检查按下的键是否为K_UP

希望有帮助!

引用: Pygame key docs