在pygame中，如何在多个背景之间切换

Question

我在python中练习使用pygame包，制作了一个面向图形的游戏，在我的游戏中，我想随着用户的进度在多个背景之间切换。就我发布的例子而言，第一个背景将是一个有5条语句的黑屏，第二个背景是一个房间。然而，我无法弄清楚这一点，因为每当我尝试运行代码时，游戏窗口都不会显示任何内容。我可以在下面的while循环中发布我的代码，以便进一步澄清。

while running:
screen.fill((0, 0, 0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
first_line()
second_line()
third_line_1()
third_line_2()
fourth_line()
fifth_line()
sleep(10)
screen.blit(background_room, (0, 0))
pygame.display.update()

Answer 1

我可能会采用类似的方式

import pygame
from pygame.locals import *
class Backround:
FIVE_STATEMENTS = 0
ROOM = 1
viewport_size = (800, 600)
def main():
pygame.init()
screen = pygame.display.set_mode(viewport_size)
backround_room = pygame.Surface(viewport_size)
# load the image...
backround_statements = pygame.Surface(viewport_size)
backround_statements.fill((0, 0, 0))
# blit the five statements onto here
backround_to_render = Backround.FIVE_STATEMENTS
running = True
while running:
for event in pygame.event.get():
if event.type == QUIT:
running = False
if backround_to_render == Backround.FIVE_STATEMENTS:
# if the statements ever change, probably want to fill() and re-blit them on
screen.blit(backround_statements, (0,0))
elif backround_to_render == Backround.ROOM:
screen.blit(backround_room, (0,0))
else:
print("Oh no!!!!!!!")
pygame.display.flip()
if __name__ == "__main__":
main()