雪碧问题

Question

1. 我目前遇到的问题是我的图像似乎是自己填充屏幕，我该如何解决这个问题？

   import pygame, os, sys 
   from pygame.locals import* 
   
   pygame.init() 
   
   sHEIGHT = 600 
   sWIDTH = 800 
   gName = "Survive" 
   
   fps = pygame.time.Clock() 
   FPS = 10 
   
   GD = pygame.display.set_mode((sWIDTH,sHEIGHT)) 
   class Main: 
   white = (255,255,255) 
   
   def display(white): 
       pygame.display.set_caption(gName) 
       GD.fill(white) 
   def player1(): 
       img ="Images/" 
       health = 100 
       global movex 
       global movexchange 
       global movey 
       global moveychange 
       global imgplayer1 
       movex = 400 
       movey = 400 
       movexchange = 0 
       moveychange = 0 
   
       imgplayer1 = pygame.image.load(os.path.join(img, "Human.png")) 
   
   
   
   
       pygame.display.update()       
   
   
   def gameLoop(): 
       fps.tick(FPS) 
   
   
       while True: 
        print(fps) 
        global movexchange 
        global moveychange 
        global movex 
        global movey 
        for event in pygame.event.get(): 
         if event.type == pygame.QUIT: 
            pygame.quit() 
            sys.exit() 
         if event.type == pygame.KEYDOWN: 
          if event.key == pygame.K_a: 
            moveychange = 0 
            movexchange -=5 
          if event.key == pygame.K_w: 
            moveychange -=5 
            movexchange =0 
          if event.key == pygame.K_s: 
            moveychange += 5 
            movexchange = 0  
          if event.key == pygame.K_d: 
            moveychange = 0 
            movexchange +=5  
         if event.type == pygame.KEYUP:   
          if event.key == pygame.K_a: 
           movexchange =0 
           moveychange =0 
          if event.key == pygame.K_w: 
           movexchange =0 
           moveychange =0 
          if event.key == pygame.K_s: 
           movexchange =0 
           moveychange =0 
          if event.key == pygame.K_d: 
           movexchange =0 
           moveychange =0   
   
   
        movex += movexchange 
        movey += moveychange 
        GD.blit(imgplayer1,(movex,movey)) 
        pygame.display.update() 
   
   
   display(white) 
   player1() 
   gameLoop() 
   

没有人有任何想法，为什么发生这种情况，我该如何解决这一问题？

Answer 1

PyGame是低级库。

你必须清除屏幕，然后在新的位置blit对象。您可以使用一些图像作为背景，或者您可以使用fill(color)来填充屏幕。

# --- constants --- (UPPER_CASE names) 

WHITE = (255, 255, 255) 
FPS = 30 

# --- functions --- (lower_case names) 

def game_loop(): 
    global move_x_change 
    global move_y_change 
    global move_x 
    global move_y 

    while True: 
     # --- events --- 

     for event in pygame.event.get(): 
      # ... code ... 

     # --- updates (without draws) --- 

     move_x += move_x_change 
     move_y += move_y_change 

     # --- draws (without updates) --- 

     # clear buffer 
     screen.fill(WHITE) 

     # draw elements 
     screen.blit(img_player_1, (move_x, move_y)) 

     # send buffer on screen 
     pygame.display.update() 

     # --- FPS --- 

     # keep constant speed 
     fps.tick(FPS) 

# --- main --- 

pygame.init() 
# ... code ... 

---

BTW：PEP 8 -- Style Guide for Python Code

示例如何组织代码：simple和other templates