Pygame 因为精灵而滞后？

Question

我用精灵制作了这样的游戏来制作平台游戏。

之前还好，现在就卡了，所以重力一动一动，看起来不自然。

刚开始还不错，当时平台是长方形的。

我更改了平台并插入了一个敌人列表作为精灵。

它确实工作正常，但它非常滞后而且非常慢。我不喜欢这个角色 "stuttering"。我能做什么？

import pygame, sys
from pygame.locals import *
pygame.init()

class Poppy(pygame.sprite.Sprite):
   def __init__(self): #making the player
       pygame.sprite.Sprite.__init__(self)
       self.image = pygame.image.load('POPPY.png')
       self.rect = self.image.get_rect()
       self.grav = .5
       self.y_vel = 0
       self.jumping = False

   def jump_update(self): #checking the jumps
       if self.jumping:
           self.y_vel += self.grav
           self.rect.y += self.y_vel

   def jump(self): #the jump initializer
       if not self.jumping:
           self.y_vel = -50
           self.jumping = True

   def keys(self): #the keys
       key = pygame.key.get_pressed()
       dist = 5
       if key[pygame.K_RIGHT]: # right key
           self.rect.x += dist # move right
       elif key[pygame.K_LEFT]: # left key
           self.rect.x -= dist

   def collide_check(self, platform_list): #check if it hit the ground or the platforms
       for blocks in platform_list:
           if pygame.sprite.collide_rect(self, blocks) == True:
               self.rect.y = blocks.top

       if self.rect.y >= 600-self.rect.height:              # BALL HITS TOP AND BOTTOM
           self.grav = 0
           self.y_vel = 0
           self.rect.y = 600 - self.rect.height
           self.jumping = False

   def move(self):
       self.rect.x += 0
       self.rect.y += 10

   def draw(self, surface):
       surface.blit(self.image, (self.rect.x, self.rect.y))

class Platform(pygame.sprite.Sprite):
   def __init__(self):
       pygame.sprite.Sprite.__init__(self)
       self.image = pygame.image.load('levoneplatform.png')
       self.rect = self.image.get_rect()

class Enemy(pygame.sprite.Sprite):

 def __init__(self):
     pygame.sprite.Sprite.__init__(self)
     self.image = pygame.image.load('enemy.png')
     self.rect = self.image.get_rect()

class Menu():
   def setup(self):
       background_image = pygame.image.load('menu.png').convert_alpha()
       screen.blit(background_image, [0,0])


class LevOne():
   def setup(self):

       background_image = pygame.image.load('night.png').convert_alpha()
       screen.blit(background_image, [0, 0])


       platforms_one = [ (200,300),
                       (50,500),
                       (550,650),
                       (300,200),
                       (120,100)
                  ]
       for k,v in platforms_one:
           platform = Platform()
           enemy = Enemy()
           platform.rect.x = k
           enemy.rect.x = k
           platform.rect.y = v
           enemy.rect.y = v - 44
           platform_list.add(platform)
           enemy_list.add(enemy)

screen = pygame.display.set_mode((800,600))
enemy_list = pygame.sprite.Group()
platform_list = pygame.sprite.Group()
Poppy = Poppy()
Menu = Menu()
LevOne = LevOne()


clock = pygame.time.Clock()
level = 0

while True:
  for event in pygame.event.get():
      if event.type == QUIT:
          pygame.quit()
          sys.exit()
      elif event.type == KEYDOWN:
          if event.key == K_SPACE:
              Poppy.jump()
              Poppy.jump_update()

  Menu.setup()
  if event.type == MOUSEBUTTONDOWN:
       x,y = pygame.mouse.get_pos()
       if x >= 544.86 and x <= 700.86 and y <= 385.02 and y >= 340.03:
           level = 1

  if level == 1:

      first_lives = 5
      LevOne.setup()

      Poppy.keys()
      Poppy.move()


      Poppy.draw(screen)
      platform_list.draw(screen)
      enemy_list.draw(screen)


      Poppy.draw(screen)

  pygame.display.update()

Answer 1

我注意到您在每次迭代时都加载了 LevOne 背景，并初始化了各种精灵。这是一次性操作，因此没有必要在每次迭代时都这样做，并且可能会导致您遇到卡顿。您应该将背景加载到 LevOne class 的 __init__ 中，以及将在关卡中使用的任何精灵，然后在设置方法中 blitting 时访问背景变量。

而不是这个；

class LevOne():
   def setup(self):

       background_image = pygame.image.load('night.png').convert_alpha()
       screen.blit(background_image, [0, 0])


       platforms_one = [ (200,300),
                       (50,500),
                       (550,650),
                       (300,200),
                       (120,100)
                  ]
       for k,v in platforms_one:
           platform = Platform()
           enemy = Enemy()
           platform.rect.x = k
           enemy.rect.x = k
           platform.rect.y = v
           enemy.rect.y = v - 44
           platform_list.add(platform)
           enemy_list.add(enemy)

试试这个：

class LevOne():
   def __init__(self):
       self.background_image = pygame.image.load('night.png').convert_alpha()
       platforms_one = [ (200,300),
                       (50,500),
                       (550,650),
                       (300,200),
                       (120,100)
                  ]
       for k,v in platforms_one:
           platform = Platform()
           enemy = Enemy()
           platform.rect.x = k
           enemy.rect.x = k
           platform.rect.y = v
           enemy.rect.y = v - 44
           platform_list.add(platform)
           enemy_list.add(enemy)
   def setup(self):
       screen.blit(self.background_image, [0, 0])

我注意到菜单 class 也存在同样的问题。应进行如下相同的更改。

class Menu():
   def __init__(self):
       self.background_image = pygame.image.load('menu.png').convert_alpha()
   def setup(self):
       screen.blit(self.background_image, [0,0])

我只是想重申我认为这是运行缓慢的原因是它必须在每次迭代时从系统中打开一个文件，这是一个缓慢的操作，而且你还不断地创建你的一级精灵列表，只需要做一次。

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