python - Pygame 由于 Sprite 而滞后？

Question

我用 Sprite 制作了这样的游戏来制作平台游戏。

以前还好，但现在有点滞后，所以当施加重力时，它会移动一格，看起来不自然。

一开始还不错，因为平台是矩形的。

我更改了平台，还插入了敌人列表作为 Sprite 。

它确实工作得很好，但它非常滞后而且非常慢。我不喜欢这个角色的“口吃”。我能做些什么？

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中加载 LevOne 背景，并初始化各种 Sprite 。这是一次性操作，因此没有必要在每次迭代中都执行此操作，并且可能会导致您遇到的口吃。您应该在 __init__ 中加载背景您的 LevOne 类以及关卡中将使用的任何 Sprite ，然后在设置方法中进行位图传输时访问背景变量。

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 Menu 类也存在同样的问题。应进行相同的更改，如下所示。

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运行缓慢的原因是它必须在每次迭代时从系统打开一个文件，这是一个缓慢的操作，并且您还不断为第一级创建 Sprite 列表，只需要做一次。