python - Pygame - 设计代码

Question

我对这个糟糕的标题表示歉意。我对如何使用 C# (XNA) 或 java (LibGDX) 编写游戏代码有经验，但我最近开始专门使用 python 和 pygame，并且我很难弄清楚如何设计代码。这就是我认为应该做的事情:

游戏.py文件:

import pygame
import entities

width = 400
height = 300
# Set up the window size
screen = pygame.display.set_mode((width, height), 0, 32) 
player = entities.Player(width / 2, height / 2)  # The player

#main game loop is here...

entities.py 文件:

import pygame
import game

class Player:
    def __init__(self, x, y):
        # Texture for the player
        self.texture = pygame.image.load('player.png')

    def draw(self):
        """ Draws the player """
        game.screen.blit(self.texture, (self.position.x, self.position.y))

#class Enemy: ...

但是这段代码给了我错误。我认为问题是我在 game.py 中导入 entities.py，然后在 中导入 game.py实体.py。

我将如何在 python 中正确设计它？

Answer 1

我建议使用 pygame 已经提供的内容。

看看类(class) Sprite和 Group (及其更复杂的子类)。

所以你的玩家类可能看起来像:

class Player(pygame.sprite.Sprite):

    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        # Texture for the player
        self.image = pygame.image.load('player.png')
        self.rect = self.image.get_rect(topleft=(x, y))

    # no need for a draw function
    # the sprite class will handle this
    # just make sure you store the coordinates of 
    # your entity in self.rect

    def update(self, some_game_state):
        pass # do something with some_game_state

然后，在您的游戏中，您可以将所有实体放入一个(或多个)组中，然后只需对该组调用 draw 和 update (小)。

entities = pygame.sprite.Group(player) # add other sprite here, too

# main loop
while True:
    ...

    # pass the game state to all entities
    # how you design this is up to you
    # (pass multiple values, pass a single instace of the game class,
    # create a class that encapsulates the state necesseray for the entities etc.)
    entites.update(some_game_state) 

    # pass the main surface to the draw function
    entities.draw(screen) 

    ...