Python livewires调整大小屏幕

Question

我正在尝试使用有多个级别的livewires创建游戏.在每个级别,屏幕将需要不同的大小,所以我可以创建一个新的屏幕,或者我可以调整它的大小.当我尝试新屏幕时,像这样(mcve):

from livewires import games
games.init(screen_width = 500, screen_height=100, fps = 50)
#dosomething
games.screen.quit()
games.init(screen_width = 100, screen_height=500, fps = 50)    
games.screen.mainloop()

我收到错误:

Traceback (most recent call last):
  File "C:\Users\Fred\Desktop\game\main.py", line 6, in <module>
    games.screen.mainloop()
  File "C:\Users\Fred\Desktop\game\livewires\games.py", line 308, in mainloop
    object._tick()
  File "C:\Users\Fred\Desktop\game\livewires\games.py", line 503, in _tick
    self.tick()
  File "C:\Users\Fred\Desktop\game\livewires\games.py", line 776, in tick
    self._after_death()
  File "C:\Users\Fred\Desktop\game\main.py", line 5, in <module>
    games.init(screen_width = 100, screen_height=500, fps = 50)
  File "C:\Users\Fred\Desktop\game\livewires\games.py", line 884, in init
    screen = Screen(screen_width, screen_height, fps)
  File "C:\Users\Fred\Desktop\game\livewires\games.py", line 159, in __init__
    raise GamesError("Cannot have more than on Screen object")

livewires.games.GamesError: Cannot have more than on Screen object

---

games.screen.width并且height无法设置(你只能得到它们),所以我不能这样做,当我在livewires.games中更改添加行以将屏幕计数重置为0时,我在pygame中出现错误.

有没有人知道调整大小的方法,或者在livewires中销毁和重新创建屏幕？

---

注意:我正在使用Michael Dawsons编辑的版本.下载pygame和使用的livewires.

Answer 1

您可以探索一种方法，通过调用pygamedisplay.set_mode中的方法，例如在类构造函数中（您提供的包中的 game.py 中的 l.165）Screen

games.init(screen_width = 500, screen_height=100, fps = 50)

#[...] level stuffs...

games.screen._width = 100  # this setup the width property directly in the screen
games.screen._height = 500 # this setup the height property 
games.screen._display = pygame.display.set_mode((100, 500)) # this update the display

此解决方案的一个缺点是，如果您在屏幕更改期间保留一些活动精灵，它们将无法在显示时正确更新擦除方法，这可能会在绘画过程中留下一些线条。为了避免这种情况，您可以调用games.screen.clear()，或者如果您需要选择性清理，则可以使用重写Sprite类，该类可以通过调用 来处理正确的方法screen.blit_and_dirty。

class MySprite(games.Sprite):
    def __init__(self, screen, *args, **kwargs):
        self.screen = screen
        super().__init__(*args, **kwargs)

    def _erase(self):
        """
        This method overrides the class method by using blit_and_dirty instead of blit_background
        """
        self.screen.blit_and_dirty(self.screen._background, self._rect)

要使用这个类，你只需继承它，并添加 screen 参数：

class Ball(MySprite):
    def __init__(self, screen):
        super().__init__(screen, games.load_image('ball.png'), x=40, y=40, dx=2, dy=2)

    def update(self): 
        if self.left<=0 or self.right>=self.screen.get_width():
            self.dx*=-1

        if self.top<=0 or self.bottom>=self.screen.get_height():
            self.dy*=-1

您可以声明一个实例，如下所示：

games.init(screen_width = 500, screen_height=100, fps = 50)
games.screen.add(Ball(games.screen) )
...