如何更改 Pygame 坐标系，使窗口中心为 (0,0)? [英] How do I change the Pygame coordinate system so that the center of the window is (0,0)?

问题描述

我想更改 pygame 坐标系，以便窗口的中心为 (0,0) 并具有负值，如 图像.有没有办法转换坐标?

I want to change pygame coordinate system so that the center of the window is (0,0) and has negative values as in the image. Is there a possible way to convert the coordinates?

https://i.stack.imgur.com/sGPFt.gif

推荐答案

PyGame 使用左上角为 (0,0) 的坐标系.这是无法改变的.

PyGame uses a coordinate system where the top left corner is (0,0). That cannot be changed.

如果你想把坐标系的原点移动到屏幕中心，那么你必须自己平移坐标.例如编写一个转换坐标的函数:

If you want to move the origin of the coordinate system to the center of the screen, then you have to translate the coordinates by yourself. For instance write a function that translates the coordinates:

def center_origin(surf, p):
    return (p[0] + surf.get_width() // 2, p[1] + surf.get_height() // 2)

screen.blit(my_image, center_origin(screen, (x, y)))

或者使用 lambda 表达式:

Or use a lambda expression:

center_origin = lambda p: (p[0] + screen.get_width() // 2, p[1] + screen.get_height() // 2)

screen.blit(my_image, center_origin((x, y))

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