Change the position of the origin in PyGame coordinate system

Question

I am doing some operations with vectors and physics in PyGame and the default coordinate system is inconvenient for me. Normally the (0, 0) point is at the top-

Answer 1

If the objects you're trying to render are vertically symmetrical (like rectangles), you can just flip the screen to get the coordinate system to be the bottom-left, like this:

display_surface = pygame.display.get_surface()
display_surface.blit(pygame.transform.flip(display_surface, False, True), dest=(0, 0))

You can do the same thing horizontally top/bottom-right. The important methods are documented here:

• pygame.display.get_surface()
• pygame.transform.flip(Surface, xbool, ybool)
• Surface.blit(Surface, dest)