在PyGame中获取1像素RGB颜色

Question

How can i get one pixel RGB color in my 2D game? I need to compare it to red color(255,0,0), so i need it like this (R,G,B). I tried to use get_at() method like this:

if background.get_at(x,y) == (255,0,0):
    print("same")
else:
    print("not same")

But it didn't worked.

Answer 1

code:

import pygame
pygame.init()
background = pygame.display.set_mode([640,480])
background_colour = (3, 3, 251)
background.fill(background_colour)
pygame.display.flip()

print(background.get_at(2,2))
if background.get_at(background(2,2)) == background_colour:
   print("Same")
else:
   print("Not same:")

Error:

Traceback (most recent call last):
File "C:/Users/Kaspar/Desktop/proov13.py", line 8, in <module>
print(background.get_at(2,2))
TypeError: function takes exactly 1 argument (2 given)

Answer 2

Looking at Pygame docs: http://www.pygame.org/docs/ref/surface.html#pygame.Surface.get_at You need to do:

background.get_at((2,2))

This is passing a single argument to the function, in this case the argument is the tuple (2,2)

Also, if you want the colour in the form (255,0,0) then you need to call tuple(background.get_at((2,2))) (assuming you're using pygame version > 1.9.0).