Pygame: Variable not updating each iteration

Question

I'm brand new to Python, so this is probably a simple problem. I want the code to display "rotation: " followed by the value of the variable player_rotation. It does this, but the value displayed does not by 1 every iteration (as I would expect it to).

import pygame
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((480, 480))
myfont = pygame.font.SysFont("monospace", 15)
player_rotation = 0
rotation_label = myfont.render("rotation: " + str(player_rotation), 1, (255,255,0))

while 1:

    screen.blit(rotation_label, (100,100))
    player_rotation += 1
    pygame.display.flip()

for event in pygame.event.get():
    if event.type==pygame.QUIT:
        pygame.quit()
        exit(0)

Yossi · Accepted Answer · 2013-12-14 20:29:42Z

1

You set the label only once and this occurs before the loop. Try moving rotation_label into your loop.

while 1:
    rotation_label = myfont.render("rotation: " + str(player_rotation), 1, (255,255,0))
    screen.blit(rotation_label, (100,100))
    player_rotation += 1
    pygame.display.flip()

Also, your code in for loop is never executed because it appears after your while 1

answered Dec 14, 2013 at 20:29

Yossi

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Comments

Osvaldo Costa · Accepted Answer · 2013-12-14 19:59:04Z

0

You forgot to put tab spaces in your while(1) loop. That is:

while 1:
    screen.blit(rotation_label, (100,100))
    player_rotation += 1
    pygame.display.flip()

answered Dec 14, 2013 at 19:59

Osvaldo Costa

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1 Comment

user3102886 Over a year ago

Damn. Formatting got messed up. The code is indented properly in PyCharm, but it still displays and unchanging "rotation: 0" when I run it. Edited my post to reflect the true formatting

Hyperboreus · Accepted Answer · 2013-12-14 20:28:55Z

0

You just update the variale player_rotation, but you never render you label it anew.

answered Dec 14, 2013 at 20:28

Hyperboreus

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