PyGameExamplesAndAnswers

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“Once I get on a puzzle, I can’t get off.” Richard P. Feynman

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Code snippets

Minimal application loop

import pygame

pygame.init()
window = pygame.display.set_mode((500, 500))
clock = pygame.time.Clock()

font = pygame.font.SysFont(None, 100)
text = font.render("Text", True, (255, 255, 0))

run = True
while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False 

    window_center = window.get_rect().center

    window.fill('black')
    pygame.draw.circle(window, (255, 0, 0), window_center, 100)
    window.blit(text, text.get_rect(center = window_center))
    pygame.display.flip()
    clock.tick(60)

pygame.quit()
exit()

Background

Checkered background Surface:

background = pygame.Surface(window.get_size())
ts, w, h, c1, c2 = 50, *background.get_size(), (128, 128, 128), (64, 64, 64)
tiles = [((x*ts, y*ts, ts, ts), c1 if (x+y) % 2 == 0 else c2) for x in range((w+ts-1)//ts) for y in range((h+ts-1)//ts)]
[pygame.draw.rect(background, color, rect) for rect, color in tiles]

Move

keys = pygame.key.get_pressed()
rect.x += (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * vel
rect.y += (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * vel

rect.centerx = rect.centerx % window.get_width()
rect.centery = rect.centery % window.get_height()

rect.clamp_ip(window.get_rect())