Pygame 为游戏导入矩形时出现问题

Question

我有一个关于在 pygame 中放置矩形的小问题。当我运行代码时，我看不到矩形。有谁知道如何解决这个问题？

import pygame as pg
from pygame.locals import *

pg.init()

BLACK = ( 0, 0, 0)
WHITE = ( 255, 255, 255)
GREEN = ( 0, 255, 0)
RED = ( 255, 0, 0)


size = width, height = (800, 800)
screen = pg.display.set_mode(size)
pg.display.set_caption("Ball Game")
screen.fill((10, 255, 255))
pg.display.update()
running = True
clock = pg.time.Clock()

#board = pg.draw.rect(screen, BLACK, pg.Rect(30, 30, 60, 60))
#board_loc = pg.
#board_loc.center = width/2, height*0.8

background_image = pg.image.load("pngtree-blue-cartoon-minimalist-planet-surface-starry-sky-main-map-background-image_186868.jpg").convert()

while running:
    for event in pg.event.get():
        if event.type == QUIT:
            running = False
    screen.blit(background_image, [0, 0])
    pg.display.flip()
    #screen.blit(board, board_loc)
    rect = pg.Rect(0, 0, 200, 100)
    rect.center = (300, 300)
    pg.draw.rect(screen, BLACK, rect)


clock.tick(30)
pg.quit()

enter image description here

Answer 1

绘制矩形后必须更新显示：

rect = pg.Rect(0, 0, 200, 100)
rect.center = (300, 300)

while running:
    for event in pg.event.get():
        if event.type == QUIT:
            running = False

    # draw background
    screen.blit(background_image, [0, 0])
   
    # draw rectangle on top of the background 
    pg.draw.rect(screen, BLACK, rect)

    # update display
    pg.display.flip()

您实际上是在 Surface object. If you draw on the Surface associated to the PyGame display, this is not immediately visible in the display. The changes become visible, when the display is updated with either pygame.display.update() or pygame.display.flip() 上绘图。

Pygame 为游戏导入矩形时出现问题

Pygame Issue with importing a rectangle for a game

python

pygame

pycharm

screen