graphics - pygame图形网格

Question

您好，我是Python和图形编程的新手。目前，我正在实践中创建网格，并且在使pygame将对象放置在表面窗口顶部时遇到问题。

以下是我的注释代码。我认为问题可能与blit函数有关，但我不确定。任何帮助，将不胜感激。此外，Python Shell不会突出显示任何异常或错误，但是程序不会运行。

import sys, random, pygame
from pygame.locals import *


def main():
    #settings
    boardDims = (20,20) #number of cells on board

    #pygame settings
    cellDims = (20,20) #number of pixels on cells
    framerate = 50
    colours = {0:(0,0,0), 1:(255,255,255)}         

    #pygame
    pygame.init()
        #sets x and y pixels for the window
    dims = (boardDims[0] * cellDims[0],
            boardDims[1] * cellDims[1])
    #sets window, background, and framrate
    screen = pygame.display.set_mode(dims)
    background = screen.convert()
    clock = pygame.time.Clock()        

    #create new board
    board = {}
        #iterates over x and y axis of the window
    for x in range(boardDims[0]):
        for y in range(boardDims[1]):
            board[(x,y)] = 0 #sets whole board to value 0 
    board[(1,1)] = 1 #sets one square at co-ordinates x=1,y=1 to cell
                     # value 1
    return board


    running = 1
    while running:
        # 1 PYGAME
        #get input
        for event in pygame.event.get():
            if event.type == QUIT or \
                (event.type == KEYDOWN and event.key == K_ESCAPE):
                    running = 0
                    return
        #link pygames clock to set framerate
        clock.tick(framerate)


        for cell in board:
            #adds cells dimensions and co-ordinates to object rectangle
            rectangle =  (cell[0]*cellDims[0], cell[1]* cellDims[1],
                          cellDims[0], cellDims[1])
            #pygame draws the rectabgle on the background using the relevant
            #colour and dimensions and co-ordinates outlined in 'rectangle'
            square = pygame.draw.rect(background, colours[board[cell]],
                                      rectangle)
        #blits and displays object on the background
        background.blit(square)
        screen.blit(background, (0,0))
        pygame.display.flip()   


if __name__ == "__main__": 
    main()

Answer 1

在执行任何blit之前，“返回板”语句正在退出程序。

同样，您可以直接在屏幕变量上使正方形变灰，即:您不需要背景变量。