在绘制完整的窗格后，PYGAME延迟 [英] Pygame lags after drawing full window grid

问题描述

我被编码为一个简单的电子游戏网格窗口。但在那之后，假游戏窗口开始延迟。

下面是简单代码👇

import pygame
import random

pygame.init()
pygame.font.init()

screen_width = 500
screen_height = screen_width

screen = pygame.display.set_mode((screen_width,screen_height))
pygame.display.set_caption("Snake GaMe By Akila")

def drawGrid():
    grid_list = []
    blockSize = 25
    for x in range(screen_width):
        for y in range(screen_height):
            rect = pygame.Rect(x*blockSize, y*blockSize, blockSize, blockSize)
            pygame.draw.rect(screen, (255,255,255), rect, 1)

running = True
while running:
    screen.fill((0,0,0))
    drawGrid()
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    pygame.display.update()

我尝试更改drawGrid()函数位置的调用代码段。

推荐答案

若要提高性能，请不要在每一帧中构造Grind。

创建具有窗口大小的pygame.Surface，并在此表面上绘制网格：

grid_surf = pygame.Surface((screen_width,screen_height))
drawGrid(grid_surf)

该曲面是场景的背景。blit每帧开头：

screen.blit(grid_surf, (0, 0))

示例代码：

import pygame
import random

pygame.init()
pygame.font.init()

screen_width = 500
screen_height = screen_width

screen = pygame.display.set_mode((screen_width,screen_height))
pygame.display.set_caption("Snake GaMe By Akila")

def drawGrid(surf):
    grid_list = []
    blockSize = 25
    for x in range(screen_width):
        for y in range(screen_height):
            rect = pygame.Rect(x*blockSize, y*blockSize, blockSize, blockSize)
            pygame.draw.rect(surf, (255,255,255), rect, 1)

grid_surf = pygame.Surface((screen_width,screen_height))
drawGrid(grid_surf)

running = True
while running:
    screen.blit(grid_surf, (0, 0))

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

    pygame.display.update()

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