为什么我的 pygame 屏幕只显示黑色图像？

如何解决为什么我的 pygame 屏幕只显示黑色图像？

出于某种原因，即使我在关卡和关卡编辑器中定义了所有内容，我也没有收到回复。我真正想做的是在我的 pygame 屏幕上显示地图。我正在使用 cv2、sys、cv2_imread、pygame 和 pygame_locals 库。没有出现错误消息，所以我没有在互联网上找到任何答案。好像也是opencv端的代码有问题。

代码：

pygame.init()

screen = pygame.display.set_mode((226,318))
player_pos = [95,292]

player = pygame.image.load('Player.png').convert()
player.set_colorkey((255,255,255))

level1 = list(imread('Map1.png'))  # the​ image

moving_right = False
moving_left = False
moving_up = False
moving_down = False


clock = pygame.time.Clock()
while True:
    screen.fill((15,15,15))

    player_rect = screen.blit(player,player_pos)

    if moving_right == True:
        player_pos[0] += 2
    if moving_left == True:
        player_pos[0] -= 2
    if moving_up == True:
        player_pos[1] -= 2
    if moving_down == True:
        player_pos[1] += 2

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

        if event.type == KEYDOWN:
            if event.key == K_RIGHT:
                moving_right = True
            if event.key == K_LEFT:
                moving_left = True
            if event.key == K_UP:
                moving_up = True
            if event.key == K_DOWN:
                moving_down = True
        if event.type == KEYUP:
            if event.key == K_RIGHT:
                player_pos[0] += 24
                moving_right = False
            if event.key == K_LEFT:
                player_pos[0] -= 24
                moving_left = False
            if event.key == K_UP:
                player_pos[1] -= 24
                moving_up = False
            if event.key == K_DOWN:
                player_pos[1] += 24
                moving_down = False

    if player_pos[1] > 290:
        moving_down = False #This will be changed later so you die
    if player_pos[1] < 4:
        moving_up = False
    if player_pos[0] < 4:
        moving_left = False
    if player_pos[0] > 212:
        moving_right = False

    a = screen.get_width()/32
    b = screen.get_height()/24

    for i in range(len(level1)):
        for j in range(len(level1[i])):
            blue = list(level1[i][j])[0]
            green = list(level1[i][j])[1]
            red = list(level1[i][j])[2]
            if blue == 255 and green == 255 and red == 255:
                pygame.draw.rect(screen,(255,255),pygame.Rect(j*a,i *b,32,32))
            else:
                pygame.draw.rect(screen,(0,0),pygame.Rect(j * a,i * b,32))

    pygame.display.update()
    clock.tick(120)
    print(clock.get_fps())

pygame.quit()

播放器.png：

Map1.png：

解决方法

我无法解决整个问题，但出现黑屏的主要原因之一是因为您将 print(df) type symbol desc 0 pet A 1 1 toy 2 B 2 toy 3 C 3 car D 4 和 j*a 相乘。

例如，如果您尝试：

b*i

如果你将坐标设置为 100，你也会看到玩家：

if blue == 255 and green == 255 and red == 255:
    pygame.draw.rect(screen,(255,255,255),pygame.Rect(j,i,32,32))
else:
    pygame.draw.rect(screen,(0,32))

因此，请仔细检查 if blue == 255 and green == 255 and red == 255: pygame.draw.rect(screen,pygame.Rect(100,100,32)) 。我不知道你到底想做什么。但我认为这会对你有所帮助。

j,i 的完整代码；

pygame.Rect(j*a,b*i,32)

j = 100,i = 100 的完整代码；

import sys
import pygame
from pygame import *
import cv2

pygame.init()

screen = pygame.display.set_mode((226,318))
player_pos = [95,292]

player = pygame.image.load('Player.png').convert()
player.set_colorkey((255,255))

level1 = list(cv2.imread('Map1.png'))  # the​ image

moving_right = False
moving_left = False
moving_up = False
moving_down = False

clock = pygame.time.Clock()
while True:
    screen.fill((15,15,15))
    player_rect = screen.blit(player,player_pos)
    if moving_right == True:
        player_pos[0] += 2
    if moving_left == True:
        player_pos[0] -= 2
    if moving_up == True:
        player_pos[1] -= 2
    if moving_down == True:
        player_pos[1] += 2
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == KEYDOWN:
            if event.key == K_RIGHT:
                moving_right = True
            if event.key == K_LEFT:
                moving_left = True
            if event.key == K_UP:
                moving_up = True
            if event.key == K_DOWN:
                moving_down = True
        if event.type == KEYUP:
            if event.key == K_RIGHT:
                player_pos[0] += 24
                moving_right = False
            if event.key == K_LEFT:
                player_pos[0] -= 24
                moving_left = False
            if event.key == K_UP:
                player_pos[1] -= 24
                moving_up = False
            if event.key == K_DOWN:
                player_pos[1] += 24
                moving_down = False
    if player_pos[1] > 290:
        moving_down = False #This will be changed later so you die
    if player_pos[1] < 4:
        moving_up = False
    if player_pos[0] < 4:
        moving_left = False
    if player_pos[0] > 212:
        moving_right = False
    a = screen.get_width()/32
    b = screen.get_height()/24
    print(a,b)
    for i in range(len(level1)):
        for j in range(len(level1[i])):
            blue = list(level1[i][j])[0]
            green = list(level1[i][j])[1]
            red = list(level1[i][j])[2]
            if blue == 255 and green == 255 and red == 255:
                pygame.draw.rect(screen,32))
            else:
                pygame.draw.rect(screen,0),32))
    pygame.display.update()
    clock.tick(120)
    print(clock.get_fps())

pygame.quit()