Pygame:这个精灵表代码适用于另一个项目，但不适用于这个项目.为什么

Question

我之前将下面的spritesheet代码实现到我正在开发的原型中，它运行得很好，但我正试图将它实现到我当前的项目中，但它已经不起作用了，我看不出为什么会出现这种情况。

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

def events():
for event in pygame.event.get():
if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
pygame.quit()
sys.exit()
class spritesheet:
def __init__(self, filename, cols, rows):
self.sheet = pygame.image.load(filename).convert_alpha()
self.cols = cols
self.rows = rows
self.totalCellCount = cols * rows

self.rect = self.sheet.get_rect()
w = self.cellWidth = self.rect.width / cols
h = self.cellHeight = self.rect.height / rows
hw, hh = self.cellCenter = (w / 2, h / 2)

self.cells = list([(index % cols * w, index // cols * h, w, h) for index in range(self.totalCellCount)])
self.handle = list([
(0, 0), (-hw, 0), (-w, 0),
(0, -hh), (-hw, -hh), (-w, -hh),
(0, -h), (-hw, -h), (-w, -h),])

def draw(self, surface, cellIndex, x, y, handle = 0):
surface.blit(self.sheet, (x + self.handle[handle][0], y + self.handle[handle][1]), self.cells[cellIndex])

使用上面的精灵表代码，我用下面的代码将其渲染到屏幕上：

import os,pygame, spritesheet
import time, datetime
black = (0,0,0)
SCREEN_WIDTH = 1920
SCREEN_HEIGHT = 1080
HW = SCREEN_WIDTH/2
HH= SCREEN_HEIGHT/2

# Setup the clock for a decent framerate
clock = pygame.time.Clock()
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
index = 0

def run_game(width, height, fps):
pygame.init()
global screen
screen = pygame.display.set_mode((width, height))
global clock
playing = True
while playing == True:
Render(screen)

#pygame.display.flip()
clock.tick(fps)

def Render(screen):
global index
global clock
CENTER_HANDLE=4
s = spritesheet.spritesheet("art_assets/christopher_working.png", 20,1)
spritesheet.events()
screen.fill(black)
s.draw(screen, index % s.totalCellCount, HW, HH, CENTER_HANDLE)
screen = pygame.transform.scale(screen,(1920,1080))
pygame.display.update()
index += 1


run_game(1920,1080,60)    

而且效果非常好！当我尝试在下面列出的当前项目中运行它时，它不再正常工作。。。

import pygame as pg
import battlesystem
import player_dialog
import random
import spritesheet
import sys
from os import path
from settings import *

class Game:
def __init__(self):
pg.mixer.pre_init(44100, -16, 1, 2048)
pg.init()
self.screen = pg.display.set_mode((WIDTH, HEIGHT))
pg.display.set_caption(TITLE)
self.clock = pg.time.Clock()
pg.key.set_repeat(400, 80)
self.max_player_health = 100
self.current_player_health = self.max_player_health
self.current_enemy = ENEMIES['homework']
self.player_damage = 4
self.battle_flag = False
self.dialog_flag = False
self.christopher_working_flag = True
self.index = 0
self.i = 0
self.delay = 0
self.load_data()
def load_data(self):
# holds game folder path
game_folder = path.dirname(__file__)
# holds art assets
img_folder = path.join(game_folder, 'img')
# holds maps
self.map_folder = path.join(game_folder, 'maps')
# holds sounds
snd_folder = path.join(game_folder, 'snd')
# holds music
music_folder = path.join(game_folder, 'music')
self.player_img = pg.image.load(path.join(img_folder, PLAYER_IMG)).convert_alpha()
self.homework_img = pg.image.load(path.join(img_folder, HOMEWORK_IMG)).convert_alpha()
self.christopher_working = spritesheet.spritesheet('img/christopher_working.png', 20,1)
def run(self):
# game loop - set self.playing = False to end game
self.playing = True
while self.playing:
if self.battle_flag == True:
self.current_player_health = battlesystem.battle_system(self.screen, self.current_enemy, self.player_damage, self.current_player_health)
self.battle_flag = False
if self.dialog_flag == True:
player_dialog(temp_dialog)
self.events()
self.draw()
def quit(self):
pg.quit()
sys.exit()

def draw(self):
pg.display.set_caption("{:.2f}".format(self.clock.get_fps()))
#if self.christopher_working_flag == True:
self.screen.fill(BLACK)
self.christopher_working.draw(self.screen, self.index % self.christopher_working.totalCellCount, HW, HH, CENTER_HANDLE)
self.screen = pg.transform.scale(self.screen,(1024, 768))
self.index += 1
print(self.index % self.christopher_working.totalCellCount)
pg.display.update()
def events(self):
# catch all events here
if self.christopher_working_flag == True:
spritesheet.events()
for event in pg.event.get():
if event.type == pg.QUIT:
self.quit()
if event.type == pg.KEYDOWN:
if event.key == pg.K_ESCAPE:
self.quit()
#def update(self):
#if self.player_health <= 0:  add this later

g = Game()
while True:
g.run()

我在这里和那里删除了几行，它们要么只是注释，要么是当前没有使用的代码(为了可读性和文章长度(。

当运行我的当前代码时，print函数显示我的self.index变量正在递增。。。但是我的精灵表一直在显示我的精灵的第一帧，从来没有前进过。我看不出这两种实现在功能上有什么不同。我知道我更改了某些变量的范围，但它们应该在需要时都可以访问。

有人能告诉我为什么这不起作用吗？我真的很感激！

Answer 1

删除self.screen=pg.transform.scale(self.screen，(1024768((解决了这个问题，我不完全确定原因。我的原始图像是640x345，我意识到这是一个疯狂的纵横比，但我仍然困惑于为什么转换似乎不起作用。