Python Pygame相对于角色位置的滚动背景非常糟糕

我对编程和pygame都很陌生，这是我第一次尝试制作平台游戏。我遵循了一个关于如何制作滚动背景的教程，并尝试在我自己的代码中实现它。但它几乎不会运行，大多数时候角色会被随机卡住，我不知道如何和为什么

以下是该漏洞的视频：

这就是全部代码

import pygame, os
#from pygame import Vector2

#Images
BG = pygame.image.load(os.path.join("assets\Background.png"))
BG2 = pygame.image.load(os.path.join("assets\F38196.jpg"))
idle_mario = pygame.image.load(os.path.join('assets\player_animations\Bigidle\Bigidle_0.png'))
mario_run_0 = pygame.image.load(os.path.join('assets\player_animations\Bigrun\Bigrun_0.png'))
mario_run_1 = pygame.image.load(os.path.join('assets\player_animations\Bigrun\Bigrun_1.png'))
mario_run_2 = pygame.image.load(os.path.join('assets\player_animations\Bigrun\Bigrun_2.png'))
mario_jump = pygame.image.load(os.path.join('assets\player_animations\Bigjump\Bigjump_0.png'))
bgWidth, bgHeight = BG2.get_rect().size

#Classes
class Character:
    def __init__(self):
        self.x = 200
        self.x2 = 960
        self.y = 810
        self.ground = 810
        self.vel = 0
        #Idle image
        self.mario_idle = pygame.transform.scale(idle_mario, (70,140))
        #Running animation:
        self.mario_run_0 = pygame.transform.scale(mario_run_0, (70,140))
        self.mario_run_1 = pygame.transform.scale(mario_run_1, (70, 140))
        self.mario_run_2 = pygame.transform.scale(mario_run_2, (70, 140))
        self.mario_run_set = [self.mario_run_0, self.mario_run_0, self.mario_run_1, self.mario_run_1, self.mario_run_2,self.mario_run_2]
        self.i = 0
        #Jumping image:
        self.mario_jump = pygame.transform.scale(mario_jump, (70,140))

    def draw_character(self, idle, moving_right, moving_left, jumping):
        if jumping and moving_left is False:
            screen.blit(self.mario_jump, (self.x2, self.y))
        elif jumping and moving_left:
            screen.blit(pygame.transform.flip(self.mario_jump, True, False), (self.x2,self.y))
        elif idle:
            screen.blit(self.mario_idle, (self.x2,self.y))
        elif moving_right:
            screen.blit(self.mario_run_set[self.i], (self.x2,self.y))
            self.i += 1
            if self.i == 6:
                self.i = 0
        elif moving_left:
            screen.blit(pygame.transform.flip(self.mario_run_set[self.i], True, False), (self.x2,self.y))
            self.i += 1
            if self.i == 6:
                self.i = 0

class Stage:
    def __init__(self):
        self.width = bgWidth
        self.x = 0
        self.start_scroll = W / 2
        self.stop_scroll = self.width - self.start_scroll

class Main:
    def __init__(self):
        self.player = Character()
        self.stage = Stage()
        self.background = BG
        self.background2 = BG2
        self.bg_width = self.background2.get_rect().width
        self.ground = pygame.Rect(0,990,1920,20)
        self.move_right = False
        self.move_left = False
        self.idle = True
        self.is_jumping = False
        self.i = 1

    def draw(self):
        #pygame.draw.rect(screen, BROWN, self.ground)
        self.player.draw_character(self.idle, self.move_right, self.move_left, self.is_jumping)

#Config
W = 1920
H = 1020
pygame.init()
screen = pygame.display.set_mode((W,H))
pygame.display.set_caption("Lidl Adventures")
clock = pygame.time.Clock()

#Constants
BLACK = (0,0,0)
WHITE = (255,255,255)
BROWN = (137,94,39)
FPS = 60

#Functions

def main():
    true = True
    main = Main()
    while true:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                true = False
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_d:
                    main.move_right = True
                    main.move_left = False
                    main.idle = False
                    main.player.vel = 12
                if event.key == pygame.K_a:
                    main.move_left = True
                    main.move_right = False
                    main.idle = False
                    main.player.vel = -12
                if event.key == pygame.K_w or event.key == pygame.K_SPACE: #https://stackoverflow.com/questions/20940852/calculate-gravity-jump-in-pygame
                    main.is_jumping = True
            elif event.type == pygame.KEYUP:
                if event.key == pygame.K_d:
                    main.move_right = False
                    main.player.vel = 0
                if event.key == pygame.K_a:
                    main.move_left = False
                    main.player.vel = 0
                if main.move_left is False and main.move_right is False:
                    main.idle = True

        if main.is_jumping:
            v = 40-4*main.i
            main.player.y -= v
            main.i += 1
            if main.player.y == main.player.ground: #or main.player.y = main.player.object:
                main.is_jumping = False
                main.i = 1

        main.player.x += main.player.vel
        print(main.player.x)
        if main.player.x > main.stage.width - 70: main.player.x = main.stage.width - 70
        if main.player.x < 10: main.player.x = 10
        if main.player.x < main.stage.start_scroll: main.player.x2 = main.player.x
        elif main.player.x > main.stage.stop_scroll: main.stage.x2 = main.player.x - main.stage.width + W
        else:
            main.player.x2 = main.stage.start_scroll
            main.stage.x += -main.player.vel

        rel_x = main.stage.x % main.bg_width
        screen.blit(main.background2, (rel_x - main.bg_width, 0))
        if rel_x < W:
            screen.blit(main.background2, (rel_x, 0))

        main.draw()
        pygame.display.update()
        clock.tick(FPS)

if __name__ == "__main__":
    main()

导入pygame，操作系统
#从pygame导入向量2
#图像
BG=pygame.image.load（os.path.join（“assets\Background.png”））
BG2=pygame.image.load（os.path.join（“assets\F38196.jpg”））
idle\u mario=pygame.image.load（os.path.join（'assets\player\u animations\Bigidle\Bigidle\u 0.png'））
mario\u run\u 0=pygame.image.load（os.path.join（'assets\player\u animations\Bigrun\Bigrun\u 0.png'））
mario\u run\u 1=pygame.image.load（os.path.join（'assets\player\u animations\Bigrun\Bigrun\u 1.png'））
mario\u run\u 2=pygame.image.load（os.path.join（'assets\player\u animations\Bigrun\Bigrun\u 2.png'））
mario\u jump=pygame.image.load（os.path.join（'assets\player\u animations\Bigjump\Bigjump\u 0.png'））
bgWidth，bgHeight=BG2.get_rect（）.size
#班级
类别字符：
定义初始化（自）：
self.x=200
self.x2=960
self.y=810
self.ground=810
self.vel=0
#空闲映像
self.mario_idle=pygame.transform.scale（idle_mario，（70140））
#运行动画：
self.mario_run_0=pygame.transform.scale（mario_run_0，（70140））
self.mario_run_1=pygame.transform.scale（mario_run_1，（70140））
self.mario_run_2=pygame.transform.scale（mario_run_2，（70140））
self.mario_run_set=[self.mario_run_0，self.mario_run_0，self.mario_run_1，self.mario_run_2，self.mario_run_2]
self.i=0
#跳转图像：
self.mario_jump=pygame.transform.scale（mario_jump，（70140））
def draw_字符（自身、空闲、向右移动、向左移动、跳跃）：
如果跳跃和向左移动为False：
screen.blit（self.mario_jump，（self.x2，self.y））
elif跳跃并向左移动：
screen.blit（pygame.transform.flip（self.mario_jump，True，False），（self.x2，self.y））
elif空闲：
screen.blit（self.mario_idle，（self.x2，self.y））
elif向右移动：
blit（self.mario\u run\u set[self.i]，（self.x2，self.y））
self.i+=1
如果self.i==6：
self.i=0
elif向左移动：
blit（pygame.transform.flip（self.mario\u run\u set[self.i]，True，False），（self.x2，self.y））
self.i+=1
如果self.i==6：
self.i=0
班级阶段：
定义初始化（自）：
self.width=bgWidth
self.x=0
self.start_scroll=W/2
self.stop\u scroll=self.width-self.start\u scroll
班长：
定义初始化（自）：
self.player=Character（）
self.stage=stage（）
self.background=BG
self.background2=BG2
self.bg_width=self.background2.get_rect（）.width
self.ground=pygame.Rect（09901920,20）
self.move_right=False
self.move_left=False
self.idle=True
self.is_jumping=False
self.i=1
def牵引（自）：
#pygame.draw.rect（屏幕、棕色、自我、地面）
self.player.draw_角色（self.idle，self.move_right，self.move_left，self.is_jumping）
#配置
W=1920
H=1020
pygame.init（）
screen=pygame.display.set_模式（（W，H））
pygame.display.set_标题（“Lidl冒险”）
clock=pygame.time.clock（）
#常数
黑色=（0,0,0）
白色=（255255）
布朗=（137,94,39）
FPS=60
#功能
def main（）：
真的
main=main（）
尽管如此：
对于pygame.event.get（）中的事件：
如果event.type==pygame.QUIT：
真=假
如果event.type==pygame.KEYDOWN：
如果event.key==pygame.K\u d：
main.move_right=True
main.move_left=False
main.idle=False
main.player.vel=12
如果event.key==pygame.K_a：
main.move_left=True
main.move_right=False
main.idle=False
main.player.vel=-12
如果event.key==pygame.K_w或event.key==pygame.K_空间：#https://stackoverflow.com/questions/20940852/calculate-gravity-jump-in-pygame
main.is_jumping=True
elif event.type==pygame.KEYUP:
如果event.key==pygame.K\u d：
main.move_right=False
main.player.vel=0
如果event.key==pygame.K_a：
main.move_left=False
main.player.vel=0
如果main.move_left为False，main.move_right为False：
main.idle=True
如果main.u正在跳跃：
v=40-4*main.i
main.player.y-=v
main.i+=1
如果main.player.y==main.player.ground:#或main.player.y=main.player.object:
main.is_jumping=False
main.i=1
main.player.x+=main.player.vel
打印（main.player.x）
如果main.player.x>main.stage.width-70:main.player.x=main.stage.width-70
如果main.player.x<10:main.player.x=10
如果main.player.xmain.stage.stop\u滚动：main.stage.x2=main.player.x-main.stage.width+W
其他：
main.player.x2=main.stage.start\u滚动
main.stage.x+=-main.player.vel
rel_x=main.stage.x%main.bg_宽度
屏幕.blit（main.background2，（rel_x-main.bg_宽度，0））
如果rel_x        if main.player.x > main.stage.width - 70: main.player.x = main.stage.width - 70
        if main.player.x < 10: main.player.x = 10
        if main.player.x < main.stage.start_scroll: main.player.x2 = main.player.x
        elif main.player.x > main.stage.stop_scroll: main.stage.x2 = main.player.x - main.stage.width + W
        else:
            main.player.x2 = main.stage.start_scroll
            main.stage.x += -main.player.vel

        rel_x = main.stage.x % main.bg_width
        screen.blit(main.background2, (rel_x - main.bg_width, 0))
        if rel_x < W:
            screen.blit(main.background2, (rel_x, 0))

def main():
    true = True
    main = Main()
    while true:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                true = False
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_d:
                    main.move_right = True
                    main.move_left = False
                    main.idle = False
                    main.player.vel = 12
                if event.key == pygame.K_a:
                    main.move_left = True
                    main.move_right = False
                    main.idle = False
                    main.player.vel = -12
                if event.key == pygame.K_w or event.key == pygame.K_SPACE:  # https://stackoverflow.com/questions/20940852/calculate-gravity-jump-in-pygame
                    main.is_jumping = True
            elif event.type == pygame.KEYUP:
                if event.key == pygame.K_d:
                    main.move_right = False
                    if main.move_left:
                        pass
                    else:
                        main.player.vel = 0
                if event.key == pygame.K_a:
                    main.move_left = False
                    if main.move_right:
                        pass
                    else:
                        main.player.vel = 0
        if main.move_left is False and main.move_right is False:
            main.idle = True
            main.player.vel = 0

        if main.is_jumping:
            v = 40 - 4 * main.i
            main.player.y -= v
            main.i += 1
            print(v)
            if main.player.y == main.player.ground:  # or main.player.y = main.player.object:
                main.is_jumping = False
                main.i = 1

        if main.move_right or main.move_left:
            main.player.x += main.player.vel
            print(main.player.x)

        if main.player.x > main.stage.width - 70: main.player.x = main.stage.width - 70
        if main.player.x < 10: main.player.x = 10
        if main.player.x < main.stage.start_scroll: main.player.x2 = main.player.x
        elif main.player.x > main.stage.stop_scroll: main.player.x2 = main.player.x - main.stage.width + W
        else:
            main.player.x2 = main.stage.start_scroll
            main.stage.x += -main.player.vel

        rel_x = main.stage.x % main.bg_width
        screen.blit(main.background, (rel_x - main.bg_width, 0))
        if rel_x < W:
            screen.blit(main.background, (rel_x, 0))

        main.draw()
        pygame.display.update()
        clock.tick(FPS)


if __name__ == "__main__":
    main()