Как прокрутить камеру Python Pygame

Question

У меня есть этот класс камеры, над которым я работаю и пытаюсь заставить камеру следовать за игроком и прокручивать фон.Я смотрел десятки видео на YouTube и читал похожие вопросы на SO, но я застрял здесь, вот исходный код: (main.py)

import pygame
import player
import enemy
import environment
import collision as collision
import camera

pygame.init()

size = WIDTH, HEIGHT = (640, 480)
screen = pygame.display.set_mode(size)

pygame.display.set_caption("Game 2")

FPS = 60
fpsclock = pygame.time.Clock()

player.player1 = player.player(300, 410, 32, 32)
player.player1.initialize()

enemyVector = []
enemy.enemy1 = enemy.enemy(160, 170, 32, 32)
enemy.enemy1.initialize()
enemyVector.append(enemy.enemy1)

environmentVector = []
#environment.environment1.load_map(environmentVector)




counter1 = 0
counter2 = 0
string = ''
with open('map.txt', 'r') as f:
    for line in f:
        for character in line:
            if character == '0':
                pass
            elif character == '1':
                environment.environment1 = environment.environment(160, 100, 32, 32)
                environmentVector.append(environment.environment1)
                environmentVector[-1].x = counter1 * 32
                environmentVector[-1].y = counter2 * 32
            counter1 += 1
        counter1 = 0
        counter2 += 1

print(environmentVector[1].x)

run = True
while run:
    pygame.time.delay(50)

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

keys = pygame.key.get_pressed()

if player.player1.active:
    player.player1.frame += 1
if player.player1.frame >= 2:
    player.player1.frame = 0

for i in enemyVector:
    if i.ready_to_move():
        i.move()
    if i.ready_to_animate():
        i.animate()

player.player1.playerImage = player.player1.cells[player.player1.frame + player.player1.animation]



for i in enemyVector:
    i.enemyImage = i.cells[i.frame + i.animation]

if keys[pygame.K_LEFT] and player.player1.canMoveLeft and player.player1.x > player.player1.vel:
    player.player1.x -= player.player1.vel
    player.player1.animation = 3
    player.player1.active = True
elif keys[pygame.K_RIGHT] and player.player1.canMoveRight and player.player1.x < 640 - player.player1.width - player.player1.vel:
    player.player1.x += player.player1.vel
    player.player1.animation = 6
    player.player1.active = True
elif keys[pygame.K_UP] and player.player1.canMoveUp and player.player1.y > player.player1.vel:
    player.player1.y -= player.player1.vel
    player.player1.animation = 9
    player.player1.active = True
elif keys[pygame.K_DOWN] and player.player1.canMoveDown and player.player1.y < 480 - player.player1.height - player.player1.vel:
    player.player1.y += player.player1.vel
    player.player1.animation = 0
    player.player1.active = True
elif keys[pygame.K_s]:
    player.player1.attack = True
    player.player1.animation = 12
else:
    player.player1.active = False


collision.check_collision_enemy(enemyVector, environmentVector)
collision.check_collision_player(player.player1, environmentVector)



player.player1.update_xy()

enemy.enemy1.update_xy()

for i in environmentVector:
    i.update_xy()


screen.fill((0, 0, 0))

for i in enemyVector:
    screen.blit(i.enemyImage, (i.x, i.y))

screen.blit(player.player1.playerImage, (player.player1.x, player.player1.y))


for i in environmentVector:
    pygame.draw.rect(screen, (255,255,255), (i.x, i.y, 32, 32))

pygame.display.flip()
fpsclock.tick(FPS)

pygame.quit()

(camera.py):

class Camera:
    def __init__(self, players):
        self.left_viewbox = display_width/2 - display_width/8
        self.right_viewbox = display_width/2 + display_width/10

    def follow(self, shift_x):
        virtualwindow.x += shift_x
        print virtualwindow.x
        for i in players:   
            i.rect.x += shift_x

    def viewbox(self):
        if player.x <= self.left_viewbox:
            view_difference = self.left_viewbox - player.x
            player.x = self.left_viewbox
            self.follow(view_difference)

        if player.x >= self.right_viewbox:
            view_difference = self.right_viewbox - player.x
            player.x = self.right_viewbox
            self.follow(view_difference)

howможет ли этот класс камеры быть изменен и реализован так, чтобы камера следовала за игроком и прокручивала список записей на заднем плане