闯关游戏人物卡进地图

Question

地图移动时为什么人物会卡进地图，地图不移动人物移动就不会卡进地图（请求讲解）

import pygame
import sys
import find

pygame.init()

file = find.File()
data = file.read()
photo = find.data
level = file.read('code/data/level.dat')

class Game:
    def __init__(self, x, y):
        self.screen = pygame.display.set_mode((x, y))
        pygame.display.set_caption('Pixel Level Game')
        self.font = pygame.font.Font(pygame.font.match_font('comicsansms'), 36)
        self.hero = pygame.image.load('code/images/hero.png')
        self.hero_x = 0
        self.hero_y = 550
        self.mask_map = []
        self.mask_map_pos = []
        self.venom_mask = []
        self.venom_mask_pos = []
        self.level = level
        self.speed = 0
        self.map_x = 0
        self.map_move = False
        self.down = 0
        self.up = False
        self.over = False

    def map_draw(self):
        self.mask_map = []
        self.venom_mask = []
        self.mask_map_pos = []
        self.venom_mask_pos = []
        for p in photo:
            for pos in data[self.level][p]:
                image = pygame.image.load('code/images/Tiles/' + p)
                self.screen.blit(image, (pos[0] - self.map_x, pos[1]))
                if 'brick' in p or 'ConveyorBelt' in p or 'IronBlock' in p or 'IronPlate' in p or 'pipe' in p:
                    self.mask_map.append(pygame.mask.from_surface(image))
                    self.mask_map_pos.append((pos[0] - self.map_x, pos[1]))
                elif 'venom' in p:
                    self.venom_mask.append(pygame.mask.from_surface(image))
                    self.venom_mask_pos.append((pos[0] - self.map_x, pos[1]))

    def level_draw(self):
        w, h = self.font.size('Level: ' + str(self.level + 1))
        self.screen.blit(self.font.render('Level: ' + str(self.level + 1), True, (240, 190, 0)), (405 - w / 2, 0))

    def over_draw(self):
        w, h = self.font.size('Game Over!')
        self.screen.blit(self.font.render('Game Over!', True, 'red'), (405 - w / 2, 315 - h / 2))

    def Vic(self):
        global level
        win = True
        for p in photo:
            for pos in data[self.level][p]:
                if pos[0] > self.hero_x:
                    win = False
        if win:
            level += 1
            if len(data) < self.level:
                file.into(self.level, 'code/data/level.dat')
                sys.exit()
            self.__init__(810, 630)

    def draw(self):
        self.screen.fill((80, 190, 220))
        self.map_draw()
        self.screen.blit(self.hero, (self.hero_x, self.hero_y))
        if self.over:
            self.over_draw()
        self.level_draw()

    def keys(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                file.into(self.level, 'code/data/level.dat')
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT and not self.over:
                    self.speed = -3
                elif event.key == pygame.K_RIGHT and not self.over:
                    self.speed = 3
                elif event.key == pygame.K_UP and not self.up and not self.over:
                    self.down = -3
                    self.up = True
                elif event.key == pygame.K_SPACE and self.over:
                    self.__init__(810, 630)
            elif event.type == pygame.KEYUP:
                self.speed = 0
        number = 0
        if not self.map_move:
            self.hero_x += self.speed
            for m in self.mask_map:
                if m.overlap(pygame.mask.from_surface(self.hero), (self.hero_x - self.mask_map_pos[number][0], self.hero_y - self.mask_map_pos[number][1])):
                    self.hero_x -= self.speed
                number += 1
            if self.hero_x >= 398:
                self.map_move = True
        elif self.map_move:
            number = 0
            self.map_x += self.speed
            for m in self.mask_map:
                if m.overlap(pygame.mask.from_surface(self.hero), (self.hero_x - self.mask_map_pos[number][0], self.hero_y - self.mask_map_pos[number][1])):
                    self.map_x -= (self.speed * 1.1)
                    self.speed = 0
                number += 1
        self.hero_y += self.down
        number = 0
        for m in self.mask_map:
            if m.overlap(pygame.mask.from_surface(self.hero), (self.hero_x - self.mask_map_pos[number][0], self.hero_y - self.mask_map_pos[number][1])):
                self.hero_y -= self.down
                if self.up and self.down > 0:
                    self.up = False
            number += 1
        number = 0
        for v in self.venom_mask:
            if v.overlap(pygame.mask.from_surface(self.hero), (self.hero_x - self.venom_mask_pos[number][0], self.hero_y - self.venom_mask_pos[number][1])):
                self.over = True
            number += 1
        self.down += 0.1

    @staticmethod
    def update():
        Clock = pygame.time.Clock()
        Clock.tick(60)
        pygame.display.update()


game = Game(810, 630)
def main():
    while True:
        game.draw()
        game.keys()
        game.update()


if __name__ == '__main__':
    main()

Answer 1

什么叫卡进地图？是人跟着地图一起动吗