python-skier游戏，树和小旗只出现在窗口左边

Question

照写完 和孩子一起学编程 skier游戏，结果出现树和小旗只出现在窗口左边，有没有哪位朋友知道

Answer 1

要设置好它们的位置，也就是俗称的布局。
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import pygame, sys, random # 所需要加载的模块

skier_images = ["skier_down.png","skier_right1.png", #加载所需要的人物图像
"skier_right2.png","skier_left2.png",
"skier_left1.png"]

class SkierClass(pygame.sprite.Sprite):

def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("skier_down.png") # 获取人物图像
self.rect = self.image.get_rect() # 获取人物形象
self.rect.center = [320,100] # 人物的起始位置
self.angle = 0

def turn(self, direction): # 方向
self.angle = self.angle + direction # 角度+ 方向
if self.angle < -2: self.angle = -2 # 向左右只允许转2次
if self.angle > 2: self.angle = 2
center = self.rect.center
self.image = pygame.image.load(skier_images[self.angle])
self.rect = self.image.get_rect()
self.rect.center = center
speed = [self.angle, 10 - abs(self.angle) * 2] #左右移动后的速度
return speed

def move(self, speed): # 移动 左右移动
self.rect.centerx = self.rect.centerx + speed[0]
if self.rect.centerx < 20: self.rect.centerx = 20 #向左移动至 起始位置20 或向右移动至终止位置620
if self.rect.centerx > 620: self.rect.centerx = 620

class ObstacleClass (pygame.sprite.Sprite): #创建树和小旗
def __init__(self, image_file, location, type):
pygame.sprite.Sprite.__init__(self)
self.image_file = image_file
self.image = pygame.image.load(image_file)
self.location = location
self.rect = self.image.get_rect()
self.rect.center = location
self.type = type
self.passed = False

def scroll(self, terrainPos):
self.rect.centery = self.location[1] - terrainPos # 让场景向上移动

def create_map(start, end): # 创建一个“画面”地形：640×640.使用的64×64像素的“块”，这样的对象不是靠得太近
obstacles = pygame.sprite.Group()
locations = []
gates = pygame.sprite.Group()
for i in range(10): # 每屏10障碍
row = random.randint(start, end)
col = random.randint(0, 9)
location = [col * 64+20, row * 64+20]# 中心的x，y的障碍
if not (location in locations): # 避免在同一个地方2的障碍
locations.append(location)
type = random.choice(["tree", "flag"])
if type == "tree": img = "skier_tree.png" # 定义调用树的图
elif type == "flag": img = "skier_flag.png" # 定义调用旗的图
obstacle = ObstacleClass(img, location, type)
obstacles.add(obstacle)
return obstacles

def animate(): # 重绘屏幕，包括所有的元素
screen.fill([255, 255, 255]) #屏幕填充色
pygame.display.update(obstacles.draw(screen)) # 显示更新障碍
screen.blit(skier.image, skier.rect) #滑雪者图像
screen.blit(score_text, [10, 10]) # 比例
pygame.display.flip() #显示屏转动

def updateObstacleGroup(map0, map1):
obstacles = pygame.sprite.Group()
for ob in map0: obstacles.add(ob) #添加障碍
for ob in map1: obstacles.add(ob) #添加障碍
return obstacles

pygame.init() # 初始化示例
screen = pygame.display.set_mode([640,640]) # 初始化显示状态
clock = pygame.time.Clock() # 初始化时间
skier = SkierClass() # 初始化类型
speed = [0, 6] #初始化速度
map_position = 0
points = 0
map0 = create_map(20, 29) # 创建地图1
map1 = create_map(10, 19) # 创建地图2
activeMap = 0 # 激活地图
obstacles = updateObstacleGroup(map0, map1) #地图分数
font = pygame.font.Font(None, 50) # 所有障碍做碰撞检测

while True: # 开始地图循环
clock.tick(30) # 每秒更新地图的次数
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()
if event.type == pygame.KEYDOWN: # 检查按键
if event.key == pygame.K_LEFT: # 左箭头向左转
speed = skier.turn(-1)
elif event.key == pygame.K_RIGHT: # 右箭头向右转
speed = skier.turn(1)
skier.move(speed) # 移动滑雪者
map_position += speed[1] # 滚动场景

# 管理地图之间进行切换，并在底部创建新的地形
if map_position >=640 and activeMap == 0:
activeMap = 1
map0 = create_map(20, 29) # 创建地图
obstacles = updateObstacleGroup(map0, map1) # 更新地图障碍
if map_position >=1280 and activeMap == 1:
activeMap = 0
for ob in map0:
ob.location[1] = ob.location[1] - 1280 # 环绕顶部
map_position = map_position - 1280 # 地图位置
map1 = create_map(10, 19) # 创建地图
obstacles = updateObstacleGroup(map0, map1)

for obstacle in obstacles:
obstacle.scroll(map_position)

# 检查是否碰到数或小旗
hit = pygame.sprite.spritecollide(skier, obstacles, False)
if hit:
if hit[0].type == "tree" and not hit[0].passed: #撞到树
points = points - 100 # 撞树后扣掉100分
skier.image = pygame.image.load("skier_crash.png") # 创建跌倒图
animate()
pygame.time.delay(100)
skier.image = pygame.image.load("skier_down.png") # 恢复滑雪图
skier.angle = 0
speed = [0, 6]
hit[0].passed = True
elif hit[0].type == "flag" and not hit[0].passed: # 撞到旗子标志
points += 100 # 撞旗后加100分
obstacles.remove(hit[0]) # 删除旗子标志

score_text = font.render("Score: " +str(points), 1, (0, 0, 0))
animate()

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追问

谢谢你，其实好多天前我就发现了问题在哪，少写了一句self.rect.center=location，今天才看到你的答案，实在不好意思，还是要谢谢你的帮助。