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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("c:\\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()