import pygame, sys, random

skier_images = ["./bg_img/skier_down.png", "./bg_img/skier_right1.png", "./bg_img/skier_right2.png",

"./bg_img/skier_left2.png", "./bg_img/skier_left1.png"]

class SkierClass(pygame.sprite.Sprite):

def __init__(self):

pygame.sprite.Sprite.__init__(self)

self.image = pygame.image.load("./bg_img/skier_down.png")

self.rect = self.image.get_rect()

self.rect.center = [320, 100]

self.angle = 0

def turn(self, direction):

self.angle = self.angle + direction

if self.angle < -2: self.angle = -2

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, 6 - abs(self.angle) * 2]

return speed

def move(self, speed):

self.rect.centerx = self.rect.centerx + speed[0]

if self.rect.centerx < 20: self.rect.centerx = 20

if self.rect.centerx > 620: self.rect.centerx = 620

class ObstacleClass(pygame.sprite.Sprite):

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

def create_map(start, end):

obstacles = pygame.sprite.Group()

locations = []

gates = pygame.sprite.Group()

for i in range(10):

row = random.randint(start, end)

col = random.randint(0, 9)

location = [col * 64 + 20, row * 64 + 20]

if not (location in locations):

locations.append(location)

type = random.choice(["tree", "flag"])

if type == "tree": img = "./bg_img/skier_tree.png"

elif type == "flag": img = "./bg_img/skier_flag.png"

obstacle = ObstacleClass(img, location, type)

obstacles.add(obstacle)

return obstacles

def animate():

screen.fill([255, 255, 255])

pygame.display.update(obstacles.draw(screen))

screen.blit(skier.image, skier.rect)

screen.blit(score_text, [10, 10])

pygame.display.flip()

def updateObstacleGroup(map0, map1):

obstacles = pygame.sprite.Group()

for ob in map0: obstacles.add(ob)

for ob in map1: obstacles.add(ob)

return obstacles

pygame.init()

pygame.mixer.init()

pygame.mixer.music.load("./bg_music/bg_music.mp3")

pygame.mixer.music.set_volume(0.3)

pygame.mixer.music.play(-1)

screen = pygame.display.set_mode([640,640])

clock = pygame.time.Clock()

skier = SkierClass()

speed = [0, 6]

map_position = 0

points = 0

map0 = create_map(20, 29)

map1 = create_map(10, 19)

activeMap = 0

obstacles = updateObstacleGroup(map0, map1)

font = pygame.font.Font(None, 50)

while True:

clock.tick(30)

for event in pygame.event.get():

if event.type == pygame.QUIT: sys.exit()

if event.type == pygame.KEYDOWN:

if event.key == pygame.K_LEFT:

speed = skier.turn(-1)

elif event.key == pygame.K_RIGHT:

speed = skier.turn(1)

skier.move(speed)

map_position += speed[1]

if map_position >=640 and activeMap == 0:

activeMap = 1

map0 = create_map(20, 29)

obstacles = updateObstacleGroup(map0, map1)

if map_position >=1280 and activeMap == 1:

activeMap = 0

for ob in map0:

ob.location[1] = ob.location[1] - 1280

map_position = map_position - 1280

map1 = create_map(10, 19)

obstacles = updateObstacleGroup(map0, map1)

for obstacle in obstacles:

obstacle.scroll(map_position)

hit = pygame.sprite.spritecollide(skier, obstacles, False)

if hit:

if hit[0].type == "tree" and not hit[0].passed:

points = points - 100

skier.image = pygame.image.load("./bg_img/skier_crash.png")

animate()

pygame.time.delay(1000)

skier.image = pygame.image.load("./bg_img/skier_down.png")

skier.angle = 0

speed = [0, 6]

hit[0].passed = True

elif hit[0].type == "flag" and not hit[0].passed:

points += 10

obstacles.remove(hit[0])

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

animate()