利用Python写一个滑雪小游戏教程

游戏逻辑：用户通过键盘方向键"←"与"→"进行滑雪者的左右运动，碰到小旗子得10分，碰到树扣100分。

程序包含以下图形：
skier_dowm.png：初始滑雪者形象
skier_crash.png：碰撞到树后的形象
skier_left1.png
skier_left2.png:滑雪者向左运动的形象
skier_right1.png
skier_right2.png:滑雪者向右运动的形象
skier_tree.png：树的形象
skier_flag.png:小旗子的形象

import pygame,sys,random
skier_images= ["skier_down.png","skier_right1.png","skier_right2.png","skier_left1.png","skier_left2.png"]
class SkierClass(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load("skier_down.png")
        self.rect = self.image.get_rect()
        self.rect.center = [320,100]
        self.angle = 0        
        # 创建滑雪者
    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        
        # 滑雪者转向方法
    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           
        # 滑雪者移动方法
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.rect = self.image.get_rect()
        self.rect.center = location
        self.type = type
        self.passed = False       
        # 创建树和小旗子
    def update(self):
        global speed
        self.rect.centery -= speed[1] # 屏幕向上滚动
        if self.rect.centery <-32:
            self.kill() # 删除从屏幕上方滚下的障碍物
def create_map():
    global obstacles
    locations = []
    for i in range(10):
        row = random.randint(0,9)
        col = random.randint(0,9)
        location = [col *64 +20,row*64+20+640]
        if not (location in locations):
            locations.append(location)
            type = random.choice(["tree","flag"])
            if type == "tree":
                img = "skier_tree.png"
            elif type == "flag":
                img = "skier_flag.png"
            obstacle = ObstacleClass(img,location,type)
            obstacles.add(obstacle)        
    # 创建窗口，并包含树与小旗子
def animate():
    screen.fill([255,255,255])
    obstacles.draw(screen)
    screen.blit(skier.image,skier.rect)
    screen.blit(score_text,[10,10])
    pygame.display.flip()    
    # 重新绘制画面
pygame.init()
screen = pygame.display.set_mode([640,640])
clock = pygame.time.Clock()
skier = SkierClass()
speed = [0,6]
obstacles = pygame.sprite.Group()
map_position = 0
points = 0
create_map()
font = pygame.font.Font(None,50)
# 准备画面
running = True
while running: # 主循环
    clock.tick(30) # 每秒更新30次图形
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        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)
        # 检索用户输入
    skier.move(speed) # 移动滑雪者
    map_position += speed[1] # 滚动场景
    if map_position >= 640 :
        create_map()
        map_position = 0
        # 创建新场景
    hit = pygame.sprite.spritecollide(skier,obstacles,False)
    if hit:
        if hit[0].type == "tree" and not hit[0].passed:
            points -=100
            skier.image = pygame.image.load("skier_crash.png")
            score_text = font.render("Score:" +str(points),1,(0,0,0))
            pygame.time.delay(100)
            skier.iamge = pygame.image.load("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
            hit[0].kill()
        # 检测是否碰到树或者小旗子
    obstacles.update()
    score_text = font.render("Score:" +str(points),1,(0,0,0)) # 显示得分
    animate()

pygame.quit()

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