与孩子一起学编程10章

这一次，来个有意思的小游戏

滑雪游戏，树是障碍物，拿到旗子有奖励，运行文件需要几个图片

上传在这儿，滑雪者，旗子，树，还有滑雪者左方向的两个，第一个，第二个，有方向的两个，第一个，第二个，滑雪者碰撞树的图片。图片的名称和代码里要一致。

代码如下

# encoding=utf-8
# 与孩子一起学编程10章
# Skier 代码清单 10-1
# 2013年8月31日10:08:25

import pygame, sys, random

skier_image = ["skier_down.png", "skier_right1.png", "skier_right2.png",
                "skier_left2.png", "skier_left1.png"]

    # 创建滑雪者
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

    # 滑雪者转向
    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_image[self.angle])
        self.rect = self.image.get_rect()
        self.rect.center = center
        speed = [self.angle, 6 - abs(self.angle) * 2]
        return speed

    # 滑雪者左右移动
    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):
    # 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

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

def create_map(start, end):
    # 创建一个窗口，包含随机的树和小旗
    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 = "skier_tree.png"
            elif type == "flag":  img = "skier_flag.png"
            obstacle = ObstacleClass(img, location, type)
            obstacles.add(obstacle)
    return obstacles

def animate():
    # 有移动时重绘屏幕
    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):
    # 切换到场景的下一屏
    obstacles = pygame.sprite.Group()
    for ob in map0:  obstacles.add(ob)
    for ob in map1:  obstacles.add(ob)
    return obstacles

# 做好准备
pygame.init()
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)


# 开始主循环
while True:
    clock.tick(30)  # 每秒更新30次图形
    # 检查按键或窗口是否关闭
    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)  # 移动滑雪者
    map_position += speed[1]  # 滚动场景

    # 从场景的一个窗口切换到下一个窗口
    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)


    # 检查是否碰到树或得到小旗
    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("skier_crash.png")
            animate()
            pygame.time.delay(1000)
            skier.image = 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
            obstacles.remove(hit[0])

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