本文主要是写的一个贪吃蛇小游戏 目前还没有计分效果
from abc import ABCMeta,abstractmethod from random import randint import pygame GREEN_COLOR =(0,0,255) UP = 0 RIGHT = 1 DOWN = 2 LEFT = 3 # 顺时针顺序设置 class Gameobject(object,metaclass=ABCMeta): def __init__(self,x=0,y=0,color =(0, 0, 0) ): self._x = x self._y = y self._color = color @property def x(self): return self._x @property def y(self): return self._y @abstractmethod def draw(self,screen): pass class Wall(Gameobject): def __init__(self,x,y,hight,width,color =(0,0,0)): # pos 元组 一个点 super().__init__(x, y, color) self._hight = hight self._width = width # 默认颜色为黑色 # 初始化 @property def width(self): return self._width @property def hight(self): return self._hight def draw(self,screen): # 1 画围墙 4 是像素 pygame.draw.rect(screen,self._color, (self._x,self._y,self._width,self._hight),4) class Food(Gameobject): def __init__(self,x,y,size,color=(255,189,0)): super().__init__(x,y,color) self._size =size self._hidden = False def draw(self,screen): if not self._hidden: # 闪烁 pygame.draw.circle(screen,self._color, (self._x+self._size//2,self._y + self._size//2 ),self._size//2,0) # x y是起点位置 size是半径 self._hidden = not self._hidden # 闪烁 class SnakeNode(Gameobject): def __init__(self,x,y,size,color=GREEN_COLOR): super().__init__(x,y,color) self._size = size @property def size(self): return self._size def draw(self,screen): # 画矩形 pygame.draw.rect(screen,self._color,(self._x,self._y,self._size,self._size),0) pygame.draw.rect(screen, (0,0,0), (self._x, self._y, self._size, self._size), 1) class Snake(Gameobject): ## 如果能使用强关联关系，就不要考虑继承关系 def __init__(self): super().__init__() self._dir = LEFT # 蛇的方向 self._nodes = [] self._alive = True for index in range(5): node = SnakeNode(290 + index * 20 ,290,20) # 蛇的第一个节点 方向 self._nodes.append(node) # 容器 @property def dir(self): return self._dir @property def alive(self): return self._alive @property def head(self): return self._nodes[0] def change_dir(self,new_dir): # 蛇跑的方向转变 if (self._dir + new_dir) % 2 != 0: self._dir = new_dir def move(self): if self._alive: snake_dir = self._dir # 蛇的移动 x,y,size = self.head.x,self.head.y,self.head.size if snake_dir == UP: y -= size # 往上跑 elif snake_dir == RIGHT: x += size # 往右跑 elif snake_dir == DOWN: y += size else : x -= size new_head = SnakeNode(x,y,size) self._nodes.insert(0,new_head) self._nodes.pop() # 删除最后一节 def collide(self,wall): # 判断撞墙 """ :param wall: 围墙 :return: 撞到围墙返回真 否则返回假 """ head = self.head if head.x < wall.x or head.x + head.size > wall.x + wall.width or head.y < wall.y\ or head.y + head.size > wall.y + wall.hight: self._alive =False def eat_food(self,food): ## 吃食物 if self.head.x == food.x and self.head.y == food.y: tail = self._nodes[-1] self._nodes.append(tail) return True return False # 增加一个记分功能 def eat_me(self): # 咬到自己 pass def draw(self,screen): for node in self._nodes: node.draw(screen) def main(): def refresh(): ## 函数里面在定义函数 （嵌套） """刷新游戏窗口""" screen.fill((242, 242, 242)) wall.draw(screen) # 3传个消息 在屏幕是画 food.draw(screen) snake.draw(screen) pygame.display.flip() def handle_key_event(key_event): """处理按键事件""" key = key_event.key if key == pygame.K_F2: reset_game() else: if snake.alive: new_dir =snake.dir if key == pygame.K_w: new_dir = UP elif key == pygame.K_d: new_dir = RIGHT elif key == pygame.K_s: new_dir = DOWN elif key == pygame.K_a: new_dir = LEFT if new_dir != snake.dir: snake.change_dir(new_dir) def create_food(): ##随机生成一个食物点 row = randint(0,29) col = randint(0,29) return Food(10 + 20 * col ,10 + 20 * row ,20) def reset_game(): nonlocal food,snake ## 作用域 有这个才能F2 重新刷新 food = create_food() snake = Snake() wall = Wall(10,10,600,600) # 2创建围墙对象 food =create_food() snake = Snake() pygame.init() screen = pygame.display.set_mode((620, 620)) # 窗口大小 620个像素（620个点） pygame.display.set_caption('贪吃蛇') screen.fill((242,242,242)) # 必须两个括号 里面 放元组 或列表的意思 pygame.display.flip() clock = pygame.time.Clock() running = True while running: # 循环 把窗口保留着 发生键盘鼠标事件就进行处理 for event in pygame.event.get(): if event.type == pygame.QUIT: running = False elif event.type == pygame.KEYDOWN: handle_key_event(event) if snake.alive: refresh() # 4刷新界面 clock.tick(6) # 20帧/1s if snake.alive: snake.move() snake.collide(wall) if snake.eat_food(food): food = create_food() pygame.quit() if __name__ == '__main__': main()