PyGame贪吃蛇的实现代码示例

做个内心向阳的人。不忧伤,不心急。坚强向上,心向阳光。向前迈进。——松下幸之助抽出时间去学习,凡事从小做起,不怕单调和重复,长期的积累坚持,想不成功,也难。

最近帮人做了个贪吃蛇的游戏(交作业用),很简单,界面如下:

开始界面:

游戏中界面:

是不是很简单、朴素。(欢迎大家访问GitHub)

游戏是基于PyGame框架制作的,程序核心逻辑如下:

  • 游戏界面分辨率是640*480,蛇和食物都是由1个或多个20*20像素的正方形块儿(为了方便,下文用点表示20*20像素的正方形块儿)组成,这样共有32*24个点,使用pygame.draw.rect来绘制每一个点;
  • 初始化时蛇的长度是3,食物是1个点,蛇初始的移动的方向是右,用一个数组代表蛇,数组的每个元素是蛇每个点的坐标,因此数组的第一个坐标是蛇尾,最后一个坐标是蛇头;
  • 游戏开始后,根据蛇的当前移动方向,将蛇运动方向的前方的那个点append到蛇数组的末位,再把蛇尾去掉,蛇的坐标数组就相当于往前挪了一位;
  • 如果蛇吃到了食物,即蛇头的坐标等于食物的坐标,那么在第2点中蛇尾就不用去掉,就产生了蛇长度增加的效果;食物被吃掉后,随机在空的位置(不能与蛇的身体重合)再生成一个;
  • 通过PyGame的event监控按键,改变蛇的方向,例如当蛇向右时,下一次改变方向只能向上或者向下;
  • 当蛇撞上自身或墙壁,游戏结束,蛇头装上自身,那么蛇坐标数组里就有和舌头坐标重复的数据,撞上墙壁则是蛇头坐标超过了边界,都很好判断;
  • 其他细节:做了个开始的欢迎界面;食物的颜色随机生成;吃到实物的时候有声音提示等。

代码:

#!/usr/bin/env python 
# -*- coding:utf-8 -*- 

""" 
@version: v1.0 
@author: Harp
@contact: liutao25@baidu.com 
@software: PyCharm 
@file: MySnake.py 
@time: 2018/1/15 0015 23:40 
"""


import pygame
from os import path
from sys import exit
from time import sleep
from random import choice
from itertools import product
from pygame.locals import QUIT, KEYDOWN


def direction_check(moving_direction, change_direction):
  directions = [['up', 'down'], ['left', 'right']]
  if moving_direction in directions[0] and change_direction in directions[1]:
    return change_direction
  elif moving_direction in directions[1] and change_direction in directions[0]:
    return change_direction
  return moving_direction


class Snake:

  colors = list(product([0, 64, 128, 192, 255], repeat=3))[1:-1]

  def __init__(self):
    self.map = {(x, y): 0 for x in range(32) for y in range(24)}
    self.body = [[100, 100], [120, 100], [140, 100]]
    self.head = [140, 100]
    self.food = []
    self.food_color = []
    self.moving_direction = 'right'
    self.speed = 4
    self.generate_food()
    self.game_started = False

  def check_game_status(self):
    if self.body.count(self.head) > 1:
      return True
    if self.head[0] < 0 or self.head[0] > 620 or self.head[1] < 0 or self.head[1] > 460:
      return True
    return False

  def move_head(self):
    moves = {
      'right': (20, 0),
      'up': (0, -20),
      'down': (0, 20),
      'left': (-20, 0)
    }
    step = moves[self.moving_direction]
    self.head[0] += step[0]
    self.head[1] += step[1]

  def generate_food(self):
    self.speed = len(self.body) // 16 if len(self.body) // 16 > 4 else self.speed
    for seg in self.body:
      x, y = seg
      self.map[x//20, y//20] = 1
    empty_pos = [pos for pos in self.map.keys() if not self.map[pos]]
    result = choice(empty_pos)
    self.food_color = list(choice(self.colors))
    self.food = [result[0]*20, result[1]*20]


def main():
  key_direction_dict = {
    119: 'up', # W
    115: 'down', # S
    97: 'left', # A
    100: 'right', # D
    273: 'up', # UP
    274: 'down', # DOWN
    276: 'left', # LEFT
    275: 'right', # RIGHT
  }

  fps_clock = pygame.time.Clock()
  pygame.init()
  pygame.mixer.init()
  snake = Snake()
  sound = False
  if path.exists('eat.wav'):
    sound_wav = pygame.mixer.Sound("eat.wav")
    sound = True
  title_font = pygame.font.SysFont('arial', 32)
  welcome_words = title_font.render('Welcome to My Snake', True, (0, 0, 0), (255, 255, 255))
  tips_font = pygame.font.SysFont('arial', 24)
  start_game_words = tips_font.render('Click to Start Game', True, (0, 0, 0), (255, 255, 255))
  close_game_words = tips_font.render('Press ESC to Close', True, (0, 0, 0), (255, 255, 255))
  gameover_words = title_font.render('GAME OVER', True, (205, 92, 92), (255, 255, 255))
  win_words = title_font.render('THE SNAKE IS LONG ENOUGH AND YOU WIN!', True, (0, 0, 205), (255, 255, 255))
  screen = pygame.display.set_mode((640, 480), 0, 32)
  pygame.display.set_caption('My Snake')
  new_direction = snake.moving_direction
  while 1:
    for event in pygame.event.get():
      if event.type == QUIT:
        exit()
      elif event.type == KEYDOWN:
        if event.key == 27:
          exit()
        if snake.game_started and event.key in key_direction_dict:
          direction = key_direction_dict[event.key]
          new_direction = direction_check(snake.moving_direction, direction)
      elif (not snake.game_started) and event.type == pygame.MOUSEBUTTONDOWN:
        x, y = pygame.mouse.get_pos()
        if 213 <= x <= 422 and 304 <= y <= 342:
          snake.game_started = True
    screen.fill((255, 255, 255))
    if snake.game_started:
      snake.moving_direction = new_direction # 在这里赋值,而不是在event事件的循环中赋值,避免按键太快
      snake.move_head()
      snake.body.append(snake.head[:])
      if snake.head == snake.food:
        if sound:
          sound_wav.play()
        snake.generate_food()
      else:
        snake.body.pop(0)
      for seg in snake.body:
        pygame.draw.rect(screen, [0, 0, 0], [seg[0], seg[1], 20, 20], 0)
      pygame.draw.rect(screen, snake.food_color, [snake.food[0], snake.food[1], 20, 20], 0)
      if snake.check_game_status():
        screen.blit(gameover_words, (241, 310))
        pygame.display.update()
        snake = Snake()
        new_direction = snake.moving_direction
        sleep(3)
      elif len(snake.body) == 512:
        screen.blit(win_words, (33, 210))
        pygame.display.update()
        snake = Snake()
        new_direction = snake.moving_direction
        sleep(3)
    else:
      screen.blit(welcome_words, (188, 100))
      screen.blit(start_game_words, (236, 310))
      screen.blit(close_game_words, (233, 350))
    pygame.display.update()
    fps_clock.tick(snake.speed)


if __name__ == '__main__':
  main()

到此这篇关于PyGame贪吃蛇的实现代码示例就介绍到这了。专注、开拓、创新的服务,放眼未来。更多相关PyGame贪吃蛇的实现代码示例内容请查看相关栏目,小编编辑不易,再次感谢大家的支持!

您可能有感兴趣的文章
用Python实现童年贪吃蛇小游戏功能的实例代码

教你一步步利用python实现贪吃蛇游戏

python简单贪吃蛇开发

python实现贪吃蛇小游戏

python贪吃蛇游戏代码