PyGame贪吃蛇的实现代码示例
(编辑：jimmy 日期: 2024/11/17 浏览：2)
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()
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