设计内容：

贪吃蛇小游戏

使用工具：

Geany编辑器，Python中的pygame模块

游戏预览图：

详细代码：

1. 游戏主进程模块：

import sys

from threading import Timer

import time

import pygame

from snake import Snake

from food import Food

import function as fun

def run_game():

'''游戏主进程'''

pygame.init()

screen = pygame.display.set_mode((600,400))

pygame.display.set_caption('Snake Eat')

snake_color = (60,60,60)

bg_color = (230,230,230)

snake = Snake(snake_color,screen)

snakes = [snake]

food = Food(screen)

#游戏难度设置5~10

speed = 9

while True:

fun.check_events(snakes)

time.sleep(1-speed/11)

for value in range(0,len(snakes)):

snakes[value].update(snakes)

fun.check_snake_food_collisions(snakes,food,screen)

fun.update_screen(screen,snakes,food)

fun.check_die(snakes)

run_game()

2.蛇头类

import pygame

from pygame.sprite import Sprite

class Snake():

'''蛇头类'''

def __init__(self,color,screen):

self.screen = screen

self.color = color

self.speed = 20

self.screen_rect = screen.get_rect()

self.rect = pygame.Rect(0,0,20,20)

self.rect.centerx = self.screen_rect.centerx - 10

self.rect.centery = self.screen_rect.centery - 10

self.centerx = float(self.rect.centerx)

self.centery = float(self.rect.centery)

#控制方向的列表

self.direct = [True,False,False,False]

self.number = 0

self.last_x = 0

self.last_y = 0

def draw_snake(self):

pygame.draw.rect(self.screen,self.color,self.rect)

def update(self,snakes):

#记录蛇头的当前位置

snakes[0].last_x = self.centerx

snakes[0].last_y = self.centery

key = self.direct.index(True)

if key == 0:

self.centery -= self.speed

elif key == 1:

self.centery += self.speed

elif key == 2:

self.centerx -= self.speed

elif key == 3:

self.centerx += self.speed

#更新蛇头的位置

snakes[0].rect.centerx = self.centerx

snakes[0].rect.centery = self.centery

3. 果实类

import pygame

from random import randint

class Food():

'''果实类'''

def __init__(self,screen):

self.screen = screen

self.color = (255,0,0)

self.screen_rect = screen.get_rect()

self.rect = pygame.Rect(0,0,20,20)

self.rect.centerx = randint(0,29) * 20 + 10

self.rect.centery = randint(0,19) * 20 + 10

def draw_food(self):

pygame.draw.rect(self.screen,self.color,self.rect)

def update(self,snakes):

'''果实不会出现在蛇身体上'''

flag = True

while flag:

flag = False

self.rect.centerx = randint(0,29) * 20 + 10

self.rect.centery = randint(0,19) * 20 + 10

for value in range(0,len(snakes)):

if self.rect.centerx == snakes[value].rect.centerx and self.rect.centery == snakes[value].rect.centery:

flag = True

4. 蛇身类

import pygame

from pygame.sprite import Sprite

class Snake_Body():

'''蛇身类'''

def __init__(self,color,screen,snakes):

self.screen = screen

self.color = color

self.speed = 20

self.screen_rect = screen.get_rect()

self.rect = pygame.Rect(0,0,20,20)

#获取上一块蛇身的前一次位置

self.rect.centerx = snakes[-1].last_x

self.rect.centery = snakes[-1].last_y

self.last_x = 0

self.last_y = 0

#记录snakes列表中每块蛇身体的index

self.number = -1

def draw_snake(self):

pygame.draw.rect(self.screen,self.color,self.rect)

def update(self,snakes):

#记录蛇身体中某一块的当前位置

snakes[self.number].last_x = snakes[self.number].rect.centerx

snakes[self.number].last_y = snakes[self.number].rect.centery

#更新蛇身体中某一块的位置

snakes[self.number].rect.centerx = snakes[self.number-1].last_x

snakes[self.number].rect.centery = snakes[self.number-1].last_y

5. 游戏函数模块

import sys

import pygame

from food import Food

from snake import Snake

from snake_body import Snake_Body

'''游戏函数模块'''

def check_events(snakes):

'''检查键盘事件，控制方向'''

for event in pygame.event.get():

if event.type == pygame.KEYDOWN:

if event.type == pygame.QUIT:

sys.exit()

elif event.key == pygame.K_RIGHT:

if snakes[0].direct[2]:

break

else:

snakes[0].direct=[False,False,False,True]

elif event.key == pygame.K_LEFT:

if snakes[0].direct[3]:

break

else:

snakes[0].direct=[False,False,True,False]

elif event.key == pygame.K_UP:

if snakes[0].direct[1]:

break

else:

snakes[0].direct=[True,False,False,False]

elif event.key == pygame.K_DOWN:

if snakes[0].direct[0]:

break

else:

snakes[0].direct=[False,True,False,False]

elif event.key == pygame.K_q:

sys.exit()

def update_screen(screen,snakes,food):

screen.fill((230,230,230))

for value in range(0,len(snakes)):

snakes[value].draw_snake()

food.draw_food()

pygame.display.flip()

def check_snake_food_collisions(snakes,food,screen):

'''检测碰撞'''

collision = pygame.sprite.collide_rect(snakes[0],food)

if collision:

for value in range(0,len(snakes)):

snakes[value].number -= 1

food.update(snakes)

eat_food(snakes,screen,food)

def eat_food(snakes,screen,food):

'''吃到果实'''

snake_body = Snake_Body((0,0,255),screen,snakes)

snakes.append(snake_body)

def check_die(snakes):

'''检测死亡'''

if snakes[0].rect.centerx < 0 or snakes[0].rect.centery < 0 or snakes[0].rect.centerx > 600 or snakes[0].rect.centery > 400:

sys.exit()

for value in range(1,len(snakes)):

collision = pygame.sprite.collide_rect(snakes[0],snakes[value])

if collision:

sys.exit()

6.总结

游戏做的比较简单，有不足之处可以留言。