python贪吃蛇小游戏 Python贪吃蛇小游戏实例分享
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使用的库
pygame 、random 、pyautogui
流程简述
1.设置初始参数
设置每个网格大小为 20 px ，size可以随意修改但最好为20的倍数，设置初始方向向右，初始蛇长为 3 。
# 初始化参数
size = 320
screen = pygame.display.set_mode([size,size],0 , 32)
pygame.display.set_caption("贪吃蛇")
cell_size = 20
cell_num = int(size/20)
x , y = [60,0]
# 初始方向向右
dir_snake = 'R'
body_snake = [[0,0],[20,0],[40,0],[60,0]]
# 初始蛇长为3
len_snake = 3
# 初始食物坐标
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
# 蛇移动速度
clock = pygame.time.Clock()
2.键盘控制
键盘上下左右控制蛇方向，禁止反向。
3.食物
蛇头吃到食物后，蛇长加一 ，random 一个随机坐标，如果坐标再蛇身上则继续 random。
if [x,y] == food_coor[:2]:
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
if food_coor[:2] in body_snake[-2:-len_snake -1 :-1]:
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
len_snake +=1
4. 胜负判断
蛇头与蛇身碰撞判输，弹出游戏结束窗口，说明最终蛇长为多长。
if body_snake[-1] in body_snake[-2:-len_snake -1 :-1]:
pyautogui.alert(text='游戏结束,最终蛇长为{}'.format(len_snake))
exit()
代码及结果
代码
import pygame , random ,pyautogui
from pygame.locals import *
# 初始化参数
size = 500
screen = pygame.display.set_mode([size,size],0 , 32)
pygame.display.set_caption("贪吃蛇")
cell_size = 20
cell_num = int(size/20)
x , y = [60,0]
# 初始方向向右
dir_snake = 'R'
body_snake = [[0,0],[20,0],[40,0],[60,0]]
# 初始蛇长为3
len_snake = 3
# 初始食物坐标
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
# 蛇移动速度
clock = pygame.time.Clock()
# bg
def bg():
for i in range(0, size , int(cell_size)):
pygame.draw.line(screen,[72,72,72],[i,0],[i,size])
for i in range(0, size, int(cell_size)):
pygame.draw.line(screen, [72, 72, 72], [0, i], [size,i])
# 蛇
def snake(K):
for x,y in K[:-len_snake - 1:-1]:
pygame.draw.rect(screen,[255,255,255],[x,y,20,20],0)
# 食物
def food():
pygame.draw.rect(screen,[255,0,0],food_coor,0)
# 主循环
def running():
global x ,y , dir_snake ,food_coor , len_snake
while True:
for event in pygame.event.get():
if event.type == QUIT:
exit()
screen.fill((40, 43, 46))
# 方向规则
if dir_snake == 'U':
y -= 20
elif dir_snake == 'R':
x += 20
elif dir_snake == 'D':
y += 20
elif dir_snake == 'L':
x -= 20
# 键盘方向控制
if event.type == KEYDOWN:
if event.key == K_LEFT and dir_snake != 'R':
dir_snake = 'L'
elif event.key == K_DOWN and dir_snake != 'U':
dir_snake = 'D'
elif event.key == K_RIGHT and dir_snake != 'L':
dir_snake = 'R'
elif event.key == K_UP and dir_snake != 'D':
dir_snake = 'U'
# 撞墙之后
if x < 0:
x += size
elif x >= size:
x -= size
elif y < 0:
y += size
elif y >= size:
y -= size
# draw蛇体
body_snake.append([x,y])
snake(body_snake)
food()
# 吃到食物后food换位置
if [x,y] == food_coor[:2]:
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
if food_coor[:2] in body_snake[-2:-len_snake -1 :-1]:
food_coor = [random.randint(0, cell_num - 1) * 20, random.randint(0, cell_num - 1) * 20, 20, 20]
len_snake +=1
# 游戏结束
if body_snake[-1] in body_snake[-2:-len_snake -1 :-1]:
pyautogui.alert(text='游戏结束,最终蛇长为{}'.format(len_snake))
exit()
# 格线
bg()
# 右下角显示蛇长
font = pygame.font.SysFont("simsunnsimsun", 40)
text_surface = font.render("{}".format(len_snake), True, (255,255, 255))
screen.blit(text_surface , (size-40,size-40))
pygame.display.update()
# 蛇的移动速度随着蛇的长度而越来越快
clock.tick(len_snake * 2)
if __name__ == '__main__':
pygame.init()
running()
输出结果
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