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使用pygame模块编写贪吃蛇的实例讲解

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 30 4
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这篇CFSDN的博客文章使用pygame模块编写贪吃蛇的实例讲解由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

python ### 刚学了python不久，发现了一个好玩的库pygame 。

使用pygame模块 利用面向对象的思想编写贪吃蛇，主要用到pygame.sprite:

游戏主类 。

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import pygame,sys
from snake_sprite import Game_sprite,Snake,Food
SCREEN_RECT=pygame.Rect(0,0,828,600)
 
IMG_URL="./image/bg.jpg"
#主类
class Snakegame(object):
  def __init__(self):
   self.screen=pygame.display.set_mode(SCREEN_RECT.size)
   self.clock=pygame.time.Clock()
   self.__create_sprites()
 
  def __create_sprites(self):
   bg=Game_sprite(IMG_URL)
   self.snake=Snake()
   for pos in self.snake.snake_point:
    self.screen.blit(self.snake.image,pos)
   food=Food()
   self.bg_group=pygame.sprite.Group(bg)
   self.snake_group=pygame.sprite.Group(self.snake)
   self.food_group = pygame.sprite.Group(food)
  def start_game(self):
   while True:
    #1.时钟设置
    self.clock.tick(30)
    #2.事件监听
    self.__event_handler()
    #3.碰撞检测
    self.__check_collide()
    #4.精灵更新
    self.__update_sprites()
    #5.屏幕更新
    pygame.display.update()
  def __event_handler(self):
   for event in pygame.event.get():
    if event.type==pygame.QUIT:
     Snakegame.__game_over()
    elif event.type == pygame.KEYDOWN and event.key == pygame.K_RIGHT and \
      self.snake.direction !='L':
     self.snake.speedy = 0
     self.snake.speedx = 1
     self.snake.direction = 'R'
    elif event.type == pygame.KEYDOWN and event.key == pygame.K_LEFT and \
      self.snake.direction !='R':
     self.snake.speedy = 0
     self.snake.speedx = -1
     self.snake.direction = 'L'
    elif event.type == pygame.KEYDOWN and event.key == pygame.K_UP and \
      self.snake.direction !='D':
     self.snake.speedx = 0
     self.snake.speedy = -1
     self.snake.direction = 'U'
    elif event.type == pygame.KEYDOWN and event.key == pygame.K_DOWN and \
      self.snake.direction !='U':
     self.snake.speedx=0
     self.snake.speedy=1
     self.snake.direction='D'
  def __check_collide(self):
   pass
  def __update_sprites(self):
   self.bg_group.update()
   self.bg_group.draw(self.screen)
   self.snake_group.update()
   self.snake_group.draw(self.screen)
   self.food_group.update()
   self.food_group.draw(self.screen)
  @staticmethod
  def __game_over():
   pygame.quit()
   exit()
 
#游戏启动
if __name__ == '__main__':
  snake=Snakegame()
  snake.start_game()

工具类 。

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import pygame
import random
SNAKE_IMG="./image/snake.png"
FOOD_IMG="./image/food.jpg"
class Game_sprite(pygame.sprite.Sprite):
  def __init__(self,img_name,speedx=1,speedy=0):
   #调用父类的初始化方法
   super(Game_sprite, self).__init__()
   #属性
   self.image=pygame.image.load(img_name)
   self.rect=self.image.get_rect()
   self.speedx=speedx
   self.speedy=speedy
  def update(self):
   pass
#蛇实物
class Snake(Game_sprite):
  def __init__(self,direction='R',snakelist=[[40,40],[80,40]]):
   self.direction=direction
   self.snake_point=snakelist
   super().__init__(SNAKE_IMG)
   self.rect.x=self.snake_point[1][0]
   self.rect.y=self.snake_point[1][1]
  def update(self):
   self.rect.x += self.speedx
   self.rect.y += self.speedy
class Food(Game_sprite):
  def __init__(self):
   super(Food, self).__init__(FOOD_IMG)
   self.rect.x = random.randint(50, 828)
   self.rect.y = random.randint(38, 600)
  def update(self):
   pass

关于这次demo 。

我发现自己并没有弄懂pygame的具体画面更新机制，以及精灵的控制，对于贪吃蛇头部及身体的画面更新并没有做出来，还有对身体和头的数据结构如何构建 并不是很了解。毕竟第一次，希望有大佬看到这篇博客能够指点下.

附上函数式编程的代码 。

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import pygame
import time
import random
x = pygame.init()
white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,155,0)
display_width = 800
display_height = 600
gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption('Slither')
gameDisplay.fill(white)
pygame.display.update()
block_size = 20
applethickness = 30
FPS = 10
icon = pygame.image.load('appleimage.jpg')
pygame.display.set_icon(icon)
img = pygame.image.load('snakeimage.jpg')
appleimage = pygame.image.load('appleimage.jpg')
clock = pygame.time.Clock()
smallfont = pygame.font.SysFont(None,30)
midfont = pygame.font.SysFont(None,50)
largefont = pygame.font.SysFont("comicsansms",80)
direction = "right"
def pause():
  paused = True
  message_to_screen("暂停",black,-100,"large")
  message_to_screen("空格暂停Q退出",black, 30)
  pygame.display.update()
  while paused:
   for event in pygame.event.get():
    if event.type == pygame.QUIT:
     pygame.quit()
     quit()
    if event.type == pygame.KEYDOWN:
     if event.key == pygame.K_SPACE:
      paused = False
     elif event.key == pygame.K_q:
      pygame.quit()
      quit()
   #gameDisplay.fill(white)
  clock.tick(5)
 
def score(score):
  text1 = smallfont.render("Score : " + str(score), True, black)
  gameDisplay.blit(text1,(0,0))
def randApplegen():
  randAppleX = round(random.randrange(0,display_width-applethickness))#/10.0)*10.0
  randAppleY = round(random.randrange(0,display_height-applethickness))#/10.0)*10.0
  return randAppleX, randAppleY
 
def intro():
  intro = True
  message_to_screen("按c开始游戏",red,150)
  pygame.display.update()
  while intro:
   for event in pygame.event.get():
    if event.type == pygame.QUIT:
     pygame.quit()
     quit()
    if event.type == pygame.KEYDOWN:
     if event.key == pygame.K_c:
      intro = False
     if event.key == pygame.K_q:
      pygame.quit()
      quit()
   clock.tick(15)
def snake(snakelist):
  for xny in snakelist[:-1]:
   pygame.draw.rect(gameDisplay,green,[xny[0],xny[1],block_size,block_size])
  if(direction == "right"):
   head = pygame.transform.rotate(img,270)
  elif(direction == "left"):
   head = pygame.transform.rotate(img,90)
  elif(direction == "up"):
   head = img
  elif(direction == "down"):
   head = pygame.transform.rotate(img,180)
  gameDisplay.blit(head,(snakelist[-1][0],snakelist[-1][1]))
def text_objects(text,color,size):
  if(size == "small"):
   textsurface = smallfont.render(text,True,color)
  elif(size == "middle"):
   textsurface = midfont.render(text,True,color)
  elif(size == "large"):
   textsurface = largefont.render(text,True,color)
  return textsurface, textsurface.get_rect()
def message_to_screen(msg,color,y_displace=0,size="small"):
  textsurf, textsurf_rect = text_objects(msg,color,size)
  textsurf_rect.center = (display_width/2), (display_height/2) + y_displace
  gameDisplay.blit(textsurf,textsurf_rect)
 
def gameLoop():
  global direction
  direction = "right"
  gameExit = False
  gameOver = False
  lead_x = display_width/2
  lead_y = display_height/2
  lead_x_change = 10
  lead_y_change = 0
  randAppleX, randAppleY = randApplegen()
  snakelist = []
  snakelength = 1
  while not gameExit:
   if gameOver == True:
    message_to_screen("Game Over",red,-50,"large")
    message_to_screen("Press C to play again or Q to quit the game",black,50,"small")
    pygame.display.update()
   while gameOver == True:
    #gameDisplay.fill(white)
    for event in pygame.event.get():
     if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_q:
       gameExit = True
       gameOver = False
      if event.key == pygame.K_c:
       gameLoop()
       pygame.quit()
       quit()
     if event.type == pygame.QUIT:
      gameExit = True
      gameOver = False
      # pygame.quit()
      # quit()
   for event in pygame.event.get():
    if event.type == pygame.QUIT:
     gameExit = True
    if event.type == pygame.KEYDOWN:
     if event.key == pygame.K_LEFT and direction != "right":
      direction = "left"
      lead_x_change = -block_size
      lead_y_change = 0
     elif event.key == pygame.K_RIGHT and direction != "left":
      direction = "right"
      lead_x_change = block_size
      lead_y_change = 0
     elif event.key == pygame.K_UP and direction != "down":
      direction = "up"
      lead_y_change = -block_size
      lead_x_change = 0
     elif event.key == pygame.K_DOWN and direction != "up":
      direction = "down"
      lead_y_change = block_size
      lead_x_change = 0
     elif event.key == pygame.K_SPACE:
      pause()
   if lead_x + block_size/2 >= display_width or lead_x < 0 or lead_y + block_size/2 >= display_height or lead_y < 0:
    gameOver = True
   lead_x += lead_x_change
   lead_y += lead_y_change
   gameDisplay.fill(white)
   gameDisplay.blit(appleimage,(randAppleX,randAppleY))
   #pygame.draw.rect(gameDisplay,red,[350,350,100,10])
   # gameDisplay.fill(red, rect=[200,200,50,50])  #good method
   snakehead = []
   snakehead.append(lead_x)
   snakehead.append(lead_y)
   snakelist.append(snakehead)
   if len(snakelist) > snakelength:
    del snakelist[0]
   for each in snakelist[:-1]:
    if each == snakehead:
     gameOver = True
   snake(snakelist)
   score(snakelength-1)
   pygame.display.update()
   if lead_x >= randAppleX and lead_x <= randAppleX + applethickness or lead_x + block_size >= randAppleX and lead_x + block_size <= randAppleX + applethickness:
    if lead_y >= randAppleY and lead_y <= randAppleY + applethickness or lead_y + block_size >= randAppleY and lead_y + block_size <= randAppleY + applethickness:
     randAppleX, randAppleY = randApplegen()
     snakelength += 1;   
   clock.tick(FPS)
intro()
gameLoop()
 
pygame.quit()
quit()

以上这篇使用pygame模块编写贪吃蛇的实例讲解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持我.

原文链接：http://blog.csdn.net/qq_38356149/article/details/79255243 。

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