欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

使用pygame模块编写贪吃蛇的实例讲解

程序员文章站 2022-11-14 16:26:59
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:...

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

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

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

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。