基于pygame的游戏案例(1)

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基于pygame的游戏案例

• 开发工具：python

• 开发平台：pycharm

• 游戏案例：贪吃蛇

• 游戏规则:

键盘wasd控制蛇的方向,寻找吃的东西,每吃一口草莓蛇的身子会越吃越长碰墙，咬到自己的身体或咬自己的尾巴则游戏结束。

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一. 贪吃蛇游戏

游戏截图

代码分析

颜色定义:

redColour = pygame.Color(255, 0, 0)
blackColour = pygame.Color(0, 0, 0)
whiteColour = pygame.Color(255, 255, 255)
greyColour = pygame.Color(150, 150, 150)

初始化变量:

snakePosition = [100,100]
snakeSements = [[100,100],[80,100],[60,100]]
raspberryPosition = [300,300]
raspberrySpawned = 1
direction = 'right'
changeDirection = direction

将蛇的身体增加一节，放在头部:

snakeSements.insert(0,list(snakePosition))

检查蛇头部的X、Y坐标是否等于草莓的X、Y坐标:

if snakePosition[0] == raspberryPosition[0] and snakePosition[1] == raspberryPosition[1]:
raspberrySpawned = 0

此处的字体可以自由设置，这里应为没有仿宋字体故选用系统字体:

gameOverFont = pygame.font.SysFont('arial',72)

部分代码

import pygame,sys,time,random
from pygame.locals import *
pygame.init()
fpsClock = pygame.time.Clock()
playSurface = pygame.display.set_mode((640,480))
pygame.display.set_caption('贪吃蛇游戏')
redColour = pygame.Color(255, 0, 0)
blackColour = pygame.Color(0, 0, 0)
whiteColour = pygame.Color(255, 255, 255)
greyColour = pygame.Color(150, 150, 150)
snakePosition = [100,100]
snakeSements = [[100,100],[80,100],[60,100]]
raspberryPosition = [300,300]
raspberrySpawned = 1
direction = 'right'
changeDirection = direction

def gameOver():
    gameOverFont = pygame.font.SysFont('arial',72)
    gameOverSurf = gameOverFont.render('Game Over',True,greyColour)
    gameOverRect = gameOverSurf.get_rect()
    gameOverRect.midtop = (320 ,10)
    playSurface.blit(gameOverSurf,gameOverRect)
    pygame.display.flip()
    time.sleep(5)
    pygame.quit()
    sys.exit()
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == KEYDOWN:
            if event.key == K_RIGHT or event.key == ord('d'):
                changeDirection = 'right'
            if event.key == K_LEFT or event.key == ord('a'):
                changeDirection = 'left'
            if event.key == K_UP or event.key == ord('w'):
                changeDirection = 'up'
            if event.key == K_DOWN or event.key == ord('s'):
                changeDirection = 'down'
            if event.key == K_ESCAPE:
                pygame.event.post(pygame.event.Event(QUIT))
    if changeDirection == 'right' and not direction == 'left':
        direction = changeDirection
    if changeDirection == 'left' and not direction == 'right':
        direction = changeDirection
    if changeDirection == 'up' and not direction == 'down':
        direction = changeDirection
    if changeDirection == 'down' and not direction == 'up':
        direction = changeDirection
    if direction == 'right':
        snakePosition[0] +=20
    if direction == 'left':
        snakePosition[0] -=20
    if direction == 'up':
        snakePosition[1] -=20
    if direction == 'down':
        snakePosition[1] +=20
    snakeSements.insert(0,list(snakePosition))
    if snakePosition[0] == raspberryPosition[0] and snakePosition[1] == raspberryPosition[1]:
        raspberrySpawned = 0
    else:
        snakeSements.pop()
    if raspberrySpawned == 0:
        x = random.randrange(1,32)
        y = random.randrange(1,24)
        raspberryPosition = [int(x*20),int(y*20)]
    raspberrySpawned = 1
    playSurface.fill(blackColour)
    for position in snakeSements:
        pygame.draw.rect(playSurface,whiteColour,Rect
        (position[0],position[1],20,20))
    pygame.draw.rect(playSurface,redColour,Rect
    (raspberryPosition[0],raspberryPosition[1],20,20))
    pygame.display.flip()
    if snakePosition[0]>620 or snakePosition[0]<0:
        gameOver()
    if snakePosition[1]>460 or snakePosition[1]<0:
        gameOver()
    for snakeBody in snakeSements[1:]:
        if snakePosition[0] == snakeBody[0] and snakePosition[1] == snakeBody[1]:
            gameOver()
    fpsClock.tick(10)

来源：oschina

链接：https://my.oschina.net/u/4460029/blog/3196734