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   源码介绍

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#!/usr/bin/env python
import pygame,sys,time,random
from pygame.locals import *
# 定义颜色变量
redColour = pygame.Color(255,46,10)
blackColour = pygame.Color(0,0,16)
whiteColour = pygame.Color(255,55,255)
greyColour = pygame.Color(150,10,150)
 
# 定义gameOver函数
def gameOver(playSurface):
    gameOverFont = pygame.font.Font('arial.ttf',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()
 
# 定义main函数
def main():
    # 初始化pygame
    pygame.init()
    fpsClock = pygame.time.Clock()
    # 创建pygame显示层
    playSurface = pygame.display.set_mode((640,480))
    pygame.display.set_caption('Raspberry Snake')
 
    # 初始化变量
    snakePosition = [100,100]
    snakeSegments = [[100,100],[80,100],[60,100]]
    raspberryPosition = [300,300]
    raspberrySpawned = 1
    direction = 'right'
    changeDirection = direction
    while True:
        # 检测例如按键等pygame事件
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()
            elif event.type == KEYDOWN:
                # 判断键盘事件
                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))
        # 判断是否输入了反方向
        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
        # 根据方向移动蛇头的坐标
        if direction == 'right':
            snakePosition[0]  = 20
        if direction == 'left':
            snakePosition[0] -= 20
        if direction == 'up':
            snakePosition[1] -= 20
        if direction == 'down':
            snakePosition[1]  = 20
        # 增加蛇的长度
        snakeSegments.insert(0,list(snakePosition))
        # 判断是否吃掉了树莓
        if snakePosition[0] == raspberryPosition[0] and snakePosition[1] == raspberryPosition[1]:
            raspberrySpawned = 0
        else:
            snakeSegments.pop()
        # 如果吃掉树莓，则重新生成树莓
        if raspberrySpawned == 0:
            x = random.randrange(1,32)
            y = random.randrange(1,24)
            raspberryPosition = [int(x*20),int(y*20)]
            raspberrySpawned = 1
        # 绘制pygame显示层
        playSurface.fill(blackColour)
        for position in snakeSegments:
            pygame.draw.rect(playSurface,whiteColour,Rect(position[0],position[1],20,20))
            pygame.draw.rect(playSurface,redColour,Rect(raspberryPosition[0], raspberryPosition[1],20,20))
 
        # 刷新pygame显示层
        pygame.display.flip()
        # 判断是否死亡
        if snakePosition[0] > 620 or snakePosition[0] < 0:
            gameOver(playSurface)
        if snakePosition[1] > 460 or snakePosition[1] < 0:
            for snakeBody in snakeSegments[1:]:
                if snakePosition[0] == snakeBody[0] and snakePosition[1] == snakeBody[1]:
                    gameOver(playSurface)
        # 控制游戏速度
        fpsClock.tick(5)
 
if __name__ == "__main__":
    main()