贪吃蛇游戏

import pygame,sys,random,time
from pygame.locals import *

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

def gameOver(playSurface,score):
    gOF = pygame.font.SysFont(None,54)
    gOS = gOF.render('Game Over!', True, greyColour)
    gOR = gOS.get_rect()
    gOR.midtop = (300, 10)
    pS.blit(gOS, gOR)
    sF = pygame.font.SysFont(None,54)
    sS = sF.render('Score:' str(score), True, greyColour)
    sR = sS.get_rect()
    sR.midtop = (300, 50)
    pS.blit(sS, sR)
    pygame.display.flip()
    time.sleep(5)
    pygame.quit()
    sys.exit()

def main():
    pygame.init()
    clock = pygame.time.Clock()
    pygame.display.set_caption('贪吃蛇')
    sP = [100,100]#贪吃蛇 蛇头的位置
    sS = [[100,100]]#贪吃蛇 蛇的身体，初始为一个单位
    fP = [300,300]#食物的初始位置
    fS= 1 #食物的个数为1
   
    direction = 'right' #初始方向为右
    cD= direction
           
    score = 0 #初始得分
    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'):
                    cD = 'right'
                if event.key == K_LEFT or event.key == ord('a'):
                    cD = 'left'
                if event.key == K_UP or event.key == ord('w'):
                    cD = 'up'
                if event.key == K_DOWN or event.key == ord('s'):
                    cD = 'down'
                if event.key == K_ESCAPE:
                    pygame.event.post(pygame.event.Event(QUIT))

        if cD== 'right' and not direction == 'left':
            direction = cD
        if cD == 'left' and not direction == 'right':
            direction = cD
        if cD == 'up' and not direction == 'down':
            direction = cD
        if cD == 'down' and not direction == 'up':
            direction = cD
        # 根据方向移动蛇头的坐标
        if direction == 'right':
            sP[0] = 20
        if direction == 'left':
            sP[0] -= 20
        if direction == 'up':
            sP[1] -= 20
        if direction == 'down':
            sP[1] = 20
        # 增加蛇的长度
        sS.insert(0,list(sP))
        # 判断是否吃掉了树莓
        if sP[0] == fP[0] and sP[1] == fP[1]:
            fP = 0
        else:
            sS.pop()
        # 如果吃掉树莓，则重新生成树莓
        if fP == 0:
            x = random.randrange(1,30)
            y = random.randrange(1,23)
            fP = [int(x*20),int(y*20)]
            fS = 1
            score = 1
        # 绘制pygame显示层
        pS.fill(blackColour)
        for position in sS:
            pygame.draw.rect(pS,whiteColour,Rect(position[0],position[1],20,20))
            pygame.draw.rect(pS,redColour,Rect(fP[0], fP[1],20,20))
        # 刷新pygame显示层
        pygame.display.flip()
        # 判断是否死亡
        if sP[0] > 600 or sP[0] < 0:
            gameOver(pS,score)
        if sP[1] > 460 or sP[1] < 0:
            gameOver(pS,score)
        for sB in sS[1:]:
            if sP[0] == sB[0] and sP[1] == sB[1]:
                gameOver(pS,score)
        # 控制游戏速度
        if 0 <= score <3:
            clock.tick(5)
        elif 3 <= score <5:
            clock.tick(6)
        elif 5 <= score <10:
            clock.tick(7)
        elif 10 <= score <15:
            clock.tick(8)
        elif 15 <= score <20:
            clock.tick(9)
        elif 20 <= score <25:
            clock.tick(10)
        elif 25 <= score <30:
            clock.tick(12)
        elif 30 <= score <35:
            clock.tick(15)
        elif 35 <= score <40:
            clock.tick(17)
        else:
            clock.tick(20)
if __name__ == "__main__":
    pS = pygame.display.set_mode((600,460))
    main()