一直想用pygame做一个小游戏的，可是因为拖延症的缘故一直没有动，结果那天看到了一个12岁的国际友人小盆友用pygame做的一款塔防游戏，突然感觉已经落后超级远了，所以心血来潮做小游戏了。高中陪伴我的游戏就是手机里的贪吃蛇，还记得我和老尹童鞋比拼分数的场景，所以就从贪吃蛇开始吧。
好吧，因为大学老师教导我们，用面向对象的语言写程序的时候，首先考虑建立类，于是乎，我就考虑建立了snake类和food类两个，但是我不准备在我的程序里添加图片，所以这两个类最终沦为贪吃蛇和食物它们各自的位置变换的实现了。
class snake:
def __init__(self):
"""
init the snake
"""
self.poslist = [[10,10]]
def position(self):
"""
return the all of the snake's point
"""
return self.poslist
def gowhere(self,where):
"""
change the snake's point to control the snake's moving direction
"""
count = len(self.poslist)
pos = count-1
while pos > 0:
self.poslist[pos] = copy.deepcopy(self.poslist[pos-1])
pos -= 1
if where is 'U':
self.poslist[pos][1] -= 10
if self.poslist[pos][1] < 0:
self.poslist[pos][1] = 500
if where is 'D':
self.poslist[pos][1] += 10
if self.poslist[pos][1] > 500:
self.poslist[pos][1] = 0
if where is 'L':
self.poslist[pos][0] -= 10
if self.poslist[pos][0] < 0:
self.poslist[pos][0] = 500
if where is 'R':
self.poslist[pos][0] += 10
if self.poslist[pos][0] > 500:
self.poslist[pos][0] = 0
def eatfood(self,foodpoint):
"""
eat the food and add point to snake
"""
self.poslist.append(foodpoint)
在gowhere函数中，之所以与500比较大小，是因为我定义的窗口大小为宽500，高500
class food:
def __init__(self):
"""
init the food's point
"""
self.x = random.randint(10,490)
self.y = random.randint(10,490)
def display(self):
"""
init the food's point and return the point
"""
self.x = random.randint(10,490)
self.y = random.randint(10,490)
return self.position()
def position(self):
"""
return the food's point
"""
return [self.x,self.y]
food 的位置是使用随即函数随即出来的
def main():
moveup = False
movedown = False
moveleft = False
moveright = True
pygame.init()
clock = pygame.time.Clock()
width = 500
height = 500
screen = pygame.display.set_mode([width,height]) #1
restart = True
while restart:
sk = snake()
fd = food()
screentitle = pygame.display.set_caption("eat snake") #2
sk.gowhere('R')
running = True
while running:
# fill the background is white
screen.fill([255,255,255]) #3
程序开始主要是做了一些初始化的工作，moveup/movedown/moveleft/moveright这四个变量使用来标注贪吃蛇的运动方向的，#1标注的那句是初始化显示窗口的（因此所有pygame编写的程序中，这句话有且只能调用一次），#2标注的那句是初始化标题栏显示标题的，#3那句是用来填充整个背景为白色
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
exit(0)
# judge the down key
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP:
moveup = True
movedown = False
moveleft = False
moveright = False
if event.key == pygame.K_DOWN:
moveup = False
movedown = True
moveleft = False
moveright = False
if event.key == pygame.K_LEFT:
moveup = False
movedown = False
moveleft = True
moveright = False
if event.key == pygame.K_RIGHT:
moveup = False
movedown = False
moveleft = False
moveright = True
当按下方向键时，设置相应的方向
# where the snake goes
time_pass = clock.tick(40)
if moveup:
sk.gowhere('U')
if movedown:
sk.gowhere('D')
if moveleft:
sk.gowhere('L')
if moveright:
sk.gowhere('R')
设置视频帧数并设置贪吃蛇的移动方向
# draw the food
poslist = sk.position()
foodpoint = fd.position()
fdrect = pygame.draw.circle(screen,[255,0,0],foodpoint,15,0)
# draw the snafe
snaferect = []
for pos in poslist:
snaferect.append(pygame.draw.circle(screen,[255,0,0],pos,5,0))
在界面上画上食物和贪吃蛇，其中fdrect和snaferect的存储是后面碰撞检测需要用到的
# crash test if the snake eat food
if fdrect.collidepoint(pos):
foodpoint = fd.display()
sk.eatfood(foodpoint)
fdrect = pygame.draw.circle(screen,[255,0,0],foodpoint,15,0)
break
# crash test if the snake crash itsself
headrect = snaferect[0]
count = len(snaferect)
while count > 1:
if headrect.colliderect(snaferect[count-1]):
running = False
count -= 1
pygame.display.update()
碰撞检测贪吃蛇是否吃到了食物，以及是否撞到了自己，pygame.display.update()是更新整个界面的意思，前面的画图只是画到了区域里，但是没有更新到窗口，需要此句将其更新到显示窗口
# game over background
pygame.font.init()
screen.fill([100,0,0])
font = pygame.font.Font(None,48)
text = font.render("Game Over !!!",True,(255,0,0))
textRect = text.get_rect()
textRect.centerx = screen.get_rect().centerx
textRect.centery = screen.get_rect().centery + 24
screen.blit(text,textRect)
# keydown r restart,keydown n exit
while 1:
event = pygame.event.poll()
if event.type == pygame.QUIT:
pygame.quit()
exit(0)
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_r:
restart = True
del sk
del fd
break
if event.key == pygame.K_n:
restart = False
break
pygame.display.update()
当输了之后，界面上显示game over字样，此时按下“n”退出程序，按下“r"重新开始
自己写的这个贪吃蛇与那位国际友人写的程序比较一下，发现我因为懒所以没有添加图片和音乐，纯是画的图，所以不需要图片的各种操作，我觉得那个图片跟着鼠标转动的效果挺有意思的，以后再做别的游戏的时候再添加吧
源码：http://download.csdn.net/detail/vhghhd/6035283，嘿嘿