贪吃蛇代码（捕捉方向键需要使用wx.EVT_KEY_UP事件）

今天用wxPython做了个贪吃蛇，当是对wxPythonGDI的巩固。

关于如何在屏幕上绘画，请参见wxPython In Action的第六章1.1在屏幕上绘画

贪吃蛇源码下载不要积分

贪吃蛇源码及py2exe打包结果下载骗一个积分

突然发现一个bug，buffer的实际面积比窗口显示的要大，也就是说，当snakeHead的X是600的时候，snake已经超出右边界了，此时游戏还未失败-  -晚上用sizer修改一下。

资源中的代码与最终代码不同，请参考贪吃蛇全部代码

来画一条蛇吧

贪吃蛇首先得要有一条蛇才行，蛇细细长长的，就是一条线，那么怎么画一条线呢？以下代码就是如何画一条线，这与贪吃蛇无关，仅仅只是先初步了解怎么画。请注意OnPaint中的

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1. dc = wx.BufferedPaintDC(self, self.buffer)  

dc = wx.BufferedPaintDC(self, self.buffer)

可以注释掉试试

[python] view plaincopyprint?

1. # -*- coding:utf-8 -*-   
2. ''''' 
3. Created on 2013-1-16 
4.  
5. @author: jincheng 
6. '''  
7. import wx  
8.   
9. class SnakeWindow(wx.Window):  
10.     ''''' 
11.     贪吃蛇 
12.     '''  
13.     def __init__(self,parent):  
14.         wx.Window.__init__(self,parent,-1)  
15.         self.snakeColor='black'  
16.         self.SetBackgroundColour('green')  
17.         self.snakeThickness = 10  
18.         self.snake = [(100,100),(100,200)]  
19.         self.pen = wx.Pen(self.snakeColor, self.snakeThickness, wx.SOLID)  
20.         self.buffer = wx.EmptyBitmap(800,600)  
21.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
22.         dc.SetPen(self.pen)  
23.         dc.DrawLine(100,200,300,400)  
24.         self.Bind(wx.EVT_PAINT, self.OnPaint)  
25.         #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)  
26.           
27.     def OnPaint(self, event):  
28.         dc = wx.BufferedPaintDC(self, self.buffer)#处理一个paint（描绘）请求  
29.         print 'onpaint'  
30.   
31.     def OnLeftUp(self, event):  
32.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
33.         dc.SetPen(self.pen)  
34.         pos = event.GetPositionTuple()  
35.         dc.DrawPoint(*pos)  
36.         print 'drawpoint'  
37.       
38. class SnakeFrame(wx.Frame):  
39.     def __init__(self,parent):  
40.         wx.Frame.__init__(self,parent,-1,'title',size=(800,600))          
41.         self.sketch = SnakeWindow(self)  
42.    
43.    
44. if __name__ == '__main__':  
45.     app = wx.PySimpleApp()  
46.     frame = SnakeFrame(None)  
47.     frame.Show(True)  
48.     app.MainLoop()             

# -*- coding:utf-8 -*-'''Created on 2013-1-16@author: jincheng'''import wxclass SnakeWindow(wx.Window):    '''    贪吃蛇    '''    def __init__(self,parent):        wx.Window.__init__(self,parent,-1)        self.snakeColor='black'        self.SetBackgroundColour('green')        self.snakeThickness = 10        self.snake = [(100,100),(100,200)]        self.pen = wx.Pen(self.snakeColor, self.snakeThickness, wx.SOLID)        self.buffer = wx.EmptyBitmap(800,600)        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        dc.DrawLine(100,200,300,400)        self.Bind(wx.EVT_PAINT, self.OnPaint)        #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)            def OnPaint(self, event):        dc = wx.BufferedPaintDC(self, self.buffer)#处理一个paint（描绘）请求        print 'onpaint'    def OnLeftUp(self, event):        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        pos = event.GetPositionTuple()        dc.DrawPoint(*pos)        print 'drawpoint'    class SnakeFrame(wx.Frame):    def __init__(self,parent):        wx.Frame.__init__(self,parent,-1,'title',size=(800,600))                self.sketch = SnakeWindow(self)  if __name__ == '__main__':    app = wx.PySimpleApp()    frame = SnakeFrame(None)    frame.Show(True)    app.MainLoop()           

让蛇动起来

现在我知道了怎么画一条线，但是线不会动啊，不会动的蛇是死蛇而不是贪吃蛇，下面要让蛇动起来。

蛇应该怎么动？鼠标点一下动一下呢还是键盘按一下动一下？方向键不动的时候蛇也应该会动才对，不然的话该叫懒蛇。

这里需要用到wx.Timer，添加一个timer事件。

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1.         self.runtime = wx.Timer(self)  
2.         self.runtime.Start(100)#100毫秒动一下  
3.         self.Bind(wx.EVT_TIMER, self.OnTimer)  
4.   
5.     #每一百毫秒做一件事  
6.     def OnTimer(self,event):  
7.         self.SnakeMove()  

        self.runtime = wx.Timer(self)        self.runtime.Start(100)#100毫秒动一下        self.Bind(wx.EVT_TIMER, self.OnTimer)    #每一百毫秒做一件事    def OnTimer(self,event):        self.SnakeMove()

SnakeMove顾名思义是贪吃蛇开始移动了。

此时我们需要考虑两件事：1、蛇往哪个方向移动；2、蛇每次移动多少距离。当然这条蛇只会或垂直方向或水平方向移动

蛇默认是向下移动的，设一个属性self.snakeDire = 317。为什么设317呢？

我们知道，按方向键是可以控制蛇的前进方向的，所以我们要加一个键盘事件。可以打出keycode看看，注意贪吃蛇不能向尾巴方向倒车，不知道两头蛇行不行。

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1.         self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)  
2.       
3.     def OnKeyUp(self,event):  
4.         code = event.GetKeyCode()  
5.         if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:  
6.             self.snakeDire = code  

        self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)        def OnKeyUp(self,event):        code = event.GetKeyCode()        if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:            self.snakeDire = code

获得了蛇行动的方向，就可以开始Move了

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1. def SnakeMove(self):  
2.     length = len(self.snake)  
3.     self.snake.pop(length-1)#shift  
4.     space = self.snakeSpace  
5.     x = 0  
6.     y = 0  
7.     if self.snakeDire == 317:  
8.         y = space  
9.     elif self.snakeDire == 316:  
10.         x = space  
11.     elif self.snakeDire == 315:  
12.         y = -space  
13.     elif self.snakeDire == 314:  
14.         x = -space  
15.     newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)  
16.     self.snake.insert(0,newhead)  
17.     self.snakeHead = newhead  
18.     dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
19.     dc.SetPen(self.pen)  
20.     print self.snake  
21.     

    def SnakeMove(self):        length = len(self.snake)        self.snake.pop(length-1)#shift        space = self.snakeSpace        x = 0        y = 0        if self.snakeDire == 317:            y = space        elif self.snakeDire == 316:            x = space        elif self.snakeDire == 315:            y = -space        elif self.snakeDire == 314:            x = -space        newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)        self.snake.insert(0,newhead)        self.snakeHead = newhead        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        print self.snake      

接着将画蛇的代码整理到一个方法里

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1. def SnakeInstantiate(self,dc):      
2.         ''''' 
3.         画出蛇 
4.         '''  
5.         last = self.snake[0]  
6.         length = len(self.snake)  
7.         for s in self.snake[1:length]:  
8.             line = last + s  
9.             dc.DrawLine(*line)  
10.             last = s  
11.       

def SnakeInstantiate(self,dc):            '''        画出蛇        '''        last = self.snake[0]        length = len(self.snake)        for s in self.snake[1:length]:            line = last + s            dc.DrawLine(*line)            last = s    

此阶段全部代码

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1. # -*- coding:utf-8 -*-   
2. ''''' 
3. Created on 2013-1-16 
4.  
5. @author: jincheng 
6. '''  
7. import wx  
8.   
9. class SnakeWindow(wx.Window):  
10.     ''''' 
11.     贪吃蛇 
12.     '''  
13.     def __init__(self,parent):  
14.         wx.Window.__init__(self,parent,-1)  
15.         self.snakeColor='black'  
16.         self.SetBackgroundColour('green')  
17.         self.snakeThickness = 10  
18.         self.snake = [(100,100),(100,200),(100,300)]  
19.         self.snakeHead = (100,300)  
20.         self.snakeSpace = 10  
21.         self.pen = wx.Pen("red", 10, wx.SOLID)   
22.         self.winsize = self.GetClientSize()  
23.         self.buffer = wx.EmptyBitmap(800,600)  
24.           
25.         self.snakeDire = 317#蛇头向下  
26.                   
27.         self.runtime = wx.Timer(self)  
28.         self.runtime.Start(100)#100毫秒动一下  
29.   
30.         self.Bind(wx.EVT_PAINT, self.OnPaint)  
31.         self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)  
32.         self.Bind(wx.EVT_TIMER, self.OnTimer)  
33.         #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)  
34.       
35.     def SnakeMove(self):  
36.         length = len(self.snake)  
37.         self.snake.pop(length-1)#shift  
38.         space = self.snakeSpace  
39.         x = 0  
40.         y = 0  
41.         if self.snakeDire == 317:  
42.             y = space  
43.         elif self.snakeDire == 316:  
44.             x = space  
45.         elif self.snakeDire == 315:  
46.             y = -space  
47.         elif self.snakeDire == 314:  
48.             x = -space  
49.         newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)  
50.         self.snake.insert(0,newhead)  
51.         self.snakeHead = newhead  
52.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
53.         dc.SetPen(self.pen)  
54.         #dc.Clear()   
55.         print self.snake  
56.         self.SnakeInstantiate(dc)  
57.   
58.           
59.     def SnakeInstantiate(self,dc):      
60.         ''''' 
61.         画出蛇 
62.         '''  
63.         last = self.snake[0]  
64.         length = len(self.snake)  
65.         for s in self.snake[1:length]:  
66.             line = last + s  
67.             dc.DrawLine(*line)  
68.             last = s  
69.       
70.     def OnTimer(self,event):  
71.         self.SnakeMove()  
72.               
73.     def OnKeyUp(self,event):  
74.         code = event.GetKeyCode()  
75.         if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:  
76.             self.snakeDire = code  
77.               
78.           
79.     def OnPaint(self, event):  
80.         dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求  
81.         print 'onpaint'  
82.   
83.     def OnLeftUp(self, event):  
84.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
85.         dc.SetPen(self.pen)  
86.         pos = event.GetPositionTuple()  
87.         dc.DrawPoint(*pos)  
88.         print 'drawpoint'  
89.       
90. class SnakeFrame(wx.Frame):  
91.     def __init__(self,parent):  
92.         wx.Frame.__init__(self,parent,-1,'title',size=(800,600))          
93.         self.sketch = SnakeWindow(self)  
94.    
95.    
96. if __name__ == '__main__':  
97.     app = wx.PySimpleApp()  
98.     frame = SnakeFrame(None)  
99.     frame.Show(True)  
100.     app.MainLoop()             

# -*- coding:utf-8 -*-'''Created on 2013-1-16@author: jincheng'''import wxclass SnakeWindow(wx.Window):    '''    贪吃蛇    '''    def __init__(self,parent):        wx.Window.__init__(self,parent,-1)        self.snakeColor='black'        self.SetBackgroundColour('green')        self.snakeThickness = 10        self.snake = [(100,100),(100,200),(100,300)]        self.snakeHead = (100,300)        self.snakeSpace = 10        self.pen = wx.Pen("red", 10, wx.SOLID)         self.winsize = self.GetClientSize()        self.buffer = wx.EmptyBitmap(800,600)                self.snakeDire = 317#蛇头向下                        self.runtime = wx.Timer(self)        self.runtime.Start(100)#100毫秒动一下        self.Bind(wx.EVT_PAINT, self.OnPaint)        self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)        self.Bind(wx.EVT_TIMER, self.OnTimer)        #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)        def SnakeMove(self):        length = len(self.snake)        self.snake.pop(length-1)#shift        space = self.snakeSpace        x = 0        y = 0        if self.snakeDire == 317:            y = space        elif self.snakeDire == 316:            x = space        elif self.snakeDire == 315:            y = -space        elif self.snakeDire == 314:            x = -space        newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)        self.snake.insert(0,newhead)        self.snakeHead = newhead        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        #dc.Clear()        print self.snake        self.SnakeInstantiate(dc)            def SnakeInstantiate(self,dc):            '''        画出蛇        '''        last = self.snake[0]        length = len(self.snake)        for s in self.snake[1:length]:            line = last + s            dc.DrawLine(*line)            last = s        def OnTimer(self,event):        self.SnakeMove()                def OnKeyUp(self,event):        code = event.GetKeyCode()        if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:            self.snakeDire = code                        def OnPaint(self, event):        dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求        print 'onpaint'    def OnLeftUp(self, event):        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        pos = event.GetPositionTuple()        dc.DrawPoint(*pos)        print 'drawpoint'    class SnakeFrame(wx.Frame):    def __init__(self,parent):        wx.Frame.__init__(self,parent,-1,'title',size=(800,600))                self.sketch = SnakeWindow(self)  if __name__ == '__main__':    app = wx.PySimpleApp()    frame = SnakeFrame(None)    frame.Show(True)    app.MainLoop()           

运行一下试试？

为什么蛇明明什么都没吃，却越来越长？打印结果也依然娇小啊

请注意，在画新的图案前，一定要clear一下旧的图案 ，凡游过，不留下痕迹。放开dc.Clear()那行代码！！！

食物在哪里

光有蛇没有食物是玩不了贪吃蛇的，食物怎么画？1、食物得出现在某个坐标上(x,y)；2、食物得有一定的体积a*b，哪怕是1*1。

我们可以认为食物是一个(x,y,x+a,y+b)的线段，当然，也可以认为是一个长a宽b左上角坐标是(x,y)的矩形。在这里，我使用dc.DrawRectangle

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1.         self.foodLoc = ()  
2.         self.foodWidth = 5  
3.         #生产食物   
4.         self.FoodManufacture()  
5.   
6.     def FoodManufacture(self):  
7.         x = random.randint(0,800)  
8.         y = random.randint(0,600)  
9.         self.foodLoc = (x,y)  
10.       
11.     def foodInstantiate(self,dc):   
12.         ''''' 
13.         画出食物 
14.         '''  
15.         food = self.foodLoc + (self.foodWidth,self.foodWidth)  
16.         dc.DrawRectangle(*food)  

        self.foodLoc = ()        self.foodWidth = 5        #生产食物        self.FoodManufacture()    def FoodManufacture(self):        x = random.randint(0,800)        y = random.randint(0,600)        self.foodLoc = (x,y)        def foodInstantiate(self,dc):         '''        画出食物        '''        food = self.foodLoc + (self.foodWidth,self.foodWidth)        dc.DrawRectangle(*food)

此阶段全部代码

[python] view plaincopyprint?

1. # -*- coding:utf-8 -*-   
2. ''''' 
3. Created on 2013-1-16 
4.  
5. @author: jincheng 
6. '''  
7. import wx  
8. import random  
9.   
10. class SnakeWindow(wx.Window):  
11.     ''''' 
12.     贪吃蛇 
13.     '''  
14.     def __init__(self,parent):  
15.         wx.Window.__init__(self,parent,-1)  
16.         self.snakeColor='black'  
17.         self.SetBackgroundColour('green')  
18.         self.snakeThickness = 10  
19.         self.snake = [(100,100),(100,200),(100,300)]  
20.         self.snakeHead = (100,300)  
21.         self.snakeSpace = 10  
22.           
23.         self.foodLoc = ()  
24.         self.foodWidth = 5  
25.           
26.         self.FoodManufacture()  
27.           
28.         self.pen = wx.Pen("red", 10, wx.SOLID)   
29.         self.winsize = self.GetClientSize()  
30.         self.buffer = wx.EmptyBitmap(800,600)  
31.         self.snakeDire = 317#蛇头向下  
32.         #self.foodInstantiate()   
33.         self.runtime = wx.Timer(self)  
34.         self.runtime.Start(100)#100毫秒动一下  
35.   
36.         self.Bind(wx.EVT_PAINT, self.OnPaint)  
37.         self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)  
38.         self.Bind(wx.EVT_TIMER, self.OnTimer)  
39.         #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)  
40.       
41.     def FoodManufacture(self):  
42.         x = random.randint(0,800)  
43.         y = random.randint(0,600)  
44.         self.foodLoc = (x,y)  
45.       
46.     def foodInstantiate(self,dc):   
47.         food = self.foodLoc + (self.foodWidth,self.foodWidth)  
48.         dc.DrawRectangle(*food)  
49.           
50.       
51.     def SnakeMove(self):  
52.         length = len(self.snake)  
53.         self.snake.pop(length-1)#shift  
54.         space = self.snakeSpace  
55.         x = 0  
56.         y = 0  
57.         if self.snakeDire == 317:  
58.             y = space  
59.         elif self.snakeDire == 316:  
60.             x = space  
61.         elif self.snakeDire == 315:  
62.             y = -space  
63.         elif self.snakeDire == 314:  
64.             x = -space  
65.         newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)  
66.         self.snake.insert(0,newhead)  
67.         self.snakeHead = newhead  
68.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
69.         dc.SetPen(self.pen)  
70.         dc.Clear()  
71.         print self.snake  
72.         self.SnakeInstantiate(dc)  
73.           
74.     def SnakeInstantiate(self,dc):      
75.         ''''' 
76.         画出蛇与食物 
77.         '''  
78.         self.foodInstantiate(dc)  
79.         last = self.snake[0]  
80.         length = len(self.snake)  
81.         for s in self.snake[1:length]:  
82.             line = last + s  
83.             dc.DrawLine(*line)  
84.             last = s  
85.       
86.     def OnTimer(self,event):  
87.         self.SnakeMove()  
88.               
89.     def OnKeyUp(self,event):  
90.         code = event.GetKeyCode()  
91.         if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:  
92.             self.snakeDire = code  
93.               
94.           
95.     def OnPaint(self, event):  
96.         dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求  
97.         print 'onpaint'  
98.   
99.     def OnLeftUp(self, event):  
100.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
101.         dc.SetPen(self.pen)  
102.         pos = event.GetPositionTuple()  
103.         pos = pos + (10,10)  
104.         dc.Clear()  
105.         dc.DrawRectangle(*pos)  
106.         print 'drawpoint'  
107.       
108. class SnakeFrame(wx.Frame):  
109.     def __init__(self,parent):  
110.         wx.Frame.__init__(self,parent,-1,'title',size=(800,600))          
111.         self.sketch = SnakeWindow(self)  
112.    
113.    
114. if __name__ == '__main__':  
115.     app = wx.PySimpleApp()  
116.     frame = SnakeFrame(None)  
117.     frame.Show(True)  
118.     app.MainLoop()             

# -*- coding:utf-8 -*-'''Created on 2013-1-16@author: jincheng'''import wximport randomclass SnakeWindow(wx.Window):    '''    贪吃蛇    '''    def __init__(self,parent):        wx.Window.__init__(self,parent,-1)        self.snakeColor='black'        self.SetBackgroundColour('green')        self.snakeThickness = 10        self.snake = [(100,100),(100,200),(100,300)]        self.snakeHead = (100,300)        self.snakeSpace = 10                self.foodLoc = ()        self.foodWidth = 5                self.FoodManufacture()                self.pen = wx.Pen("red", 10, wx.SOLID)         self.winsize = self.GetClientSize()        self.buffer = wx.EmptyBitmap(800,600)        self.snakeDire = 317#蛇头向下        #self.foodInstantiate()        self.runtime = wx.Timer(self)        self.runtime.Start(100)#100毫秒动一下        self.Bind(wx.EVT_PAINT, self.OnPaint)        self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)        self.Bind(wx.EVT_TIMER, self.OnTimer)        #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)        def FoodManufacture(self):        x = random.randint(0,800)        y = random.randint(0,600)        self.foodLoc = (x,y)        def foodInstantiate(self,dc):         food = self.foodLoc + (self.foodWidth,self.foodWidth)        dc.DrawRectangle(*food)                def SnakeMove(self):        length = len(self.snake)        self.snake.pop(length-1)#shift        space = self.snakeSpace        x = 0        y = 0        if self.snakeDire == 317:            y = space        elif self.snakeDire == 316:            x = space        elif self.snakeDire == 315:            y = -space        elif self.snakeDire == 314:            x = -space        newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)        self.snake.insert(0,newhead)        self.snakeHead = newhead        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        dc.Clear()        print self.snake        self.SnakeInstantiate(dc)            def SnakeInstantiate(self,dc):            '''        画出蛇与食物        '''        self.foodInstantiate(dc)        last = self.snake[0]        length = len(self.snake)        for s in self.snake[1:length]:            line = last + s            dc.DrawLine(*line)            last = s        def OnTimer(self,event):        self.SnakeMove()                def OnKeyUp(self,event):        code = event.GetKeyCode()        if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:            self.snakeDire = code                        def OnPaint(self, event):        dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求        print 'onpaint'    def OnLeftUp(self, event):        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        pos = event.GetPositionTuple()        pos = pos + (10,10)        dc.Clear()        dc.DrawRectangle(*pos)        print 'drawpoint'    class SnakeFrame(wx.Frame):    def __init__(self,parent):        wx.Frame.__init__(self,parent,-1,'title',size=(800,600))                self.sketch = SnakeWindow(self)  if __name__ == '__main__':    app = wx.PySimpleApp()    frame = SnakeFrame(None)    frame.Show(True)    app.MainLoop()           

吃到食物

吃到食物很好理解，蛇的头snakeHead碰到食物的位置foodLoc，就算吃到了，蛇也长大一节，随后重新投放食物

此阶段全部代码

[python] view plaincopyprint?

1. # -*- coding:utf-8 -*-   
2. ''''' 
3. Created on 2013-1-16 
4.  
5. @author: jincheng 
6. '''  
7. import wx  
8. import random  
9.   
10. class SnakeWindow(wx.Window):  
11.     ''''' 
12.     贪吃蛇 
13.     '''  
14.     def __init__(self,parent):  
15.         wx.Window.__init__(self,parent,-1)  
16.         self.snakeColor='black'  
17.         self.SetBackgroundColour('green')  
18.         self.snakeThickness = 10  
19.         self.snake = [(100,100),(100,200),(100,300)]  
20.         self.snakeHead = (100,300)  
21.         self.snakeSpace = 10  
22.           
23.         self.foodLoc = ()  
24.         self.foodWidth = 1  
25.           
26.         self.FoodManufacture()  
27.           
28.         self.pen = wx.Pen(self.snakeColor, self.snakeThickness, wx.SOLID)   
29.         self.winsize = self.GetClientSize()  
30.         self.buffer = wx.EmptyBitmap(800,600)  
31.         self.snakeDire = 317#蛇头向下  
32.         #self.foodInstantiate()   
33.         self.runtime = wx.Timer(self)  
34.         self.runtime.Start(100)#100毫秒动一下  
35.   
36.         self.Bind(wx.EVT_PAINT, self.OnPaint)  
37.         self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)  
38.         self.Bind(wx.EVT_TIMER, self.OnTimer)  
39.         #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)  
40.       
41.     def FoodManufacture(self):  
42.         x = random.randint(0,80)  
43.         y = random.randint(0,60)  
44.         self.foodLoc = (x*10,y*10)  
45.       
46.     def foodInstantiate(self,dc):   
47.         food = self.foodLoc + (self.foodWidth,self.foodWidth)  
48.         dc.DrawRectangle(*food)  
49.           
50.       
51.     def SnakeMove(self):  
52.         length = len(self.snake)  
53.         self.snake.pop(length-1)#shift  
54.         space = self.snakeSpace  
55.         x = 0  
56.         y = 0  
57.         if self.snakeDire == 317:  
58.             y = space  
59.         elif self.snakeDire == 316:  
60.             x = space  
61.         elif self.snakeDire == 315:  
62.             y = -space  
63.         elif self.snakeDire == 314:  
64.             x = -space  
65.         newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)  
66.         self.snake.insert(0,newhead)  
67.         self.snakeHead = newhead  
68.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
69.         dc.SetPen(self.pen)  
70.         dc.Clear()  
71.         self.SnakeInstantiate(dc)  
72.           
73.     def SnakeInstantiate(self,dc):      
74.         ''''' 
75.         画出蛇与食物 
76.         '''  
77.         self.foodInstantiate(dc)  
78.         last = self.snake[0]  
79.         length = len(self.snake)  
80.         for s in self.snake[1:length]:  
81.             line = last + s  
82.             dc.DrawLine(*line)  
83.             last = s  
84.           
85.         if self.Eat():  
86.             pass  
87.           
88.     def Eat(self):  
89.         print self.snakeHead,self.foodLoc  
90.         if self.snakeHead == self.foodLoc:  
91.             self.snake.insert(0, self.foodLoc)  
92.             self.FoodManufacture()  
93.             #print self.snake   
94.             return True  
95.         else :  
96.             return False  
97.       
98.     def OnTimer(self,event):  
99.         self.SnakeMove()  
100.               
101.     def OnKeyUp(self,event):  
102.         code = event.GetKeyCode()  
103.         if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:  
104.             self.snakeDire = code  
105.         #self.SnakeMove()       
106.           
107.     def OnPaint(self, event):  
108.         dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求  
109.         print 'onpaint'  
110.   
111.     def OnLeftUp(self, event):  
112.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
113.         dc.SetPen(self.pen)  
114.         pos = event.GetPositionTuple()  
115.         pos = pos + (10,10)  
116.         dc.Clear()  
117.         dc.DrawRectangle(*pos)  
118.         print 'drawpoint'  
119.       
120. class SnakeFrame(wx.Frame):  
121.     def __init__(self,parent):  
122.         wx.Frame.__init__(self,parent,-1,'title',size=(800,600))          
123.         self.sketch = SnakeWindow(self)  
124.    
125.    
126. if __name__ == '__main__':  
127.     app = wx.PySimpleApp()  
128.     frame = SnakeFrame(None)  
129.     frame.Show(True)  
130.     app.MainLoop()             

# -*- coding:utf-8 -*-'''Created on 2013-1-16@author: jincheng'''import wximport randomclass SnakeWindow(wx.Window):    '''    贪吃蛇    '''    def __init__(self,parent):        wx.Window.__init__(self,parent,-1)        self.snakeColor='black'        self.SetBackgroundColour('green')        self.snakeThickness = 10        self.snake = [(100,100),(100,200),(100,300)]        self.snakeHead = (100,300)        self.snakeSpace = 10                self.foodLoc = ()        self.foodWidth = 1                self.FoodManufacture()                self.pen = wx.Pen(self.snakeColor, self.snakeThickness, wx.SOLID)         self.winsize = self.GetClientSize()        self.buffer = wx.EmptyBitmap(800,600)        self.snakeDire = 317#蛇头向下        #self.foodInstantiate()        self.runtime = wx.Timer(self)        self.runtime.Start(100)#100毫秒动一下        self.Bind(wx.EVT_PAINT, self.OnPaint)        self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)        self.Bind(wx.EVT_TIMER, self.OnTimer)        #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)        def FoodManufacture(self):        x = random.randint(0,80)        y = random.randint(0,60)        self.foodLoc = (x*10,y*10)        def foodInstantiate(self,dc):         food = self.foodLoc + (self.foodWidth,self.foodWidth)        dc.DrawRectangle(*food)                def SnakeMove(self):        length = len(self.snake)        self.snake.pop(length-1)#shift        space = self.snakeSpace        x = 0        y = 0        if self.snakeDire == 317:            y = space        elif self.snakeDire == 316:            x = space        elif self.snakeDire == 315:            y = -space        elif self.snakeDire == 314:            x = -space        newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)        self.snake.insert(0,newhead)        self.snakeHead = newhead        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        dc.Clear()        self.SnakeInstantiate(dc)            def SnakeInstantiate(self,dc):            '''        画出蛇与食物        '''        self.foodInstantiate(dc)        last = self.snake[0]        length = len(self.snake)        for s in self.snake[1:length]:            line = last + s            dc.DrawLine(*line)            last = s                if self.Eat():            pass            def Eat(self):        print self.snakeHead,self.foodLoc        if self.snakeHead == self.foodLoc:            self.snake.insert(0, self.foodLoc)            self.FoodManufacture()            #print self.snake            return True        else :            return False        def OnTimer(self,event):        self.SnakeMove()                def OnKeyUp(self,event):        code = event.GetKeyCode()        if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:            self.snakeDire = code        #self.SnakeMove()                def OnPaint(self, event):        dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求        print 'onpaint'    def OnLeftUp(self, event):        dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)        dc.SetPen(self.pen)        pos = event.GetPositionTuple()        pos = pos + (10,10)        dc.Clear()        dc.DrawRectangle(*pos)        print 'drawpoint'    class SnakeFrame(wx.Frame):    def __init__(self,parent):        wx.Frame.__init__(self,parent,-1,'title',size=(800,600))                self.sketch = SnakeWindow(self)  if __name__ == '__main__':    app = wx.PySimpleApp()    frame = SnakeFrame(None)    frame.Show(True)    app.MainLoop()           

到此贪吃蛇的基本功能就实现了，还剩下判断游戏失败。

恭喜，GAME OVER

怎么判断游戏失败：1、蛇头超出窗口；2、蛇咬到自己（snakeHead in snake）

[python] view plaincopyprint?

1. def GameOver(self,newhead):  
2.     if newhead in self.snake:  
3.         self.runtime.Stop()  
4.         print 'autotomy'  
5.         return True  
6.     elif self.snakeHead[0] < 0 or self.snakeHead[0] > 800 or self.snakeHead[1] <1 or self.snakeHead[1] >600:  
7.         self.runtime.Stop()  
8.         print 'out'  
9.         return True  
10.     else :  
11.         return False  

    def GameOver(self,newhead):        if newhead in self.snake:            self.runtime.Stop()            print 'autotomy'            return True        elif self.snakeHead[0] < 0 or self.snakeHead[0] > 800 or self.snakeHead[1] <1 or self.snakeHead[1] >600:            self.runtime.Stop()            print 'out'            return True        else :            return False

贪吃蛇全部代码

最新代码，已修正边界坐标  2013.1.18

[python] view plaincopyprint?

1. # -*- coding:utf-8 -*-   
2. ''''' 
3. Created on 2013-1-16 
4.  
5. @author: jincheng 
6. '''  
7. import wx  
8. import random  
9.   
10. class SnakeWindow(wx.Window):  
11.     ''''' 
12.     贪吃蛇 
13.     '''  
14.     def __init__(self,parent,size,offset):  
15.         wx.Window.__init__(self,parent,-1,size=size)  
16.         print self.GetBorder(wx.BOTTOM)  
17.         self.area = (size[0]-offset,size[1]-offset)  
18.         self.snakeColor='black'  
19.         self.SetBackgroundColour('green')  
20.         self.snakeThickness = 10  
21.         self.snake = [(100,100),(100,110),(100,120)]  
22.         self.snakeHead = (100,120)  
23.         self.snakeSpace = 10  
24.         self.snakeDebris = []  
25.           
26.         self.foodLoc = ()  
27.         self.foodWidth = 1  
28.           
29.         self.FoodManufacture()  
30.           
31.         self.pen = wx.Pen(self.snakeColor, self.snakeThickness, wx.SOLID)   
32.         self.winsize = self.GetClientSize()  
33.         self.buffer = wx.EmptyBitmap(*self.area)  
34.         self.snakeDire = 317#蛇头向下  
35.         #self.foodInstantiate()  
36.         self.runtime = wx.Timer(self)  
37.         self.runtime.Start(100)#100毫秒动一下  
38.   
39.         self.Bind(wx.EVT_PAINT, self.OnPaint)  
40.         self.Bind(wx.EVT_KEY_UP,self.OnKeyUp)  
41.         self.Bind(wx.EVT_TIMER, self.OnTimer)  
42.         #self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)  
43.       
44.     def __RandPoint(self):  
45.         x = random.randint(1,self.area[0]/10)*10  
46.         y = random.randint(1,self.area[1]/10)*10  
47.         return (x,y)  
48.       
49.     def FoodManufacture(self):  
50.         self.foodLoc = self.__RandPoint()  
51.       
52.     def foodInstantiate(self,dc):   
53.         food = self.foodLoc + (self.foodWidth,self.foodWidth)  
54.         dc.DrawRectangle(*food)  
55.       
56.     def __Fission(self):     
57.         ''''' 
58.         抛洒尸骸 
59.         '''  
60.         point = self.__RandPoint()  
61.         if point in self.snakeDebris or point == self.foodLoc:  
62.             self.__Fission()  
63.         else:  
64.             return point  
65.           
66.     def SnakeFission(self):  
67.         ''''' 
68.         蛇断尾 
69.         '''  
70.         length = len(self.snake)/2  
71.         while length > 0:  
72.             index = len(self.snake) - 1  
73.             self.snake.pop(index)#删除末位  
74.             point = self.__Fission()  
75.             self.snakeDebris.append(point)  
76.             length -= 1  
77.               
78.     def SnakeFissionInstantiate(self,dc):  
79.         for debris in self.snakeDebris:  
80.             d = debris +  (self.foodWidth,self.foodWidth)  
81.             dc.DrawRectangle(*d)  
82.                   
83.     def SnakeMove(self):  
84.         length = len(self.snake)  
85.         self.snake.pop(length-1)#shift  
86.         space = self.snakeSpace  
87.         x = 0  
88.         y = 0  
89.         if self.snakeDire == 317:  
90.             y = space  
91.         elif self.snakeDire == 316:  
92.             x = space  
93.         elif self.snakeDire == 315:  
94.             y = -space  
95.         elif self.snakeDire == 314:  
96.             x = -space  
97.         newhead = (self.snakeHead[0] + x,self.snakeHead[1] + y)  
98.         self.GameOver(newhead)  
99.               
100.         self.snake.insert(0,newhead)  
101.         self.snakeHead = newhead  
102.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
103.         dc.SetPen(self.pen)  
104.         dc.Clear()  
105.         self.SnakeInstantiate(dc)  
106.           
107.     def SnakeInstantiate(self,dc):      
108.         ''''' 
109.         画出蛇与食物 
110.         '''  
111.         self.foodInstantiate(dc)  
112.         last = self.snake[0]  
113.         length = len(self.snake)  
114.         for s in self.snake[1:length]:  
115.             line = last + s  
116.             dc.DrawLine(*line)  
117.             last = s  
118.           
119.         if self.Eat():  
120.             if len(self.snake) > 5:  
121.                 self.SnakeFission()  
122.         pen = wx.Pen('red',self.snakeThickness,wx.SOLID)  
123.         dc.SetPen(pen)  
124.         self.SnakeFissionInstantiate(dc)  
125.           
126.     def Eat(self):  
127.         if self.snakeHead == self.foodLoc:  
128.             self.snake.insert(0, self.foodLoc)  
129.             self.FoodManufacture()  
130.             return True  
131.         else :  
132.             return False  
133.       
134.     def GameOver(self,newhead):  
135.         print newhead  
136.         if newhead in self.snake or newhead in self.snakeDebris:  
137.             self.runtime.Stop()  
138.             print 'autotomy'  
139.             return True  
140.         elif newhead[0] < 0 or newhead[0] > self.area[0] or newhead[1] < 0 or newhead[1] > self.area[1]:  
141.             self.runtime.Stop()  
142.             print 'out'  
143.             return True  
144.         else :  
145.             return False  
146.       
147.     def OnTimer(self,event):  
148.         self.SnakeMove()  
149.               
150.     def OnKeyUp(self,event):  
151.         code = event.GetKeyCode()  
152.         if code >= 314 and code <=317 and code != self.snakeDire - 2 and code != self.snakeDire + 2:  
153.             self.snakeDire = code  
154.         #self.SnakeMove()       
155.           
156.     def OnPaint(self, event):  
157.         dc = wx.BufferedPaintDC(self, self.buffer)#13 处理一个paint（描绘）请求  
158.   
159.     def OnLeftUp(self, event):  
160.         dc = wx.BufferedDC(wx.ClientDC(self),self.buffer)  
161.         dc.SetPen(self.pen)  
162.         pos = event.GetPositionTuple()  
163.         pos = pos + (10,10)  
164.         dc.Clear()  
165.         dc.DrawRectangle(*pos)  
166.         print 'drawpoint'  
167.       
168. class SnakeFrame(wx.Frame):  
169.     def __init__(self,parent):  
170.         wx.Frame.__init__(self,parent,-1,'title',size=(800,600))   
171.           
172.         size = self.__AreaSize(self.GetClientSize())  
173.           
174.         panel = wx.Panel(self)  
175.         panel.SetBackgroundColour('#4f5049')  
176.           
177.         border = 10  
178.           
179.         self.sketch = SnakeWindow(panel,size,2*border)  
180.       
181.         box = wx.BoxSizer(wx.VERTICAL)  
182.           
183.         box.Add(self.sketch,1,wx.ALIGN_TOP|wx.ALL,border)  
184.         panel.SetSizer(box)  
185.   
186.     def __AreaSize(self,size):  
187.         width = self.__AreaMath(size[0])  
188.         height = self.__AreaMath(size[1])  
189.         return (width,height)  
190.       
191.     def __AreaMath(self,intparam):  
192.         if intparam%10 < 5:  
193.             return intparam/10 * 10  
194.         else:  
195.             return (intparam/10 + 1)*10  
196.    
197. if __name__ == '__main__':  
198.     app = wx.PySimpleApp()  
199.     frame = SnakeFrame(None)  
200.     frame.Show(True)  
201.     app.MainLoop()             
202.