Fun Learning Python Pinball game stage IV-Full screen strum

It has been possible to bounce the ball up and down in the vertical direction. Next, continue to follow the "fun learning python--teach children to learn programming", began to let the ball bounce around the whole picture up and down.

In the program, the x-axis is defined as a random starting value, and the positive and negative values are there, so in the transverse direction, the ball will start from the left or right.

In the program, the y-axis is defined only-3, that is, in the longitudinal direction, the beginning of the ball can only move upward, of course, the starting direction can also be in accordance with the x-axis, with a random number to change the starting direction of the upper and lower.

In the previous program, the starting pixel values were 1 and 1, and now it's changed to 3 and-3, just so that the ball can move faster each time it is redrawn.

#引入下列模块from  tkinter import *                                                    #画图模块import  random                                                            #随机数模块import  time                                                              #时间模块 # Create Ball class class ball:     def __init__ (Self,canvas,color):                                    #初始化函数 with canvas and color parameters         self.canvas  = canvas                                            #把参数canvas赋值给对象变量canvas          self.id = canvas.create_oval (10,10,25,25,fill=color)            #创建椭圆, Upper-left and lower-right XY coordinates, returns the id        self.canvas.move representing the graphic ( SELF.ID,245,100)                               #把画好的椭圆形移动的画布中心, graphical ID representation          starts = [-3,-2,-1,1,2,3]                                       #给一串x分量的起始值 (x and y represent the horizontal and vertical components)          random.shuffle (starts)                                           #随机混排序, assign a value to the object variable x to get the random component value when it starts, causing the ball to start at different angles each time.         self.x = starts[0]                                              #对象变量x就是水平分量移动的初始值, equivalent to moving left and right , the value represents how many pixels are moved         self.y = -3                                                      #对象变量y就是垂直分量移动的初始值, equivalent to moving up and down          self.canvas_height = self.canvas.winfo_height ()                 #获取画布的高度, the canvas height is measured from top to bottom                         Self.canvas_width = selF.canvas.winfo_width ()                   #获取画布的宽度         def draw (self):                                                      #定义画图动作          self.canvas.move (SELF.ID,SELF.X,SELF.Y)                         #按照x和y定义的像素值来移动小球, such as 3, is to move 3 pixel locations.          pos = self.canvas.coords (self.id)                                #coords函数通过id返回画布球的坐标列表, Pos[x1,y1,x2,y2], representing the XY coordinates of the lower-left upper-right corner of the ellipse, respectively          if pos[1] <= 0:                                                # When the upper-left corner of the ball y1 coordinates less than or equal to 0, it touches the top of the canvas             self.y =  3                                                  #重新设置对象变量y为3, start the vertical component Move down          if pos[3] >= self.canvas_height:                                #当球右下角y2坐标超过画布高度 (bottom)              self.y = -3                                                 #重新设置对象变量y为-3, Start vertical component Move up         if pos[0] <= 0:                                                  #当球左上角x1坐标小于等于0, which touches the left border of the canvas              self.x = 3                                                  #重新设置对象变量x为3, start horizontal component Move right          if pos[2] >= self.canvas_width:                                 #当球右下角x2坐标超过画布有边框              self.x = -3                                                  #重新设置对象变量x为-3, start horizontal component shift leftMove              #创建游戏的桌布tk  = tk ()                                                                  #用Tk () class creates a Tk object, which is a basic window on which you can add something else tk.title ("Game")                                                          #给Tk对象窗口加一个标题tk. Resizable (0,0)                                                        #tk窗口大小不可调整tk. Wm_attributes ("-topmost", 1)                                           #告诉tkinter把窗口放到最前面canvas  = canvas (tk,width=500,heigh=400,bd=0,highlightthickness=0 )      #Canvas是一个画布类canvas. Pack ()                                                             #按照上面一行指定的宽度高度参数调整其自身大小tk. Update ()                                                               #update强制更新屏幕, Re-draw # Draw a red ball ball = ball (canvas, ' red ')                                               # Draw a red ball on the canvas with the balls # main loop, let Tkinter keep redrawing the screen While 1:    ball.draw ()                                                           #调用Ball类的作画函数     tk.update_idletasks ()                                                 #updata_idletasks和updata这两个命令     tk.update ()                                                         # Get Tkinter to paint something on the canvas.     time.sleep (0.01)                                                     # Delay to slow down the animation effect

Fun Learning Python Pinball game stage IV-Full screen strum