汇智学堂-python小游戏(弹球游戏之九-不同角度的反弹及游戏结束的判断)
3.9不同角度的反弹及游戏结束的判断
现在我们要解决不同角度下,球的反弹及游戏结束的判断。下面是我们要做的事情。
1、解决不同角度下,球的反弹。
2、解决三种情况的游戏结束。第一种球落到了底部。第二种球板撞到了墙的左侧,第三种球板撞到了墙的右侧。
球板中draw实现代码如下:
def draw(self):
global closeornot
pos = self.canvas.coords(self.id)
if pos[0] <= 0:
self.x = 0
closeornot=0
if pos[0]>=700:
self.x=0
closeornot=0
self.canvas.move(self.id,self.x,0)
if self.collision(pos)==True:
self.ball.y=-5
def collision(self,pos):
posball = self.canvas.coords(self.ball.id)
if posball[1]<=pos[3] and posball[2]>=pos[0] and posball[0]<=pos[2]
and posball[3]>=pos[1]:
return True
return False
球中的draw函数实现代码如下:
def draw(self):
global direction,closeornot
position=canvas.coords(self.id)
if position[3]>=800:
closeornot=0
if position[1]<=0:
self.y=5
if position[0]<=0:
self.x=3
if position[2]>=800:
self.x=-3
self.canvas.move(self.id,self.x,self.y)
整合后,完整的代码如下:
#-- coding:GBK --
from tkinter import *
import time
import random
import tkinter.messagebox #messagebox
closeornot=1
position=[1,1,1,1]
tk = Tk()
tk.title(“雷雷的弹球游戏”)
tk.resizable(0, 0)
tk.wm_attributes("-topmost", 1)
canvas = Canvas(tk, width=800, height=800, bd=0, highlightthickness=0)
canvas.pack()
tk.update()
class racket:
def init(self,canvas,color,ball):
self.canvas=canvas
self.x=0
self.id=canvas.create_rectangle(400, 600, 500, 620, fill =color)
self.canvas.bind_all(’’, self.turn_left)
self.canvas.bind_all(’’, self.turn_right)
self.ball=ball
def turn_left(self,evt):
self.x=-5
def turn_right(self, evt):
self.x = 5
def draw(self):
global closeornot
pos = self.canvas.coords(self.id)
if pos[0] <= 0:
self.x = 0
closeornot=0
if pos[0]>=700:
self.x=0
closeornot=0
self.canvas.move(self.id,self.x,0)
if self.collision(pos)==True:
self.ball.y=-5
def collision(self,pos):
posball = self.canvas.coords(self.ball.id)
if posball[1]<=pos[3] and posball[2]>=pos[0] and posball[0]<=pos[2] \
and posball[3]>=pos[1]:
return True
return False
class ball:
def init(self,canvas,color):
self.canvas=canvas
self.a=random.randint(50,600)
self.b=random.randint(50,200)
self.id=canvas.create_oval(self.a, self.b, self.a+20, self.b+20, fill =color)
starts = [-3, -2, -1, 1, 2, 3]
random.shuffle(starts)
self.x = starts[0]
self.y=5
def draw(self):
global direction,closeornot
position=canvas.coords(self.id)
if position[3]>=800:
closeornot=0
if position[1]<=0:
self.y=5
if position[0]<=0:
self.x=3
if position[2]>=800:
self.x=-3
self.canvas.move(self.id,self.x,self.y)
ball=ball(canvas,‘red’)
racket=racket(canvas,‘green’,ball)
while 1:
if closeornot==1:
racket.draw()
ball.draw()
else:
canvas.create_text(400,420,text=“游戏结束”,fill=‘red’,font=(‘Times’,110))
tk.update_idletasks()
tk.update()
time.sleep(0.05)
运行这段代码,球板撞到左侧墙壁,提示:游戏已结束,见图3-25。球板撞到右侧墙壁,提示:游戏已结束,见图3-26。球撞到底侧墙壁,提示:游戏已结束,见图3-27。
图3-25
图3-26
图3-27