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<p>我试图在Python和Tkinter的帮助下编写一个简单的Arkanoid。目标是使球从顶部、右侧和左侧反射。如果球员错过了球,球碰到了底部,比赛就会停止。</p>
<p>代码如下:</p>
<pre><code>from Tkinter import *
import time
root = Tk()
canv = Canvas(root, highlightthickness=0)
canv.pack(fill='both', expand=True)
top = canv.create_line(0, 0, 640, 0, fill='green', tags=('top'))
left = canv.create_line(0, 0, 0, 480, fill='green', tags=('left'))
right = canv.create_line(639, 0, 639, 480, fill='green', tags=('right'))
bottom = canv.create_line(0, 478, 640, 478, fill='red', tags=('bottom'))
rect = canv.create_rectangle(270, 468, 365, 478, outline='black', fill='gray40', tags=('rect'))
ball = canv.create_oval(0, 20, 20, 40, outline='black', fill='gray40', tags=('ball'))
delta_x = delta_y = 3
new_x, new_y = delta_x, -delta_y
while True:
time.sleep(0.025)
if canv.find_overlapping(canv.coords(ball)[0], canv.coords(ball)[1], canv.coords(ball)[2], canv.coords(ball)[3])[0] == 1:
new_x, new_y = delta_x, -delta_y
canv.move(ball, new_x, new_y)
print 'fitst if', new_x, new_y
if canv.find_overlapping(canv.coords(ball)[0], canv.coords(ball)[1], canv.coords(ball)[2], canv.coords(ball)[3])[0] == 2:
new_x, new_y = delta_x, delta_y
canv.move(ball, new_x, new_y)
print '2nd if', new_x, new_y
if canv.find_overlapping(canv.coords(ball)[0], canv.coords(ball)[1], canv.coords(ball)[2], canv.coords(ball)[3])[0] == 3:
new_x, new_y = -delta_x, delta_y
canv.move(ball, new_x, new_y)
if canv.find_overlapping(canv.coords(ball)[0], canv.coords(ball)[1], canv.coords(ball)[2], canv.coords(ball)[3])[0] == 4:
new_x, new_y = delta_x, -delta_y
canv.move(ball, new_x, new_y)
print new_x, new_y
canv.move(ball, new_y, new_y)
canv.update()
def move_right(event):
canv.move(rect, 7, 0)
pass
def move_left(event):
canv.move(rect, -7, 0)
pass
root.bind('<Right>', move_right)
root.bind('<Left>', move_left)
root.geometry('%sx%s+%s+%s' %(640, 480, 100, 100))
root.resizable(0, 0)
root.mainloop()
</code></pre>
<p>为什么球反射的方向不对?</p>
<p><img src="https://i.stack.imgur.com/Ff3qW.png" alt="screenshot of program"/></p>