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POMove a ball inside Tkinter Canvas Widget (simple Arkanoid game)
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  1. POMove a ball inside Tkinter Canvas Widget (simple Arkanoid game)
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    copied!<p>I'm trying to write a simple Arkanoid with the help of Python and Tkinter. The goal is to make the ball reflect from the top, right and left sides. And if the player misses the ball so it touches the bottom side, the game would stop.</p> <p>Here's the code:</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('&lt;Right&gt;', move_right) root.bind('&lt;Left&gt;', move_left) root.geometry('%sx%s+%s+%s' %(640, 480, 100, 100)) root.resizable(0, 0) root.mainloop() </code></pre> <p>Why the ball reflecting in the wrong way?</p> <p><img src="https://i.stack.imgur.com/Ff3qW.png" alt="screenshot of program"></p>
 

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