#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Testing out some animation in curses with a bouncing ball. """ import curses import time def main(scr): """ Draw a ball that bounces and changes direction when hitting the sides. Press any key to quit. """ # Don't stop the while-loop while waiting for input scr.nodelay(1) # Draw a border scr.border() # Make cursor invisible curses.curs_set(0) # Get dimensions max_y, max_x = scr.getmaxyx() # The ball my_str = "O" # Starting position x, y = 0, 0 # Directions vert, hori = 1, 1 # Do until exit while True: # Move x and y in the current directions x += hori y += vert # Check if new x and y is at any edge and bounce it if it is # top and bottom if y in (max_y - 1, 0): vert = -vert # reverse # left and right if x in (max_x - len(my_str), 0): hori = -hori # reverse # Draw the ball scr.addstr(y, x, my_str) scr.refresh() # Allow for an exit-key - any key pressed q = scr.getch() if q > -1: break # Sleep until next round time.sleep(0.05) if __name__ == "__main__": print(__doc__) print(main.__doc__) input("Press enter to begin playing...") curses.wrapper(main)