John Conway's Game Of Life: Threaded Edition

Some of the following code is adapted from https://jakevdp.github.io/blog/2013/08/07/conways-game-of-life/

In [ ]:
from time import sleep
from threading import Thread

import numpy as np

from ipycanvas import RoughCanvas, hold_canvas
In [ ]:
def life_step(x):
    """Game of life step"""
    nbrs_count = sum(np.roll(np.roll(x, i, 0), j, 1)
                     for i in (-1, 0, 1) for j in (-1, 0, 1)
                     if (i != 0 or j != 0))
    return (nbrs_count == 3) | (x & (nbrs_count == 2))
In [ ]:
def draw(x, canvas, color='black'):
    with hold_canvas(canvas):
        canvas.clear()
        canvas.fill_style = '#FFF0C9'
        canvas.stroke_style = 'white'
        canvas.fill_rect(0, 0, canvas.size[0], canvas.size[1])

        canvas.fill_style = color
        canvas.stroke_style = color

        living_cells = np.where(x)
        
        rects_x = living_cells[0] * n_pixels
        rects_y = living_cells[1] * n_pixels

        canvas.fill_rects(rects_x, rects_y, n_pixels)
        canvas.stroke_rects(rects_x, rects_y, n_pixels)
In [ ]:
glider_gun =\
[[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0],
 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0],
 [0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
 [0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
 [1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
 [1,1,0,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0],
 [0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0],
 [0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
 [0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]]

x = np.zeros((50, 70), dtype=bool)
x[1:10,1:37] = glider_gun
In [ ]:
n_pixels = 15

canvas = RoughCanvas(width=x.shape[1]*n_pixels, height=x.shape[0]*n_pixels)
canvas.fill_style = '#FFF0C9'
canvas.stroke_style = 'white'
canvas.fill_rect(0, 0, canvas.size[0], canvas.size[1])

canvas
In [ ]:
draw(x, canvas, '#5770B3')
In [ ]:
class GameOfLife(Thread):
    def __init__(self, x, canvas):
        self.x = x
        self.canvas = canvas
        super(GameOfLife, self).__init__()

    def run(self):
        for _ in range(1_000):
            self.x = life_step(self.x)
            draw(self.x, self.canvas, '#5770B3')

            sleep(0.1)

GameOfLife(x, canvas).start()