From 0d707d4ffb2727584791260cf0ad0cdc36b3ee03 Mon Sep 17 00:00:00 2001
From: Niclas Dobbertin <niclas.dobbertin@mailbox.org>
Date: Tue, 14 Jul 2026 23:18:59 +0200
Subject: some automata

---
 2d_automata.py | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 2d_automata.py

(limited to '2d_automata.py')

diff --git a/2d_automata.py b/2d_automata.py
new file mode 100644
index 0000000..d27b536
--- /dev/null
+++ b/2d_automata.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+
+import pyray as pr
+import random
+import numpy as np
+import time
+
+screen_width = 1000
+screen_height = 1000
+
+pr.init_window(screen_width, screen_height, "Hello")
+
+cols = 20
+rows = 20
+grid = np.random.randint(2, size=(rows, cols))
+# grid = np.zeros((100, 100))
+# grid[0][1] = 1
+# grid[1][2] = 1
+# grid[2][0] = 1
+# grid[2][1] = 1
+# grid[2][2] = 1
+# grid = np.array([[1, 0, 0, 1], [1, 0, 1, 1], [1, 0, 0, 1], [0, 0, 1, 1]])
+
+
+col_space = int(screen_width / cols)
+row_space = int(screen_height / rows)
+
+def draw_game(grid):
+    y = 0
+    for i in grid:
+        x = 0
+        for j in i:
+            if j == 1:
+                pr.draw_rectangle(x, y, col_space, row_space, pr.BLACK)
+            else:
+                pr.draw_rectangle(x, y, col_space, row_space, pr.WHITE)
+            x += col_space
+        y += row_space
+
+""" Rules of Conway's game of life:
+1. Any live cell with fewer than two live neighbours dies, as if by
+underpopulation.
+2. Any live cell with two or three live neighbours lives on to the next
+generation.
+3. Any live cell with more than three live neighbours dies, as if by
+overpopulation.
+4. Any dead cell with exactly three live neighbours becomes a live cell,
+as if by reproduction.
+"""
+
+
+def apply_conway(grid):
+    new_grid = np.zeros((rows, cols))
+    for j, row in enumerate(grid):
+        for i, cell in enumerate(row):
+            neighbours = 0
+            # right neighbour
+            # print(
+            #     f"I'm {i+1} and {"alive" if cell == 1 else "dead"}, my right neighbour is {((i+1)%cols) +1} and {"alive" if grid[j][(i+1)%cols] == 1 else "dead"}"
+            # )
+            if grid[j][(i+1)%cols] == 1:
+                neighbours += 1
+            # left neighbour
+            if grid[j][(i-1)%cols] == 1:
+                neighbours += 1
+            # bottom neighbour
+            if grid[(j+1) % rows][i] == 1:
+                neighbours += 1
+            # top neighbour
+            if grid[(j-1) % rows][i] == 1:
+                neighbours += 1
+            # print(f"Cell in row {j}, col {i} has {neighbours} neighbours")
+            # top right neighbour
+            if grid[(j-1) % rows][(i+1)%cols] == 1:
+                neighbours += 1
+            # top left neighbour
+            if grid[(j-1) % rows][(i-1)%cols] == 1:
+                neighbours += 1
+            # bottom right neighbour
+            if grid[(j+1) % rows][(i+1)%cols] == 1:
+                neighbours += 1
+            # bottom left neighbour
+            if grid[(j+1) % rows][(i-1)%cols] == 1:
+                neighbours += 1
+
+            # Rule 1
+            if cell == 1 and neighbours < 2:
+                new_grid[j, i] = 0
+            # Rule 2
+            if cell == 1 and neighbours == 2:
+                new_grid[j, i] = 1
+            if cell == 1 and neighbours == 3:
+                new_grid[j, i] = 1
+            # Rule 3
+            if cell == 1 and neighbours > 3:
+                new_grid[j, i] = 0
+            # Rule 4
+            if cell == 0 and neighbours == 3:
+                new_grid[j, i] = 1
+
+            # TODO: consider alternative compute to avoid all the ifs: add all
+            # nine fields, if 3 life, if 4 stay current state, else dead
+
+    return new_grid
+
+first_iter = True
+while not pr.window_should_close():
+    if not first_iter:
+        grid = apply_conway(grid)
+
+    pr.begin_drawing()
+    pr.clear_background(pr.WHITE)
+    # pr.draw_text("Hello World", 190, 200, 20, pr.VIOLET)
+
+    draw_game(grid)
+    pr.end_drawing()
+    time.sleep(.5)
+    first_iter = False
+pr.close_window()
-- 
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