From 00886d2e07d4cffe575dc01a5d2c3bfe2f81a131 Mon Sep 17 00:00:00 2001
From: Baipyrus <simon.waltemathe@gmail.com>
Date: Mon, 15 Apr 2024 01:26:37 +0200
Subject: [PATCH] boundary wrapping

---
 conway.go | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/conway.go b/conway.go
index 777fad5..2799053 100644
--- a/conway.go
+++ b/conway.go
@@ -13,6 +13,10 @@ type Cell struct {
 }
 
 func (c *Cell) NeighborCount(arr [][]Cell) int {
+	// Read grid dimensions
+	width := len(arr)
+	height := len(arr[0])
+
 	count := 0
 	// Iterate through 3x3 neighboring grid
 	for i := -1; i <= 1; i++ {
@@ -22,11 +26,8 @@ func (c *Cell) NeighborCount(arr [][]Cell) int {
 				continue
 			}
 			// Get neighbor coordinates
-			nx, ny := c.x+i, c.y+j
-			// Check if neighbor is within bounds
-			if nx < 0 || nx >= len(arr) || ny < 0 || ny >= len(arr[0]) {
-				continue
-			}
+			nx := (c.x + i + width) % width
+			ny := (c.y + j + height) % height
 			// Count if neighbor is alive
 			if arr[nx][ny].live {
 				count++