site-bkgs

commit 520828a3467da9dddaa901e27670b0a5c9cb0338
parent 88590b291d4cb0e3534f4e2c50a4e00bc818ae98
Author: Ryan Jeffrey <ryan@ryanmj.xyz>
Date:   Tue, 20 Apr 2021 14:13:31 -0700

Get the total number of alive neighbors.

Diffstat:
M
conway.js
 | 
23
+++++++++++++++++++++++

1 file changed, 23 insertions(+), 0 deletions(-)
diff --git a/conway.js b/conway.js
@@ -62,6 +62,29 @@ function init() {
 }
 
 
+// get the total number of neighboring cells that are alive.
+function totalAliveNeighbors()
+{
+  let sum = 0;
+  let newX = 0;
+  let newY = 0;
+  for(let i = -1; i < 2; i++)
+  {
+    for(let j = -1; j < 2; j++)
+    {
+      newX = (x + i + rows) % rows;
+      newY = (y + j + cols) % cols;
+      if(cells[newX][newY] == lifeState.alive)
+        sum++;
+    }
+  }
+
+  if(cells[x][y] == lifeState.alive)
+    sum--;
+  
+  return sum;    
+}
+
 
 function startAnimating(fps) {
   fpsInterval = 1000 / fps;