From c582fd133c756d5fa5d9158c452ff7a47b524683 Mon Sep 17 00:00:00 2001
From: k <markers711@gmail.com>
Date: Sat, 3 May 2025 20:42:39 -0400
Subject: [PATCH] working game of life

---
 shaders.hpp | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/shaders.hpp b/shaders.hpp
index 6c93406..87d5fc6 100644
--- a/shaders.hpp
+++ b/shaders.hpp
@@ -19,12 +19,19 @@ int alive(ivec2 uv){
   return int(px.r > 0.5);
 }
 
-void main() {
-    ivec2 uv = ivec2(gl_GlobalInvocationID.xy);
+void main(){
+  ivec2 uv = ivec2(gl_GlobalInvocationID.xy);
+  int state = alive(uv);
+  int cnt = 0;
 
-    vec4 c = texelFetch(srcTex,uv,0);
-    int newState = alive(uv-ivec2(1,1));
-    imageStore(destTex, uv, vec4(newState, newState, newState, 1.0));
+  for(int y = -1; y <= 1; ++y)
+    for(int x = -1; x <= 1; ++x){
+      if(x == 0 && y == 0) continue;
+      cnt += alive((uv + ivec2(x,y)));
+    }
+
+  int newState = ((state == 1 && (cnt == 2 || cnt == 3)) || (state == 0 && cnt == 3)) ? 1 : 0;
+  imageStore(destTex, uv, vec4(newState, newState, newState, 1.0));
 }
 )glsl";