From 9fb67d019437a489561a6c956fd6060c8b6ce9b9 Mon Sep 17 00:00:00 2001
From: Marty Oehme <marty.oehme@gmail.com>
Date: Sun, 8 Jul 2018 19:08:40 +0200
Subject: [PATCH 1/2] Add return of new cell state to advanceState Function

---
 lib/src/Cell.dart | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/src/Cell.dart b/lib/src/Cell.dart
index f472280..b10142b 100644
--- a/lib/src/Cell.dart
+++ b/lib/src/Cell.dart
@@ -11,11 +11,15 @@ class Cell {
 
   Cell([bool state = false]) : this.state = state;
 
-  void advanceState() {
+  // Sets the actual state to what it should be next update
+  // Returns the newly assumed actual state of the cell.
+  bool advanceState() {
     this.state = this.nextState;
     this.nextState = false;
 
     this.dirty = true;
+
+    return this.state;
   }
 
   void update(int neighbors) {

From 1146c7d265838f2691b33fa5b00517c49e4ff3c8 Mon Sep 17 00:00:00 2001
From: Marty Oehme <marty.oehme@gmail.com>
Date: Sun, 8 Jul 2018 19:32:43 +0200
Subject: [PATCH 2/2] Add Check for State Changes During Grid Update

---
 lib/src/App.dart  |  2 +-
 lib/src/Grid.dart | 10 +++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/src/App.dart b/lib/src/App.dart
index 8ab933a..140e9a3 100644
--- a/lib/src/App.dart
+++ b/lib/src/App.dart
@@ -56,7 +56,7 @@ class App {
 
   void update() {
 //    print("updating");
-    grid.update();
+    if(!grid.update()) running = false;
   }
 
   void render([num interp]) {
diff --git a/lib/src/Grid.dart b/lib/src/Grid.dart
index a25a50e..f47e5bf 100644
--- a/lib/src/Grid.dart
+++ b/lib/src/Grid.dart
@@ -143,7 +143,8 @@ class Grid {
     return grid;
   }
 
-  void update() {
+  bool update() {
+    bool stateChanges = false;
     for (int y = 0; y < h; y++) {
       for (int x = 0; x < w; x++) {
         // DEFAULTS TO CONWAY GAME OF LIFE RANGE OF ONE
@@ -152,11 +153,14 @@ class Grid {
     }
     for (int y = 0; y < h; y++) {
       for (int x = 0; x < w; x++) {
-        // DEFAULTS TO CONWAY GAME OF LIFE RANGE OF ONE
-        map[y][x].advanceState();
+        Cell c = map[y][x];
+        if(c.state != c.nextState) stateChanges = true;
+        c.advanceState();
+
         if (!_dirty && map[y][x].dirty) _dirty = true;
       }
     }
+    return stateChanges;
   }
 
   int getSurroundingNeighbors(int x, int y, int range) {