2 files changed, 69 insertions, 52 deletions
diff --git a/src/simulation/lattice_rules.js b/src/simulation/lattice_rules.js
index 0f46d0d..db027a3 100644
--- a/src/simulation/lattice_rules.js
+++ b/src/simulation/lattice_rules.js
@@ -30,7 +30,10 @@ export const lattice_rules = {
       .filter(type => type === 'mutable' || type === 'active')
       .length;
     if (num_active_neighbors === 3) {
-      return { world_updates: [{ x, y, from: 'empty', to: 'active' }] };
+      return { world_updates: [{ 
+        x, y, from: 'empty', to: 'active',
+        flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] },
+      }]};
     }
   },
 
@@ -39,10 +42,14 @@ export const lattice_rules = {
       .map(([x, y, cell]) => cell.type)
       .filter(type => type === 'mutable' || type === 'active')
       .length;
+    const die = { world_updates: [{ 
+      x, y, from: 'active', to: 'empty', 
+      flags: { emit: [0, 0, 0, 0, 0, 0, 0, -1] }, 
+    }]};
     if (num_active_neighbors < 2) {
-      return { world_updates: [{ x, y, from: 'active', to: 'empty' }] };
+      return die;
     } else if (num_active_neighbors > 3) {
-      return { world_updates: [{ x, y, from: 'active', to: 'empty' }] };
+      return die;
     }
   },
 
diff --git a/src/simulation/lattice_rules.test.js b/src/simulation/lattice_rules.test.js
index e541add..4b78116 100644
--- a/src/simulation/lattice_rules.test.js
+++ b/src/simulation/lattice_rules.test.js
@@ -13,85 +13,95 @@ function apply(f, n, x0) {
 
 test("blinker", () => {
   const L = { type: 'active', flags: {} };
-  const D = { type: 'empty', flags: {} };
+  const _ = { type: 'empty', flags: {} };
+  const l = { type: 'active', flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] } };
+  const d = { type: 'empty', flags: { emit: [0, 0, 0, 0, 0, 0, 0, -1] } };
   const lattice = [
-    [ D, D, D, D, D ],
-    [ D, D, D, D, D ],
-    [ D, L, L, L, D ],
-    [ D, D, D, D, D ],
-    [ D, D, D, D, D ],
+    [ _, _, _, _, _ ],
+    [ _, _, _, _, _ ],
+    [ _, L, L, L, _ ],
+    [ _, _, _, _, _ ],
+    [ _, _, _, _, _ ],
   ];
 
   const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
   expect(world_update(world).lattice).toEqual([
-    [ D, D, D, D, D ],
-    [ D, D, L, D, D ],
-    [ D, D, L, D, D ],
-    [ D, D, L, D, D ],
-    [ D, D, D, D, D ],
+    [ _, _, _, _, _ ],
+    [ _, _, l, _, _ ],
+    [ _, d, L, d, _ ],
+    [ _, _, l, _, _ ],
+    [ _, _, _, _, _ ],
+  ]);
+  expect(world_update(world_update(world)).lattice).toEqual([
+    [ _, _, _, _, _ ],
+    [ _, _, d, _, _ ],
+    [ _, l, L, l, _ ],
+    [ _, _, d, _, _ ],
+    [ _, _, _, _, _ ],
   ]);
-  expect(world_update(world_update(world)).lattice).toEqual(lattice);
 });
 
 
 test("glider", () => {
   const L = { type: 'active', flags: {} };
-  const D = { type: 'empty', flags: {} };
+  const _ = { type: 'empty', flags: {} };
+  const l = { type: 'active', flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] } };
+  const d = { type: 'empty', flags: { emit: [0, 0, 0, 0, 0, 0, 0, -1] } };
   const lattice = [
-    [ D, D, D, D, D, D ],
-    [ D, D, D, L, D, D ],
-    [ D, L, D, L, D, D ],
-    [ D, D, L, L, D, D ],
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, L, _, _ ],
+    [ _, L, _, L, _, _ ],
+    [ _, _, L, L, _, _ ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, _, _, _ ],
   ];
 
   const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
   //expect(world_update(world).lattice).toEqual([
   expect(apply(world_update, 1, world).lattice).toEqual([
-    [ D, D, D, D, D, D ],
-    [ D, D, L, D, D, D ],
-    [ D, D, D, L, L, D ],
-    [ D, D, L, L, D, D ],
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, l, d, _, _ ],
+    [ _, d, _, L, l, _ ],
+    [ _, _, L, L, _, _ ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, _, _, _ ],
   ]);
   expect(apply(world_update, 2, world).lattice).toEqual([
-    [ D, D, D, D, D, D ],
-    [ D, D, D, L, D, D ],
-    [ D, D, D, D, L, D ],
-    [ D, D, L, L, L, D ],
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, d, l, _, _ ],
+    [ _, _, _, d, L, _ ],
+    [ _, _, L, L, l, _ ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, _, _, _ ],
   ]);
   expect(apply(world_update, 3, world).lattice).toEqual([
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, D, D ],
-    [ D, D, L, D, L, D ],
-    [ D, D, D, L, L, D ],
-    [ D, D, D, L, D, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, d, _, _ ],
+    [ _, _, l, _, L, _ ],
+    [ _, _, d, L, L, _ ],
+    [ _, _, _, l, _, _ ],
+    [ _, _, _, _, _, _ ],
   ]);
   expect(apply(world_update, 4, world).lattice).toEqual([
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, D, D ],
-    [ D, D, D, D, L, D ],
-    [ D, D, L, D, L, D ],
-    [ D, D, D, L, L, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, d, _, L, _ ],
+    [ _, _, l, d, L, _ ],
+    [ _, _, _, L, l, _ ],
+    [ _, _, _, _, _, _ ],
   ]);
 });
 
 
 test("beehive", () => {
   const L = { type: 'active', flags: {} };
-  const D = { type: 'empty', flags: {} };
+  const _ = { type: 'empty', flags: {} };
   const lattice = [
-    [ D, D, D, D, D, D ],
-    [ D, D, L, L, D, D ],
-    [ D, L, D, D, L, D ],
-    [ D, D, L, L, D, D ],
-    [ D, D, D, D, D, D ],
+    [ _, _, _, _, _, _ ],
+    [ _, _, L, L, _, _ ],
+    [ _, L, _, _, L, _ ],
+    [ _, _, L, L, _, _ ],
+    [ _, _, _, _, _, _ ],
   ];
 
   const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };