From 55b714abf83e01aa0ff513ad6ba4978f4b4da6cd Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Thu, 9 Nov 2023 16:46:33 -0600
Subject: add basic game of life lattice rules

---
 src/world/lattice.test.js |  9 +++++++++
 src/world/world.js        | 19 +++++++++++++++----
 2 files changed, 24 insertions(+), 4 deletions(-)

(limited to 'src/world')

diff --git a/src/world/lattice.test.js b/src/world/lattice.test.js
index 7c71d04..c2fdb6b 100644
--- a/src/world/lattice.test.js
+++ b/src/world/lattice.test.js
@@ -34,6 +34,15 @@ test("growth update rule", () => {
 });
 
 
+//test("agents cannot move into non-empty tiles", () => {
+//  const lattice = [[ {type: 'empty', flags: {}}, {type: 'filled', flags: {}} ]];
+//  const bad_prop = [{ agent_updates: [{ agent_id: 14, x: 1, y: 0 }] }];
+//  expect(lattice_valid(lattice, bad_prop)).toBe(false);
+//  const good_prop = [{ agent_updates: [{ agent_id: 14, x: 0, y: 0 }] }];
+//  expect(lattice_valid(lattice, bad_prop)).toBe(true);
+//});
+
+
 test("growth update rule applied", () => {
   const lattice = [[ 
     { type: 'empty', flags: {} }, 
diff --git a/src/world/world.js b/src/world/world.js
index c824e91..87d0aed 100644
--- a/src/world/world.js
+++ b/src/world/world.js
@@ -1,19 +1,30 @@
+import { lattice_update, lattice_valid, lattice_apply } from './lattice.js';
+import { agent_decide, agent_apply } from './agent.js';
+import { proposal_merge } from './proposal.js';
+
+
 export function world_update(world, postprocess=[]) {
   const lattice_props = lattice_update(world.lattice, world.lattice_rules);
   const intermediate_lattice = lattice_apply(world.lattice, lattice_props);
 
-  const agent_props = world.agents
+  const decisions = world.agents
     .map(a => agent_decide(world.lattice, agent, world.senses, world.actions))
+    .reduce(
+      ([agents, props], [agent, prop]) => [[...agents, agent], [...props, prop]],
+      [[], []]
+    );
+  const intermediate_agents = decisions[0];
+  const agent_props = decisions[1]
     .flat()
     .reduce((acc, prop) => proposal_merge(acc, prop), [])
     .filter(prop => lattice_valid(intermediate_lattice, prop))
 
   const lattice = lattice_apply(intermediate_lattice, agent_props);
-  const agents = world.agents.map(a => agent_apply(a, agent_props));
+  const agents = intermediate_agents.map(a => agent_apply(a, agent_props));
 
-  const world = {...world, lattice, agents};
+  const new_world = {...world, lattice, agents};
   return postprocess.reduce(
     (acc, f) => f(acc),
-    world
+    new_world
   );
 }
-- 
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