From f995438c0e72e1d08203609d74854d07dbecd661 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sat, 11 Nov 2023 15:10:55 -0600
Subject: mutables can be activated by living neighbors
---
src/simulation/lattice_rules.js | 14 +++++++++++++-
src/simulation/lattice_rules.test.js | 31 +++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+), 1 deletion(-)
(limited to 'src/simulation')
diff --git a/src/simulation/lattice_rules.js b/src/simulation/lattice_rules.js
index db027a3..80f3221 100644
--- a/src/simulation/lattice_rules.js
+++ b/src/simulation/lattice_rules.js
@@ -53,7 +53,19 @@ export const lattice_rules = {
}
},
- mutable: () => {},
+ mutable: (lattice, x, y) => {
+ const num_active_neighbors = neighbors(lattice, x, y)
+ .map(([x, y, cell]) => cell.type)
+ .filter(type => type === 'active')
+ .length;
+ if (num_active_neighbors > 0) {
+ // become living cell
+ return { world_updates: [{
+ x, y, from: 'empty', to: 'active',
+ flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] },
+ }]};
+ }
+ },
immutable: () => {},
flag: () => {},
diff --git a/src/simulation/lattice_rules.test.js b/src/simulation/lattice_rules.test.js
index 4b78116..7648a68 100644
--- a/src/simulation/lattice_rules.test.js
+++ b/src/simulation/lattice_rules.test.js
@@ -108,3 +108,34 @@ test("beehive", () => {
//expect(world_update(world).lattice).toEqual([
expect(apply(world_update, 1, world).lattice).toEqual(lattice);
});
+
+
+test("mutables are activated by neighboring actives", () => {
+ const L = { type: 'active', 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 M = { type: 'mutable', flags: {} };
+
+ const lattice = [
+ [ _, _, _, _, ],
+ [ _, L, M, _, ],
+ [ _, M, M, _, ],
+ [ _, _, _, _, ],
+ ];
+
+ const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
+
+ expect(apply(world_update, 1, world).lattice).toEqual([
+ [ _, _, _, _, ],
+ [ _, L, l, _, ],
+ [ _, l, l, _, ],
+ [ _, _, _, _, ],
+ ]);
+ expect(apply(world_update, 2, world).lattice).toEqual([
+ [ _, _, _, _, ],
+ [ _, L, L, _, ],
+ [ _, L, L, _, ],
+ [ _, _, _, _, ],
+ ]);
+});
--
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