export extra topology functions & add agent.js

1 files changed, 55 insertions, 0 deletions

diff --git a/src/world/agent.js b/src/world/agent.js
new file mode 100644
index 0000000..d91481b
--- /dev/null
+++ b/src/world/agent.js
@@ -0,0 +1,55 @@
+'use strict';
+
+import { sense_read } from './sense.js';
+import { proposal_merge } from './proposal.js';
+
+
+export function agent_decide(lattice, agent, senses, actions) {
+  const inputs = senses.map(s => sense_read(lattice, agent, s)).flat();
+  const [result, state] = agent.net.compute(inputs, agent.state);
+
+  const new_agent = { ...agent, state };
+  const [proposals, _] = actions.reduce(
+    ([proposals, result], action) => {
+      const head = result.slice(0, action.size);
+      const tail = result.slice(action.size);
+
+      const props = action
+        .propose(new_agent, head)
+        .reduce(
+          (acc, proposal) => proposal_merge(acc, proposal),
+          proposals
+        );
+
+      return [props, tail];
+    },
+    [[], result]
+  );
+
+  return [new_agent, proposals];
+}
+
+
+function change_apply(agent, ch) {
+  const { x, y, flags } = ch;
+  return {
+    ...agent, 
+    x: (x || agent.x), y: (y || agent.y),
+    flags: { ...agent.flags, ...flags },
+  };
+}
+
+
+export function agent_apply(agent, proposals) {
+  return proposals
+    .filter(p => p.agent_changes)
+    .reduce(
+      (acc, p) => p.agent_changes
+        .filter(ch => ch.agent_id === agent.id)
+        .reduce(
+          (acc_, ch) => change_apply(acc_, ch),
+          acc
+        ),
+        agent
+      );
+}