1 files changed, 23 insertions, 1 deletions
diff --git a/src/simulation/actions.js b/src/simulation/actions.js
index e389518..62a8395 100644
--- a/src/simulation/actions.js
+++ b/src/simulation/actions.js
@@ -137,7 +137,29 @@ const pretend_frozen = {
 };
 
 
+const unfreeze = {
+  size: 1,
+  propose: (world, agent, head) => {
+    if (head[0] < threshold) { return []; }
+    else {
+      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
+      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
+      const target = world.agents.filter(
+        a => a.x === agent.x+dx && a.y === agent.y+dy
+      )[0];
+      if (target === undefined) { return []; }
+      return [
+        { agent_changes: [{
+          agent_id: target.id,
+          flags: { frozen: false, emit: [0, 1, 0, 0, 0, 0, 0, 0] },
+        }]}
+      ];
+    }
+  },
+};
+
+
 export const actions = [
   move_forward, move_backward, turn_left, turn_right, 
-  place, trigger, pretend_frozen,
+  place, trigger, pretend_frozen, unfreeze,
 ];