1 files changed, 20 insertions, 1 deletions
diff --git a/src/simulation/actions.js b/src/simulation/actions.js
index 0f1a767..8a4e8f0 100644
--- a/src/simulation/actions.js
+++ b/src/simulation/actions.js
@@ -78,8 +78,27 @@ const turn_right = {
 };
 
 
+const place = {
+  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];
+      return [
+        { lattice_changes: [{
+          x: agent.x + dx, y: agent.y + dy,
+          from: 'empty', to: 'mutable',
+          flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
+        }]}
+      ];
+    }
+  },
+};
+
+
 
 
 export const actions = [
-  move_forward, move_backward, turn_left, turn_right,
+  move_forward, move_backward, turn_left, turn_right, place,
 ];