working eyes!

src/Organism/Perception/Brain.js

@@ -0,0 +1,63 @@
+const CellTypes = require("../Cell/CellTypes");
+const Hyperparams = require("../../Hyperparameters");
+const Directions = require("../Directions");
+
+const Decision = {
+    neutral: 0,
+    retreat: 1,
+    chase: 2
+}
+
+class Brain {
+    constructor(owner){
+        this.owner = owner;
+        this.observations = [];
+
+        // corresponds to CellTypes
+        this.decisions = [
+            Decision.neutral, // empty
+            Decision.chase, // food
+            Decision.neutral, // wall
+            Decision.neutral, // mouth
+            Decision.neutral, // producer
+            Decision.neutral, // mover
+            Decision.retreat, // killer
+            Decision.neutral, // armor
+            Decision.neutral, // eye
+        ];
+    }
+
+    observe(observation){
+        this.observations.push(observation);
+    }
+
+    decide(){
+        var decision = Decision.neutral;
+        var closest = Hyperparams.lookRange + 1;
+        var move_direction = 0;
+        for (var obs of this.observations) {
+            if (obs.cell == null || obs.cell.owner == this.owner){
+                continue;
+            }
+            if (obs.distance < closest){
+                decision = this.decisions[obs.cell.type];
+                move_direction = obs.direction;
+                closest = obs.distance;
+            }
+        }
+        this.observations = [];
+        if (decision == Decision.chase) {
+            this.owner.direction = move_direction;
+            this.owner.move_count = 0;
+            return true;
+        }
+        else if (decision == Decision.retreat) {
+            this.owner.direction = Directions.getOppositeDirection(move_direction);
+            this.owner.move_count = 0;
+            return true;
+        }
+        return false;
+    }
+}
+
+module.exports = Brain;