working eyes!

src/Organism/Cell/LocalCell.js

@@ -1,7 +1,7 @@
 const CellTypes = require("./CellTypes");
 const Directions = require("../Directions");
 const Hyperparams = require("../../Hyperparameters");
-const Eye = require("../Eye.js");
+const Eye = require("../Perception/Eye.js");
 
 // A local cell is a lightweight container for a cell in an organism. It does not directly exist in the grid 
 class LocalCell{

src/Organism/Directions.js

@@ -3,12 +3,24 @@ const Directions = {
     right:1,
     down:2,
     left:3,
-    scalars:[[0,-1],[0,1],[-1,0],[1,0]],
+    scalars:[[0,-1],[1,0],[0,1],[-1,0]],
     getRandomDirection: function() {
         return Math.floor(Math.random() * 4);
     },
     getRandomScalar: function() {
         return this.scalars[Math.floor(Math.random() * this.scalars.length)];
+    },
+    getOppositeDirection: function(dir) {
+        switch(dir){
+            case this.up:
+                return this.down;
+            case this.down:
+                return this.up;
+            case this.left:
+                return this.right;
+            case this.right:
+                return this.left;
+        }
     }
 }
 

src/Organism/Eye.js

@@ -1,20 +0,0 @@
-const Directions = require("./Directions");
-
-class Eye {
-    constructor(loc_cell, direction=-1) {
-        this.direction = direction;
-        if (direction == -1){
-            this.direction = Directions.getRandomDirection();
-        }
-        this.loc_cell = loc_cell
-    }
-
-    getAbsoluteDirection(parent_dir) {
-        var dir = parent_dir + this.direction;
-        if (dir > 3)
-            dir -= 4;
-        return dir;
-    }
-}
-
-module.exports = Eye;

src/Organism/Organism.js

@@ -5,7 +5,8 @@ const LocalCell = require("./Cell/LocalCell");
 const Neighbors = require("../Grid/Neighbors");
 const Hyperparams = require("../Hyperparameters");
 const Directions = require("./Directions");
-const Eye = require("./Eye");
+const Eye = require("./Perception/Eye");
+const Brain = require("./Perception/Brain");
 
 const directions = [[0,1],[0,-1],[1,0],[-1,0]]
 
@@ -20,7 +21,7 @@ class Organism {
         this.cells = [];
         this.is_producer = false;
         this.is_mover = false;
-        this.direction = Directions.up;
+        this.direction = Directions.down;
         this.rotation = Directions.up;
         this.can_rotate = Hyperparams.moversCanRotate;
         this.move_count = 0;
@@ -28,6 +29,7 @@ class Organism {
         this.mutability = 5;
         this.damage = 0;
         this.birth_distance = 4;
+        this.brain = new Brain(this);
         if (parent != null) {
             this.inherit(parent);
         }
@@ -334,18 +336,23 @@ class Organism {
             this.reproduce();
         }
         for (var cell of this.cells) {
-            this.getRealCell(cell).performFunction(this.env);
-            if (!this.living){
-                return this.living
+            if (cell.type == CellTypes.eye){
+                var obs = cell.eye.look(this.getRealCol(cell), this.getRealRow(cell), this.rotation, this.env);
+                this.brain.observe(obs);
             }
-            if (cell.type == CellTypes.eye && cell.eye == null){
-                console.log("whoe nellie");
+            else {
+                this.getRealCell(cell).performFunction(this.env);
+                if (!this.living){
+                    return this.living
+                }
             }
         }
+        
         if (this.is_mover) {
             this.move_count++;
+            var changed_dir = this.brain.decide();
             var moved = this.attemptMove();
-            if (this.move_count > this.move_range){
+            if ((this.move_count > this.move_range && !changed_dir) || !moved){
                 this.attemptRotate();
             }
         }
@@ -359,6 +366,13 @@ class Organism {
         return this.env.grid_map.cellAt(real_c, real_r);
     }
 
+    getRealCol(local_cell) {
+        return this.c + local_cell.rotatedCol(this.rotation);
+    }
+    getRealRow(local_cell) {
+        return this.r + local_cell.rotatedRow(this.rotation);
+    }
+
 }
 
 module.exports = Organism;

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;

src/Organism/Perception/Eye.js

@@ -0,0 +1,59 @@
+const Directions = require("../Directions");
+const Hyperparams = require("../../Hyperparameters");
+const CellTypes = require("../Cell/CellTypes");
+const Observation = require("./Observation")
+
+class Eye {
+    constructor(loc_cell, direction=-1) {
+        this.direction = direction;
+        if (direction == -1){
+            this.direction = Directions.getRandomDirection();
+        }
+        this.loc_cell = loc_cell
+    }
+
+    getAbsoluteDirection(parent_dir) {
+        var dir = parent_dir + this.direction;
+        if (dir > 3)
+            dir -= 4;
+        return dir;
+    }
+
+    look(start_col, start_row, rotation, env) {
+        var direction = this.getAbsoluteDirection(rotation);
+        var addCol = 0;
+        var addRow = 0;
+        switch(direction) {
+            case Directions.up:
+                addRow = -1;
+                break;
+            case Directions.down:
+                addRow = 1;
+                break;
+            case Directions.right:
+                addCol = 1;
+                break;
+            case Directions.left:
+                addCol = -1;
+                break;
+        }
+        var col=start_col;
+        var row=start_row;
+        var cell = null;
+        for (var i=0; i<Hyperparams.lookRange; i++){
+            col+=addCol;
+            row+=addRow;
+            cell = env.grid_map.cellAt(col, row);
+            if (cell == null){
+                break;
+            }
+            if (cell.type != CellTypes.empty){
+                var distance = Math.abs(start_col-col) + Math.abs(start_row-row);
+                return new Observation(cell, distance, direction);
+            }
+        }
+        return new Observation(cell, Hyperparams.lookRange, direction);
+    }
+}
+
+module.exports = Eye;

src/Organism/Perception/Observation.js

@@ -0,0 +1,9 @@
+class Observation {
+    constructor(cell, distance, direction){
+        this.cell = cell;
+        this.distance = distance;
+        this.direction = direction;
+    }
+}
+
+module.exports = Observation;