Added auto food generation

dist/index.html

@@ -189,6 +189,9 @@
 						<br>
 						<label for="look-range" title='How far an eye cell can see (in number of cells)'>Look range:</label>
 						<input type="number" id="look-range" min="1" max="50" value=20 step="1">
+						<br>
+						<label for="food-drop-rate" title='Rate at which food is automatically generated and dropped in the world'>Auto food drop rate:</label>
+						<input type="number" id="food-drop-rate" value=0 max="1000">
 						
 					</div>
 					<div class='right-half'>

src/Controllers/ControlPanel.js

@@ -106,6 +106,9 @@ class ControlPanel {
         $('#look-range').change(function() {
             Hyperparams.lookRange = $('#look-range').val();
         });
+        $('#food-drop-rate').change(function() {
+            Hyperparams.foodDropProb = $('#food-drop-rate').val();
+        });
 
         $('#evolved-mutation').change( function() {
             if (this.checked) {

src/Environments/WorldEnvironment.js

@@ -4,6 +4,8 @@ const GridMap = require('../Grid/GridMap');
 const Organism = require('../Organism/Organism');
 const CellStates = require('../Organism/Cell/CellStates');
 const EnvironmentController = require('../Controllers/EnvironmentController');
+const Hyperparams = require('../Hyperparameters.js');
+const Cell = require('../Organism/Cell/GridCell');
 
 class WorldEnvironment extends Environment{
     constructor(cell_size) {
@@ -29,6 +31,9 @@ class WorldEnvironment extends Environment{
                 to_remove.push(i);
             }
         }
+        if (Hyperparams.foodDropProb > 0) {
+            this.generateFood();
+        }
         this.removeOrganisms(to_remove);
     }
 
@@ -94,6 +99,21 @@ class WorldEnvironment extends Environment{
         this.organisms = [];
     }
 
+    generateFood() {
+        var num_food = Math.max(Math.floor(this.grid_map.cols*this.grid_map.rows*Hyperparams.foodDropProb/50000), 1)
+        var prob = Hyperparams.foodDropProb;
+        for (var i=0; i<num_food; i++) {
+            if (Math.random() <= prob){
+                var c=Math.floor(Math.random() * this.grid_map.cols);
+                var r=Math.floor(Math.random() * this.grid_map.rows);
+
+                if (this.grid_map.cellAt(c, r).state == CellStates.empty){
+                    this.changeCell(c, r, CellStates.food, null);
+                }
+            }
+        }
+    }
+
     reset(clear_walls=true) {
         this.organisms = [];
         this.grid_map.fillGrid(CellStates.empty);

src/Hyperparameters.js

@@ -24,6 +24,8 @@ const Hyperparams = {
         this.instaKill = false;
 
         this.lookRange = 20;
+
+        this.foodDropProb = 0;
     },
 
     balanceMutationProbs : function(choice) {