Added control panel

src/Engine.js

@@ -1,19 +1,26 @@
 const Environment = require('./Environment');
+const ControlPanel = require('./ControlPanel');
 
 class Engine{
     constructor(){
         this.fps = 0;
         this.environment = new Environment(5);
+        this.controlpanel = new ControlPanel(this);
         this.environment.OriginOfLife();
         this.last_update = Date.now();
         this.delta_time = 0;
+        this.actual_fps = 0;
         this.running = false;
     }
 
     start(fps=60) {
+        if (fps <= 0)
+            fps = 1;
+        if (fps > 500)
+            fps = 500;
         this.fps = fps;
         this.game_loop = setInterval(function(){this.update();}.bind(this), 1000/fps);
-        this.runnning = true;
+        this.running = true;
     }
     
     stop() {
@@ -27,6 +34,7 @@ class Engine{
         this.last_update = Date.now();
         this.environment.update(this.delta_time);
         this.environment.render();
+        this.actual_fps = 1/this.delta_time*1000;
     }
 
 }