var rendering = false;
   var waiting_for_data = true;
   var data_update = false;

  socket.on('update', function(data){

      if(rendering)console.log("rendering");

      data_update = true;
      game_data = data;
      data_update = false;

      if(waiting_for_data){
        waiting_for_data = false;
        render();
      }


    });

    window.requestAnimFrame = (function(){
          return  window.requestAnimationFrame       ||
                  window.webkitRequestAnimationFrame ||
                  window.mozRequestAnimationFrame    ||
                  window.oRequestAnimationFrame      ||
                  window.msRequestAnimationFrame     ||
                  function(/* function */ callback, /* DOMElement */ element){
                    window.setTimeout(callback, 1000 / 60);
                  };
    })();


    function render(){


      while(data_update){
        console.log("waiting" + data_update);
      }

      if(game_data == null )console.log(game_data);

      rendering = true;
        //mapa.draw(context, game_data.player_position);
        renderer.draw(game_data);
      rendering = false;

      window.requestAnimFrame(render);
    }

  }