void OnMouseOver()
 {
     if (Input.GetMouseButtonDown(1))
     {
         Vector3 pos = new Vector3((int)this.transform.position.x, 1, (int)this.transform.position.z);
         main.destino = pos;
     }
     if (Input.GetMouseButtonDown(2))
     {
         Vector3 pos = new Vector3((int)this.transform.position.x, 1, (int)this.transform.position.z);
         print("Cambiamos caminable del cubo en: " + pos);
         main.CambioCaminable(pos);
     }
 }