void m_grid_OnBlockAdded(Entities.Cube.MySlimBlock obj)
        {
            var turret = obj.FatBlock as MyLargeTurretBase;

            if (turret != null)
            {
                if (m_turrets.Count == 0)
                {
                    m_queryLocal = new BoundingSphere(obj.FatBlock.PositionComp.LocalMatrix.Translation, turret.ShootingRange);
                }
                else
                {
                    m_queryLocal.Include(new BoundingSphere(obj.FatBlock.PositionComp.LocalMatrix.Translation, turret.ShootingRange));
                }
                m_turrets.Add(turret);
            }
        }
        void Grid_OnBlockRemoved(Entities.Cube.MySlimBlock slimBlock)
        {
            var planet = GetPlanet(slimBlock.WorldPosition);

            if (planet != null)
            {
                List <MyNavmeshManager> managers;
                if (m_planetManagers.TryGetValue(planet, out managers))
                {
                    var bb = slimBlock.WorldAABB;
                    foreach (var manager in managers)
                    {
                        manager.InvalidateArea(bb);
                    }
                }
            }
        }