/**
		This is based on a nearest node criterion to all boundaries.

		@todo Improve efficiency. In most cases, we should be able to specify boundaries as planes
		@todo Somewhat dependent on the resolution of the model boundary
		*/
		bool OmegaBDistanceConfigurator::configure(Model& m) const
		{
			Point<3> ebc;
			m.UpdateIndices();
			vector<size_t> omega_ids;
			omega_ids.reserve(m.Region("Model").Elements());
			for (const auto& eit : m.Region("Model").ElementVector())
			{
				ebc = eit->BaryCenter();
				double dmin = numeric_limits<double>::max();
				for (Model::boundaryIterator bit = m.BoundariesBegin(); bit != m.BoundariesEnd(); ++bit)
				{
					if (!is_main_boundary_id(bit->first.second))
						continue;
					for (const auto& bnit : bit->second.NodeVector())
					{
						double const dist = ebc.DistanceTo(bnit->Coordinate());
						if (dist < dmin)
							dmin = dist;
					}
				}
				if (dmin >= dist_)
					omega_ids.push_back(eit->Idx());
			}
			if (omega_ids.size()) {
				m.FormRegionFrom("omega", omega_ids);
				return true;
			}
			return false;
		}
		bool OmegaCornerPointsConfigurator::configure(Model& m) const
		{		
			size_t i(0);
			Point<3> ebc;
			m.UpdateIndices();
			for (const auto& cpp : cpts_) {
				auto cmm = min_max(cpp);
				vector<size_t> omega_ids;
				omega_ids.reserve(m.Region("Model").Elements());
				for (const auto& eit : m.Region("Model").ElementVector())
				{
					ebc = eit->BaryCenter();
					if (!within_bounds(ebc, cmm))
						continue;						// not within min-max bounds
					omega_ids.push_back(eit->Idx());    // is within min-max bounds
				}
				auto rname = (string)"omega_" + to_string(i); ++i;
				if (omega_ids.size())
					m.FormRegionFrom(rname.c_str(), omega_ids);
			}
			return true;
		}