filter_base.h

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/*
 * MAST: Multidisciplinary-design Adaptation and Sensitivity Toolkit
 * Copyright (C) 2013-2020  Manav Bhatia and MAST authors
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */


#ifndef __mast__filter_base_h__
#define __mast__filter_base_h__


// MAST includes
#include "base/mast_data_types.h"

// libMesh includes
#include "libmesh/system.h"
#include "libmesh/node.h"
#include "libmesh/elem.h"


namespace MAST {
    
    class FilterBase {
    
    public:
        
        FilterBase(libMesh::System& sys,
                   const Real radius,
                   const std::set<unsigned int>& dv_dof_ids);
        
        
        virtual ~FilterBase();
        
        void compute_filtered_values(const libMesh::NumericVector<Real>& input,
                                     libMesh::NumericVector<Real>& output,
                                     bool close_vector = true) const;

        void compute_filtered_values(std::map<unsigned int, Real>& nonzero_vals,
                                     libMesh::NumericVector<Real>& output,
                                     bool close_vector) const;
        
        void compute_filtered_values(const std::vector<Real>& input,
                                     std::vector<Real>& output) const;

        bool if_elem_in_domain_of_influence(const libMesh::Elem& elem,
                                            const libMesh::Node& level_set_node) const;
        

        
        virtual void print(std::ostream& o) const;
        
        
    protected:
        
        void _init();
        void _init2();
        
        libMesh::System& _level_set_system;
        
        Real _radius;
        
        
        Real _level_set_fe_size;
        
        const std::set<unsigned int>&   _dv_dof_ids;

        std::map<unsigned int, std::vector<std::pair<unsigned int, Real>>> _filter_map;
    };
    
    
}


#endif // __mast__filter_base_h__