kinematic_coupling_constraint.h

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/*
 * MAST: Multidisciplinary-design Adaptation and Sensitivity Toolkit
 * Copyright (C) 2013-2019  Manav Bhatia
 *
 * 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__kinematic_coupling_constraint_h__
#define __mast__kinematic_coupling_constraint_h__

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

// libMesh includes
#include "libmesh/node.h"
#include "libmesh/dof_map.h"


namespace MAST {

    // Forward declerations
    class SystemInitialization;

    class KinematicCouplingConstraint {
      
    public:
        
        KinematicCouplingConstraint(MAST::SystemInitialization& sys_init,
                                    const libMesh::Node& slave_node,
                                    const std::set<const libMesh::Node*>& master_nodes,
                                    bool constrain_rotations);
        
        virtual ~KinematicCouplingConstraint();

        unsigned int
        n_constrain_nodes() const {
            
            return _constrain_rotations?6:3;
        }

        void
        get_dof_constraint_row(std::vector<std::tuple
                               <libMesh::dof_id_type,
                               libMesh::DofConstraintRow,
                               Real>>& constraints) const;
        
    protected:
        
        MAST::SystemInitialization&    _sys_init;
        const libMesh::Node*           _slave;
        std::set<const libMesh::Node*> _masters;
        bool                           _constrain_rotations;
    };
}

#endif // __mast__kinematic_coupling_constraint_h__