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/* *****************************************************************
    MESQUITE -- The Mesh Quality Improvement Toolkit

    Copyright 2006 Lawrence Livermore National Laboratory.  Under
    the terms of Contract B545069 with the University of Wisconsin --
    Madison, Lawrence Livermore National Laboratory retains certain
    rights in this software.

    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
    (lgpl.txt) along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    (2006) [email protected]

  ***************************************************************** */

/** \file TargetReader.hpp
 *  \brief
 *  \author Jason Kraftcheck
 */

#ifndef MSQ_TARGET_READER_HPP
#define MSQ_TARGET_READER_HPP

#include "Mesquite.hpp"
#include "TargetCalculator.hpp"
#include "ExtraDataUser.hpp"
#include "MeshInterface.hpp"

#include <vector>
#include <string>

namespace MBMesquite
{

class PatchData;
class MsqError;

/**\brief Internal structure used by TargetReader
 *
 * Store per-PatchData information.
 */
struct TargetReaderData
{
    std::vector< TagHandle > handles2D, handles3D;    //< tag handles, indexed by #tags/elem
    std::vector< MsqMatrix< 3, 3 > > targets3D;       //< cached values for last element
    std::vector< MsqMatrix< 2, 2 > > targets2D;       //< cached values for last element
    std::vector< MsqMatrix< 3, 2 > > targetsSurface;  //< cached values for last element
    size_t elementIndex;                              //< element for which values are cached.
};

/**\brief Read targets from tag data */
class TargetReader : public TargetCalculator, private ExtraDataUser< TargetReaderData >
{
  public:
    MESQUITE_EXPORT
    TargetReader( bool oriented_2D_targets, std::string tag_base_name = "MSQ_TARGET_MATRIX" );

    MESQUITE_EXPORT virtual ~TargetReader();

    MESQUITE_EXPORT virtual bool get_3D_target( PatchData& pd,<--- Function in derived class
                                                size_t element,
                                                Sample sample,
                                                MsqMatrix< 3, 3 >& W_out,
                                                MsqError& err );

    MESQUITE_EXPORT virtual bool get_2D_target( PatchData& pd,<--- Function in derived class
                                                size_t element,
                                                Sample sample,
                                                MsqMatrix< 2, 2 >& W_out,
                                                MsqError& err );

    MESQUITE_EXPORT virtual bool get_surface_target( PatchData& pd,<--- Function in derived class
                                                     size_t element,
                                                     Sample sample,
                                                     MsqMatrix< 3, 2 >& W_out,
                                                     MsqError& err );

    MESQUITE_EXPORT virtual bool have_surface_orient() const<--- Function in derived class
    {
        return orient2D;
    }

  private:
    virtual void notify_patch_destroyed( TargetReaderData& data );
    virtual void notify_new_patch( PatchData& pd, TargetReaderData& data );
    virtual void notify_sub_patch( PatchData& pd,
                                   TargetReaderData& data,
                                   PatchData& subpatch,
                                   const size_t* vert_map,
                                   const size_t* elem_map,
                                   MsqError& err );

    std::string tagBaseName;  //!< Base name for tags used to store targets
    bool orient2D;            //!< 2D targets included orientation (3x2 rather than 2x2)
};

}  // namespace MBMesquite

#endif