MOAB: Mesh Oriented datABase  (version 5.2.1)
TrustRegion.hpp
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00001 /* *****************************************************************
00002     MESQUITE -- The Mesh Quality Improvement Toolkit
00003 
00004     Copyright 2007 Sandia National Laboratories.  Developed at the
00005     University of Wisconsin--Madison under SNL contract number
00006     624796.  The U.S. Government and the University of Wisconsin
00007     retain certain rights to this software.
00008 
00009     This library is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU Lesser General Public
00011     License as published by the Free Software Foundation; either
00012     version 2.1 of the License, or (at your option) any later version.
00013 
00014     This library is distributed in the hope that it will be useful,
00015     but WITHOUT ANY WARRANTY; without even the implied warranty of
00016     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017     Lesser General Public License for more details.
00018 
00019     You should have received a copy of the GNU Lesser General Public License
00020     (lgpl.txt) along with this library; if not, write to the Free Software
00021     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 
00023     (2008) kraftche@cae.wisc.edu
00024 
00025   ***************************************************************** */
00026 
00027 /** \file TrustRegion.hpp
00028  *  \brief Port Todd Munson's trust region solver to Mesquite
00029  *  \author Jason Kraftcheck
00030  */
00031 
00032 #ifndef MSQ_TRUST_REGION_HPP
00033 #define MSQ_TRUST_REGION_HPP
00034 
00035 #include "Mesquite.hpp"
00036 #include "VertexMover.hpp"
00037 #include "PatchSetUser.hpp"
00038 #include "MsqHessian.hpp"
00039 
00040 namespace MBMesquite
00041 {
00042 
00043 class PatchDataVerticesMemento;
00044 
00045 class TrustRegion : public VertexMover, public PatchSetUser
00046 {
00047   public:
00048     MESQUITE_EXPORT TrustRegion( ObjectiveFunction* of );
00049 
00050     MESQUITE_EXPORT virtual ~TrustRegion();
00051 
00052     PatchSet* get_patch_set();
00053 
00054     MESQUITE_EXPORT std::string get_name() const;
00055 
00056   protected:
00057     virtual void initialize( PatchData& pd, MsqError& err );
00058     virtual void optimize_vertex_positions( PatchData& pd, MsqError& err );
00059     virtual void initialize_mesh_iteration( PatchData& pd, MsqError& err );
00060     virtual void terminate_mesh_iteration( PatchData& pd, MsqError& err );
00061     virtual void cleanup();
00062 
00063   private:
00064     void compute_preconditioner( MsqError& err );
00065     void apply_preconditioner( Vector3D* z, Vector3D* r, MsqError& err );
00066 
00067     PatchDataVerticesMemento* mMemento;
00068     MsqHessian mHess;
00069     std::vector< Vector3D > mGrad;
00070     std::vector< Vector3D > wVect, zVect, dVect, pVect, rVect;
00071     std::vector< double > preCond;
00072 };
00073 
00074 }  // namespace MBMesquite
00075 
00076 #endif
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