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

    Copyright 2004 Sandia Corporation and Argonne National
    Laboratory.  Under the terms of Contract DE-AC04-94AL85000
    with Sandia Corporation, the U.S. Government 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

    [email protected], [email protected], [email protected],
    [email protected], [email protected], [email protected]

  ***************************************************************** */
// -*- Mode : c++; tab-width: 3; c-tab-always-indent: t; indent-tabs-mode: nil; c-basic-offset: 3
// -*-
//
//   SUMMARY:
//     USAGE:
//
// ORIG-DATE: 19-Feb-02 at 10:57:52
//  LAST-MOD: 23-Jul-03 at 18:11:05 by Thomas Leurent
//
//
// DESCRIPTION:
// ============
/*! \file main.cpp

describe main.cpp here

 */
// DESCRIP-END.
//

#include "TestUtil.hpp"
#include "Mesquite.hpp"
#include "MeshImpl.hpp"
#include "PlanarDomain.hpp"
#include "InstructionQueue.hpp"
#include "TerminationCriterion.hpp"
#include "QualityAssessor.hpp"
#include "MsqError.hpp"
#include "ShapeImprovementWrapper.hpp"
// algorythms
#include "IdealWeightInverseMeanRatio.hpp"
#include "EdgeLengthQualityMetric.hpp"
#include "LPtoPTemplate.hpp"
#include "SteepestDescent.hpp"
#include "ConjugateGradient.hpp"

#include <iostream>
using std::cout;
using std::endl;
#include <cstdlib>

using namespace MBMesquite;

int main()
{
    MBMesquite::MeshImpl mesh;
    MsqPrintError err( cout );
    // create geometry: plane z=0, normal (0,0,1)
    Vector3D pnt( 0, 0, 0 );
    Vector3D s_norm( 0, 0, 1 );
    MBMesquite::PlanarDomain msq_geom( s_norm, pnt );

    std::string default_file_name = TestDir + "unittest/mesquite/2D/vtk/mixed/untangled/hybrid_3quad_1tri.vtk";
    mesh.read_vtk( default_file_name.c_str(), err );
    if( err ) return 1;

    // creates an intruction queue
    InstructionQueue queue1;

    // creates a mean ratio quality metric ...
    IdealWeightInverseMeanRatio mean_ratio( err );
    if( err ) return 1;
    //   mean_ratio->set_gradient_type(QualityMetric::NUMERICAL_GRADIENT);
    //   mean_ratio->set_hessian_type(QualityMetric::NUMERICAL_HESSIAN);
    // mean_ratio->set_averaging_method(QualityMetric::SUM, err);
    // MSQ_CHKERR(err);

    // ... and builds an objective function with it
    LPtoPTemplate obj_func( &mean_ratio, 2, err );
    if( err ) return 1;<--- If condition 'err' is true, the function will return/exit
    ;

    // creates the steepest descent, feas newt optimization procedures
    // ConjugateGradient* pass1 = new ConjugateGradient( &obj_func, err );
    SteepestDescent pass1( &obj_func );
    pass1.use_global_patch();
    if( err ) return 1;<--- Testing identical condition 'err'<--- Assuming that condition 'err' is not redundant
    ;

    QualityAssessor qa = QualityAssessor( &mean_ratio );
    if( err ) return 1;<--- Condition 'err' is always false
    ;

    // **************Set termination criterion****************
    TerminationCriterion tc_inner;
    tc_inner.add_iteration_limit( 1 );
    //_inner.add_absolute_quality_improvement( OF_value );
    // tc_inner.add_absolute_gradient_L2_norm( OF_value );
    TerminationCriterion tc_outer;
    // tc_outer.add_iteration_limit( 1 );
    tc_outer.add_iteration_limit( 1 );

    pass1.set_inner_termination_criterion( &tc_inner );
    pass1.set_outer_termination_criterion( &tc_outer );

    queue1.add_quality_assessor( &qa, err );
    if( err ) return 1;
    // adds 1 pass of pass1 to mesh_set1
    queue1.set_master_quality_improver( &pass1, err );
    if( err ) return 1;
    queue1.add_quality_assessor( &qa, err );
    if( err ) return 1;
    mesh.write_vtk( "original_mesh.vtk", err );
    if( err ) return 1;

    MeshDomainAssoc mesh_and_domain = MeshDomainAssoc( &mesh, &msq_geom );
    queue1.run_instructions( &mesh_and_domain, err );
    if( err ) return 1;
    mesh.write_vtk( "smoothed_mesh.vtk", err );
    if( err ) return 1;
    // std::cout<<"\n\nNow running the shape wrapper.\n=n";
    // ShapeImprovementWrapper wrap(100);
    // wrap.run_instructions(mesh_set1, err); MSQ_CHKERR(err);
    print_timing_diagnostics( cout );
    return 0;
}