InputFld.cpp

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////////////////////////////////////////////////////////////////////////////////
//
//  File: InputFld.cpp
//
//  For more information, please see: http://www.nektar.info/
//
//  The MIT License
//
//  Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
//  Department of Aeronautics, Imperial College London (UK), and Scientific
//  Computing and Imaging Institute, University of Utah (USA).
//
//  License for the specific language governing rights and limitations under
//  Permission is hereby granted, free of charge, to any person obtaining a
//  copy of this software and associated documentation files (the "Software"),
//  to deal in the Software without restriction, including without limitation
//  the rights to use, copy, modify, merge, publish, distribute, sublicense,
//  and/or sell copies of the Software, and to permit persons to whom the
//  Software is furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included
//  in all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
//  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
//  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
//  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
//  DEALINGS IN THE SOFTWARE.
//
//  Description: GMSH converter.
//
////////////////////////////////////////////////////////////////////////////////

#include <string>
#include <iostream>
using namespace std;

#include "InputFld.h"


static std::string npts = LibUtilities::SessionReader::RegisterCmdLineArgument(
                "NumberOfPoints","n","Define number of points to dump output");

namespace Nektar
{
    namespace Utilities
    {
        ModuleKey InputFld::m_className[5] = {
            GetModuleFactory().RegisterCreatorFunction(
                ModuleKey(eInputModule, "fld"), InputFld::create,
                "Reads Fld file."),
            GetModuleFactory().RegisterCreatorFunction(
                ModuleKey(eInputModule, "chk"), InputFld::create,
                "Reads Fld file."),
            GetModuleFactory().RegisterCreatorFunction(
                ModuleKey(eInputModule, "rst"), InputFld::create,
                "Reads Fld file."),
        };
        
        /**
         * @brief Set up InputFld object.
         *
         */
        InputFld::InputFld(FieldSharedPtr f) : InputModule(f)
        {
            m_allowedFiles.insert("fld");
            m_allowedFiles.insert("chk");
            m_allowedFiles.insert("rst");
        }

        InputFld::~InputFld()
        {
        }

        /**
         *
         */
        void InputFld::Process(po::variables_map &vm)
        {
            if(m_f->m_verbose)
            {
                cout << "Processing input fld file" << endl;
            }

            int i;
            string fldending;
            //Determine appropriate field input 
            if(m_f->m_inputfiles.count("fld") != 0)
            {
                fldending = "fld";
            }
            else if(m_f->m_inputfiles.count("chk") != 0)
            {
                fldending = "chk";
            }
            else if (m_f->m_inputfiles.count("rst") != 0)
            {
                fldending = "rst";
            }
            else
            {
                ASSERTL0(false,"no input file found");
            }
            
            if(!m_f->m_fld) 
            {
                if(m_f->m_session)
                {
                    m_f->m_fld = MemoryManager<LibUtilities::FieldIO>
                        ::AllocateSharedPtr(m_f->m_session->GetComm());
                }
                else // serial communicator
                {
                    LibUtilities::CommSharedPtr c = LibUtilities::GetCommFactory().CreateInstance("Serial", 0, 0);
                    m_f->m_fld = MemoryManager<LibUtilities::FieldIO>
                        ::AllocateSharedPtr(c);
                }
            }
            

            if(m_f->m_graph)  // all for restricted expansion defintion when loading field
            {
                // currently load all field (possibly could read data from expansion list
                // but it is re-arranged in expansion) 
            
                const SpatialDomains::ExpansionMap &expansions = m_f->m_graph->GetExpansions();
                
                // if Range has been speficied it is possible to have a
                // partition which is empty so ccheck this and return if
                // no elements present.
                if(!expansions.size())
                {
                    return;
                }
                
                m_f->m_exp.resize(1);
                
                Array<OneD,int> ElementGIDs(expansions.size());
                SpatialDomains::ExpansionMap::const_iterator expIt;
                
                i = 0;
                for (expIt = expansions.begin(); expIt != expansions.end(); ++expIt)
                {
                    ElementGIDs[i++] = expIt->second->m_geomShPtr->GetGlobalID();
                }
                
                m_f->m_fielddef.clear();
                m_f->m_data.clear();

                m_f->m_fld->Import(m_f->m_inputfiles[fldending][0],m_f->m_fielddef,m_f->m_data,
                                   LibUtilities::NullFieldMetaDataMap,
                                   ElementGIDs);
            }
            else // load all data. 
            {
                m_f->m_fld->Import(m_f->m_inputfiles[fldending][0],m_f->m_fielddef,m_f->m_data);
            }


            // if m_exp defined presume we want to load all field  into expansions
            if(m_f->m_exp.size()) 
            {
                int nfields;
                if(vm.count("useSessionVariables"))
                {
                    nfields = m_f->m_session->GetVariables().size();
                }
                else
                {
                    nfields = m_f->m_fielddef[0]->m_fields.size();
                }
                m_f->m_exp.resize(nfields);
                
                vector<string> vars = m_f->m_session->GetVariables();
                
                // declare other fields; 
                for (int i = 1; i < nfields; ++i)
                {
                    if(i < vars.size())
                    {
                        m_f->m_exp[i] = m_f->AppendExpList(m_f->m_fielddef[0]->m_numHomogeneousDir,
                                                           vars[i]);
                    }
                    else
                    {
                        if(vars.size())
                        {
                            m_f->m_exp[i] = m_f->AppendExpList(m_f->m_fielddef[0]->m_numHomogeneousDir,vars[0]);
                        }
                        else
                        {
                            m_f->m_exp[i] = m_f->AppendExpList(m_f->m_fielddef[0]->m_numHomogeneousDir);
                        }
                    }                   
                }
                
                for (int j = 0; j < nfields; ++j)
                {
                    for (int i = 0; i < m_f->m_data.size(); ++i)
                    {
                        m_f->m_exp[j]->ExtractDataToCoeffs(m_f->m_fielddef[i], 
                                                           m_f->m_data[i],
                                                           m_f->m_fielddef[i]->m_fields[j],
                                                           m_f->m_exp[j]->UpdateCoeffs());
                    }
                    m_f->m_exp[j]->BwdTrans(m_f->m_exp[j]->GetCoeffs(), 
                                            m_f->m_exp[j]->UpdatePhys());
                }
                
                // if range is defined reset up output field in case or
                // reducing fld definition
                if(vm.count("range"))
                {
                    std::vector<LibUtilities::FieldDefinitionsSharedPtr> FieldDef
                        = m_f->m_exp[0]->GetFieldDefinitions();
                    std::vector<std::vector<NekDouble> > FieldData(FieldDef.size());
                    
                    for (int j = 0; j < nfields; ++j)
                    {
                        for (i = 0; i < FieldDef.size(); ++i)
                        {   
                            FieldDef[i]->m_fields.push_back(m_f->m_fielddef[0]->m_fields[j]);
                            m_f->m_exp[j]->AppendFieldData(FieldDef[i], FieldData[i]);
                        }
                    }   
                    m_f->m_fielddef = FieldDef;
                    m_f->m_data     = FieldData;
                }
            }
        }
    }
}