AddModeTo2DFld.cpp

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#include <SpatialDomains/MeshGraph.h> // for FieldDefinitions, etc
#include <StdRegions/StdTriExp.h>
#include <cstdio>
#include <cstdlib>
 
using namespace std;
using namespace Nektar;
 
int main(int argc, char *argv[])
{
    NekDouble scal1, scal2;
 
    if (argc != 6)
    {
        fprintf(
            stderr,
            "Usage: AddModeTo2DFld scal1 scal2 2Dfieldfile1 fieldfile2 "
            "outfield\n"
            "\t produces scal1*2Dfieldfiel1 + scal2*fieldfile2 in outfield\n");
        exit(1);
    }
 
    scal1 = boost::lexical_cast<double>(argv[argc - 5]);
    scal2 = boost::lexical_cast<double>(argv[argc - 4]);
 
    //----------------------------------------------
    // Import fieldfile1.
    string fieldfile1(argv[argc - 3]);
    vector<LibUtilities::FieldDefinitionsSharedPtr> fielddef1;
    vector<vector<NekDouble>> fielddata1;
    LibUtilities::Import(fieldfile1, fielddef1, fielddata1);
    //----------------------------------------------
 
    //----------------------------------------------
    // Import fieldfile2.
    string fieldfile2(argv[argc - 2]);
    vector<LibUtilities::FieldDefinitionsSharedPtr> fielddef2;
    vector<vector<NekDouble>> fielddata2;
    LibUtilities::Import(fieldfile2, fielddef2, fielddata2);
    //----------------------------------------------
 
    vector<vector<NekDouble>> combineddata;
 
    ASSERTL0(fielddata1.size() == fielddata2.size(),
             "Inner has different size");
    //----------------------------------------------
    // Add fielddata2 to fielddata1 using m_fields definition to align data.
 
    int i = 0;
    int j = 0;
    int k = 0;
    int n = 0;
 
    for (i = 0; i < fielddata2.size(); ++i)
    {
        ASSERTL0(fielddef2[i]->m_numHomogeneousDir == 1,
                 "Expected second fld to have one homogeneous direction");
        ASSERTL0(fielddef2[i]->m_numModes[2] == 2,
                 "Expected Fourier field to have 2 modes");
 
        int datalen1 = fielddata1[i].size() / fielddef1[i]->m_fields.size();
        int datalen2 = fielddata2[i].size() / fielddef2[i]->m_fields.size();
 
        ASSERTL0(datalen1 * 2 == datalen2,
                 "Data per fields is note compatible");
 
        // Determine the number of coefficients per element
        int ncoeffs = 0;
        switch (fielddef2[i]->m_shapeType)
        {
            case LibUtilities::eTriangle:
                ncoeffs = LibUtilities::StdTriData::getNumberOfCoefficients(
                    fielddef2[i]->m_numModes[0], fielddef2[i]->m_numModes[1]);
                break;
            case LibUtilities::eQuadrilateral:
                ncoeffs =
                    fielddef2[i]->m_numModes[0] * fielddef2[i]->m_numModes[1];
                break;
            default:
                ASSERTL0(false, "Shape not recognised");
                break;
        }
 
        // array for zero packing
        Array<OneD, NekDouble> Zero(ncoeffs, 0.0);
 
        // scale first and second fields
        Vmath::Smul(fielddata1[i].size(), scal1, &fielddata1[i][0], 1,
                    &fielddata1[i][0], 1);
        Vmath::Smul(fielddata2[i].size(), scal2, &fielddata2[i][0], 1,
                    &fielddata2[i][0], 1);
 
        vector<NekDouble> newdata;
        auto vec_iter = fielddata2[i].begin();
 
        for (k = 0; k < fielddef2[i]->m_fields.size(); ++k)
        {
            // get location of 2D field information in order of field2 ordering
            int offset = 0;
            for (j = 0; j < fielddef1[i]->m_fields.size(); ++j)
            {
                if (fielddef1[i]->m_fields[j] == fielddef2[i]->m_fields[k])
                {
                    break;
                }
                offset += datalen1;
            }
 
            if (j != fielddef1[i]->m_fields.size())
            {
                for (n = 0; n < fielddef2[i]->m_elementIDs.size(); ++n)
                {
                    // Real zero component
                    newdata.insert(
                        newdata.end(), &(fielddata1[i][offset + n * ncoeffs]),
                        &(fielddata1[i][offset + n * ncoeffs]) + ncoeffs);
 
                    // Imaginary zero component;
                    newdata.insert(newdata.end(), &Zero[0], &Zero[0] + ncoeffs);
 
                    // Put orginal mode in here.
                    newdata.insert(newdata.end(), vec_iter,
                                   vec_iter + 2 * ncoeffs);
                    vec_iter += 2 * ncoeffs;
                }
            }
            else
            {
 
                for (n = 0; n < fielddef2[i]->m_elementIDs.size(); ++n)
                {
                    // Real & Imag zero component
                    newdata.insert(newdata.end(), &Zero[0], &Zero[0] + ncoeffs);
                    newdata.insert(newdata.end(), &Zero[0], &Zero[0] + ncoeffs);
 
                    // Put orginal mode in here.
                    newdata.insert(newdata.end(), vec_iter,
                                   vec_iter + 2 * ncoeffs);
                    vec_iter += 2 * ncoeffs;
                }
            }
        }
        combineddata.push_back(newdata);
        fielddef2[i]->m_numModes[2] += 2;
        fielddef2[i]->m_homogeneousZIDs.push_back(2);
        fielddef2[i]->m_homogeneousZIDs.push_back(3);
 
        // check to see if any field in fielddef1[i]->m_fields is
        // not defined in fielddef2[i]->m_fields
        for (k = 0; k < fielddef1[i]->m_fields.size(); ++k)
        {
            for (j = 0; j < fielddef2[i]->m_fields.size(); ++j)
            {
                if (fielddef1[i]->m_fields[k] == fielddef2[i]->m_fields[j])
                {
                    break;
                }
            }
 
            if (j == fielddef2[i]->m_fields.size())
            {
                cout << "Warning: Field \'" << fielddef1[i]->m_fields[k]
                     << "\' was not included in output " << endl;
            }
        }
    }
    //----------------------------------------------
 
    //-----------------------------------------------
    // Write out datafile.
    LibUtilities::Write(argv[argc - 1], fielddef2, combineddata);
    //-----------------------------------------------
 
    return 0;
}