ExtractMeanModeFromHomo1DFld.cpp File Reference

#include <SpatialDomains/MeshGraph.h>
#include <StdRegions/StdTriExp.h>
#include <cstdio>
#include <cstdlib>

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 43 of file ExtractMeanModeFromHomo1DFld.cpp.

{
    if (argc != 3)
    {
        fprintf(stderr,
                "Usage: ExtractmeanModeFromHomo1DFld fieldfile outfield\n");
        exit(1);
    }
 
    int i       = 0;
    int k       = 0;
    int n       = 0;
    int nz      = 0;
    int ncoeffs = 0;
 
    //----------------------------------------------
    // Import fieldfile.
    string fieldfile(argv[argc - 2]);
    vector<LibUtilities::FieldDefinitionsSharedPtr> fielddef;
    vector<vector<NekDouble>> fielddata;
    LibUtilities::Import(fieldfile, fielddef, fielddata);
    //----------------------------------------------
 
    vector<vector<NekDouble>> combineddata;
    vector<LibUtilities::FieldDefinitionsSharedPtr> newfielddef;
 
    //----------------------------------------------
    // put mean data consecutively
    for (i = 0; i < fielddata.size(); ++i)
    {
        ASSERTL0(fielddef[i]->m_numHomogeneousDir == 1,
                 "Expected fieldfile to have one homogeneous direction");
 
        if (fielddef[i]->m_homogeneousZIDs[0] != 0)
        {
            continue;
        }
        else
        {
            nz = fielddef[i]->m_homogeneousZIDs.size();
 
            fielddef[i]->m_numHomogeneousDir = 0;
            fielddef[i]->m_basis.resize(2);
            newfielddef.push_back(fielddef[i]);
 
            // Determine the number of coefficients per element
            switch (fielddef[i]->m_shapeType)
            {
                case LibUtilities::eTriangle:
                    ncoeffs = LibUtilities::StdTriData::getNumberOfCoefficients(
                        fielddef[i]->m_numModes[0], fielddef[i]->m_numModes[1]);
                    break;
                case LibUtilities::eQuadrilateral:
                    ncoeffs =
                        fielddef[i]->m_numModes[0] * fielddef[i]->m_numModes[1];
                    break;
                default:
                    ASSERTL0(false, "Shape not recognised");
                    break;
            }
 
            vector<NekDouble> newdata;
            auto vec_iter = fielddata[i].begin();
 
            for (k = 0; k < fielddef[i]->m_fields.size(); ++k)
            {
                // copy data from each field into consecutive order
                for (n = 0; n < fielddef[i]->m_elementIDs.size(); ++n)
                {
                    // put zero mode into newdata
                    newdata.insert(newdata.end(), vec_iter, vec_iter + ncoeffs);
                    vec_iter += nz * ncoeffs;
                }
            }
            combineddata.push_back(newdata);
        }
    }
    //----------------------------------------------
 
    //-----------------------------------------------
    // Write out datafile.
    LibUtilities::Write(argv[argc - 1], newfielddef, combineddata);
    //-----------------------------------------------
 
    return 0;
}

References ASSERTL0, Nektar::LibUtilities::eQuadrilateral, Nektar::LibUtilities::eTriangle, Nektar::LibUtilities::StdSegData::getNumberOfCoefficients(), Nektar::LibUtilities::Import(), and Nektar::LibUtilities::Write().