FemlabMeshReader.cpp

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*/

#include "FemlabMeshReader.hpp"
#include "Exception.hpp"

#include <sstream>

// Implementation

template <unsigned ELEMENT_DIM, unsigned SPACE_DIM>
FemlabMeshReader<ELEMENT_DIM, SPACE_DIM>::FemlabMeshReader(const std::string& rPathBaseName,
                                                           const std::string& rNodeFileName,
                                                           const std::string& rElementFileName,
                                                           const std::string& rEdgeFileName)
{

    // Open node file and store the lines as a vector of strings (minus the comments)
    std::string node_file_name = rPathBaseName + rNodeFileName;
    this->mNodeRawData = this->GetRawDataFromFile(node_file_name);

    // Read the node data using TokenizeStringsToDoubles method
    this->mNodeData = TokenizeStringsToDoubles(this->mNodeRawData);

    // Initialise iterator for public GetNextNode method
    this->mpNodeIterator = this->mNodeData.begin();


    // Open element file and store the lines as a vector of strings (minus the comments)
    std::string element_file_name = rPathBaseName + rElementFileName;
    this->mElementRawData = this->GetRawDataFromFile(element_file_name);

    // Read the rest of the element data using TokenizeStringsToInts method
    this->mElementData = TokenizeStringsToInts(this->mElementRawData, SPACE_DIM + 1);
    this->mpElementIterator = this->mElementData.begin();

    /*
     * Open edge file and store the lines as a vector of strings (minus the comments)
     * We store edges as "faces" but the superclass
     * provides a GetNextEdgeData method which queries this data.
     */

    std::string edge_file_name = rPathBaseName + rEdgeFileName;
    this->mFaceRawData = this->GetRawDataFromFile(edge_file_name);

    // Read the rest of the face/edge data using TokenizeStringsToInts method
    this->mFaceData = TokenizeStringsToInts(this->mFaceRawData, SPACE_DIM);
    this->mpFaceIterator = this->mFaceData.begin();
}

template <unsigned ELEMENT_DIM, unsigned SPACE_DIM>
FemlabMeshReader<ELEMENT_DIM, SPACE_DIM>::~FemlabMeshReader()
{}

template <unsigned ELEMENT_DIM, unsigned SPACE_DIM>
std::vector < std::vector<double> >
    FemlabMeshReader<ELEMENT_DIM, SPACE_DIM>::TokenizeStringsToDoubles(const std::vector<std::string>& rRawData)
{
    std::vector < std::vector < double > >tokenized_data; // Output

    // Iterate over the lines of input
    unsigned dimension_count = 0;
    std::vector < std::string >::const_iterator the_iterator;
    for (the_iterator = rRawData.begin(); the_iterator != rRawData.end();
         the_iterator++)
    {
        const std::string& r_line_of_data = *the_iterator;
        std::stringstream line_stream (r_line_of_data);

        if (dimension_count == 0)
        {
            // First iteration, build the tokenized_data vector and push in x coordinates
            while (!line_stream.eof())
            {
                double item_coord;

                std::vector < double >x_coord;
                line_stream >> item_coord;
                x_coord.push_back (item_coord);
                tokenized_data.push_back (x_coord);
            }
        }
        else
        {
            unsigned current_node = 0;

            // Other iterations, push in coordinates other than x
            while (!line_stream.eof())
            {
                double item_coord;
                line_stream >> item_coord;
                tokenized_data[current_node].push_back (item_coord);
                current_node++;
            }
        }
        // Dimension of mesh is the same as the line of rawData
        dimension_count++;
    }

    if (SPACE_DIM != dimension_count)
    {
        EXCEPTION("SPACE_DIM  != dimension read from file");
    }
    return (tokenized_data);
}

template <unsigned ELEMENT_DIM, unsigned SPACE_DIM>
std::vector < std::vector < unsigned > >
    FemlabMeshReader<ELEMENT_DIM, SPACE_DIM>::TokenizeStringsToInts(const std::vector<std::string>& rRawData, unsigned dimensionOfObject)
{
    std::vector < std::vector < unsigned > >tokenized_data;

    // There are dimensionOfObject lines to be read
    for (unsigned i = 0; i < dimensionOfObject; i++)
    {
        const std::string& r_line_of_data = rRawData[i];
        std::stringstream line_stream (r_line_of_data);

        if (i == 0)
        {
            // First iteration, build the tokenized_data vector and push in x coordinates
            while (!line_stream.eof())
            {
                double item_index;

                std::vector < unsigned >first_index;
                line_stream >> item_index;
                first_index.push_back ((unsigned) (item_index - 0.5)); // item indices should be minus 1
                tokenized_data.push_back (first_index);
            }
        }
        else
        {
            unsigned current_node = 0;

            // Other iterations, push in coordinates other than x.
            while (!line_stream.eof())
            {
                double item_index;
                line_stream >> item_index;
                tokenized_data[current_node].
                push_back ((unsigned) (item_index - 0.5));
                current_node++;
            }
        }
    }
    return (tokenized_data);
}


// Explicit instantiation
template class FemlabMeshReader<1,1>;
template class FemlabMeshReader<1,2>;
template class FemlabMeshReader<1,3>;
template class FemlabMeshReader<2,2>;
template class FemlabMeshReader<2,3>;
template class FemlabMeshReader<3,3>;