OpenSpace/modules/iswa/util/dataprocessortext.cpp

/*****************************************************************************************
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* OpenSpace                                                                             *
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* Copyright (c) 2014-2015                                                               *
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#include <modules/iswa/util/dataprocessortext.h>
#include <algorithm>
#include <iterator>
#include <boost/iostreams/device/mapped_file.hpp>
namespace {
    const std::string _loggerCat = "DataProcessorText";
}

namespace openspace{

DataProcessorText::DataProcessorText()
    :DataProcessor()
{}

DataProcessorText::~DataProcessorText(){}

std::vector<std::string> DataProcessorText::readMetadata(std::string data){
    //The intresting part of the file looks like this:
    //# Output data: field with 61x61=3721 elements
    //# x           y           z           N           V_x         B_x

    std::vector<std::string> options = std::vector<std::string>();
    std::string info = "# Output data: field with "; //The string where the interesting data begins
    if(!data.empty()){
        std::string line;
        std::stringstream memorystream(data);

        while(getline(memorystream, line)){
            if(line.find(info) == 0){
                line = line.substr(info.size());
                std::stringstream ss(line);

                std::string token;
                getline(ss, token, 'x');
                int x = std::stoi(token);

                getline(ss, token, '=');
                int y = std::stoi(token);

                _dimensions = glm::size3_t(x, y, 1);

                getline(memorystream, line);
                line = line.substr(1); //because of the # char

                ss = std::stringstream(line);
                std::string option;
                while(ss >> option){
                    if(_coordinateVariables.find(option) == _coordinateVariables.end())
                        options.push_back(option);
                }
            }
        }
    }
    return options;
}

void DataProcessorText::addDataValues(std::string data, properties::SelectionProperty& dataOptions){
    int numOptions = dataOptions.options().size(); 
    initializeVectors(numOptions);

    if(!data.empty()){
        std::string line;
        std::stringstream memorystream(data);

        std::vector<float> sum(numOptions, 0.0f); //for standard diviation in the add() function
        std::vector<std::vector<float>> optionValues(numOptions, std::vector<float>());

        std::vector<float> values;
        float value;

        while(getline(memorystream, line)){
            if(line.find("#") == 0) continue;

            values = std::vector<float>();
            std::stringstream ss(line);
            copy(
                std::istream_iterator<float> (ss),
                std::istream_iterator<float> (),
                back_inserter(values)
            );

          if(values.size() <= 0) continue;

            for(int i=0; i<numOptions; i++){
                value = values[i+3];

                optionValues[i].push_back(value);
                _min[i] = std::min(_min[i], value);
                _max[i] = std::max(_max[i], value);
                sum[i] += value;
            }
        }

        add(optionValues, sum);
    }
}

std::vector<float*> DataProcessorText::processData(std::string data, properties::SelectionProperty& dataOptions){
    if(!data.empty()){
        std::string line;
        std::stringstream memorystream(data);

        std::vector<int> selectedOptions = dataOptions.value();
        int numSelected = selectedOptions.size();
        int numOptions  = dataOptions.options().size();

        std::vector<float> values;
        float value;

        std::vector<float*> dataOptions(numOptions, nullptr);
        for(int option : selectedOptions){
            dataOptions[option] = new float[_dimensions.x*_dimensions.y]{0.0f};
        }

        int numValues = 0;
        while(getline(memorystream, line)){
            if(line.find("#") == 0) continue;

            values = std::vector<float>();
            std::stringstream ss(line);
            copy(
                std::istream_iterator<float> (ss),
                std::istream_iterator<float> (),
                back_inserter(values)
            );

            for(int option : selectedOptions){
                value = values[option+3]; //+3 because options x, y and z in the file
                dataOptions[option][numValues] = processDataPoint(value, option);
            }
            numValues++;
        }

        calculateFilterValues(selectedOptions);
        return dataOptions;
    }
    return std::vector<float*>();
}

}//namespace openspace