PhotometryFit.h

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// -*- LSST-C++ -*-
/*
 * This file is part of jointcal.
 *
 * Developed for the LSST Data Management System.
 * This product includes software developed by the LSST Project
 * (https://www.lsst.org).
 * See the COPYRIGHT file at the top-level directory of this distribution
 * for details of code ownership.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef LSST_JOINTCAL_PHOTOMETRY_FIT_H
#define LSST_JOINTCAL_PHOTOMETRY_FIT_H

#include <string>
#include <iostream>
#include <sstream>

#include "lsst/log/Log.h"
#include "lsst/jointcal/Associations.h"
#include "lsst/jointcal/CcdImage.h"
#include "lsst/jointcal/Chi2.h"
#include "lsst/jointcal/Eigenstuff.h"
#include "lsst/jointcal/FitterBase.h"
#include "lsst/jointcal/Tripletlist.h"
#include "lsst/jointcal/PhotometryModel.h"

namespace lsst {
namespace jointcal {

class PhotometryFit : public FitterBase {
public:
    PhotometryFit(std::shared_ptr<Associations> associations,
                  std::shared_ptr<PhotometryModel> photometryModel)
            : FitterBase(associations),
              _fittingModel(false),
              _fittingFluxes(false),
              _photometryModel(photometryModel),
              _nParModel(0),
              _nParFluxes(0) {
        _log = LOG_GET("jointcal.PhotometryFit");
    }

    PhotometryFit(PhotometryFit const &) = delete;
    PhotometryFit(PhotometryFit &&) = delete;
    PhotometryFit &operator=(PhotometryFit const &) = delete;
    PhotometryFit &operator=(PhotometryFit &&) = delete;

    void assignIndices(std::string const &whatToFit) override;

    void offsetParams(Eigen::VectorXd const &delta) override;

    std::shared_ptr<PhotometryModel> getModel() const { return _photometryModel; }

protected:
    void saveChi2MeasContributions(std::string const &filename) const override;

    void saveChi2RefContributions(std::string const &filename) const override;

private:
    bool _fittingModel, _fittingFluxes;
    std::shared_ptr<PhotometryModel> _photometryModel;

    // counts in parameter subsets.
    std::size_t _nParModel;
    std::size_t _nParFluxes;

    void accumulateStatImageList(CcdImageList const &ccdImageList, Chi2Accumulator &accum) const override;

    void accumulateStatRefStars(Chi2Accumulator &accum) const override;

    void getIndicesOfMeasuredStar(MeasuredStar const &measuredStar,
                                  IndexVector &indices) const override;

    void leastSquareDerivativesMeasurement(CcdImage const &ccdImage, TripletList &tripletList,
                                           Eigen::VectorXd &grad,
                                           MeasuredStarList const *measuredStarList = nullptr) const override;

    void leastSquareDerivativesReference(FittedStarList const &fittedStarList, TripletList &tripletList,
                                         Eigen::VectorXd &grad) const override;

#ifdef STORAGE
    Point transformFittedStar(FittedStar const &fittedStar, AstrometryTransform const *sky2TP,
                              Point const &refractionVector, double refractionCoeff, double mjd) const;
#endif
};
}  // namespace jointcal
}  // namespace lsst
#endif  // LSST_JOINTCAL_PHOTOMETRY_FIT_H