ChipVisitAstrometryMapping.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_CHIP_VISIT_ASTROMETRY_MAPPING_H
#define LSST_JOINTCAL_CHIP_VISIT_ASTROMETRY_MAPPING_H
 
#include "memory"
 
#include "lsst/jointcal/AstrometryMapping.h"
#include "lsst/jointcal/Eigenstuff.h"
#include "lsst/jointcal/SimpleAstrometryMapping.h"
 
namespace lsst {
namespace jointcal {

class ChipVisitAstrometryMapping : public AstrometryMapping {
public:
    ChipVisitAstrometryMapping(std::shared_ptr<SimpleAstrometryMapping> chipMapping,
                               std::shared_ptr<SimpleAstrometryMapping> visitMapping);

    ChipVisitAstrometryMapping(ChipVisitAstrometryMapping const &) = delete;
    ChipVisitAstrometryMapping(ChipVisitAstrometryMapping &&) = delete;
    ChipVisitAstrometryMapping &operator=(ChipVisitAstrometryMapping const &) = delete;
    ChipVisitAstrometryMapping &operator=(ChipVisitAstrometryMapping &&) = delete;
 
    std::size_t getNpar() const override;
 
    void getMappingIndices(IndexVector &indices) const override;

    void computeTransformAndDerivatives(FatPoint const &where, FatPoint &outPoint,
                                        Eigen::MatrixX2d &H) const override;
    void transformPosAndErrors(FatPoint const &where, FatPoint &outPoint) const override;

    void offsetParams(Eigen::VectorXd const &delta) override {
        _m1->offsetParams(delta.segment(_m1->getIndex(), _m1->getNpar()));
        _m2->offsetParams(delta.segment(_m2->getIndex() + _m1->getNpar(), _m2->getNpar()));
    }

    AstrometryTransform const &getTransform1() const { return _m1->getTransform(); }

    AstrometryTransform const &getTransform2() const { return _m2->getTransform(); }
 
    void positionDerivative(Point const &where, Eigen::Matrix2d &derivative, double epsilon) const override;

    void freezeErrorTransform();
 
    void print(std::ostream &out) const override;
 
private:
    friend class ConstrainedAstrometryModel;
    void setWhatToFit(bool fittingT1, bool fittingT2);
 
    std::shared_ptr<SimpleAstrometryMapping> _m1, _m2;
    Eigen::Index _nPar1{}, _nPar2{};
    struct tmpVars  // just there to get around constness issues
    {
        Eigen::MatrixX2d h1, h2;
        Eigen::Matrix2d dt2dx;
    };
 
    std::unique_ptr<tmpVars> tmp;
};
}  // namespace jointcal
}  // namespace lsst
 
#endif  // LSST_JOINTCAL_CHIP_VISIT_ASTROMETRY_MAPPING_H