Mapping.h

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// -*- LSST-C++ -*-
#ifndef LSST_JOINTCAL_MAPPING_H
#define LSST_JOINTCAL_MAPPING_H

#include <vector>
#include "lsst/jointcal/Eigenstuff.h"

namespace lsst {
namespace jointcal {

class FatPoint;
class Point;

class Mapping {
public:
    virtual unsigned getNpar() const = 0;

    virtual void getMappingIndices(std::vector<unsigned> &indices) const = 0;


    virtual void computeTransformAndDerivatives(FatPoint const &where, FatPoint &outPoint,
                                                Eigen::MatrixX2d &H) const = 0;
    virtual void transformPosAndErrors(FatPoint const &where, FatPoint &outPoint) const = 0;

    //  virtual void freezeErrorTransform() = 0;

    virtual void offsetParams(Eigen::VectorXd const &delta) = 0;

    virtual void positionDerivative(Point const &where, Eigen::Matrix2d &derivative,
                                    double epsilon) const = 0;

    virtual ~Mapping(){};
};
}  // namespace jointcal
}  // namespace lsst
#endif  // LSST_JOINTCAL_MAPPING_H