ChebyMap.h

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/*
 * LSST Data Management System
 * Copyright 2017 AURA/LSST.
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * 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 LSST License Statement and
 * the GNU General Public License along with this program.  If not,
 * see <https://www.lsstcorp.org/LegalNotices/>.
 */
#ifndef ASTSHIM_CHEBYMAP_H
#define ASTSHIM_CHEBYMAP_H

#include <algorithm>
#include <memory>
#include <vector>

#include "astshim/base.h"
#include "astshim/Mapping.h"

namespace ast {

class ChebyDomain {
public:
    ChebyDomain(std::vector<double> const &lbnd, std::vector<double> const &ubnd) : lbnd(lbnd), ubnd(ubnd) {}
    std::vector<double> const lbnd;  
    std::vector<double> const ubnd;  
};

class ChebyMap : public Mapping {
    friend class Object;

public:
    explicit ChebyMap(ConstArray2D const &coeff_f, ConstArray2D const &coeff_i,
                      std::vector<double> const &lbnd_f, std::vector<double> const &ubnd_f,
                      std::vector<double> const &lbnd_i, std::vector<double> const &ubnd_i,
                      std::string const &options = "")
            : Mapping(reinterpret_cast<AstMapping *>(
                      _makeRawChebyMap(coeff_f, coeff_i, lbnd_f, ubnd_f, lbnd_i, ubnd_i, options))) {}

    explicit ChebyMap(ConstArray2D const &coeff_f, int nout, std::vector<double> const &lbnd_f,
                      std::vector<double> const &ubnd_f, std::string const &options = "IterInverse=0")
            : Mapping(reinterpret_cast<AstMapping *>(
                      _makeRawChebyMap(coeff_f, nout, lbnd_f, ubnd_f, options))) {}

    virtual ~ChebyMap() {}

    ChebyMap(ChebyMap const &) = default;
    ChebyMap(ChebyMap &&) = default;
    ChebyMap &operator=(ChebyMap const &) = delete;
    ChebyMap &operator=(ChebyMap &&) = default;

    std::shared_ptr<ChebyMap> copy() const { return std::static_pointer_cast<ChebyMap>(copyPolymorphic()); }

    ChebyDomain getDomain(bool forward) const;

    ChebyMap polyTran(bool forward, double acc, double maxacc, int maxorder, std::vector<double> const &lbnd,
                      std::vector<double> const &ubnd) const;

    ChebyMap polyTran(bool forward, double acc, double maxacc, int maxorder) const;

protected:
    virtual std::shared_ptr<Object> copyPolymorphic() const override {
        return copyImpl<ChebyMap, AstChebyMap>();
    }

    ChebyMap(AstChebyMap *map);

private:
    AstChebyMap *_makeRawChebyMap(ConstArray2D const &coeff_f, ConstArray2D const &coeff_i,
                                  std::vector<double> const &lbnd_f, std::vector<double> const &ubnd_f,
                                  std::vector<double> const &lbnd_i, std::vector<double> const &ubnd_i,
                                  std::string const &options = "") const;

    AstChebyMap *_makeRawChebyMap(ConstArray2D const &coeff_f, int nout, std::vector<double> const &lbnd_f,
                                  std::vector<double> const &ubnd_f, std::string const &options = "") const;
};

}  // namespace ast

#endif