LinearFunctor.cc

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// -*- lsst-c++ -*-

/*
 * LSST Data Management System
 * Copyright 2015 LSST Corporation.
 *
 * 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 <http://www.lsstcorp.org/LegalNotices/>.
 */

#include <memory>
#include "lsst/afw/geom/Functor.h"

namespace lsst {
namespace afw {
namespace geom {

LinearFunctor::LinearFunctor(double slope, double intercept)
        : Functor("LinearFunctor"), _slope(slope), _intercept(intercept) {}

LinearFunctor::LinearFunctor(LinearFunctor const &) = default;
LinearFunctor::LinearFunctor(LinearFunctor &&) = default;
LinearFunctor &LinearFunctor::operator=(LinearFunctor const &) = default;
LinearFunctor &LinearFunctor::operator=(LinearFunctor &&) = default;

std::shared_ptr<Functor> LinearFunctor::clone() const {
    return std::make_shared<LinearFunctor>(_slope, _intercept);
}

double LinearFunctor::operator()(double x) const { return _slope * x + _intercept; }

double LinearFunctor::derivative(double x) const { return _slope; }

}  // namespace geom
}  // namespace afw
}  // namespace lsst