SurfaceNM3D.h

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/*******************************************************************************
 * Copyright (C) 2017-2023 Theodore Chang
 *
 * 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 <http://www.gnu.org/licenses/>.
 ******************************************************************************/
#ifndef SURFACENM3D_H
#define SURFACENM3D_H
 
#include <suanPan.h>
 
class SurfaceNM3D {
    const mat para_set;
    const double c;
 
    [[nodiscard]] static double evaluate(double, double, double, const mat&);
    [[nodiscard]] static vec differentiate(const mat&, uword, uword);
 
public:
    explicit SurfaceNM3D(double, // c
                         mat&& = {});
 
    [[nodiscard]] double compute_sf(const vec&, const vec&) const;
    [[nodiscard]] vec compute_dsf(const vec&, const vec&) const;
    [[nodiscard]] mat compute_ddsf(const vec&, const vec&) const;
};
 
#endif