rect.h

/********************************************************************
 * Copyright (C) 2015 Liangliang Nan <liangliang.nan@gmail.com>
 * https://3d.bk.tudelft.nl/liangliang/
 *
 * This file is part of Easy3D. If it is useful in your research/work,
 * I would be grateful if you show your appreciation by citing it:
 * ------------------------------------------------------------------
 *      Liangliang Nan.
 *      Easy3D: a lightweight, easy-to-use, and efficient C++ library
 *      for processing and rendering 3D data.
 *      Journal of Open Source Software, 6(64), 3255, 2021.
 * ------------------------------------------------------------------
 *
 * Easy3D is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 3
 * as published by the Free Software Foundation.
 *
 * Easy3D 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 EASY3D_CORE_RECTANGLE_H
#define EASY3D_CORE_RECTANGLE_H
 
#include <algorithm>
 
#include <easy3d/core/vec.h>
 
 
namespace easy3d {

    template <typename FT>
    class GenericRect {
    public:
        GenericRect(const Vec<2, FT>& p, const Vec<2, FT>& q) {
            x_min_ = std::min(q.x, p.x);
            x_max_ = std::max(q.x, p.x);
            y_min_ = std::min(q.y, p.y);
            y_max_ = std::max(q.y, p.y);
        }

        GenericRect(FT xmin, FT xmax, FT ymin, FT ymax)
            : x_min_(std::min(xmin, xmax))
            , y_min_(std::min(ymin, ymax))
            , x_max_(std::max(xmin, xmax))
            , y_max_(std::max(ymin, ymax))
        {
        }

        FT& x_min() { return x_min_; }
        FT& y_min() { return y_min_; }
        FT& x_max() { return x_max_; }
        FT& y_max() { return y_max_; }
        FT x_min() const { return x_min_; }
        FT y_min() const { return y_min_; }
        FT x_max() const { return x_max_; }
        FT y_max() const { return y_max_; }

        FT& x() { return x_min_; }
        FT& y() { return y_min_; }
        FT x() const { return x_min_; }
        FT y() const { return y_min_; }

        FT width()  const { return x_max() - x_min(); }
        FT height() const { return y_max() - y_min(); }

        FT& left() { return x_min_; }
        FT& top()  { return y_min_; }
        FT& right() { return x_max_; }
        FT& bottom() { return y_max_; }
        FT left() const { return x_min_; }
        FT top() const  { return y_min_; }
        FT right() const  { return x_max_; }
        FT bottom() const { return y_max_; }

        Vec<2, FT> top_left() const  { return Vec<2, FT>(x_min_, y_min_); }
        Vec<2, FT> bottom_right() const  { return Vec<2, FT>(x_max_, y_max_); }
        Vec<2, FT> top_right() const  { return Vec<2, FT>(x_max_, y_min_); }
        Vec<2, FT> bottom_left() const  { return Vec<2, FT>(x_min_, y_max_); }

        Vec<2, FT> min_point() const { return Vec<2, FT>(x_min_, y_min_); }
        Vec<2, FT> max_point() const { return Vec<2, FT>(x_max_, y_max_); }

        Vec<2, FT> center() const {
            return Vec<2, FT>(FT(0.5) * (x_max() + x_min()), FT(0.5) * (y_max() + y_min()));
        }
 
    private:
        FT x_min_;
        FT y_min_;
        FT x_max_;
        FT y_max_;
    };
 
}
 
 
#endif  // EASY3D_CORE_RECTANGLE_H