Triangle.h

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <vector>
 
#include "MathLib/Point3d.h"
 
namespace GeoLib
{
 
class Point;

class Triangle final
{
public:
    Triangle(std::vector<Point*> const& pnt_vec,
             std::size_t pnt_a,
             std::size_t pnt_b,
             std::size_t pnt_c);

    const std::size_t& operator[](std::size_t i) const
    {
        assert(i < 3);
        return _pnt_ids[i];
    }

    const Point* getPoint(std::size_t i) const
    {
        assert(i < 3);
        return _pnts[_pnt_ids[i]];
    }

    bool containsPoint(
        MathLib::Point3d const& q,
        double eps = std::numeric_limits<float>::epsilon()) const;
 
private:
    std::vector<Point*> const& _pnts;
    std::array<std::size_t, 3> _pnt_ids;
};
}  // namespace GeoLib