TriangulationFigures.hpp

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//
// Thor C++ Library
// Copyright (c) 2011-2016 Jan Haller
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//


#ifndef THOR_TRIANGULATIONFIGURES_HPP
#define THOR_TRIANGULATIONFIGURES_HPP

#include <Thor/Config.hpp>

#include <SFML/System/Vector2.hpp>
#include <SFML/System/NonCopyable.hpp>

#include <array>
#include <cassert>


namespace thor
{


template <typename V>
class Edge
{
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public member functions
    public:
                                    Edge(V& corner0, V& corner1);

        V&                          operator[] (std::size_t cornerIndex);

        const V&                    operator[] (std::size_t cornerIndex) const;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Protected variables
    protected:
        std::array<V*, 2>           mCorners;
};


template <typename V>
class Triangle
{
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public member functions
    public:
                                    Triangle(V& corner0, V& corner1, V& corner2);

        V&                          operator[] (std::size_t cornerIndex);

        const V&                    operator[] (std::size_t cornerIndex) const;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Private variables
    private:
        std::array<V*, 3>           mCorners;
};


template <typename V>
struct TriangulationTraits
{
    static sf::Vector2f getPosition(const V& vertex)
    {
        return vertex.getPosition();
    }
};

// Triangulation traits: Specialization for sf::Vector2f
template <>
struct TriangulationTraits<sf::Vector2f>
{
    static sf::Vector2f getPosition(sf::Vector2f vertex)
    {
        return vertex;
    }
};


} // namespace thor

#include <Thor/Math/Detail/TriangulationFigures.inl>
#endif // THOR_TRIANGULATIONFIGURES_HPP