face.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_MESH_VIEWS_ELEMENTS_FACE_H
#define VCL_MESH_VIEWS_ELEMENTS_FACE_H
 
#include <vclib/mesh/requirements/face_requirements.h>
 
namespace vcl {
 
template<typename Rng>
concept FaceRangeConcept =
    Range<Rng> &&
    FaceConcept<typename std::ranges::iterator_t<Rng>::value_type>;
 
template<typename Rng>
concept FacePointerRangeConcept =
    Range<Rng> &&
    IsPointer<typename std::ranges::iterator_t<Rng>::value_type> &&
    FaceConcept<typename std::decay_t<
        RemovePtr<typename std::ranges::iterator_t<Rng>::value_type>>>;
 
namespace views {
namespace detail {
 
struct FacesView
{
    constexpr FacesView() = default;
 
    template<FaceMeshConcept R>
    friend constexpr auto operator|(R&& r, FacesView)
    {
        return r.faces();
    }
};
 
} // namespace detail
 
inline constexpr detail::FacesView faces;
 
} // namespace views
} // namespace vcl
 
#endif // VCL_MESH_VIEWS_ELEMENTS_FACE_H