halfmesh_stream.hpp

#ifndef PASTELGEOMETRY_HALFMESH_STREAM_HPP
#define PASTELGEOMETRY_HALFMESH_STREAM_HPP

#include "pastel/geometry/halfmesh/halfmesh_stream.h"

namespace Pastel
{

    template <
        typename Settings,
        template <typename> class Customization>
    std::ostream& operator<<(
        std::ostream& stream,
        const HalfMesh<Settings, Customization>& mesh)
    {
        using Fwd = HalfMesh<Settings, Customization>;
        PASTEL_FWD(Vertex_ConstIterator);
        PASTEL_FWD(Half_ConstIterator);

        std::unordered_map<Vertex_ConstIterator,
            integer> vertexMap;

        {
            integer vertexId = 0;
            Vertex_ConstIterator vertex = mesh.vertexBegin();
            Vertex_ConstIterator end = mesh.vertexEnd();
            while (vertex != end)
            {
                vertexMap.emplace(vertex, vertexId);

                ++vertexId;
                ++vertex;
            }
        }

        Vertex_ConstIterator vertex = mesh.vertexBegin();
        Vertex_ConstIterator end = mesh.vertexEnd();
        while (vertex != end)
        {
            stream << "Vertex " << vertexMap[vertex] << std::endl;

            Half_ConstIterator halfBegin = vertex.half();
            if (!halfBegin.empty())
            {
                Half_ConstIterator half = halfBegin;
                do
                {
                    stream << vertexMap[half.destination()] << ", ";
                    half = half.rotateNext();
                }
                while (half != halfBegin);
                stream << std::endl;
            }

            ++vertex;
        }

        return stream;
    }

}

#endif