halfmesh_detach_half.hpp

// Description: Detaches a half-edge from its origin.

#ifndef PASTELGEOMETRY_HALFMESH_DETACH_HALF_HPP
#define PASTELGEOMETRY_HALFMESH_DETACH_HALF_HPP

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

namespace Pastel
{

    template <
        typename Settings, 
        template <typename> class Customization>
    void HalfMesh<Settings, Customization>::detachHalf(
        const Half_ConstIterator& half)
    {
        if (!half.isNormal())
        {
            return;
        }

        Vertex_Iterator origin = cast(half->origin());
        Half_Iterator in = cast(half->previous());
        Half_Iterator out = cast(half->rotateNext());

        if (origin->half() == half)
        {
            origin->half_ = 
                (out == half) ?
                Half_Iterator() : out;
        }

        in->next_ = out;
        out->previous_ = in;
    }

}

#endif