include/facet.hh

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#ifndef A48_FACET_HH
#define A48_FACET_HH

//== NAMESPACES ===============================================================

namespace a48 {

//== CLASS DEFINITION =========================================================

template< class Traits >
class FaceT {

public:

    typedef typename Traits::halfedge_type halfedge_type; 

    FaceT() : h(0) { }

    FaceT( halfedge_type *_h ) : h(_h) { }

    bool is_boundary( void ) const {
        const halfedge_type *hcurr = h;
        do {
            if( hcurr->is_boundary() ) return true;
            hcurr = hcurr->next();
        } while (hcurr != h);
        return false;
    }

    bool is_triangle( void ) const { return this->sides() == 3; }

    // @name Get functions

    const halfedge_type* halfedge( void ) const { return h; }
    halfedge_type* halfedge( void ) { return h; }

    unsigned int sides( void ) const {
        unsigned int n = 0;
        const halfedge_type *hcurr = this->halfedge();
        do { ++n; hcurr = hcurr->next(); } while (hcurr != this->halfedge());
        return n;
    }

    unsigned int non_boundary_sides( void ) const {
        unsigned int n = 0;
        const halfedge_type *hcurr = this->halfedge();
        do { if( !hcurr->is_boundary() ) ++n; hcurr = hcurr->next(); } while (hcurr != this->halfedge());
        return n;
    }


    void set_halfedge( halfedge_type *_h ) { h = _h; }

private:

    halfedge_type *h; 

};

//== CLASS DEFINITION =========================================================

template< class Traits >
class AdaptiveFaceT : public FaceT< Traits > {

public:

    typedef typename Traits::vertex_type vertex_type; 
    typedef typename Traits::halfedge_type halfedge_type; 

    AdaptiveFaceT() : FaceT< Traits >() { }

    AdaptiveFaceT( halfedge_type *_h ) : FaceT< Traits >(_h) { }

    // @name Get functions

    const halfedge_type* split_halfedge( void ) const { return this->halfedge(); }

    halfedge_type* split_halfedge( void ) { return this->halfedge(); }

    const vertex_type* weld_vertex( void ) const { return this->halfedge()->next()->vertex(); }

    vertex_type* weld_vertex( void ) { return this->halfedge()->next()->vertex(); }

    unsigned int level( void ) const {
        return std::max( std::max( this->halfedge()->vertex()->level(),
                       this->halfedge()->next()->vertex()->level() ),
                 this->halfedge()->previous()->vertex()->level() );
    }


};

//=============================================================================
} // namespace a48
//=============================================================================
#endif // A48_FACET_HH
//=============================================================================