shells/subdiv/Triangle.h

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// -*- C++ -*-
//
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
//                                   Fehmi Cirak   
//                       California Institute of Technology
//                          (C) 2003 All Rights Reserved
//
// <LicenseText>
//
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
#ifndef __Triangle_h__
#define __Triangle_h__



namespace subdiv {

    template <typename V>
    class Triangle {    
    public:
        Triangle(){}
        Triangle(V* a, V* b, V* c) {
            _m_v[0]=a;
            _m_v[1]=b;
            _m_v[2]=c;
            _m_t[0]=NULL;
            _m_t[1]=NULL;
            _m_t[2]=NULL;
        } 
        ~Triangle(){}
        
        // interface
        V* a(){return _m_v[0];}
        V* b(){return _m_v[1];}
        V* c(){return _m_v[2];}
        
        std::pair<V*, V*> vertexPairOnEdge(int i) {
            return std::make_pair(_m_v[i], _m_v[Next[i]]);
        }
        
        // output
        void printConnectivityData(std::ostream& os) {
            os << _m_v[0]->number() << " "<< _m_v[1]->number() << " "<< _m_v[2]->number();
        }
        
        inline Triangle*& across( const V*, const V* );
        inline Triangle*& neighbor(int i){return _m_t[i];}
                
    private:
        V*          _m_v[3];         // first vertex
        Triangle*   _m_t[3];         // neighbouring triangles
    };

#include "Triangle.cc"
    
}
#endif /*__Triangle_h__*/

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