TAPsHEHalfEdge.cpp

Go to the documentation of this file.

/******************************************************************************
TAPsHEHalfEdge.cpp

HE <==> Half-Edge
HEHalfEdge class is a class for 3D half-edge.
It contains:
  - originating vertex
  - incident face
  - pair of this half-edge
  - next half-edge (ccw)
  - previous half-edge (cw)

Not supposed to be a parent class.
Support only manifold objects.

SUKITTI PUNAK   (04/03/2005)
UPDATE          (04/15/2005)
******************************************************************************/
#include "TAPsHEHalfEdge.hpp"
// Using Inclusion Model (i.e. definitions are included in declarations)
//                       (this name.cpp is included in name.hpp)
// Each friend is defined directly inside its declaration.

BEGIN_NAMESPACE_TAPs
//=============================================================================
// Constructor(s) and Destructor
//-----------------------------------------------------------------------------
template <typename T>
HEHalfEdge<T>::HEHalfEdge ( HEVertex<T>   * const ptrOrigVertex, 
                            HEFace<T>     * const ptrIncidentFace,
                            HEHalfEdge<T> * const ptrPrev,
                            HEHalfEdge<T> * const ptrNext,
                            HEHalfEdge<T> * const ptrPair )
    : nOrigVertex   ( ptrOrigVertex ),
      nIncidentFace ( ptrIncidentFace ),
      nPrev         ( ptrPrev ),
      nNext         ( ptrNext ),
      nPair         ( ptrPair )
{
//  if ( ptrPrev != NULL )  nPrev = ptrPrev;
//  else                    nPrev = this;
//  if ( ptrNext != NULL )  nNext = ptrNext;
//  else                    nNext = this;
}   
//-----------------------------------------------------------------------------
template <typename T>
HEHalfEdge<T>::HEHalfEdge ( HEHalfEdge<T> const &he ) 
    : nOrigVertex   ( he.nOrigVertex ),
      nIncidentFace ( he.nIncidentFace ),
      nPrev         ( he.nPrev ),
      nNext         ( he.nNext ),
      nPair         ( he.nPair )
{}  
//-----------------------------------------------------------------------------
template <typename T>
HEHalfEdge<T>::~HEHalfEdge ()
{}
//-----------------------------------------------------------------------------
/*
//=============================================================================
// Operations
//-----------------------------------------------------------------------------

template <typename T>
HEHalfEdge<T> * HEHalfEdge<T>::Insert ( HEHalfEdge<T> * const n )
{
    HEHalfEdge<T> *c = nNext;
    n->nNext = c;
    n->nPrev = this;
    nNext    = n;
    c->nPrev = n;
    return n;
}
//-----------------------------------------------------------------------------
template <typename T>
HEHalfEdge<T> * HEHalfEdge<T>::Remove ()
{
    if ( nPrev ) {
        nPrev->nNext = nNext;
        nPrev = NULL;
    }
    if ( nNext ) {
        nNext->nPrev = nPrev;
        nNext = NULL;
    }
    return this;
}
//-----------------------------------------------------------------------------
template <typename T>
void HEHalfEdge<T>::Delete ()
{
    delete Remove();
}
//-----------------------------------------------------------------------------
template <typename T>
HEHalfEdge<T> * HEHalfEdge<T>::Splice ( HEHalfEdge<T> * const n )
{
    HEHalfEdge<T> *a  = this;
    HEHalfEdge<T> *an = a->nNext;
    HEHalfEdge<T> *bn = b->nNext;
    a->nNext = bn;
    b->nNext = an;
    an->nPrev = b;
    bn->nPrev = a;
}
//-----------------------------------------------------------------------------
template <typename T>
void HEHalfEdge<T>::ClearExceptItself ()
{
    HEHalfEdge<T> *ptr = nNext;
    while ( nNext != this ) {
        nNext = nNext->nNext;
        nNext->nPrev = this;
        delete ptr;
    }
}
//*/
//-----------------------------------------------------------------------------
//=============================================================================
END_NAMESPACE_TAPs
//345678901234567890123456789012345678901234567890123456789012345678901234567890
//--+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8