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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkQuadEdgeMeshEulerOperatorSplitVertexFunction.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkQuadEdgeMeshEulerOperatorSplitVertexFunction_txx
#define __itkQuadEdgeMeshEulerOperatorSplitVertexFunction_txx
#include "itkQuadEdgeMeshEulerOperatorSplitVertexFunction.h"
namespace itk
{
template < class TMesh, class TQEType >
typename QuadEdgeMeshEulerOperatorSplitVertexFunction< TMesh, TQEType >::OutputType
QuadEdgeMeshEulerOperatorSplitVertexFunction< TMesh, TQEType >::
Evaluate( QEType* h, QEType* g )
{
if( !this->m_Mesh )
{
itkDebugMacro( "No mesh present." );
return( (QEType*) 0 );
}
if ( ( h == (QEType*)(0) ) || ( g == (QEType*)(0) ) )
{
itkDebugMacro( "One or more argument(s) is(are) null." );
return( (QEType*) 0 );
}
if ( h == g )
{
itkDebugMacro( "The two half-edges are the same. No antenna allowed." );
return( (QEType*) 0 );
}
if( h->GetDestination( ) != g->GetDestination( ) )
{
itkDebugMacro( "The two half-edges must be incident to the same vertex." );
return( (QEType*) 0 );
}
// delete the faces
this->m_Mesh->DeleteFace( h->GetRight( ) );
this->m_Mesh->DeleteFace( g->GetRight( ) );
// splice to create a new point and disconnect the rings
this->m_NewPoint = this->m_Mesh->Splice( h->GetSym( ), g->GetSym( ) );
// then add a new edge
QEType* ReturnedEdge = this->m_Mesh->AddEdge( g->GetDestination( ),
h->GetDestination( ) );
// Build two new faces
this->m_Mesh->AddFace( h->GetSym( ) );
this->m_Mesh->AddFace( g->GetSym( ) );
this->m_Mesh->Modified( );
return( ReturnedEdge );
}
} // namespace itk
#endif
// eof - itkQuadEdgeMeshEulerOperatorSplitVertexFunction.txx
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