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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.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 __itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction_txx
#define __itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction_txx
#include "itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.h"
namespace itk
{
template < class TMesh, class TQEType >
typename QuadEdgeMeshEulerOperatorCreateCenterVertexFunction< TMesh, TQEType >::OutputType
QuadEdgeMeshEulerOperatorCreateCenterVertexFunction< TMesh, TQEType >::
Evaluate( QEType* e )
{
// Is there any input ?
#ifndef NDEBUG
if( !e )
{
itkDebugMacro( "Input is not an edge." );
return( (QEType*) 0 );
}
if( !this->m_Mesh )
{
itkDebugMacro( "No mesh present." );
return( (OutputType) 0 );
}
// Is left face set ?
if ( !e->IsLeftSet( ) )
{
itkDebugMacro( "Argument edge has no left face." );
return( (OutputType) 0 );
}
#endif
// remove left face
this->m_Mesh->DeleteFace( e->GetLeft( ) );
// create new point geometry
unsigned int sum = 0;
VectorType vec;
vec.Fill( 0 );
PointIdentifier pid = this->m_Mesh->FindFirstUnusedPointIndex( );
typedef std::map< QEType*, PointIdentifier > AssociatedBarycenters;
AssociatedBarycenters m_AssocBary;
typedef typename QEType::IteratorGeom QEIterator;
QEIterator lit = e->BeginGeomLnext( );
while( lit != e->EndGeomLnext( ) )
{
QEType* g = lit.Value( );
vec += this->m_Mesh->GetVector( g->GetOrigin( ) );
sum++;
m_AssocBary[ g ] = pid;
lit++;
} // rof
vec /= CoordRepType( sum );
PointType p;
for( unsigned int i = 0; i<3; i++)
{
p[i] = vec[i];
}
// add new point to mesh
this->m_NewPointID = this->m_Mesh->AddPoint( p );
PointIdentifier tempPoint;
// create edges and faces
tempPoint = e->GetDestination( );
this->m_Mesh->AddFaceTriangle( this->m_NewPointID,
e->GetOrigin( ),
tempPoint );
QEType* edgeRef = this->m_Mesh->FindEdge( this->m_NewPointID, tempPoint );
while ( !edgeRef->IsLeftSet( ) )
{
tempPoint = edgeRef->GetLnext( )->GetDestination( );
this->m_Mesh->AddFaceTriangle( this->m_NewPointID,
edgeRef->GetLnext( )->GetOrigin( ),
tempPoint );
edgeRef = this->m_Mesh->FindEdge( this->m_NewPointID, tempPoint );
}
return( e->GetLnext( ) );
}
} // namespace itk
#endif
// eof - itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.txx
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