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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction_hxx
#define itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction_hxx
#include "itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.h"
namespace itk
{
template< typename TMesh, typename 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.hxx
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