/usr/include/ITK-4.5/itkQuadEdgeMeshTopologyChecker.hxx is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
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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 __itkQuadEdgeMeshTopologyChecker_hxx
#define __itkQuadEdgeMeshTopologyChecker_hxx
#include "itkQuadEdgeMeshTopologyChecker.h"
namespace itk
{
template< typename TMesh >
QuadEdgeMeshTopologyChecker< TMesh >
::QuadEdgeMeshTopologyChecker()
{
m_ExpectedNumberOfPoints = NumericTraits< PointIdentifier >::Zero;
m_ExpectedNumberOfEdges = NumericTraits< CellIdentifier >::Zero;
m_ExpectedNumberOfFaces = NumericTraits< CellIdentifier >::Zero;
m_ExpectedNumberOfBoundaries = NumericTraits< CellIdentifier >::Zero;
m_ExpectedGenus = NumericTraits< OffsetValueType >::Zero;
m_Mesh = NULL;
}
template< typename TMesh >
bool
QuadEdgeMeshTopologyChecker< TMesh >
::ValidateEulerCharacteristic() const
{
if ( !this->m_Mesh )
{
return ( false );
}
typename BoundaryEdges::Pointer boundaryEdges = BoundaryEdges::New();
// Number of USED points
PointIdentifier numPoints = m_Mesh->ComputeNumberOfPoints();
// Number of USED edges
CellIdentifier numEdges = m_Mesh->ComputeNumberOfEdges();
// Number of USED faces
CellIdentifier numFaces = m_Mesh->ComputeNumberOfFaces();
// Number of Boundaries
typename BoundaryEdges::OutputType
listOfBoundaries = boundaryEdges->Evaluate( ( *m_Mesh ) );
CellIdentifier numBounds = listOfBoundaries->size();
delete listOfBoundaries;
/**
* Number of points
*
* There are two methods to get the number of points.
* 1. itk::QuadEdgeMesh::ComputeNumberOfPoints()
* 2. itk::Mesh::GetNumberOfPoints()
*
* As an itk::QuadEdgeMesh is an itk::Mesh by inheritance, the user
* can use both. 1. will returned the number of points actually
* used by at least one edge, while 2. will give you the number
* of points in the container. Number of unused points can be found
* by making the difference between the two values.
*/
if ( m_Mesh->GetNumberOfPoints() != numPoints )
{
// They are isolated vertices:
return ( false );
}
// The euler formula states:
// numFaces - numEdges + numPoints == 2 - 2 * genus - numBounds
// hence ( 2 - numBounds - numFaces + numEdges - numPoints ) must
// be an odd number. Let's check it out:
// Note that genus can take a negative value...
OffsetValueType twiceGenus =
OffsetValueType(2) - OffsetValueType(numBounds)
- OffsetValueType(numFaces) + OffsetValueType(numEdges)
- OffsetValueType(numPoints);
if ( twiceGenus % 2 )
{
return ( false );
}
// Look is they are isolated edges
CellsContainerConstIterator cellIterator = m_Mesh->GetCells()->Begin();
CellsContainerConstIterator cellEnd = m_Mesh->GetCells()->End();
while ( cellIterator != cellEnd )
{
// Is the cell an Edge ?
if ( EdgeCellType * cell =
dynamic_cast< EdgeCellType * >( cellIterator.Value() ) )
{
if ( QEPrimal * edge = cell->GetQEGeom() )
{
// Is the edge without associated faces ?.
if ( edge->IsWire() )
{
// Is it an isolated edge ?
if ( edge->IsIsolated() && edge->GetSym()->IsIsolated() )
{
return ( false );
}
}
}
else // cell->GetQEGEom( ) == NULL
{
// supposely impossible, throw exception
}
}
++cellIterator;
} // endof while
return ( true );
}
template< typename TMesh >
void
QuadEdgeMeshTopologyChecker< TMesh >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "ExpectedNumberOfPoints: "
<< m_ExpectedNumberOfPoints << std::endl;
os << indent << "ExpectedNumberOfEdges: "
<< m_ExpectedNumberOfEdges << std::endl;
os << indent << "ExpectedNumberOfFaces: "
<< m_ExpectedNumberOfFaces << std::endl;
os << indent << "ExpectedNumberOfBoundaries: "
<< m_ExpectedNumberOfBoundaries << std::endl;
os << indent << "ExpectedGenus: "
<< m_ExpectedGenus << std::endl;
os << indent << "Mesh: " << m_Mesh << std::endl;
}
}
#endif
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