/usr/include/InsightToolkit/Review/itkQuadEdgeMeshTopologyChecker.txx is in libinsighttoolkit3-dev 3.20.1+git20120521-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkQuadEdgeMeshTopologyChecker.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 __itkQuadEdgeMeshTopologyChecker_txx
#define __itkQuadEdgeMeshTopologyChecker_txx
#include "itkQuadEdgeMeshTopologyChecker.h"
namespace itk
{
template< class TMesh >
QuadEdgeMeshTopologyChecker< TMesh >
::QuadEdgeMeshTopologyChecker()
{
m_ExpectedNumberOfPoints = 0;
m_ExpectedNumberOfEdges = 0;
m_ExpectedNumberOfFaces = 0;
m_ExpectedNumberOfBoundaries = 0;
m_ExpectedGenus = 0;
m_Mesh = 0;
}
template< class TMesh >
bool
QuadEdgeMeshTopologyChecker< TMesh >
::ValidateEulerCharacteristic() const
{
if( ! this->m_Mesh )
{
return( false );
}
typename BoundaryEdges::Pointer boundaryEdges = BoundaryEdges::New( );
// Number of USED points
unsigned long numPoints = m_Mesh->ComputeNumberOfPoints( );
// Number of USED edges
unsigned long numEdges = m_Mesh->ComputeNumberOfEdges( );
// Number of USED faces
unsigned long numFaces = m_Mesh->ComputeNumberOfFaces( );
// Number of Boundaries
typename BoundaryEdges::OutputType
listOfBoundaries = boundaryEdges->Evaluate( (*m_Mesh) );
unsigned long 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...
long twiceGenus = 2 - numBounds - numFaces + numEdges - 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< class TMesh >
void
QuadEdgeMeshTopologyChecker< TMesh >
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "ExpectedNumberOfPoints: "
<< static_cast<long>(m_ExpectedNumberOfPoints) << std::endl;
os << indent << "ExpectedNumberOfEdges: "
<< static_cast<long>(m_ExpectedNumberOfEdges) << std::endl;
os << indent << "ExpectedNumberOfFaces: "
<< static_cast<long>(m_ExpectedNumberOfFaces) << std::endl;
os << indent << "ExpectedNumberOfBoundaries: "
<< static_cast<long>(m_ExpectedNumberOfBoundaries) << std::endl;
os << indent << "ExpectedGenus: "
<< static_cast<long>(m_ExpectedGenus) << std::endl;
os << indent << "Mesh: " << m_Mesh << std::endl;
}
}
#endif
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