/usr/include/ITK-4.5/itkPathConstIterator.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 __itkPathConstIterator_hxx
#define __itkPathConstIterator_hxx
#include "itkPathConstIterator.h"
#include "itkOffset.h" // for operator++
namespace itk
{
template< typename TImage, typename TPath >
PathConstIterator< TImage, TPath >
::PathConstIterator(const ImageType *imagePtr, const PathType *pathPtr)
{
m_ZeroOffset.Fill(0);
m_Image = imagePtr;
m_Path = pathPtr;
m_ImageOrigin = m_Image->GetOrigin();
m_ImageSpacing = m_Image->GetSpacing();
m_Region = m_Image->GetLargestPossibleRegion();
m_ImageSize = m_Region.GetSize().m_Size;
m_VisitStartIndexAsLastIndexIfClosed = true;
GoToBegin();
}
template< typename TImage, typename TPath >
PathConstIterator< TImage, TPath > &
PathConstIterator< TImage, TPath >
::operator=(const Self & it)
{
if(this != &it)
{
m_Image = it.m_Image; // copy the smart pointer
m_Path = it.m_Path; // copy the smart pointer
m_Region = it.m_Region;
m_ImageOrigin = it.m_ImageOrigin;
m_ImageSpacing = it.m_ImageSpacing;
m_ImageSize = it.m_ImageSize;
m_CurrentPathPosition = it.m_CurrentPathPosition;
m_CurrentImageIndex = it.m_CurrentImageIndex;
m_VisitStartIndexAsLastIndexIfClosed = it.m_VisitStartIndexAsLastIndexIfClosed;
}
return *this;
}
template< typename TImage, typename TPath >
void
PathConstIterator< TImage, TPath >
::GoToBegin()
{
// Go the the beginning
m_CurrentPathPosition = m_Path->StartOfInput();
// But don't visit the first index twice for closed paths (unless told to)
if ( m_VisitStartIndexAsLastIndexIfClosed )
{
// Are the first and last indices coincident?
if ( m_Path->EvaluateToIndex( m_Path->EndOfInput() ) ==
m_Path->EvaluateToIndex( m_Path->StartOfInput() ) )
{
// Skip the starting index; we will visit it later.
m_Path->IncrementInput(m_CurrentPathPosition);
}
}
// Update the other member data
m_CurrentImageIndex = m_Path->EvaluateToIndex(m_CurrentPathPosition);
m_IsAtEnd = false;
}
template< typename TImage, typename TPath >
void
PathConstIterator< TImage, TPath >
::operator++()
{
// We need to modify m_CurrentPathPosition, m_CurrentImageIndex, m_IsAtEnd
const OffsetType offset = m_Path->IncrementInput(m_CurrentPathPosition);
if ( m_ZeroOffset == offset )
{
// We tried to go past the end (and we are still there)
m_IsAtEnd = true;
}
else if ( !m_Region.IsInside(m_CurrentImageIndex) )
{
// The new index is outside the acceptable region. We can iterate no
// farther, call this the end. NOTE THAT INPUT IS STILL INCREMENTED.
m_IsAtEnd = true;
itkWarningMacro(<< "Path left region; unable to finish tracing it");
}
else
{
m_CurrentImageIndex += offset;
}
}
} // end namespace itk
#endif
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