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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkImageRegionExclusionConstIteratorWithIndex.txx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:39 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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DEF |
#ifndef _itkImageRegionExclusionConstIteratorWithIndex_txx |
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#define _itkImageRegionExclusionConstIteratorWithIndex_txx |
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#include "itkImageRegionExclusionConstIteratorWithIndex.h" |
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namespace itk |
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{ |
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//---------------------------------------------------------------------- |
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// Set the region to exclude from the walk |
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//---------------------------------------------------------------------- |
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template<class TImage> |
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void |
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ImageRegionExclusionConstIteratorWithIndex<TImage> |
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::SetExclusionRegion( const RegionType & region ) |
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{ |
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if( !this->m_Region.IsInside( region ) ) |
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{ |
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itkGenericExceptionMacro(<< "Attempt to set a exclusion region that is NOT contained inside the iterator region"); |
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} |
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m_ExclusionRegion = region; |
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m_ExclusionBegin = m_ExclusionRegion.GetIndex(); |
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SizeType exclusionSize = m_ExclusionRegion.GetSize(); |
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for(unsigned int i=0; i<TImage::ImageDimension; ++i) |
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{ |
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m_ExclusionEnd[i] = m_ExclusionBegin[i] + exclusionSize[i]; |
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} |
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} |
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//---------------------------------------------------------------------- |
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// Set the region to exclude from the walk to a region that is inset |
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// one pixel from the boundary of the region |
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//---------------------------------------------------------------------- |
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template<class TImage> |
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void |
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ImageRegionExclusionConstIteratorWithIndex<TImage> |
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::SetExclusionRegionToInsetRegion() |
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{ |
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RegionType excludeRegion; |
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excludeRegion = this->m_Region; |
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for (unsigned int i=0; i < TImage::ImageDimension; ++i) |
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{ |
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if ( excludeRegion.GetSize()[i] >= 2 ) |
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{ |
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// region is large enough to inset, adjust size and index |
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excludeRegion.SetSize( i, excludeRegion.GetSize()[i] - 2); |
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excludeRegion.SetIndex( i, excludeRegion.GetIndex()[i] + 1); |
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} |
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else |
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{ |
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// region is not large enough to inset, set exclusion size to |
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// zero and keep the index the same. |
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excludeRegion.SetSize( i, 0 ); |
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} |
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} |
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this->SetExclusionRegion( excludeRegion ); |
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} |
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//---------------------------------------------------------------------- |
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// Advance along the line |
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//---------------------------------------------------------------------- |
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template<class TImage> |
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ImageRegionExclusionConstIteratorWithIndex<TImage> & |
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ImageRegionExclusionConstIteratorWithIndex<TImage> |
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::operator++() |
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{ |
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this->m_Remaining = false; |
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for( unsigned int in=0; in<TImage::ImageDimension; in++ ) |
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{ |
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this->m_PositionIndex[ in ]++; |
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// if entering the exclusion region... jump over it |
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if( m_ExclusionRegion.IsInside( this->m_PositionIndex ) ) |
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{ |
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this->m_PositionIndex[ in ] = m_ExclusionEnd[ in ]; |
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this->m_Position += this->m_OffsetTable[in] * |
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********m_ExclusionRegion.GetSize()[ in ]; |
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} |
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if( this->m_PositionIndex[ in ] < this->m_EndIndex[ in ] ) |
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{ |
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this->m_Position += this->m_OffsetTable[in]; |
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this->m_Remaining = true; |
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break; |
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} |
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else |
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{ |
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this->m_Position -= this->m_OffsetTable[ in ] * ( static_cast<long>(this->m_Region.GetSize()[in])-1 ); |
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this->m_PositionIndex[ in ] = this->m_BeginIndex[ in ]; |
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} |
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} |
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if( !this->m_Remaining ) // It will not advance here otherwise |
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{ |
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this->m_Position = this->m_End; |
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} |
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return *this; |
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} |
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//---------------------------------------------------------------------- |
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// Advance along the line in reverse direction |
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//---------------------------------------------------------------------- |
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template<class TImage> |
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ImageRegionExclusionConstIteratorWithIndex<TImage> & |
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ImageRegionExclusionConstIteratorWithIndex<TImage> |
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::operator--() |
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{ |
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this->m_Remaining = false; |
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for( unsigned int in=0; in<TImage::ImageDimension; in++ ) |
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{ |
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if( this->m_PositionIndex[ in ] > this->m_BeginIndex[ in ] ) |
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{ |
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this->m_PositionIndex[ in ]--; |
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this->m_Position -= this->m_OffsetTable[in]; |
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// if entering the exclusion region... jump over it |
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if( m_ExclusionRegion.IsInside( this->m_PositionIndex ) ) |
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{ |
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this->m_PositionIndex[ in ] = m_ExclusionBegin[ in ]-1; |
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this->m_Position -= this->m_OffsetTable[in] * m_ExclusionRegion.GetSize()[ in ]; |
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} |
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this->m_Remaining = true; |
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break; |
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} |
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else |
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{ |
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this->m_PositionIndex[ in ]--; |
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this->m_Position += this->m_OffsetTable[ in ] * ( static_cast<long>(this->m_Region.GetSize()[in])-1 ); |
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this->m_PositionIndex[ in ] = this->m_EndIndex[ in ] - 1; |
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} |
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} |
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if( !this->m_Remaining ) // It will not advance here otherwise |
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{ |
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this->m_Position = this->m_End; |
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} |
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return *this; |
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} |
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} // end namespace itk |
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#endif |
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