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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkImageIteratorsForwardBackwardTest.cxx,v $
Language: C++
Date: $Date: 2003-09-10 14:30:09 $
Version: $Revision: 1.14 $
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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include "itkImage.h"
#include "itkNumericTraits.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkImageRegionConstIteratorWithIndex.h"
int itkImageIteratorsForwardBackwardTest(int, char* [] )
{
std::cout << "Creating an image" << std::endl;
typedef itk::Image<unsigned short,3> ImageType;
ImageType::Pointer myImage = ImageType::New();
ImageType::SizeType size;
size[0] = 4;
size[1] = 4;
size[2] = 4;
ImageType::IndexType start;
start.Fill(0);
ImageType::RegionType region;
region.SetIndex( start );
region.SetSize( size );
myImage->SetLargestPossibleRegion( region );
myImage->SetBufferedRegion( region );
myImage->SetRequestedRegion( region );
myImage->Allocate();
typedef itk::ImageRegionIteratorWithIndex< ImageType > IteratorType;
typedef itk::ImageRegionConstIteratorWithIndex< ImageType > ConstIteratorType;
IteratorType it( myImage, region );
ImageType::PixelType value;
value = itk::NumericTraits< ImageType::PixelType >::Zero;
// Store information on the Image
std::cout << "Storing data on the image ... " << std::endl;
while( !it.IsAtEnd() )
{
value++;
it.Set( value );
++it;
}
// Verification
IteratorType ot( myImage, region );
std::cout << "Verifying the data forwards... ";
value = itk::NumericTraits< ImageType::PixelType >::Zero;
while( !ot.IsAtEnd() )
{
value++;
if( ot.Get() != value )
{
std::cerr << "Error in forward pass" << std::endl;
std::cerr << "Values don't correspond to what was stored "
<< std::endl;
std::cerr << "Test failed at index ";
std::cerr << ot.GetIndex() << std::endl;
std::cerr << "Value stored is = " << ot.Get() << std::endl;
std::cerr << "Value should be = " << value << std::endl;
return EXIT_FAILURE;
}
++ot;
}
std::cout << " PASSED !" << std::endl;
// Verification
std::cout << "Verifying the data backwards... ";
ot.GoToReverseBegin();
--ot;
--value;
while( !ot.IsAtReverseEnd() )
{
if( ot.Get() != value )
{
std::cerr << "Error in backwards pass" << std::endl;
std::cerr << "Values don't correspond to what was stored "
<< std::endl;
std::cerr << "Test failed at index ";
std::cerr << ot.GetIndex() << std::endl;
std::cerr << "Value stored is = " << ot.Get() << std::endl;
std::cerr << "Value should be = " << value << std::endl;
return EXIT_FAILURE;
}
value--;
--ot;
}
std::cout << " PASSED !" << std::endl;
// Verification
ConstIteratorType cot( myImage, region );
std::cout << "Const Iterator: Verifying the data forwards... ";
value = itk::NumericTraits< ImageType::PixelType >::Zero;
while( !cot.IsAtEnd() )
{
value++;
if( cot.Get() != value )
{
std::cerr << "Error in forward pass" << std::endl;
std::cerr << "Values don't correspond to what was stored "
<< std::endl;
std::cerr << "Test failed at index ";
std::cerr << cot.GetIndex() << std::endl;
std::cerr << "Value stored is = " << cot.Get() << std::endl;
std::cerr << "Value should be = " << value << std::endl;
return EXIT_FAILURE;
}
++cot;
}
std::cout << " PASSED !" << std::endl;
// Verification
std::cout << "Const Iterator : Verifying the data backwards... ";
cot.GoToReverseBegin();
--cot;
--value;
while( !cot.IsAtReverseEnd() )
{
if( cot.Get() != value )
{
std::cerr << "Error in backwards pass" << std::endl;
std::cerr << "Values don't correspond to what was stored "
<< std::endl;
std::cerr << "Test failed at index ";
std::cerr << cot.GetIndex() << std::endl;
std::cerr << "Value stored is = " << cot.Get() << std::endl;
std::cerr << "Value should be = " << value << std::endl;
return EXIT_FAILURE;
}
value--;
--cot;
}
std::cout << " PASSED !" << std::endl;
std::cout << std::endl << "Test passed" << std::endl;
return EXIT_SUCCESS;
}
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