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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkPathIteratorTest.cxx
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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include <math.h>
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkPolyLineParametricPath.h"
#include "itkPathIterator.h"
int itkPathIteratorTest(int, char*[])
{
typedef itk::Image<double, 2> ImageType;
typedef itk::PolyLineParametricPath<2> PathType;
typedef itk::PathIterator< ImageType, PathType > IterType;
typedef ImageType::IndexType IndexType;
typedef PathType::InputType PathInputType;
typedef PathType::VertexType VertexType;
typedef PathType::OffsetType OffsetType;
bool passed = true;
// Setup the image
std::cout << "Making a 64x64 white square centered in a 128x128 black image"<<std::endl;
ImageType::Pointer image = ImageType::New();
IndexType start;
start[0]=0;
start[1]=0;
ImageType::SizeType size;
size[0]=128;
size[1]=128;
ImageType::RegionType region;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
double spacing[ ImageType::ImageDimension ];
spacing[0]=1.0;
spacing[1]=1.0;
image->SetSpacing(spacing);
image->Allocate();
typedef itk::ImageRegionIterator<ImageType> ImageItType;
ImageItType it( image, image->GetRequestedRegion() );
it.GoToBegin();
ImageType::PixelType storedValue;
IndexType pixelIndex;
while( !it.IsAtEnd() )
{
pixelIndex = it.GetIndex();
if( pixelIndex[0] >= int(size[0]/4) && pixelIndex[0] < int(size[0]*3/4) &&
pixelIndex[1] >= int(size[1]/4) && pixelIndex[1] < int(size[1]*3/4) )
{
it.Set(1.0);
}
else
{
it.Set(0.0);
}
++it;
}
// Retrieve and print the value stored at pixel index (32,32)
pixelIndex[0]=32;
pixelIndex[1]=32;
storedValue = image->GetPixel(pixelIndex);
std::cout << "The pixel at index (" << pixelIndex[0] << "," << pixelIndex[1]
<< ") has the value " << storedValue << ".\n" << std::endl;
// Setup the path
std::cout << "Making a square Path with v0 at (30,30) and v2 at (33,33)" << std::endl;
VertexType v;
PathType::Pointer path = PathType::New();
v.Fill(30);
path->AddVertex(v);
v[0]=33;
v[1]=30;
path->AddVertex(v);
v.Fill(33);
path->AddVertex(v);
v[0]=30;
v[1]=33;
path->AddVertex(v);
v.Fill(30);
path->AddVertex(v);
// Test the iterator
std::cout << "Creating an iterator to trace the PolyLineParametricPath" << std::endl;
IterType iter(image, path);
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "
<< iter.Get()<<"; Now inverting."<<std::endl;
iter.Set( 1.0 - iter.Get() );
}
if( int(.5+1000*iter.Get()) != 1000 )
{
std::cout << "PathIteratorTest: Set() Failed" << std::endl;
passed = false;
}
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "
<< iter.Get()<<std::endl;
}
std::cout << "Should still be at end: ";
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "<<
iter.Get()<<std::endl;
if( (iter.GetIndex())[0] != 30 || (iter.GetIndex())[1] != 30 )
{
std::cout << "PathIteratorTest: Failed to iterate over a closed loop" << std::endl;
passed = false;
}
if (passed)
{
std::cout << "PathIterator tests passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "PathIterator tests failed" << std::endl;
return EXIT_FAILURE;
}
}
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