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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
/*
This tests the classes ImageRandomNonRepeatingIteratorWithIndex and
ImageRandomNonRepeatingConstIteratorWithIndex. This was contributed
by Rupert Brooks, McGill Centre for Intelligent
Machines, Montreal, Canada. It is heavily based on the
ImageRandomIterator test program.
*/
#include <iostream>
#include "itkImageRandomNonRepeatingConstIteratorWithIndex.h"
int
itkImageRandomNonRepeatingIteratorWithIndexTest2(int, char *[])
{
constexpr unsigned int ImageDimension = 2;
using PixelType = itk::Index<ImageDimension>;
using ImageType = itk::Image<PixelType, ImageDimension>;
using RandomConstIteratorType = itk::ImageRandomNonRepeatingConstIteratorWithIndex<ImageType>;
constexpr unsigned long N = 10;
constexpr int Seed = 42;
ImageType::SizeType size;
size.Fill(N);
ImageType::IndexType start;
start.Fill(0);
ImageType::RegionType region{ start, size };
auto myImage = ImageType::New();
myImage->SetRegions(region);
myImage->Allocate();
using WalkType = std::vector<ImageType::IndexType>;
using WalkIteratorType = WalkType::iterator;
WalkType firstWalk(N);
RandomConstIteratorType firstIt(myImage, region);
firstIt.ReinitializeSeed(Seed);
firstIt.SetNumberOfSamples(region.GetNumberOfPixels());
for (firstIt.GoToBegin(); !firstIt.IsAtEnd(); ++firstIt)
{
firstWalk.push_back(firstIt.GetIndex());
}
WalkType secondWalk(N);
RandomConstIteratorType secondIt(myImage, region);
secondIt.ReinitializeSeed(Seed);
secondIt.SetNumberOfSamples(region.GetNumberOfPixels());
for (secondIt.GoToBegin(); !secondIt.IsAtEnd(); ++secondIt)
{
secondWalk.push_back(secondIt.GetIndex());
}
std::pair<WalkIteratorType, WalkIteratorType> mismatchTest;
mismatchTest = std::mismatch(firstWalk.begin(), firstWalk.end(), secondWalk.begin());
if (mismatchTest.first != firstWalk.end())
{
std::cerr << "Two iterations with the same seed do not"
<< " walk over the same pixels" << std::endl
<< "First mismatch found after " << mismatchTest.first - firstWalk.begin() << " iterations." << std::endl
<< "First walk index : " << *(mismatchTest.first) << std::endl
<< "Second walk index : " << *(mismatchTest.second) << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed" << std::endl;
return EXIT_SUCCESS;
}
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