text: /*=========================================================================
   *
   *  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.
   *
   *=========================================================================*/
  #include "itkImage.h"
  #include "itkAddImageFilter.h"
  #include "itkTestingMacros.h"
  
  int
  itkImageToImageToleranceTest(int, char *[])
  {
    using ImageType = itk::Image<unsigned char, 3>;
  
    ImageType::Pointer image1 = ImageType::New();
    ImageType::Pointer image2 = ImageType::New();
  
    ImageType::SizeType size = { { 3, 3, 3 } };
    image1->SetRegions(size);
    image1->Allocate();
    image1->FillBuffer(1);
    image2->SetRegions(size);
    image2->Allocate();
    image2->FillBuffer(2);
  
    ImageType::PointType origin;
    origin[0] = 1.0;
    origin[1] = 1.0;
    origin[2] = 1.0;
    image1->SetOrigin(origin);
    origin[0] += 1.0E-5;
    image2->SetOrigin(origin);
  
    // test coordinate tolerance
  
    using AddImageFilterType = itk::AddImageFilter<ImageType, ImageType, ImageType>;
  
    AddImageFilterType::Pointer addImageFilter = AddImageFilterType::New();
    addImageFilter->SetInput1(image1);
    addImageFilter->SetInput2(image2);
    bool exceptCaught = false;
    try
    {
      addImageFilter->Update();
    }
    catch (itk::ExceptionObject & e)
    {
      exceptCaught = true;
      std::cout << "Expected exception:" << std::endl << e << std::endl;
    }
    if (!exceptCaught)
    {
      std::cerr << "Expected exception not caught" << std::endl;
      return EXIT_FAILURE;
    }
    addImageFilter = AddImageFilterType::New();
    addImageFilter->SetCoordinateTolerance(1.0E-4);
    std::cerr << addImageFilter << std::endl;
    addImageFilter->SetInput1(image1);
    addImageFilter->SetInput2(image2);
    exceptCaught = false;
    try
    {
      addImageFilter->Update();
    }
    catch (itk::ExceptionObject & e)
    {
      exceptCaught = true;
      std::cout << "Unexpected exception:" << std::endl << e << std::endl;
      return EXIT_FAILURE;
    }
  
    origin[0] = 1.0;
    image2->SetOrigin(origin);
  
    ImageType::DirectionType dir;
    dir.SetIdentity();
    image1->SetDirection(dir);
    dir[0][0] += 10.0E-5;
    image2->SetDirection(dir);
  
    addImageFilter = AddImageFilterType::New();
    addImageFilter->SetInput1(image1);
    addImageFilter->SetInput2(image2);
    exceptCaught = false;
    try
    {
      addImageFilter->Update();
    }
    catch (itk::ExceptionObject & e)
    {
      exceptCaught = true;
      std::cout << "Expected exception:" << std::endl << e << std::endl;
    }
    if (!exceptCaught)
    {
      std::cerr << "Expected exception not caught" << std::endl;
      return EXIT_FAILURE;
    }
  
    addImageFilter = AddImageFilterType::New();
    addImageFilter->SetDirectionTolerance(1.0E-4);
    addImageFilter->SetInput1(image1);
    addImageFilter->SetInput2(image2);
    exceptCaught = false;
    try
    {
      addImageFilter->Update();
    }
    catch (itk::ExceptionObject & e)
    {
      exceptCaught = true;
      std::cout << "Unexpected exception:" << std::endl << e << std::endl;
      return EXIT_FAILURE;
    }
  
    // test global defaults
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultCoordinateTolerance(), 1.0e-6);
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultDirectionTolerance(), 1.0e-6);
  
    addImageFilter = AddImageFilterType::New();
    ITK_TEST_EXPECT_EQUAL(addImageFilter->GetCoordinateTolerance(), 1.0e-6);
    ITK_TEST_EXPECT_EQUAL(addImageFilter->GetDirectionTolerance(), 1.0e-6);
  
    AddImageFilterType::SetGlobalDefaultCoordinateTolerance(1.0e-4);
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultCoordinateTolerance(), 1.0e-4);
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultDirectionTolerance(), 1.0e-6);
  
    itk::ImageToImageFilterCommon::SetGlobalDefaultDirectionTolerance(1.0e-5);
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultCoordinateTolerance(), 1.0e-4);
    ITK_TEST_EXPECT_EQUAL(AddImageFilterType::GetGlobalDefaultDirectionTolerance(), 1.0e-5);
  
    addImageFilter = AddImageFilterType::New();
    ITK_TEST_EXPECT_EQUAL(addImageFilter->GetCoordinateTolerance(), 1.0e-4);
    ITK_TEST_EXPECT_EQUAL(addImageFilter->GetDirectionTolerance(), 1.0e-5);
  
    return EXIT_SUCCESS;
  }
  