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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.
*
*=========================================================================*/
#include <iostream>
#include "itkIdentityTransform.h"
#include "itkTestingMacros.h"
int
itkIdentityTransformTest(int, char *[])
{
std::cout << "==================================" << std::endl;
std::cout << "Testing Identity Transform " << std::endl << std::endl;
const double epsilon = 1e-10;
constexpr unsigned int N = 2;
bool Ok = true;
using IdentityTransformType = itk::IdentityTransform<double>;
auto transform = IdentityTransformType::New();
std::cout << "FixedParameters: " << transform->GetFixedParameters() << std::endl;
std::cout << "Testing TransformPoint: ";
IdentityTransformType::InputPointType p(10);
IdentityTransformType::OutputPointType r;
r = transform->TransformPoint(p);
for (unsigned int i = 0; i < N; ++i)
{
if (itk::Math::abs(p[i] - r[i]) > epsilon)
{
Ok = false;
break;
}
}
if (!Ok)
{
std::cerr << "Error Transforming Point" << std::endl;
return EXIT_FAILURE;
}
else
{
std::cout << " [ PASSED ] " << std::endl;
}
// Test TransformVector
std::cout << "Testing TransformVector: ";
IdentityTransformType::InputVectorType vin;
vin[0] = 1;
vin[1] = 2;
IdentityTransformType::OutputVectorType vout;
vout = transform->TransformVector(vin);
for (unsigned int i = 0; i < N; ++i)
{
if (itk::Math::abs(vout[i] - vin[i]) > epsilon)
{
Ok = false;
break;
}
}
if (!Ok)
{
std::cerr << "Error with TransformVector itk::Vector" << std::endl;
return EXIT_FAILURE;
}
else
{
std::cout << " [ PASSED ] " << std::endl;
}
// Test TransformVector vnl_vector
std::cout << "Testing TransformVector (vnl): ";
IdentityTransformType::InputVnlVectorType vnlin;
vnlin[0] = 1;
vnlin[1] = 2;
IdentityTransformType::OutputVnlVectorType vnlout;
vnlout = transform->TransformVector(vnlin);
for (unsigned int i = 0; i < N; ++i)
{
if (itk::Math::abs(vnlout[i] - vnlin[i]) > epsilon)
{
Ok = false;
break;
}
}
if (!Ok)
{
std::cerr << "Error with TransformVector vnlVector" << std::endl;
return EXIT_FAILURE;
}
else
{
std::cout << " [ PASSED ] " << std::endl;
}
// Test TransformCovariantVector
std::cout << "Testing TransformCovariantVector: ";
IdentityTransformType::InputCovariantVectorType vcin;
vcin[0] = 1;
vcin[1] = 2;
IdentityTransformType::OutputCovariantVectorType vcout;
vcout = transform->TransformCovariantVector(vcin);
for (unsigned int i = 0; i < N; ++i)
{
if (itk::Math::abs(vcout[i] - vcin[i]) > epsilon)
{
Ok = false;
break;
}
}
if (!Ok)
{
std::cerr << "Error with TransformVector CovariantVector" << std::endl;
return EXIT_FAILURE;
}
else
{
std::cout << " [ PASSED ] " << std::endl;
}
IdentityTransformType::ParametersType params(0);
transform->SetParameters(params);
ITK_TEST_SET_GET_VALUE(params, transform->GetParameters());
// The number of parameters is 0 for the indentity transformation
ITK_TEST_SET_GET_VALUE(0, transform->GetNumberOfParameters());
// Testing the Jacobian
std::cout << "Testing Jacobian: ";
IdentityTransformType::JacobianType jacobian;
transform->ComputeJacobianWithRespectToParameters(p, jacobian);
if (jacobian.rows() != 3 || jacobian.columns() != 0)
{
std::cerr << "Error with Jacobian: " << jacobian << std::endl;
return EXIT_FAILURE;
}
else
{
std::cout << " [ PASSED ] " << std::endl;
}
IdentityTransformType::JacobianPositionType jacobianWrtPos;
transform->ComputeJacobianWithRespectToPosition(p, jacobianWrtPos);
IdentityTransformType::JacobianPositionType identity;
identity.set_identity();
ITK_TEST_EXPECT_EQUAL(identity, jacobianWrtPos);
auto inv = IdentityTransformType::New();
ITK_TEST_EXPECT_TRUE(transform->GetInverse(inv));
ITK_TEST_EXPECT_TRUE(!transform->GetInverse(nullptr));
return EXIT_SUCCESS;
}
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