ITK  5.3.0
Insight Toolkit
SphinxExamples/src/Core/Common/CovariantVectorNorm/Code.cxx
/*=========================================================================
*
* 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
*
* 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.
*
*=========================================================================*/
int
main(int, char *[])
{
v[0] = 1.0;
v[1] = 2.0;
v[2] = 3.0;
std::cout << "v: " << v << std::endl;
// norm
VectorType::RealValueType vnorm = v.GetNorm();
std::cout << "vnorm: " << vnorm << std::endl;
VectorType::RealValueType vnorm2 = v.GetSquaredNorm();
std::cout << "vnorm2: " << vnorm2 << std::endl;
VectorType u = v;
// normalization
v.Normalize();
std::cout << "v: " << v << std::endl;
// another way to normalize
if (vnorm != 0.)
{
for (unsigned int i = 0; i < u.GetNumberOfComponents(); i++)
{
u[i] /= vnorm;
}
}
std::cout << "u: " << u << std::endl;
if ((u - v).GetNorm() != 0.)
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
itkCovariantVector.h
itk::GTest::TypedefsAndConstructors::Dimension2::VectorType
ImageBaseType::SpacingType VectorType
Definition: itkGTestTypedefsAndConstructors.h:53
itk::Vector::GetNorm
RealValueType GetNorm() const
itk::CovariantVector< double, 3 >
itk::Vector::Normalize
RealValueType Normalize()