ITK  5.3.0
Insight Toolkit
itkCrossHelper.h
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1 /*=========================================================================
2  *
3  * Copyright NumFOCUS
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
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13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
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16  *
17  *=========================================================================*/
18 #ifndef itkCrossHelper_h
19 #define itkCrossHelper_h
20 
21 #include "itkNumericTraits.h"
22 
23 namespace itk
24 {
35 template <typename TVector>
37 {
38 public:
39  using VectorType = TVector;
40  using ValueType = typename VectorType::ValueType;
41 
42  static constexpr unsigned int Dimension = VectorType::Dimension;
43 
50  operator()(const VectorType & iU, const VectorType & iV) const
51  {
52  VectorType oCross;
53 
54  if (Dimension > 2)
55  {
56  oCross[0] = iU[1] * iV[2] - iV[1] * iU[2];
57  oCross[1] = iV[0] * iU[2] - iU[0] * iV[2];
58  oCross[2] = iU[0] * iV[1] - iV[0] * iU[1];
59 
60  if (Dimension > 3)
61  {
62  for (unsigned int dim = 3; dim < Dimension; ++dim)
63  {
64  oCross[dim] = 0.0;
65  }
66  }
67  }
68  else
69  {
70  oCross.Fill(0.);
71  }
72 
73  return oCross;
74  }
75 };
76 } // namespace itk
77 
78 #endif
itk::CrossHelper::Dimension
static constexpr unsigned int Dimension
Definition: itkCrossHelper.h:42
itk::CrossHelper
Definition: itkCrossHelper.h:36
itk::CrossHelper::ValueType
typename VectorType::ValueType ValueType
Definition: itkCrossHelper.h:40
itk::CrossHelper::operator()
VectorType operator()(const VectorType &iU, const VectorType &iV) const
Definition: itkCrossHelper.h:50
itk
The "itk" namespace contains all Insight Segmentation and Registration Toolkit (ITK) classes....
Definition: itkAnnulusOperator.h:24
itk::CrossHelper::VectorType
TVector VectorType
Definition: itkCrossHelper.h:39
itkNumericTraits.h
itk::GTest::TypedefsAndConstructors::Dimension2::Dimension
constexpr unsigned int Dimension
Definition: itkGTestTypedefsAndConstructors.h:44