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itkNumericTraitsCovariantVectorPixel.h
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/
itkNumericTraitsCovariantVectorPixel.h
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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.
*
*=========================================================================*/
#ifndef itkNumericTraitsCovariantVectorPixel_h
#define itkNumericTraitsCovariantVectorPixel_h
#include "itkNumericTraits.h"
#include "itkCovariantVector.h"
namespace itk
{
/**
* \brief Define numeric traits for CovariantVector.
* \tparam T Component type of CovariantVector
* \tparam D Dimension of the CovariantVector
*
* We provide here a generic implementation based on creating types of
* CovariantVector whose components are the types of the NumericTraits from
* the original CovariantVector components. This implementation require
* support for partial specializations, since it is based on the
* concept that:
* NumericTraits<CovariantVector<T,D>> is defined piecewise by
* CovariantVector<NumericTraits<T>>
*
* \sa NumericTraits
* \ingroup DataRepresentation
* \ingroup ITKCommon
*/
template <typename T, unsigned int D>
class NumericTraits<CovariantVector<T, D>>
{
private:
using ElementAbsType = typename NumericTraits<T>::AbsType;
using ElementAccumulateType = typename NumericTraits<T>::AccumulateType;
using ElementFloatType = typename NumericTraits<T>::FloatType;
using ElementPrintType = typename NumericTraits<T>::PrintType;
using ElementRealType = typename NumericTraits<T>::RealType;
public:
/** Return the type of the native component type. */
using ValueType = T;
using Self = CovariantVector<T, D>;
/** Unsigned component type */
using AbsType = CovariantVector<ElementAbsType, D>;
/** Accumulation of addition and multiplication. */
using AccumulateType = CovariantVector<ElementAccumulateType, D>;
/** Typedef for operations that use floating point instead of real precision
*/
using FloatType = CovariantVector<ElementFloatType, D>;
/** Return the type that can be printed. */
using PrintType = CovariantVector<ElementPrintType, D>;
/** Type for real-valued scalar operations. */
using RealType = CovariantVector<ElementRealType, D>;
/** Type for real-valued scalar operations. */
using ScalarRealType = ElementRealType;
/** Measurement vector type */
using MeasurementVectorType = Self;
/** Component wise defined element
*
* \note minimum value for floating pointer types is defined as
* minimum positive normalize value.
*/
static const Self
max(const Self &)
{
return MakeFilled<Self>(NumericTraits<T>::max());
}
static const Self
min(const Self &)
{
return MakeFilled<Self>(NumericTraits<T>::min());
}
static const Self
max()
{
return MakeFilled<Self>(NumericTraits<T>::max());
}
static const Self
min()
{
return MakeFilled<Self>(NumericTraits<T>::min());
}
static const Self
NonpositiveMin()
{
return MakeFilled<Self>(NumericTraits<T>::NonpositiveMin());
}
static const Self
ZeroValue()
{
return MakeFilled<Self>(NumericTraits<T>::ZeroValue());
}
static const Self
OneValue()
{
return MakeFilled<Self>(NumericTraits<T>::OneValue());
}
static const Self
NonpositiveMin(const Self &)
{
return NonpositiveMin();
}
static const Self
ZeroValue(const Self &)
{
return ZeroValue();
}
static const Self
OneValue(const Self &)
{
return OneValue();
}
static constexpr bool IsSigned = std::is_signed_v<ValueType>;
static constexpr bool IsInteger = std::is_integral_v<ValueType>;
static constexpr bool IsComplex = NumericTraits<ValueType>::IsComplex;
/** Fixed length vectors cannot be resized, so an exception will
* be thrown if the input size is not valid. If the size is valid
* the vector will be filled with zeros. */
static void
SetLength(CovariantVector<T, D> & m, const unsigned int s)
{
if (s != D)
{
itkGenericExceptionMacro("Cannot set the size of a CovariantVector of length " << D << " to " << s);
}
m.Fill(NumericTraits<T>::ZeroValue());
}
/** Return the length of the vector. */
static unsigned int
GetLength(const CovariantVector<T, D> &)
{
return D;
}
/** Return the length of the vector. */
static unsigned int
GetLength()
{
return D;
}
static void
AssignToArray(const Self & v, MeasurementVectorType & mv)
{
mv = v;
}
template <typename TArray>
static void
AssignToArray(const Self & v, TArray & mv)
{
for (unsigned int i = 0; i < D; ++i)
{
mv[i] = v[i];
}
}
/** \note: the functions are preferred over the member variables as
* they are defined for all partial specialization
*/
static const Self ITKCommon_EXPORT Zero;
static const Self ITKCommon_EXPORT One;
};
} // end namespace itk
#endif // itkNumericTraitsCovariantVectorPixel_h