itkSpecialFunctions.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
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 *=========================================================================*/
#ifndef itkSpecialFunctions_h
#define itkSpecialFunctions_h
 
#include "itk_eigen.h"
#include ITK_EIGEN_UNSUPPORTED(SpecialFunctions)
#include <type_traits>
 
namespace itk
{
namespace Math
{

template <typename TReal>
TReal
IncompleteGammaP(TReal a, TReal x)
{
  static_assert(std::is_floating_point_v<TReal>, "IncompleteGammaP requires a floating-point type");
  return Eigen::numext::igamma(a, x);
}

template <typename TReal>
TReal
RegularizedIncompleteBeta(TReal a, TReal b, TReal x)
{
  static_assert(std::is_floating_point_v<TReal>, "RegularizedIncompleteBeta requires a floating-point type");
  return Eigen::numext::betainc(a, b, x);
}
 
} // namespace Math
} // namespace itk
 
#endif // itkSpecialFunctions_h