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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 itkHeavisideStepFunction_hxx
#define itkHeavisideStepFunction_hxx
#include "itkMath.h"
namespace itk
{
template <typename TInput, typename TOutput>
auto
HeavisideStepFunction<TInput, TOutput>::Evaluate(const InputType & input) const -> OutputType
{
return (input >= InputType{}) ? NumericTraits<OutputType>::OneValue() : OutputType{};
}
template <typename TInput, typename TOutput>
auto
HeavisideStepFunction<TInput, TOutput>::EvaluateDerivative(const InputType & input) const -> OutputType
{
return (Math::ExactlyEquals(input, InputType{})) ? NumericTraits<OutputType>::OneValue() : OutputType{};
}
} // namespace itk
#endif // itkHeavisideStepFunction_hxx
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