/*=========================================================================
 *
 *  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 itkForwardDifferenceOperator_hxx
#define itkForwardDifferenceOperator_hxx

#include "itkNumericTraits.h"

namespace itk
{
template <typename TPixel, unsigned int VDimension, typename TAllocator>
auto
ForwardDifferenceOperator<TPixel, VDimension, TAllocator>::GenerateCoefficients() -> CoefficientVector
{
  CoefficientVector coeff(3);

  coeff[0] = PixelType{};
  coeff[1] = -1.0 * NumericTraits<PixelType>::OneValue();
  coeff[2] = NumericTraits<PixelType>::OneValue();

  return coeff;
}
} // namespace itk

#endif
