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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 itkVolumeSplineKernelTransform_hxx
#define itkVolumeSplineKernelTransform_hxx
namespace itk
{
template <typename TParametersValueType, unsigned int VDimension>
void
VolumeSplineKernelTransform<TParametersValueType, VDimension>::ComputeG(const InputVectorType & x,
GMatrixType & gmatrix) const
{
const TParametersValueType r = x.GetNorm();
gmatrix.fill(TParametersValueType{});
const TParametersValueType r3 = r * r * r;
for (unsigned int i = 0; i < VDimension; ++i)
{
gmatrix[i][i] = r3;
}
}
template <typename TParametersValueType, unsigned int VDimension>
void
VolumeSplineKernelTransform<TParametersValueType, VDimension>::ComputeDeformationContribution(
const InputPointType & thisPoint,
OutputPointType & result) const
{
unsigned long numberOfLandmarks = this->m_SourceLandmarks->GetNumberOfPoints();
PointsIterator sp = this->m_SourceLandmarks->GetPoints()->Begin();
for (unsigned int lnd = 0; lnd < numberOfLandmarks; ++lnd)
{
InputVectorType position = thisPoint - sp->Value();
const TParametersValueType r = position.GetNorm();
const TParametersValueType r3 = r * r * r;
for (unsigned int odim = 0; odim < VDimension; ++odim)
{
result[odim] += r3 * this->m_DMatrix(odim, lnd);
}
++sp;
}
}
} // namespace itk
#endif
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