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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 itkSphereSignedDistanceFunction_hxx
#define itkSphereSignedDistanceFunction_hxx
#include "itkMath.h"
namespace itk
{
// Constructor with default arguments
template <typename TCoordRep, unsigned int VSpaceDimension>
SphereSignedDistanceFunction<TCoordRep, VSpaceDimension>::SphereSignedDistanceFunction()
{
this->GetParameters().SetSize(SpaceDimension + 1);
this->GetParameters().Fill(0.0);
this->GetParameters()[0] = 1.0;
m_Translation.Fill(0.0);
m_Radius = 1.0;
}
// Set the parameters
template <typename TCoordRep, unsigned int VSpaceDimension>
void
SphereSignedDistanceFunction<TCoordRep, VSpaceDimension>::SetParameters(const ParametersType & parameters)
{
if (parameters != this->GetParameters())
{
this->m_Parameters = parameters;
m_Radius = parameters[0];
for (unsigned int i = 0; i < SpaceDimension; ++i)
{
m_Translation[i] = parameters[i + 1];
}
this->Modified();
}
}
// Print self
template <typename TCoordRep, unsigned int VSpaceDimension>
void
SphereSignedDistanceFunction<TCoordRep, VSpaceDimension>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Translation: " << m_Translation << std::endl;
os << indent << "Radius: " << m_Radius << std::endl;
}
// Evaluate the signed distance
template <typename TCoordRep, unsigned int VSpaceDimension>
auto
SphereSignedDistanceFunction<TCoordRep, VSpaceDimension>::Evaluate(const PointType & point) const -> OutputType
{
using RealType = typename NumericTraits<OutputType>::RealType;
RealType output = 0.0;
for (unsigned int j = 0; j < SpaceDimension; ++j)
{
output += itk::Math::sqr((point[j] - m_Translation[j]));
}
output = std::sqrt(output) - m_Radius;
return output;
}
} // end namespace itk
#endif
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