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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_h
#define itkSphereSignedDistanceFunction_h
#include "itkShapeSignedDistanceFunction.h"
#include "itkVector.h"
namespace itk
{
/**
* \class SphereSignedDistanceFunction
* \brief Compute the signed distance from a N-dimensional sphere.
*
* A instance of sphere is defined by a set parameters. The first parameter
* is the radius and the next SpaceDimension parameters represent the center.
* The first parameter forms the set of ShapeParameters and the remaining
* parameters the set of PoseParameters.
*
* This class is templated over the coordinate representation type
* (e.g. float or double) and the space dimension.
*
* \sa ShapeSignedDistanceFunction
* \ingroup ImageFunctions
*
*
* \ingroup ITKSignedDistanceFunction
*/
template <typename TCoordRep, unsigned int VSpaceDimension>
class ITK_TEMPLATE_EXPORT SphereSignedDistanceFunction : public ShapeSignedDistanceFunction<TCoordRep, VSpaceDimension>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(SphereSignedDistanceFunction);
/** Standard class type aliases. */
using Self = SphereSignedDistanceFunction;
using Superclass = ShapeSignedDistanceFunction<TCoordRep, VSpaceDimension>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(SphereSignedDistanceFunction);
/** New macro for creation of through the object factory. */
itkNewMacro(Self);
/** OutputType type alias support */
using typename Superclass::OutputType;
/** InputType type alias support */
using typename Superclass::InputType;
/** Dimension underlying input image. */
static constexpr unsigned int SpaceDimension = Superclass::SpaceDimension;
/** CoordRep type alias support */
using typename Superclass::CoordRepType;
/** Point type alias support */
using typename Superclass::PointType;
/** Type of the shape parameters. */
using typename Superclass::ParametersType;
/** A sphere is defined by a set of shape parameters. The first parameter
* is the radius and the next SpaceDimension parameters represent the center. */
void
SetParameters(const ParametersType &) override;
unsigned int
GetNumberOfShapeParameters() const override
{
return 1;
}
unsigned int
GetNumberOfPoseParameters() const override
{
return SpaceDimension;
}
/** Evaluate the signed distance from a shape at a given position. */
OutputType
Evaluate(const PointType & point) const override;
protected:
SphereSignedDistanceFunction();
~SphereSignedDistanceFunction() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
using VectorType = Vector<CoordRepType, Self::SpaceDimension>;
VectorType m_Translation{};
double m_Radius{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkSphereSignedDistanceFunction.hxx"
#endif
#endif
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