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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 itkSymmetricEllipsoidInteriorExteriorSpatialFunction_h
#define itkSymmetricEllipsoidInteriorExteriorSpatialFunction_h
#include "itkInteriorExteriorSpatialFunction.h"
namespace itk
{
/** \class SymmetricEllipsoidInteriorExteriorSpatialFunction
* \brief Function implementation of an ellipsoid
*
* Similar to EllipsoidInteriorExteriorSpatialFunction in that it
* implements a function that returns 1 for points inside or on the surface
* of a ellipsoid and 0 for points outside the ellipsoid. However, this
* ellipsoid is defined by a single orientation vector and deals
* only with symmetric ellipsoids. An n-dimensional symmetric ellipsoid
* is one which has m axes of equal length and (n - m) unique axes lengths.
* Specifically, this class deals with the case where (n - m) = 1 and
* the ellipsoid's major axis is oriented along a singles orientation vector.
* \ingroup ITKCommon
*/
template <unsigned int VDimension = 3, typename TInput = Point<double, VDimension>>
class ITK_TEMPLATE_EXPORT SymmetricEllipsoidInteriorExteriorSpatialFunction
: public InteriorExteriorSpatialFunction<VDimension, TInput>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(SymmetricEllipsoidInteriorExteriorSpatialFunction);
/** Standard class type aliases. */
using Self = SymmetricEllipsoidInteriorExteriorSpatialFunction;
using Superclass = InteriorExteriorSpatialFunction<VDimension>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using VectorType = Vector<double, VDimension>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(SymmetricEllipsoidInteriorExteriorSpatialFunction);
/** Input type for the function. */
using typename Superclass::InputType;
/** Output type for the function. */
using typename Superclass::OutputType;
/** Evaluates the function at a given position. */
OutputType
Evaluate(const InputType & position) const override;
/** Get and set the center of the ellipsoid. */
itkGetConstMacro(Center, InputType);
itkSetMacro(Center, InputType);
/** Set the orientation vector of the ellipsoid's unique axis and axes lengths.
* Must be normalized!!!!! */
void
SetOrientation(VectorType orientation, double uniqueAxis, double symmetricAxes);
protected:
SymmetricEllipsoidInteriorExteriorSpatialFunction();
~SymmetricEllipsoidInteriorExteriorSpatialFunction() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
/** The center of the ellipsoid. */
InputType m_Center{};
/** The unique axis length of the ellipsoid. */
double m_UniqueAxis{ 10 };
/** The symmetric axes lengths of the ellipsoid. */
double m_SymmetricAxes{ 5 };
/** The orientation vector of the ellipsoid's unique axis. */
Vector<double, VDimension> m_Orientation{};
/** The vector ratio. */
double m_VectorRatio{ 0.0 };
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkSymmetricEllipsoidInteriorExteriorSpatialFunction.hxx"
#endif
#endif
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