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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 itkEllipsoidInteriorExteriorSpatialFunction_h
#define itkEllipsoidInteriorExteriorSpatialFunction_h
#include "itkInteriorExteriorSpatialFunction.h"
#include "vnl/vnl_matrix_fixed.h"
namespace itk
{
/**
* \class EllipsoidInteriorExteriorSpatialFunction
* \brief Function implementation of an ellipsoid
*
* Implements a function that returns 1 for points inside or on the
* surface of a ellipsoid and 0 for points outside the ellipsoid. The
* orientation of the n-dimensional ellipsoid axes are defined by n
* orthogonal vectors. See
* Examples/EllipsoidInteriorExteriorSpatialFunction/README for an
* example of creating an Ellipsoid in an image.
* \ingroup ITKCommon
*/
template <unsigned int VDimension = 3, typename TInput = Point<double, VDimension>>
class ITK_TEMPLATE_EXPORT EllipsoidInteriorExteriorSpatialFunction
: public InteriorExteriorSpatialFunction<VDimension, TInput>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(EllipsoidInteriorExteriorSpatialFunction);
/** Standard class type aliases. */
using Self = EllipsoidInteriorExteriorSpatialFunction;
using Superclass = InteriorExteriorSpatialFunction<VDimension, TInput>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(EllipsoidInteriorExteriorSpatialFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Input type for the function */
using typename Superclass::InputType;
/** Output type for the function */
using typename Superclass::OutputType;
/** Typedef for the orientation matrix */
using OrientationType = vnl_matrix_fixed<double, VDimension, VDimension>;
/** Set/Get and set the center of the ellipsoid. */
itkGetConstMacro(Center, InputType);
itkSetMacro(Center, InputType);
/** Get and set the axes lengths of the ellipsoid. */
itkGetConstMacro(Axes, InputType);
itkSetMacro(Axes, InputType);
/** Set the orientation vectors (must be orthogonal) of the ellipsoid axes.
* Must be normalized!!!!! */
void
SetOrientations(const OrientationType &);
/** Evaluates the function at a given position. */
OutputType
Evaluate(const InputType & position) const override;
protected:
EllipsoidInteriorExteriorSpatialFunction() = default;
~EllipsoidInteriorExteriorSpatialFunction() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
/** The center of the ellipsoid. */
InputType m_Center{};
/** The axes lengths of the ellipsoid. */
InputType m_Axes{ MakeFilled<InputType>(1.0f) };
/** The orientation vectors (must be orthogonal) of the ellipsoid axes. */
OrientationType m_Orientations{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkEllipsoidInteriorExteriorSpatialFunction.hxx"
#endif
#endif
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