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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 itkDiscreteCurvatureQuadEdgeMeshFilter_h
#define itkDiscreteCurvatureQuadEdgeMeshFilter_h
#include "itkQuadEdgeMeshToQuadEdgeMeshFilter.h"
#include "itkConceptChecking.h"
#include "itkTriangleHelper.h"
namespace itk
{
/**
* \class DiscreteCurvatureQuadEdgeMeshFilter
*
* \brief FIXME
*
* \ingroup ITKQuadEdgeMeshFiltering
*/
template <typename TInputMesh, typename TOutputMesh = TInputMesh>
class ITK_TEMPLATE_EXPORT DiscreteCurvatureQuadEdgeMeshFilter
: public QuadEdgeMeshToQuadEdgeMeshFilter<TInputMesh, TOutputMesh>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(DiscreteCurvatureQuadEdgeMeshFilter);
using Self = DiscreteCurvatureQuadEdgeMeshFilter;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using Superclass = QuadEdgeMeshToQuadEdgeMeshFilter<TInputMesh, TOutputMesh>;
using InputMeshType = TInputMesh;
using InputMeshPointer = typename InputMeshType::Pointer;
using OutputMeshType = TOutputMesh;
using OutputMeshPointer = typename OutputMeshType::Pointer;
using OutputPointsContainerPointer = typename OutputMeshType::PointsContainerPointer;
using OutputPointsContainerIterator = typename OutputMeshType::PointsContainerIterator;
using OutputPointType = typename OutputMeshType::PointType;
using OutputCoordType = typename OutputPointType::CoordRepType;
using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
using OutputCellIdentifier = typename OutputMeshType::CellIdentifier;
using OutputQEType = typename OutputMeshType::QEType;
using OutputMeshTraits = typename OutputMeshType::MeshTraits;
using OutputCurvatureType = typename OutputMeshTraits::PixelType;
using TriangleType = TriangleHelper<OutputPointType>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(DiscreteCurvatureQuadEdgeMeshFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(OutputIsFloatingPointCheck, (Concept::IsFloatingPoint<OutputCurvatureType>));
// End concept checking
#endif
protected:
DiscreteCurvatureQuadEdgeMeshFilter()
: m_OutputMesh(nullptr)
{}
~DiscreteCurvatureQuadEdgeMeshFilter() override = default;
virtual OutputCurvatureType
EstimateCurvature(const OutputPointType & iP) = 0;
OutputCurvatureType
ComputeMixedArea(OutputQEType * iQE1, OutputQEType * iQE2)
{
OutputPointIdentifier id[3];
id[0] = iQE1->GetOrigin();
id[1] = iQE1->GetDestination();
id[2] = iQE2->GetDestination();
OutputPointType p[3];
for (int i = 0; i < 3; ++i)
{
p[i] = this->m_OutputMesh->GetPoint(id[i]);
}
return static_cast<OutputCurvatureType>(TriangleType::ComputeMixedArea(p[0], p[1], p[2]));
}
void
GenerateData() override
{
this->CopyInputMeshToOutputMesh();
OutputMeshPointer output = this->GetOutput();
OutputPointsContainerPointer points = output->GetPoints();
OutputPointsContainerIterator p_it = points->Begin();
OutputCurvatureType curvature;
this->m_OutputMesh = this->GetOutput();
while (p_it != points->End())
{
curvature = this->EstimateCurvature(p_it->Value());
output->SetPointData(p_it->Index(), curvature);
++p_it;
}
}
private:
/** Cache output pointer to avoid calls in inner loop to GetOutput() */
OutputMeshType * m_OutputMesh{};
};
} // end namespace itk
#endif
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