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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 itkSmoothingQuadEdgeMeshFilter_hxx
#define itkSmoothingQuadEdgeMeshFilter_hxx
#include "itkProgressReporter.h"
namespace itk
{
template <typename TInputMesh, typename TOutputMesh>
SmoothingQuadEdgeMeshFilter<TInputMesh, TOutputMesh>::SmoothingQuadEdgeMeshFilter()
{
this->m_CoefficientsMethod = nullptr;
this->m_DelaunayConforming = false;
this->m_NumberOfIterations = 1;
this->m_RelaxationFactor = static_cast<OutputCoordType>(1.0);
this->m_InputDelaunayFilter = InputOutputDelaunayConformingType::New();
this->m_OutputDelaunayFilter = OutputDelaunayConformingType::New();
}
template <typename TInputMesh, typename TOutputMesh>
SmoothingQuadEdgeMeshFilter<TInputMesh, TOutputMesh>::~SmoothingQuadEdgeMeshFilter() = default;
template <typename TInputMesh, typename TOutputMesh>
void
SmoothingQuadEdgeMeshFilter<TInputMesh, TOutputMesh>::SetCoefficientsMethod(CoefficientsComputation * iMethod)
{
m_CoefficientsMethod = iMethod;
this->Modified();
}
template <typename TInputMesh, typename TOutputMesh>
void
SmoothingQuadEdgeMeshFilter<TInputMesh, TOutputMesh>::GenerateData()
{
OutputPointIdentifier numberOfPoints = this->GetInput()->GetNumberOfPoints();
ProgressReporter progress(this, 0, m_NumberOfIterations * (numberOfPoints + 1), 100);
OutputMeshPointer mesh = OutputMeshType::New();
OutputPointsContainerPointer temp = OutputPointsContainer::New();
temp->Reserve(numberOfPoints);
OutputPointsContainerPointer points;
OutputPointsContainerIterator it;
OutputPointType p;
OutputPointType q;
OutputPointType r;
OutputVectorType v;
OutputCoordType coeff;
OutputCoordType sum_coeff;
OutputCoordType den;
OutputQEType * qe;
OutputQEType * qe_it;
if (this->m_DelaunayConforming)
{
m_InputDelaunayFilter->SetInput(this->GetInput());
if (m_NumberOfIterations == 0)
{
m_InputDelaunayFilter->GraftOutput(this->GetOutput());
m_InputDelaunayFilter->Update();
this->GraftOutput(m_InputDelaunayFilter->GetOutput());
}
else
{
m_InputDelaunayFilter->Update();
mesh = m_InputDelaunayFilter->GetOutput();
}
}
else
{
if (m_NumberOfIterations == 0)
{
this->CopyInputMeshToOutputMesh();
}
else
{
CopyMeshToMesh(this->GetInput(), mesh.GetPointer());
}
}
for (unsigned int iter = 0; iter < m_NumberOfIterations; ++iter)
{
points = mesh->GetPoints();
for (it = points->Begin(); it != points->End(); ++it)
{
p = it.Value();
qe = p.GetEdge();
if (qe != nullptr)
{
r = p;
v.Fill(0.0);
qe_it = qe;
sum_coeff = 0.;
do
{
q = mesh->GetPoint(qe_it->GetDestination());
coeff = (*m_CoefficientsMethod)(mesh, qe_it);
sum_coeff += coeff;
v += coeff * (q - p);
qe_it = qe_it->GetOnext();
} while (qe_it != qe);
den = 1.0 / static_cast<OutputCoordType>(sum_coeff);
v *= den;
r += m_RelaxationFactor * v;
r.SetEdge(qe);
temp->SetElement(it.Index(), r);
}
else
{
temp->SetElement(it.Index(), p);
}
progress.CompletedPixel();
}
mesh->SetPoints(temp);
if (this->m_DelaunayConforming)
{
mesh->DisconnectPipeline();
m_OutputDelaunayFilter->SetInput(mesh);
if (iter + 1 == m_NumberOfIterations)
{
m_OutputDelaunayFilter->GraftOutput(this->GetOutput());
m_OutputDelaunayFilter->Update();
this->GraftOutput(m_OutputDelaunayFilter->GetOutput());
}
else
{
m_OutputDelaunayFilter->Update();
mesh = m_OutputDelaunayFilter->GetOutput();
}
}
progress.CompletedPixel();
if (iter + 1 == m_NumberOfIterations)
{
this->GraftOutput(mesh);
}
}
}
template <typename TInputMesh, typename TOutputMesh>
void
SmoothingQuadEdgeMeshFilter<TInputMesh, TOutputMesh>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "DelaunayConforming: " << (m_DelaunayConforming ? "On" : "Off") << std::endl;
os << indent << "NumberOfIterations: " << m_NumberOfIterations << std::endl;
os << indent << "RelaxationFactor: " << m_RelaxationFactor << std::endl;
}
} // namespace itk
#endif
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