221 lines
7.3 KiB
C++
221 lines
7.3 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/cont/DynamicCellSet.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/Gradient.h>
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namespace {
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//-----------------------------------------------------------------------------
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template<typename DerivedPolicy, typename Device, typename T, typename S>
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struct PointGrad
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{
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PointGrad(const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::ArrayHandle< T, S>& field,
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vtkm::cont::ArrayHandle< vtkm::Vec<T,3> >* result):
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Points(&coords),
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InField(&field),
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Result(result)
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{
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}
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template<typename CellSetType>
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void operator()(const CellSetType& cellset ) const
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{
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vtkm::worklet::DispatcherMapTopology<vtkm::worklet::PointGradient, Device> dispatcher;
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dispatcher.Invoke(cellset, //topology to iterate on a per point basis
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cellset, //whole cellset in
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vtkm::filter::ApplyPolicy(*this->Points, this->Policy),
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*this->InField,
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*this->Result);
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}
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vtkm::filter::PolicyBase<DerivedPolicy> Policy;
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const vtkm::cont::CoordinateSystem* const Points;
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const vtkm::cont::ArrayHandle<T,S>* const InField;
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vtkm::cont::ArrayHandle< vtkm::Vec<T,3> >* Result;
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private:
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void operator=(const PointGrad<DerivedPolicy,Device,T,S> &) = delete;
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};
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//-----------------------------------------------------------------------------
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template<typename HandleType>
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inline
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void add_field( vtkm::filter::ResultField& result,
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const HandleType& handle,
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const std::string name)
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{
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const vtkm::cont::Field::AssociationEnum assoc = result.GetField().GetAssociation();
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if ((assoc == vtkm::cont::Field::ASSOC_WHOLE_MESH) ||
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(assoc == vtkm::cont::Field::ASSOC_POINTS))
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{
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vtkm::cont::Field field(name, assoc, handle);
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result.GetDataSet().AddField(field);
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}
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else
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{
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vtkm::cont::Field field(name,
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assoc,
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result.GetField().GetAssocCellSet(),
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handle);
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result.GetDataSet().AddField(field);
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}
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}
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//-----------------------------------------------------------------------------
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template<typename T, typename S, typename DeviceAdapter>
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inline
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void add_extra_vec_fields( const vtkm::cont::ArrayHandle< vtkm::Vec< vtkm::Vec<T,3>, 3>, S> &inField,
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const vtkm::filter::Gradient* const filter,
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vtkm::filter::ResultField& result,
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const DeviceAdapter&)
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{
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if(filter->GetComputeDivergence())
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{
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vtkm::cont::ArrayHandle< T > divergence;
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vtkm::worklet::DispatcherMapField< vtkm::worklet::Divergence, DeviceAdapter > dispatcher;
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dispatcher.Invoke(inField, divergence);
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add_field(result, divergence, filter->GetDivergenceName());
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}
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if(filter->GetComputeVorticity())
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{
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vtkm::cont::ArrayHandle< vtkm::Vec<T,3> > vorticity;
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vtkm::worklet::DispatcherMapField< vtkm::worklet::Vorticity, DeviceAdapter > dispatcher;
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dispatcher.Invoke(inField, vorticity);
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add_field(result, vorticity, filter->GetVorticityName());
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}
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if(filter->GetComputeQCriterion())
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{
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vtkm::cont::ArrayHandle< T > qc;
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vtkm::worklet::DispatcherMapField< vtkm::worklet::QCriterion, DeviceAdapter > dispatcher;
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dispatcher.Invoke(inField, qc);
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add_field(result, qc, filter->GetQCriterionName());
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}
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}
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template<typename T, typename S, typename DeviceAdapter>
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inline
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void add_extra_vec_fields( const vtkm::cont::ArrayHandle< T, S> &,
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const vtkm::filter::Gradient* const,
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vtkm::filter::ResultField&,
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const DeviceAdapter&)
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{
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//not a vector array handle so add nothing
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}
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} //namespace
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namespace vtkm {
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namespace filter {
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//-----------------------------------------------------------------------------
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Gradient::Gradient():
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ComputePointGradient(false),
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ComputeVorticity(false),
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ComputeQCriterion(false),
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DivergenceName("Divergence"),
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VorticityName("Vorticity"),
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QCriterionName("QCriterion")
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{
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}
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//-----------------------------------------------------------------------------
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template<typename T,
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typename StorageType,
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typename DerivedPolicy,
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typename DeviceAdapter>
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inline
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vtkm::filter::ResultField Gradient::DoExecute(
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const vtkm::cont::DataSet &input,
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const vtkm::cont::ArrayHandle<T, StorageType> &inField,
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const vtkm::filter::FieldMetadata &fieldMetadata,
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const vtkm::filter::PolicyBase<DerivedPolicy>& policy,
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const DeviceAdapter& adapter)
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{
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if(!fieldMetadata.IsPointField())
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{
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//we currently only support point fields, as we need to write the
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//worklet to efficiently map a cell field to the points of a cell
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//without doing a memory explosion
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return vtkm::filter::ResultField();
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}
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const vtkm::cont::DynamicCellSet& cells =
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input.GetCellSet(this->GetActiveCellSetIndex());
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const vtkm::cont::CoordinateSystem& coords =
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex());
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vtkm::cont::Field::AssociationEnum fieldAssociation;
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std::string outputName = this->GetOutputFieldName();
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if (outputName.empty())
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{
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outputName = "Gradients";
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}
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//todo: we need to ask the policy what storage type we should be using
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//If the input is implicit, we should know what to fall back to
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vtkm::cont::ArrayHandle< vtkm::Vec<T,3> > outArray;
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if(this->ComputePointGradient)
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{
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PointGrad<DerivedPolicy,DeviceAdapter,T,StorageType> func(coords, inField, &outArray);
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vtkm::cont::CastAndCall( vtkm::filter::ApplyPolicy(cells, policy),
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func);
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fieldAssociation = vtkm::cont::Field::ASSOC_POINTS;
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}
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else
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{
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vtkm::worklet::DispatcherMapTopology<
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vtkm::worklet::CellGradient,
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DeviceAdapter > dispatcher;
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dispatcher.Invoke( vtkm::filter::ApplyPolicy(cells, policy),
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vtkm::filter::ApplyPolicy(coords, policy),
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inField,
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outArray);
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fieldAssociation = vtkm::cont::Field::ASSOC_CELL_SET;
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}
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vtkm::filter::ResultField result(input,
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outArray,
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outputName,
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fieldAssociation,
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cells.GetName());
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//Add the vorticity and qcriterion fields if they are enabled to the result
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add_extra_vec_fields(outArray, this, result, adapter);
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return result;
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}
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}
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} // namespace vtkm::filter
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