mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 10:35:42 +00:00
109 lines
3.3 KiB
C++
109 lines
3.3 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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//
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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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#include <vtkm/cont/CoordinateSystem.h>
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#include <vtkm/cont/DynamicCellSet.h>
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namespace
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{
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// Needed to CompactPoints
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template <typename BasePolicy>
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struct CellSetSingleTypePolicy : public BasePolicy
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{
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using AllCellSetList = vtkm::cont::CellSetListTagUnstructured;
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};
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template <typename DerivedPolicy>
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inline vtkm::filter::PolicyBase<CellSetSingleTypePolicy<DerivedPolicy>> GetCellSetSingleTypePolicy(
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const vtkm::filter::PolicyBase<DerivedPolicy>&)
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{
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return vtkm::filter::PolicyBase<CellSetSingleTypePolicy<DerivedPolicy>>();
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}
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}
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namespace vtkm
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{
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namespace filter
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{
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//-----------------------------------------------------------------------------
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inline VTKM_CONT ExtractPoints::ExtractPoints()
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: vtkm::filter::FilterDataSet<ExtractPoints>()
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, ExtractInside(true)
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, CompactPoints(false)
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{
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}
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//-----------------------------------------------------------------------------
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template <typename DerivedPolicy>
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inline vtkm::cont::DataSet ExtractPoints::DoExecute(const vtkm::cont::DataSet& input,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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// extract the input cell set and coordinates
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const vtkm::cont::DynamicCellSet& cells = 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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// run the worklet on the cell set
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vtkm::cont::CellSetSingleType<> outCellSet(cells.GetName());
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vtkm::worklet::ExtractPoints worklet;
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outCellSet = worklet.Run(vtkm::filter::ApplyPolicy(cells, policy),
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coords.GetData(),
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this->Function,
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this->ExtractInside);
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// create the output dataset
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vtkm::cont::DataSet output;
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output.AddCellSet(outCellSet);
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output.AddCoordinateSystem(input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex()));
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// compact the unused points in the output dataset
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if (this->CompactPoints)
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{
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this->Compactor.SetCompactPointFields(true);
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this->Compactor.SetMergePoints(false);
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return this->Compactor.DoExecute(output, GetCellSetSingleTypePolicy(policy));
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}
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else
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{
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return output;
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}
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy>
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inline VTKM_CONT bool ExtractPoints::DoMapField(
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vtkm::cont::DataSet& result,
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const vtkm::cont::ArrayHandle<T, StorageType>& input,
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const vtkm::filter::FieldMetadata& fieldMeta,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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// point data is copied as is because it was not collapsed
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if (fieldMeta.IsPointField())
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{
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if (this->CompactPoints)
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{
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return this->Compactor.DoMapField(result, input, fieldMeta, policy);
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}
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else
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{
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result.AddField(fieldMeta.AsField(input));
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return true;
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}
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}
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// cell data does not apply
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return false;
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}
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}
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}
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