mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 10:35:42 +00:00
135 lines
3.9 KiB
C++
135 lines
3.9 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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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 ExternalFaces::ExternalFaces()
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: vtkm::filter::FilterDataSet<ExternalFaces>()
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, CompactPoints(false)
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, Worklet()
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{
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this->SetPassPolyData(true);
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}
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namespace
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{
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template <typename BasePolicy>
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struct CellSetExplicitPolicy : public BasePolicy
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{
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using AllCellSetList = vtkm::cont::CellSetListTagExplicitDefault;
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};
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template <typename DerivedPolicy>
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inline vtkm::filter::PolicyBase<CellSetExplicitPolicy<DerivedPolicy>> GetCellSetExplicitPolicy(
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const vtkm::filter::PolicyBase<DerivedPolicy>&)
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{
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return vtkm::filter::PolicyBase<CellSetExplicitPolicy<DerivedPolicy>>();
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}
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} // anonymous namespace
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//-----------------------------------------------------------------------------
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template <typename DerivedPolicy>
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inline VTKM_CONT vtkm::cont::DataSet ExternalFaces::DoExecute(
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const vtkm::cont::DataSet& input,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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//1. extract the cell set
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet(this->GetActiveCellSetIndex());
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//2. using the policy convert the dynamic cell set, and run the
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// external faces worklet
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vtkm::cont::CellSetExplicit<> outCellSet(cells.GetName());
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if (cells.IsSameType(vtkm::cont::CellSetStructured<3>()))
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{
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this->Worklet.Run(cells.Cast<vtkm::cont::CellSetStructured<3>>(),
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex()),
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outCellSet);
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}
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else
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{
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this->Worklet.Run(vtkm::filter::ApplyPolicyUnstructured(cells, policy), outCellSet);
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}
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//3. Check the fields of the dataset to see what kinds of fields are present so
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// we can free the cell mapping array if it won't be needed.
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const vtkm::Id numFields = input.GetNumberOfFields();
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bool hasCellFields = false;
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for (vtkm::Id fieldIdx = 0; fieldIdx < numFields && !hasCellFields; ++fieldIdx)
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{
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auto f = input.GetField(fieldIdx);
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if (f.GetAssociation() == vtkm::cont::Field::Association::CELL_SET)
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{
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hasCellFields = true;
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}
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}
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if (!hasCellFields)
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{
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this->Worklet.ReleaseCellMapArrays();
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}
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//4. 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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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, GetCellSetExplicitPolicy(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 ExternalFaces::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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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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else if (fieldMeta.IsCellField())
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{
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vtkm::cont::ArrayHandle<T> fieldArray;
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fieldArray = this->Worklet.ProcessCellField(input);
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result.AddField(fieldMeta.AsField(fieldArray));
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return true;
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}
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return false;
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}
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}
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}
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