mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
122 lines
4.1 KiB
C++
122 lines
4.1 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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namespace
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{
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class AddPermutationCellSet
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{
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vtkm::cont::DataSet* Output;
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vtkm::cont::ArrayHandle<vtkm::Id>* ValidIds;
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public:
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AddPermutationCellSet(vtkm::cont::DataSet& data, vtkm::cont::ArrayHandle<vtkm::Id>& validIds)
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: Output(&data)
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, ValidIds(&validIds)
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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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typedef vtkm::cont::CellSetPermutation<CellSetType> PermutationCellSetType;
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PermutationCellSetType permCellSet(*this->ValidIds, cellset, cellset.GetName());
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this->Output->AddCellSet(permCellSet);
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}
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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 Mask::Mask()
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: vtkm::filter::FilterDataSet<Mask>()
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, Stride(1)
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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, typename DeviceAdapter>
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inline VTKM_CONT vtkm::filter::ResultDataSet Mask::DoExecute(
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const vtkm::cont::DataSet& input, const vtkm::filter::PolicyBase<DerivedPolicy>& policy,
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const DeviceAdapter&)
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{
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet(this->GetActiveCellSetIndex());
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typedef typename vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter> DeviceAlgorithm;
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vtkm::Id numberOfInputCells = cells.GetNumberOfCells();
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vtkm::Id numberOfSampledCells = numberOfInputCells / this->Stride;
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vtkm::cont::ArrayHandleCounting<vtkm::Id> strideArray(0, this->Stride, numberOfSampledCells);
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DeviceAlgorithm::Copy(strideArray, this->ValidCellIds);
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// create the output dataset
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vtkm::cont::DataSet output;
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output.AddCoordinateSystem(input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex()));
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AddPermutationCellSet addCellSet(output, this->ValidCellIds);
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vtkm::cont::CastAndCall(vtkm::filter::ApplyPolicy(cells, policy), addCellSet);
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return output;
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy, typename DeviceAdapter>
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inline VTKM_CONT bool Mask::DoMapField(vtkm::filter::ResultDataSet& 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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const vtkm::filter::PolicyBase<DerivedPolicy>&,
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const DeviceAdapter&)
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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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result.GetDataSet().AddField(fieldMeta.AsField(input));
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return true;
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}
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if (fieldMeta.IsCellField())
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{
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//todo: We need to generate a new output policy that replaces
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//the original storage tag with a new storage tag where everything is
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//wrapped in ArrayHandlePermutation.
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typedef vtkm::cont::ArrayHandlePermutation<vtkm::cont::ArrayHandle<vtkm::Id>,
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vtkm::cont::ArrayHandle<T, StorageType>>
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PermutationType;
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PermutationType permutation =
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vtkm::cont::make_ArrayHandlePermutation(this->ValidCellIds, input);
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result.GetDataSet().AddField(fieldMeta.AsField(permutation));
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return true;
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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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