mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
a68422d454
This filter adds a pair of fields to a `DataSet` which mirror the indices of the points and cells, respectively. These fields are useful for tracking the provenance of the elements of a `DataSet` as it gets manipulated by the filters. It is also convenient for adding indices to operations designed for fields and for testing purposes.
65 lines
1.6 KiB
C++
65 lines
1.6 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/filter/GenerateIds.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandleCast.h>
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#include <vtkm/cont/ArrayHandleIndex.h>
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namespace
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{
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vtkm::cont::UnknownArrayHandle GenerateArray(const vtkm::filter::GenerateIds& self, vtkm::Id size)
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{
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vtkm::cont::ArrayHandleIndex indexArray(size);
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if (self.GetUseFloat())
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{
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> output;
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vtkm::cont::ArrayCopy(indexArray, output);
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return output;
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}
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else
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{
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vtkm::cont::ArrayHandle<vtkm::Id> output;
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vtkm::cont::ArrayCopy(indexArray, output);
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return output;
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}
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}
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} // anonymous namespace
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namespace vtkm
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{
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namespace filter
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{
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vtkm::cont::DataSet GenerateIds::DoExecute(const vtkm::cont::DataSet& input) const
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{
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vtkm::cont::DataSet output = input;
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if (this->GetGeneratePointIds())
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{
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output.AddPointField(this->GetPointFieldName(),
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GenerateArray(*this, input.GetNumberOfPoints()));
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}
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if (this->GetGenerateCellIds())
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{
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output.AddCellField(this->GetCellFieldName(), GenerateArray(*this, input.GetNumberOfCells()));
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}
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return output;
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}
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} // namespace vtkm::filter
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} // namespace vtkm
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