mirror of
https://gitlab.kitware.com/vtk/vtk-m
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48 lines
1.5 KiB
C++
48 lines
1.5 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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#ifndef vtkm_m_worklet_MaskPoints_h
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#define vtkm_m_worklet_MaskPoints_h
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleCounting.h>
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#include <vtkm/cont/DataSet.h>
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namespace vtkm
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{
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namespace worklet
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{
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// Subselect points using stride for now, creating new cellset of vertices
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class MaskPoints
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{
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public:
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template <typename CellSetType>
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vtkm::cont::CellSetSingleType<> Run(const CellSetType& cellSet, const vtkm::Id stride)
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{
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vtkm::Id numberOfInputPoints = cellSet.GetNumberOfPoints();
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vtkm::Id numberOfSampledPoints = numberOfInputPoints / stride;
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vtkm::cont::ArrayHandleCounting<vtkm::Id> strideArray(0, stride, numberOfSampledPoints);
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vtkm::cont::ArrayHandle<vtkm::Id> pointIds;
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vtkm::cont::ArrayCopy(strideArray, pointIds);
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// Make CellSetSingleType with VERTEX at each point id
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vtkm::cont::CellSetSingleType<> outCellSet;
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outCellSet.Fill(numberOfInputPoints, vtkm::CellShapeTagVertex::Id, 1, pointIds);
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return outCellSet;
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}
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};
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}
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} // namespace vtkm::worklet
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#endif // vtkm_m_worklet_MaskPoints_h
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