mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
68 lines
2.4 KiB
C++
68 lines
2.4 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 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 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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#ifndef vtkm_m_worklet_MaskPoints_h
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#define vtkm_m_worklet_MaskPoints_h
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/cont/DataSet.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/DeviceAdapterAlgorithm.h>
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namespace vtkm {
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namespace worklet {
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// Subselect points using stride for now, creating new cellset of vertices
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class MaskPoints : public vtkm::worklet::WorkletMapPointToCell
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{
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public:
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template <typename CellSetType,
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typename DeviceAdapter>
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vtkm::cont::CellSetSingleType<> Run(
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const CellSetType &cellSet,
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const vtkm::Id stride,
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DeviceAdapter device)
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{
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typedef typename vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter> DeviceAlgorithm;
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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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DeviceAlgorithm::Copy(strideArray, pointIds);
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// Make CellSetSingleType with VERTEX at each point id
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vtkm::cont::CellSetSingleType< > outCellSet("cells");
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outCellSet.Fill(numberOfInputPoints,
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vtkm::CellShapeTagVertex::Id,
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1,
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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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