mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
70 lines
2.3 KiB
C++
70 lines
2.3 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_Mask_h
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#define vtkm_m_worklet_Mask_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/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/ArrayHandlePermutation.h>
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#include <vtkm/cont/CellSetPermutation.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 Mask
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{
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public:
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template <typename CellSetType>
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vtkm::cont::CellSetPermutation<CellSetType> Run(const CellSetType& cellSet, const vtkm::Id stride)
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{
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using OutputType = vtkm::cont::CellSetPermutation<CellSetType>;
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vtkm::Id numberOfInputCells = cellSet.GetNumberOfCells();
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vtkm::Id numberOfSampledCells = numberOfInputCells / stride;
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vtkm::cont::ArrayHandleCounting<vtkm::Id> strideArray(0, stride, numberOfSampledCells);
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vtkm::cont::ArrayCopy(strideArray, this->ValidCellIds);
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return OutputType(this->ValidCellIds, cellSet);
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}
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//----------------------------------------------------------------------------
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template <typename ValueType, typename StorageType>
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vtkm::cont::ArrayHandle<ValueType> ProcessCellField(
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const vtkm::cont::ArrayHandle<ValueType, StorageType>& in) const
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{
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// Use a temporary permutation array to simplify the mapping:
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auto tmp = vtkm::cont::make_ArrayHandlePermutation(this->ValidCellIds, in);
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// Copy into an array with default storage:
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vtkm::cont::ArrayHandle<ValueType> result;
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vtkm::cont::ArrayCopy(tmp, result);
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return result;
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}
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vtkm::cont::ArrayHandle<vtkm::Id> GetValidCellIds() const { return this->ValidCellIds; }
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> ValidCellIds;
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};
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}
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} // namespace vtkm::worklet
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#endif // vtkm_m_worklet_Mask_h
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