mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
90 lines
2.6 KiB
C++
90 lines
2.6 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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#ifndef vtkm_m_worklet_ThresholdPoints_h
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#define vtkm_m_worklet_ThresholdPoints_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/Algorithm.h>
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#include <vtkm/cont/ArrayHandle.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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class ThresholdPoints
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{
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public:
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struct BoolType : vtkm::ListTagBase<bool>
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{
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};
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template <typename UnaryPredicate>
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class ThresholdPointField : public vtkm::worklet::WorkletMapCellToPoint
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{
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public:
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using ControlSignature = void(CellSetIn cellset, FieldInPoint scalars, FieldOutPoint passFlags);
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using ExecutionSignature = _3(_2);
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VTKM_CONT
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ThresholdPointField()
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: Predicate()
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{
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}
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VTKM_CONT
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explicit ThresholdPointField(const UnaryPredicate& predicate)
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: Predicate(predicate)
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{
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}
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template <typename ScalarType>
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VTKM_EXEC bool operator()(const ScalarType& scalar) const
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{
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return this->Predicate(scalar);
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}
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private:
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UnaryPredicate Predicate;
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};
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template <typename CellSetType, typename ScalarsArrayHandle, typename UnaryPredicate>
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vtkm::cont::CellSetSingleType<> Run(const CellSetType& cellSet,
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const ScalarsArrayHandle& scalars,
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const UnaryPredicate& predicate)
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{
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vtkm::cont::ArrayHandle<bool> passFlags;
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using ThresholdWorklet = ThresholdPointField<UnaryPredicate>;
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ThresholdWorklet worklet(predicate);
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DispatcherMapTopology<ThresholdWorklet> dispatcher(worklet);
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dispatcher.Invoke(cellSet, scalars, passFlags);
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vtkm::cont::ArrayHandle<vtkm::Id> pointIds;
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vtkm::cont::ArrayHandleCounting<vtkm::Id> indices =
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vtkm::cont::make_ArrayHandleCounting(vtkm::Id(0), vtkm::Id(1), passFlags.GetNumberOfValues());
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vtkm::cont::Algorithm::CopyIf(indices, passFlags, pointIds);
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// Make CellSetSingleType with VERTEX at each point id
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vtkm::cont::CellSetSingleType<> outCellSet(cellSet.GetName());
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outCellSet.Fill(cellSet.GetNumberOfPoints(), 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_ThresholdPoints_h
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