mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
110 lines
3.7 KiB
C++
110 lines
3.7 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_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/worklet/WorkletMapField.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/DeviceAdapterAlgorithm.h>
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namespace vtkm {
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namespace worklet {
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// Threshold points on predicate producing CellSetSingleType<VERTEX> with
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// resulting subset of points
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class ThresholdPoints : public vtkm::worklet::WorkletMapPointToCell
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{
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public:
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struct BoolType : vtkm::ListTagBase<bool> { };
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template <typename UnaryPredicate>
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class ThresholdPointField : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<> scalars,
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FieldOut<BoolType> passFlags);
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typedef _2 ExecutionSignature(_1);
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VTKM_CONT
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ThresholdPointField() : Predicate() { }
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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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template<typename ScalarType>
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VTKM_EXEC
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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,
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typename UnaryPredicate,
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typename ValueType,
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typename StorageType,
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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::cont::ArrayHandle<ValueType, StorageType>& fieldArray,
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const UnaryPredicate &predicate,
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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::cont::ArrayHandle<bool> passFlags;
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vtkm::Id numberOfInputPoints = cellSet.GetNumberOfPoints();
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// Worklet output will be a boolean passFlag array
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typedef ThresholdPointField<UnaryPredicate> ThresholdWorklet;
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ThresholdWorklet worklet(predicate);
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DispatcherMapField<ThresholdWorklet, DeviceAdapter> dispatcher(worklet);
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dispatcher.Invoke(fieldArray, 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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DeviceAlgorithm::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(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_ThresholdPoints_h
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