mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
121 lines
4.0 KiB
C++
121 lines
4.0 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_ExtractPoints_h
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#define vtkm_m_worklet_ExtractPoints_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/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/CoordinateSystem.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/ImplicitFunctionHandle.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 ExtractPoints
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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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////////////////////////////////////////////////////////////////////////////////////
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// Worklet to identify points within volume of interest
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class ExtractPointsByVOI : public vtkm::worklet::WorkletMapCellToPoint
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{
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public:
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using ControlSignature = void(CellSetIn cellset,
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FieldInPoint coordinates,
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ExecObject function,
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FieldOutPoint passFlags);
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using ExecutionSignature = _4(_2, _3);
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VTKM_CONT
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ExtractPointsByVOI(bool extractInside)
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: passValue(extractInside)
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, failValue(!extractInside)
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{
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}
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VTKM_EXEC
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bool operator()(const vtkm::Vec<vtkm::Float64, 3>& coordinate,
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const vtkm::ImplicitFunction* function) const
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{
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bool pass = passValue;
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vtkm::Float64 value = function->Value(coordinate);
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if (value > 0)
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{
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pass = failValue;
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}
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return pass;
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}
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private:
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bool passValue;
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bool failValue;
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};
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////////////////////////////////////////////////////////////////////////////////////
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// Extract points by id creates new cellset of vertex cells
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template <typename CellSetType>
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vtkm::cont::CellSetSingleType<> Run(const CellSetType& cellSet,
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const vtkm::cont::ArrayHandle<vtkm::Id>& pointIds)
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{
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vtkm::cont::ArrayCopy(pointIds, this->ValidPointIds);
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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(
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cellSet.GetNumberOfPoints(), vtkm::CellShapeTagVertex::Id, 1, this->ValidPointIds);
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return outCellSet;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Extract points by implicit function
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template <typename CellSetType, typename CoordinateType>
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vtkm::cont::CellSetSingleType<> Run(const CellSetType& cellSet,
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const CoordinateType& coordinates,
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const vtkm::cont::ImplicitFunctionHandle& implicitFunction,
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bool extractInside)
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{
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// Worklet output will be a boolean passFlag array
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vtkm::cont::ArrayHandle<bool> passFlags;
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ExtractPointsByVOI worklet(extractInside);
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DispatcherMapTopology<ExtractPointsByVOI> dispatcher(worklet);
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dispatcher.Invoke(cellSet, coordinates, implicitFunction, passFlags);
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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, this->ValidPointIds);
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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(
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cellSet.GetNumberOfPoints(), vtkm::CellShapeTagVertex::Id, 1, this->ValidPointIds);
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return outCellSet;
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}
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> ValidPointIds;
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};
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}
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} // namespace vtkm::worklet
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#endif // vtkm_m_worklet_ExtractPoints_h
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