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https://gitlab.kitware.com/vtk/vtk-m
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5db762ee71
The `From` and `To` nomenclature for topology mapping has been confusing for both users and developers, especially at lower levels where the intention of mapping attributes from one element to another is easily conflated with the concept of mapping indices (which maps in the exact opposite direction). These identifiers have been renamed to `VisitTopology` and `IncidentTopology` to clarify the direction of the mapping. The order in which these template parameters are specified for `WorkletMapTopology` have also been reversed, since eventually there may be more than one `IncidentTopology`, and having `IncidentTopology` at the end will allow us to replace it with a variadic template parameter pack in the future. Other implementation details supporting these worklets, include `Fetch` tags, `Connectivity` classes, and methods on the various `CellSet` classes (such as `PrepareForInput` have also reversed their template arguments. These will need to be cautiously updated. The convenience implementations of `WorkletMapTopology` have been renamed for clarity as follows: ``` WorkletMapPointToCell --> WorkletVisitCellsWithPoints WorkletMapCellToPoint --> WorkletVisitPointsWithCells ``` The `ControlSignature` tags have been renamed as follows: ``` FieldInTo --> FieldInVisit FieldInFrom --> FieldInMap FromCount --> IncidentElementCount FromIndices --> IncidentElementIndices ```
120 lines
4.0 KiB
C++
120 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::WorkletVisitPointsWithCells
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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::Vec3f_64& coordinate, 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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