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https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
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 ```
123 lines
4.4 KiB
C++
123 lines
4.4 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 vtk_m_cont_CellSetExtrude_hxx
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#define vtk_m_cont_CellSetExtrude_hxx
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namespace
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{
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struct ComputeReverseMapping : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn cellIndex, WholeArrayOut cellIds);
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using ExecutionSignature = void(_1, _2);
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VTKM_SUPPRESS_EXEC_WARNINGS
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template <typename PortalType>
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VTKM_EXEC void operator()(vtkm::Id cellId, PortalType&& pointIdValue) const
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{
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//3 as we are building the connectivity for triangles
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const vtkm::Id offset = 3 * cellId;
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pointIdValue.Set(offset, static_cast<vtkm::Int32>(cellId));
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pointIdValue.Set(offset + 1, static_cast<vtkm::Int32>(cellId));
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pointIdValue.Set(offset + 2, static_cast<vtkm::Int32>(cellId));
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}
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};
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struct ComputePrevNode : public vtkm::worklet::WorkletMapField
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{
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typedef void ControlSignature(FieldIn nextNode, WholeArrayOut prevNodeArray);
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typedef void ExecutionSignature(InputIndex, _1, _2);
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template <typename PortalType>
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VTKM_EXEC void operator()(vtkm::Id idx, vtkm::Int32 next, PortalType& prevs) const
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{
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prevs.Set(static_cast<vtkm::Id>(next), static_cast<vtkm::Int32>(idx));
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}
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};
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} // anonymous namespace
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namespace vtkm
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{
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namespace cont
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{
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template <typename Device>
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VTKM_CONT void CellSetExtrude::BuildReverseConnectivity(Device)
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{
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vtkm::cont::Invoker invoke(Device{});
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// create a mapping of where each key is the point id and the value
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// is the cell id. We
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const vtkm::Id numberOfPointsPerCell = 3;
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const vtkm::Id rconnSize = this->NumberOfCellsPerPlane * numberOfPointsPerCell;
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vtkm::cont::ArrayHandle<vtkm::Int32> pointIdKey;
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vtkm::cont::DeviceAdapterAlgorithm<Device>::Copy(this->Connectivity, pointIdKey);
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this->RConnectivity.Allocate(rconnSize);
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invoke(ComputeReverseMapping{},
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vtkm::cont::make_ArrayHandleCounting<vtkm::Id>(0, 1, this->NumberOfCellsPerPlane),
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this->RConnectivity);
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vtkm::cont::DeviceAdapterAlgorithm<Device>::SortByKey(pointIdKey, this->RConnectivity);
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// now we can compute the counts and offsets
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vtkm::cont::ArrayHandle<vtkm::Int32> reducedKeys;
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vtkm::cont::DeviceAdapterAlgorithm<Device>::ReduceByKey(
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pointIdKey,
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vtkm::cont::make_ArrayHandleConstant(vtkm::Int32(1), static_cast<vtkm::Int32>(rconnSize)),
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reducedKeys,
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this->RCounts,
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vtkm::Add{});
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vtkm::cont::DeviceAdapterAlgorithm<Device>::ScanExclusive(this->RCounts, this->ROffsets);
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// compute PrevNode from NextNode
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this->PrevNode.Allocate(this->NextNode.GetNumberOfValues());
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invoke(ComputePrevNode{}, this->NextNode, this->PrevNode);
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this->ReverseConnectivityBuilt = true;
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}
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template <typename Device>
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CellSetExtrude::ConnectivityP2C<Device> CellSetExtrude::PrepareForInput(
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Device,
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vtkm::TopologyElementTagCell,
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vtkm::TopologyElementTagPoint) const
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{
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return ConnectivityP2C<Device>(this->Connectivity.PrepareForInput(Device{}),
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this->NextNode.PrepareForInput(Device{}),
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this->NumberOfCellsPerPlane,
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this->NumberOfPointsPerPlane,
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this->NumberOfPlanes,
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this->IsPeriodic);
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}
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template <typename Device>
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VTKM_CONT CellSetExtrude::ConnectivityC2P<Device> CellSetExtrude::PrepareForInput(
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Device,
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vtkm::TopologyElementTagPoint,
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vtkm::TopologyElementTagCell) const
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{
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if (!this->ReverseConnectivityBuilt)
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{
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const_cast<CellSetExtrude*>(this)->BuildReverseConnectivity(Device{});
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}
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return ConnectivityC2P<Device>(this->RConnectivity.PrepareForInput(Device{}),
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this->ROffsets.PrepareForInput(Device{}),
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this->RCounts.PrepareForInput(Device{}),
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this->PrevNode.PrepareForInput(Device{}),
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this->NumberOfCellsPerPlane,
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this->NumberOfPointsPerPlane,
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this->NumberOfPlanes);
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}
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}
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} // vtkm::cont
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#endif
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