mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-06 10:29:00 +00:00
187 lines
6.3 KiB
C++
187 lines
6.3 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 2019 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2019 UT-Battelle, LLC.
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// Copyright 2019 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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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 vtk_m_worklet_RemoveDegeneratePolygons_h
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#define vtk_m_worklet_RemoveDegeneratePolygons_h
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandleIndex.h>
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#include <vtkm/cont/CellSetExplicit.h>
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#include <vtkm/cont/CellSetPermutation.h>
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#include <vtkm/worklet/CellDeepCopy.h>
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#include <vtkm/CellTraits.h>
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#include <vtkm/exec/CellFace.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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struct RemoveDegenerateCells
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{
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struct IdentifyDegenerates : vtkm::worklet::WorkletMapPointToCell
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{
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using ControlSignature = void(CellSetIn, FieldOutCell);
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using ExecutionSignature = _2(CellShape, FromIndices);
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using InputDomain = _1;
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template <vtkm::IdComponent dimensionality, typename CellShapeTag, typename PointVecType>
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VTKM_EXEC bool CheckForDimensionality(vtkm::CellTopologicalDimensionsTag<dimensionality>,
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CellShapeTag,
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PointVecType&& pointIds) const
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{
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const vtkm::IdComponent numPoints = pointIds.GetNumberOfComponents();
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vtkm::IdComponent numUnduplicatedPoints = 0;
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for (vtkm::IdComponent localPointId = 0; localPointId < numPoints; ++localPointId)
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{
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++numUnduplicatedPoints;
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if (numUnduplicatedPoints >= dimensionality + 1)
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{
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return true;
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}
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while (((localPointId < numPoints - 1) &&
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(pointIds[localPointId] == pointIds[localPointId + 1])) ||
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((localPointId == numPoints - 1) && (pointIds[localPointId] == pointIds[0])))
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{
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// Skip over any repeated points. Assume any repeated points are adjacent.
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++localPointId;
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}
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}
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return false;
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}
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template <typename CellShapeTag, typename PointVecType>
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VTKM_EXEC bool CheckForDimensionality(vtkm::CellTopologicalDimensionsTag<0>,
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CellShapeTag,
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PointVecType&&)
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{
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return true;
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}
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template <typename CellShapeTag, typename PointVecType>
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VTKM_EXEC bool CheckForDimensionality(vtkm::CellTopologicalDimensionsTag<3>,
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CellShapeTag shape,
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PointVecType&& pointIds)
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{
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const vtkm::IdComponent numFaces = vtkm::exec::CellFaceNumberOfFaces(shape, *this);
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vtkm::Id numValidFaces = 0;
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for (vtkm::IdComponent faceId = 0; faceId < numFaces; ++faceId)
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{
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if (this->CheckForDimensionality(
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vtkm::CellTopologicalDimensionsTag<2>(), vtkm::CellShapeTagPolygon(), pointIds))
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{
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++numValidFaces;
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if (numValidFaces > 2)
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{
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return true;
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}
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}
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}
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return false;
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}
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template <typename CellShapeTag, typename PointIdVec>
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VTKM_EXEC bool operator()(CellShapeTag shape, const PointIdVec& pointIds) const
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{
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using Traits = vtkm::CellTraits<CellShapeTag>;
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return this->CheckForDimensionality(
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typename Traits::TopologicalDimensionsTag(), shape, pointIds);
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}
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template <typename PointIdVec>
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VTKM_EXEC bool operator()(vtkm::CellShapeTagGeneric shape, PointIdVec&& pointIds) const
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{
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bool passCell = true;
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switch (shape.Id)
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{
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vtkmGenericCellShapeMacro(passCell = (*this)(CellShapeTag(), pointIds));
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default:
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// Raise an error for unknown cell type? Pass if we don't know.
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passCell = true;
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}
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return passCell;
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}
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};
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template <typename CellSetType>
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vtkm::cont::CellSetExplicit<> Run(const CellSetType& cellSet)
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{
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vtkm::cont::ArrayHandle<bool> passFlags;
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DispatcherMapTopology<IdentifyDegenerates> dispatcher;
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dispatcher.Invoke(cellSet, 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(
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vtkm::cont::ArrayHandleIndex(passFlags.GetNumberOfValues()), passFlags, this->ValidCellIds);
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vtkm::cont::CellSetPermutation<CellSetType> permutation(
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this->ValidCellIds, cellSet, cellSet.GetName());
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vtkm::cont::CellSetExplicit<> output;
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vtkm::worklet::CellDeepCopy::Run(permutation, output);
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return output;
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}
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struct CallWorklet
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{
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template <typename CellSetType>
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void operator()(const CellSetType& cellSet,
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RemoveDegenerateCells& self,
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vtkm::cont::CellSetExplicit<>& output) const
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{
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output = self.Run(cellSet);
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}
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};
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template <typename CellSetList>
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vtkm::cont::CellSetExplicit<> Run(const vtkm::cont::DynamicCellSetBase<CellSetList>& cellSet)
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{
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vtkm::cont::CellSetExplicit<> output;
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cellSet.CastAndCall(CallWorklet(), *this, output);
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return output;
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}
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template <typename ValueType, typename StorageTag>
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vtkm::cont::ArrayHandle<ValueType> ProcessCellField(
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const vtkm::cont::ArrayHandle<ValueType, StorageTag> in) const
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{
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// Use a temporary permutation array to simplify the mapping:
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auto tmp = vtkm::cont::make_ArrayHandlePermutation(this->ValidCellIds, in);
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// Copy into an array with default storage:
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vtkm::cont::ArrayHandle<ValueType> result;
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vtkm::cont::ArrayCopy(tmp, result);
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return result;
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}
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> ValidCellIds;
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};
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}
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}
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#endif //vtk_m_worklet_RemoveDegeneratePolygons_h
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