mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
ed43dad6ca
Previously, DynamicArrayHandle and DynamicCellSet had slightly different interfaces to their CastTo feature. It was a bit confusing and not all that easy to use. This change simplifies and unifies them by making each class have a single CopyTo method that takes a reference to a cast object (an ArrayHandle or CellSet, respectively) and fills that object with the data contained if the cast is successfull. This interface gets around having to declare strange types. Each object also has a Cast method that has to have a template parameter specified and returns a reference of that type (if possible). In addition, the old behavior is preserved for DynamicArrayHandle (but not DynamicCellSet). To avoid confusion, the name of that cast method is CastToTypeStorage. However, the method was chaned to not take parameters to make it consistent with the other Cast method. Also, the IsType methods have been modified to reflect changes in cast/copy. IsType now no longer takes arguments. However, an alternate IsSameType does the same thing but does take an argument.
212 lines
6.8 KiB
C++
212 lines
6.8 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 vtk_m_worklet_TetrahedralizeUniformGrid_h
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#define vtk_m_worklet_TetrahedralizeUniformGrid_h
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleGroupVec.h>
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#include <vtkm/cont/CellSetSingleType.h>
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#include <vtkm/cont/CellSetStructured.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/DeviceAdapter.h>
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#include <vtkm/cont/DynamicArrayHandle.h>
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#include <vtkm/cont/ErrorControlBadValue.h>
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#include <vtkm/cont/Field.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/ScatterUniform.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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namespace vtkm {
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namespace worklet {
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namespace detail {
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VTKM_EXEC_CONSTANT_EXPORT
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const static vtkm::IdComponent StructuredTriangleIndices[2][3] = {
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{ 0, 1, 2 },
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{ 0, 2, 3 }
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};
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VTKM_EXEC_CONSTANT_EXPORT
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const static vtkm::IdComponent StructuredTetrahedronIndices[2][5][4] = {
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{
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{ 0, 1, 3, 4 },
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{ 1, 4, 5, 6 },
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{ 1, 4, 6, 3 },
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{ 1, 3, 6, 2 },
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{ 3, 6, 7, 4 }
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},
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{
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{ 2, 1, 5, 0 },
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{ 0, 2, 3, 7 },
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{ 2, 5, 6, 7 },
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{ 0, 7, 4, 5 },
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{ 0, 2, 7, 5 }
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}
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};
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} // namespace detail
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/// \brief Compute the tetrahedralize cells for a uniform grid data set
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template <typename DeviceAdapter>
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class TetrahedralizeFilterUniformGrid
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{
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public:
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//
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// Worklet to turn quads into triangles
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// Vertices remain the same and each cell is processed with needing topology
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//
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class TriangulateCell : public vtkm::worklet::WorkletMapPointToCell
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{
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public:
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typedef void ControlSignature(TopologyIn topology,
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FieldOutCell<> connectivityOut);
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typedef void ExecutionSignature(PointIndices, _2, VisitIndex);
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typedef _1 InputDomain;
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typedef vtkm::worklet::ScatterUniform ScatterType;
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VTKM_CONT_EXPORT
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ScatterType GetScatter() const
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{
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return ScatterType(2);
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}
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VTKM_CONT_EXPORT
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TriangulateCell()
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{ }
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// Each quad cell produces 2 triangle cells
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template<typename ConnectivityInVec, typename ConnectivityOutVec>
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VTKM_EXEC_EXPORT
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void operator()(const ConnectivityInVec &connectivityIn,
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ConnectivityOutVec &connectivityOut,
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vtkm::IdComponent visitIndex) const
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{
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connectivityOut[0] = connectivityIn[detail::StructuredTriangleIndices[visitIndex][0]];
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connectivityOut[1] = connectivityIn[detail::StructuredTriangleIndices[visitIndex][1]];
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connectivityOut[2] = connectivityIn[detail::StructuredTriangleIndices[visitIndex][2]];
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}
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};
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//
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// Worklet to turn hexahedra into tetrahedra
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// Vertices remain the same and each cell is processed with needing topology
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//
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class TetrahedralizeCell : public vtkm::worklet::WorkletMapPointToCell
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{
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public:
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typedef void ControlSignature(TopologyIn topology,
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FieldOutCell<> connectivityOut);
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typedef void ExecutionSignature(PointIndices, _2, ThreadIndices);
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typedef _1 InputDomain;
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typedef vtkm::worklet::ScatterUniform ScatterType;
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VTKM_CONT_EXPORT
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ScatterType GetScatter() const
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{
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return ScatterType(5);
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}
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VTKM_CONT_EXPORT
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TetrahedralizeCell()
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{ }
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// Each hexahedron cell produces five tetrahedron cells
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template<typename ConnectivityInVec,
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typename ConnectivityOutVec,
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typename ThreadIndicesType>
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VTKM_EXEC_EXPORT
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void operator()(const ConnectivityInVec &connectivityIn,
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ConnectivityOutVec &connectivityOut,
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const ThreadIndicesType threadIndices) const
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{
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vtkm::Id3 inputIndex = threadIndices.GetInputIndex3D();
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// Calculate the type of tetrahedron generated because it alternates
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vtkm::Id indexType = (inputIndex[0] + inputIndex[1] + inputIndex[2]) % 2;
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vtkm::IdComponent visitIndex = threadIndices.GetVisitIndex();
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connectivityOut[0] = connectivityIn[detail::StructuredTetrahedronIndices[indexType][visitIndex][0]];
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connectivityOut[1] = connectivityIn[detail::StructuredTetrahedronIndices[indexType][visitIndex][1]];
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connectivityOut[2] = connectivityIn[detail::StructuredTetrahedronIndices[indexType][visitIndex][2]];
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connectivityOut[3] = connectivityIn[detail::StructuredTetrahedronIndices[indexType][visitIndex][3]];
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}
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};
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//
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// Construct the filter to tetrahedralize uniform grid
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//
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TetrahedralizeFilterUniformGrid(const vtkm::cont::DataSet &inDataSet,
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vtkm::cont::DataSet &outDataSet) :
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InDataSet(inDataSet),
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OutDataSet(outDataSet)
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{
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}
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vtkm::cont::DataSet InDataSet; // input dataset with structured cell set
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vtkm::cont::DataSet OutDataSet; // output dataset with explicit cell set
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//
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// Populate the output dataset with triangles or tetrahedra based on input uniform dataset
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//
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void Run()
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{
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// Get the cell set from the output data set
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vtkm::cont::CellSetSingleType<> &cellSet =
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this->OutDataSet.GetCellSet(0).template Cast<vtkm::cont::CellSetSingleType<> >();
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vtkm::cont::ArrayHandle<vtkm::Id> connectivity;
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if (cellSet.GetDimensionality() == 2)
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{
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vtkm::cont::CellSetStructured<2> inCellSet;
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InDataSet.GetCellSet(0).CopyTo(inCellSet);
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vtkm::worklet::DispatcherMapTopology<TriangulateCell,DeviceAdapter> dispatcher;
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dispatcher.Invoke(inCellSet,
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vtkm::cont::make_ArrayHandleGroupVec<3>(connectivity));
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}
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else if (cellSet.GetDimensionality() == 3)
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{
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vtkm::cont::CellSetStructured<3> inCellSet;
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InDataSet.GetCellSet(0).CopyTo(inCellSet);
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vtkm::worklet::DispatcherMapTopology<TetrahedralizeCell,DeviceAdapter> dispatcher;
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dispatcher.Invoke(inCellSet,
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vtkm::cont::make_ArrayHandleGroupVec<4>(connectivity));
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}
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else
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{
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throw vtkm::cont::ErrorControlBadValue(
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"Unsupported dimensionality for TetrahedralizeUniformGrid.");
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}
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// Add cells to output cellset
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cellSet.Fill(connectivity);
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}
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};
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}
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} // namespace vtkm::worklet
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#endif // vtk_m_worklet_TetrahedralizeUniformGrid_h
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