713cf4228a
The CellSetExplicit and CellSetSingleType classes have an ivar that marks the number of points. There were several instances of code creating cell sets without specifying the number of points. This can be very bad if subsequent code needs that information.
189 lines
6.4 KiB
C++
189 lines
6.4 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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// 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_TriangulateExplicitGrid_h
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#define vtk_m_worklet_TriangulateExplicitGrid_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/CellSetExplicit.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/Field.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/DispatcherMapTopology.h>
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#include <vtkm/worklet/ScatterCounting.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/worklet/internal/TriangulateTables.h>
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namespace vtkm {
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namespace worklet {
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/// \brief Compute the triangulate cells for an explicit grid data set
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template <typename DeviceAdapter>
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class TriangulateFilterExplicitGrid
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{
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public:
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//
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// Worklet to count the number of triangles generated per cell
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//
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class TrianglesPerCell : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<> shapes,
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FieldIn<> numPoints,
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ExecObject tables,
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FieldOut<> triangleCount);
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typedef _4 ExecutionSignature(_1,_2,_3);
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typedef _1 InputDomain;
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VTKM_CONT
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TrianglesPerCell() {}
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VTKM_EXEC
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vtkm::IdComponent operator()(
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vtkm::UInt8 shape,
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vtkm::IdComponent numPoints,
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const vtkm::worklet::internal::TriangulateTablesExecutionObject<DeviceAdapter> &tables) const
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{
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return tables.GetCount(vtkm::CellShapeTagGeneric(shape), numPoints);
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}
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};
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//
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// Worklet to turn cells 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(CellSetIn cellset,
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ExecObject tables,
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FieldOutCell<> connectivityOut);
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typedef void ExecutionSignature(CellShape, PointIndices, _2, _3, VisitIndex);
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typedef _1 InputDomain;
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typedef vtkm::worklet::ScatterCounting ScatterType;
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VTKM_CONT
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ScatterType GetScatter() const
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{
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return this->Scatter;
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}
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template<typename CountArrayType>
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VTKM_CONT
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TriangulateCell(const CountArrayType &countArray)
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: Scatter(countArray, DeviceAdapter())
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{ }
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// Each cell produces triangles and write result at the offset
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template<typename CellShapeTag,
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typename ConnectivityInVec,
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typename ConnectivityOutVec>
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VTKM_EXEC
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void operator()(
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CellShapeTag shape,
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const ConnectivityInVec &connectivityIn,
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const vtkm::worklet::internal::TriangulateTablesExecutionObject<DeviceAdapter> &tables,
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ConnectivityOutVec &connectivityOut,
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vtkm::IdComponent visitIndex) const
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{
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vtkm::Vec<vtkm::IdComponent,3> triIndices =
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tables.GetIndices(shape, visitIndex);
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connectivityOut[0] = connectivityIn[triIndices[0]];
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connectivityOut[1] = connectivityIn[triIndices[1]];
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connectivityOut[2] = connectivityIn[triIndices[2]];
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}
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private:
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ScatterType Scatter;
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};
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//
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// Construct the filter to triangulate explicit grid
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//
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TriangulateFilterExplicitGrid(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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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 based on input explicit dataset
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//
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void Run()
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{
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// Cell sets belonging to input and output datasets
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vtkm::cont::CellSetExplicit<> inCellSet;
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InDataSet.GetCellSet(0).CopyTo(inCellSet);
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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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// Input topology
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vtkm::cont::ArrayHandle<vtkm::UInt8> inShapes = inCellSet.GetShapesArray(
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vtkm::TopologyElementTagPoint(), vtkm::TopologyElementTagCell());
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vtkm::cont::ArrayHandle<vtkm::IdComponent> inNumIndices = inCellSet.GetNumIndicesArray(
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vtkm::TopologyElementTagPoint(), vtkm::TopologyElementTagCell());
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// Output topology
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vtkm::cont::ArrayHandle<vtkm::Id> outConnectivity;
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vtkm::worklet::internal::TriangulateTables tables;
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// Determine the number of output cells each input cell will generate
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vtkm::cont::ArrayHandle<vtkm::IdComponent> numOutCellArray;
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vtkm::worklet::DispatcherMapField<TrianglesPerCell,DeviceAdapter>
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triPerCellDispatcher;
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triPerCellDispatcher.Invoke(inShapes,
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inNumIndices,
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tables.PrepareForInput(DeviceAdapter()),
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numOutCellArray);
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// Build new cells
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TriangulateCell triangulateWorklet(numOutCellArray);
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vtkm::worklet::DispatcherMapTopology<TriangulateCell,DeviceAdapter>
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triangulateDispatcher(triangulateWorklet);
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triangulateDispatcher.Invoke(
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inCellSet,
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tables.PrepareForInput(DeviceAdapter()),
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vtkm::cont::make_ArrayHandleGroupVec<3>(outConnectivity));
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// Add cells to output cellset
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cellSet.Fill(
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this->OutDataSet.GetCoordinateSystem().GetData().GetNumberOfValues(),
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vtkm::CellShapeTagTriangle::Id,
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3,
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outConnectivity);
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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_TriangulateExplicitGrid_h
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