689ba00e4c
While updating the slides for an upcoming tutorial, some minor changes were made to the tutorial examples to more clearly explain concepts or simply fit things better on slides.
106 lines
3.3 KiB
C++
106 lines
3.3 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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//
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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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#include <vtkm/cont/Initialize.h>
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#include <vtkm/io/VTKDataSetReader.h>
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#include <vtkm/io/VTKDataSetWriter.h>
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#include <vtkm/worklet/WorkletMapTopology.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 ConvertPointFieldToCells : vtkm::worklet::WorkletVisitCellsWithPoints
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{
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using ControlSignature = void(CellSetIn topology,
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FieldInPoint inPointField,
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FieldOutCell outCellField);
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using ExecutionSignature = void(_2 inPointField, _3 outCellField);
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using InputDomain = _1;
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template <typename InPointFieldVecType, typename OutCellFieldType>
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VTKM_EXEC void operator()(const InPointFieldVecType& inPointFieldVec,
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OutCellFieldType& outCellField) const
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{
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vtkm::IdComponent numPoints = inPointFieldVec.GetNumberOfComponents();
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outCellField = OutCellFieldType(0);
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for (vtkm::IdComponent pointIndex = 0; pointIndex < numPoints; ++pointIndex)
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{
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outCellField = outCellField + inPointFieldVec[pointIndex];
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}
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outCellField =
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static_cast<OutCellFieldType>(outCellField / static_cast<vtkm::FloatDefault>(numPoints));
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}
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};
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} // namespace worklet
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} // namespace vtkm
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#include <vtkm/filter/NewFilterField.h>
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namespace vtkm
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{
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namespace filter
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{
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struct ConvertPointFieldToCells : vtkm::filter::NewFilterField
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{
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VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& inDataSet) override;
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};
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VTKM_CONT cont::DataSet ConvertPointFieldToCells::DoExecute(const vtkm::cont::DataSet& inDataSet)
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{
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const auto& inField = this->GetFieldFromDataSet(inDataSet);
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vtkm::cont::UnknownArrayHandle outArray;
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auto resolveType = [&](const auto& inConcrete) {
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using ValueType = typename std::decay_t<decltype(inConcrete)>::ValueType;
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vtkm::cont::ArrayHandle<ValueType> outConcrete;
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this->Invoke(
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vtkm::worklet::ConvertPointFieldToCells{}, inDataSet.GetCellSet(), inConcrete, outConcrete);
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outArray = outConcrete;
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};
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this->CastAndCallScalarField(inField, resolveType);
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std::string outFieldName = this->GetOutputFieldName();
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if (outFieldName == "")
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{
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outFieldName = inField.GetName();
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}
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return this->CreateResultFieldCell(inDataSet, outFieldName, outArray);
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}
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} // namespace filter
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} // namespace vtkm
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int main(int argc, char** argv)
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{
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auto opts = vtkm::cont::InitializeOptions::DefaultAnyDevice;
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vtkm::cont::InitializeResult config = vtkm::cont::Initialize(argc, argv, opts);
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const char* input = "data/kitchen.vtk";
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vtkm::io::VTKDataSetReader reader(input);
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vtkm::cont::DataSet ds_from_file = reader.ReadDataSet();
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vtkm::filter::ConvertPointFieldToCells pointToCell;
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pointToCell.SetActiveField("c1");
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vtkm::cont::DataSet ds_from_convert = pointToCell.Execute(ds_from_file);
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vtkm::io::VTKDataSetWriter writer("out_point_to_cell.vtk");
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writer.WriteDataSet(ds_from_convert);
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return 0;
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}
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