mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-07-06 07:17:25 +00:00
a17ebdf52a
The original design of the filter base class required several specialized base classes to control what information was pulled from the input `DataSet` and provided to the derived class. Since the filter base class was redesigned, the derived classes all get a `DataSet` and pull their own information from it. Thus, most specialized filter base classes became unnecessary and removed. The one substantial exception was the `FilterField`. This filter base class managed input and output arrays. This was kept separate from the base `Filter` because not all filters need the ability to select this information. That said, this separation has not been particularly helpful. There are several other features of `Filter` that does not apply to all subclasses. Furthermore, there are several derived filters that are using `FilterField` merely to pick a single part, like selecting a coordinate system, and ignoring the rest of the abilities. Thus, it makes more sense to deprecate `FilterField` and have these classes inherit directly from `Filter`.
106 lines
3.2 KiB
C++
106 lines
3.2 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/Filter.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::Filter
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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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