mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-07-30 18:50:59 +00:00
80 lines
2.6 KiB
C++
80 lines
2.6 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/VectorAnalysis.h>
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#include <vtkm/cont/Initialize.h>
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#include <vtkm/cont/Invoker.h>
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#include <vtkm/filter/Gradient.h>
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#include <vtkm/io/reader/VTKDataSetReader.h>
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#include <vtkm/io/writer/VTKDataSetWriter.h>
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#include <vtkm/filter/Gradient.h>
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#include <vtkm/worklet/WorkletMapField.h>
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struct ComputeMagnitude : vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn inputVectors, FieldOut outputMagnitudes);
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VTKM_EXEC void operator()(const vtkm::Vec3f& inVector, vtkm::FloatDefault& outMagnitude) const
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{
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outMagnitude = vtkm::Magnitude(inVector);
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}
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};
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#include <vtkm/filter/FilterField.h>
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class FieldMagnitude : public vtkm::filter::FilterField<FieldMagnitude>
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{
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public:
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using SupportedTypes = vtkm::List<vtkm::Vec3f>;
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template <typename ArrayHandleType, typename Policy>
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VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& inDataSet,
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const ArrayHandleType& inField,
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const vtkm::filter::FieldMetadata& fieldMetadata,
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vtkm::filter::PolicyBase<Policy>)
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{
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> outField;
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this->Invoke(ComputeMagnitude{}, inField, outField);
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std::string outFieldName = this->GetOutputFieldName();
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if (outFieldName == "")
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{
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outFieldName = fieldMetadata.GetName() + "_magnitude";
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}
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return vtkm::filter::CreateResult(inDataSet, outField, outFieldName, fieldMetadata);
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}
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};
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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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vtkm::io::VTKDataSetReader reader("data/kitchen.vtk");
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vtkm::cont::DataSet ds_from_file = reader.ReadDataSet();
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vtkm::filter::Gradient grad;
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grad.SetActiveField("c1");
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vtkm::cont::DataSet ds_from_grad = grad.Execute(ds_from_file);
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FieldMagnitude mag;
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mag.SetActiveField("Gradients");
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vtkm::cont::DataSet mag_grad = mag.Execute(ds_from_grad);
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vtkm::io::VTKDataSetWriter writer("out_mag_grad.vtk");
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writer.WriteDataSet(mag_grad);
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return 0;
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}
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