mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 13:23:51 +00:00
98 lines
2.8 KiB
C++
98 lines
2.8 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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//
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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/worklet/WorkletMapField.h>
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#include <vtkm/filter/CreateResult.h>
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#include <vtkm/filter/FilterField.h>
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#include <vtkm/io/VTKDataSetWriter.h>
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#include <vtkm/cont/Initialize.h>
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#include <vtkm/cont/testing/MakeTestDataSet.h>
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#include <vtkm/VectorAnalysis.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 HelloWorklet : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn inVector, FieldOut outMagnitude);
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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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}
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} // namespace vtkm::worklet
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namespace vtkm
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{
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namespace filter
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{
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class HelloField : public vtkm::filter::FilterField<HelloField>
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{
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public:
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// Specify that this filter operates on 3-vectors
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using SupportedTypes = vtkm::TypeListFieldVec3;
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template <typename FieldType, typename Policy>
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VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& inDataSet,
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const FieldType& 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_IS_ARRAY_HANDLE(FieldType);
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//construct our output
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> outField;
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//construct our invoker to launch worklets
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vtkm::worklet::HelloWorklet mag;
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this->Invoke(mag, inField, outField); //launch mag worklets
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//construct output field information
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if (this->GetOutputFieldName().empty())
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{
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this->SetOutputFieldName(fieldMetadata.GetName() + "_magnitude");
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}
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//return the result, which is the input data with the computed field added to it
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return vtkm::filter::CreateResult(
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inDataSet, outField, this->GetOutputFieldName(), fieldMetadata);
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}
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};
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}
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} // vtkm::filter
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int main(int argc, char** argv)
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{
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vtkm::cont::Initialize(argc, argv, vtkm::cont::InitializeOptions::Strict);
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vtkm::cont::testing::MakeTestDataSet testDataMaker;
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vtkm::cont::DataSet inputData = testDataMaker.Make3DExplicitDataSetCowNose();
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vtkm::filter::HelloField helloField;
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helloField.SetActiveField("point_vectors");
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vtkm::cont::DataSet outputData = helloField.Execute(inputData);
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vtkm::io::VTKDataSetWriter writer("out_data.vtk");
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writer.WriteDataSet(outputData);
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return 0;
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}
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