mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 10:35:42 +00:00
264a8a4b6c
The testing files (even the headers) are not available if `VTKm_ENABLE_TESTING` is off. Mostly, the testing was used to generate example data sets. Instead, change the examples to load data files.
118 lines
3.3 KiB
C++
118 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/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/VTKDataSetReader.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/VectorAnalysis.h>
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#include <cstdlib>
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#include <iostream>
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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);
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if ((argc < 3) || (argc > 4))
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{
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std::cerr << "Usage: " << argv[0] << " in_data.vtk field_name [out_data.vtk]\n\n";
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std::cerr << "For example, you could use the simple_unstructured_bin.vtk that comes with the "
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"VTK-m source:\n\n";
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std::cerr
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<< " " << argv[0]
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<< " <path-to-vtkm-source>/data/data/unstructured/simple_unstructured_bin.vtk vectors\n";
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return 1;
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}
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std::string infilename = argv[1];
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std::string infield = argv[2];
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std::string outfilename = "out_data.vtk";
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if (argc == 4)
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{
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outfilename = argv[3];
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}
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vtkm::io::VTKDataSetReader reader(infilename);
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vtkm::cont::DataSet inputData = reader.ReadDataSet();
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vtkm::filter::HelloField helloField;
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helloField.SetActiveField(infield);
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vtkm::cont::DataSet outputData = helloField.Execute(inputData);
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vtkm::io::VTKDataSetWriter writer(outfilename);
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writer.WriteDataSet(outputData);
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return 0;
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}
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