mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-07-30 10:44:02 +00:00
405643ddbb
During the VTK-m 1.8 and 1.9 development, the filter infrastructure was overhauled. Part of this created a completely new set of base classes. To avoid confusion with the original filter base classes and ease transition, the new filter base classes were named `NewFilter*`. Eventually after all filters were transitioned, the old filter base classes were deprecated. With the release of VTK-m 2.0, the old filter base classes are removed. The "new" filter base classes are no longer new. Thus, they have been renamed simply `Filter` (and `FilterField`).
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//============================================================================
|
|
// Copyright (c) Kitware, Inc.
|
|
// All rights reserved.
|
|
// See LICENSE.txt for details.
|
|
//
|
|
// This software is distributed WITHOUT ANY WARRANTY; without even
|
|
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
// PURPOSE. See the above copyright notice for more information.
|
|
//============================================================================
|
|
#include <vtkm/VectorAnalysis.h>
|
|
|
|
#include <vtkm/cont/Initialize.h>
|
|
#include <vtkm/cont/Invoker.h>
|
|
|
|
#include <vtkm/filter/FilterField.h>
|
|
#include <vtkm/filter/vector_analysis/Gradient.h>
|
|
#include <vtkm/io/VTKDataSetReader.h>
|
|
#include <vtkm/io/VTKDataSetWriter.h>
|
|
|
|
#include <vtkm/worklet/WorkletMapField.h>
|
|
|
|
// Worklet that does the actual work on the device.
|
|
struct ComputeMagnitude : vtkm::worklet::WorkletMapField
|
|
{
|
|
using ControlSignature = void(FieldIn inputVectors, FieldOut outputMagnitudes);
|
|
|
|
VTKM_EXEC void operator()(const vtkm::Vec3f& inVector, vtkm::FloatDefault& outMagnitude) const
|
|
{
|
|
outMagnitude = vtkm::Magnitude(inVector);
|
|
}
|
|
};
|
|
|
|
// The filter class used by external code to run the algorithm. Normally the class definition
|
|
// is in a separate header file.
|
|
class FieldMagnitude : public vtkm::filter::FilterField
|
|
{
|
|
protected:
|
|
VTKM_CONT vtkm::cont::DataSet DoExecute(const vtkm::cont::DataSet& inDataSet) override;
|
|
};
|
|
|
|
// Implementation for the filter. Normally this is in its own .cxx file.
|
|
VTKM_CONT vtkm::cont::DataSet FieldMagnitude::DoExecute(const vtkm::cont::DataSet& inDataSet)
|
|
{
|
|
const vtkm::cont::Field& inField = this->GetFieldFromDataSet(inDataSet);
|
|
vtkm::cont::ArrayHandle<vtkm::FloatDefault> outArrayHandle;
|
|
|
|
auto resolveType = [&](const auto& inArrayHandle) {
|
|
this->Invoke(ComputeMagnitude{}, inArrayHandle, outArrayHandle);
|
|
};
|
|
this->CastAndCallVecField<3>(inField, resolveType);
|
|
|
|
std::string outFieldName = this->GetOutputFieldName();
|
|
if (outFieldName == "")
|
|
{
|
|
outFieldName = inField.GetName() + "_magnitude";
|
|
}
|
|
|
|
return this->CreateResultField(inDataSet, outFieldName, inField.GetAssociation(), outArrayHandle);
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
auto opts = vtkm::cont::InitializeOptions::DefaultAnyDevice;
|
|
vtkm::cont::InitializeResult config = vtkm::cont::Initialize(argc, argv, opts);
|
|
|
|
vtkm::io::VTKDataSetReader reader("data/kitchen.vtk");
|
|
vtkm::cont::DataSet ds_from_file = reader.ReadDataSet();
|
|
|
|
vtkm::filter::vector_analysis::Gradient grad;
|
|
grad.SetActiveField("c1");
|
|
vtkm::cont::DataSet ds_from_grad = grad.Execute(ds_from_file);
|
|
|
|
FieldMagnitude mag;
|
|
mag.SetActiveField("Gradients");
|
|
vtkm::cont::DataSet mag_grad = mag.Execute(ds_from_grad);
|
|
|
|
vtkm::io::VTKDataSetWriter writer("out_mag_grad.vtk");
|
|
writer.WriteDataSet(mag_grad);
|
|
|
|
return 0;
|
|
}
|