91 lines
3.0 KiB
C++
91 lines
3.0 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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#ifndef vtk_m_filter_Pathline_h
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#define vtk_m_filter_Pathline_h
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#include <vtkm/filter/FilterDataSetWithField.h>
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#include <vtkm/worklet/ParticleAdvection.h>
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#include <vtkm/worklet/particleadvection/GridEvaluators.h>
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#include <vtkm/worklet/particleadvection/Integrators.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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/// \brief generate streamlines from a vector field.
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/// Takes as input a vector field and seed locations and generates the
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/// paths taken by the seeds through the vector field.
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class Pathline : public vtkm::filter::FilterDataSetWithField<Pathline>
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{
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public:
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VTKM_CONT
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Pathline();
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VTKM_CONT
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void SetPreviousTime(vtkm::worklet::particleadvection::ScalarType t) { this->PreviousTime = t; }
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VTKM_CONT
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void SetNextTime(vtkm::worklet::particleadvection::ScalarType t) { this->NextTime = t; }
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VTKM_CONT
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void SetNextDataSet(const vtkm::cont::DataSet& ds) { this->NextDataSet = ds; }
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VTKM_CONT
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void SetStepSize(vtkm::worklet::particleadvection::ScalarType s) { this->StepSize = s; }
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VTKM_CONT
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void SetNumberOfSteps(vtkm::Id n) { this->NumberOfSteps = n; }
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VTKM_CONT
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void SetSeeds(vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>>& seeds);
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template <typename T, typename StorageType, typename DerivedPolicy>
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VTKM_CONT vtkm::cont::DataSet DoExecute(
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const vtkm::cont::DataSet& input,
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const vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, StorageType>& field,
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const vtkm::filter::FieldMetadata& fieldMeta,
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const vtkm::filter::PolicyBase<DerivedPolicy>& policy);
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//Map a new field onto the resulting dataset after running the filter
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//this call is only valid
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template <typename T, typename StorageType, typename DerivedPolicy>
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VTKM_CONT bool DoMapField(vtkm::cont::DataSet& result,
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const vtkm::cont::ArrayHandle<T, StorageType>& input,
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const vtkm::filter::FieldMetadata& fieldMeta,
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vtkm::filter::PolicyBase<DerivedPolicy> policy);
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private:
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vtkm::worklet::Streamline Worklet;
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vtkm::worklet::particleadvection::ScalarType StepSize;
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vtkm::worklet::particleadvection::ScalarType PreviousTime;
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vtkm::worklet::particleadvection::ScalarType NextTime;
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vtkm::cont::DataSet NextDataSet;
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vtkm::Id NumberOfSteps;
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> Seeds;
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};
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template <>
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class FilterTraits<Pathline>
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{
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public:
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struct TypeListTagPathline
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: vtkm::ListTagBase<vtkm::Vec<vtkm::Float32, 3>, vtkm::Vec<vtkm::Float64, 3>>
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{
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};
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using InputFieldTypeList = TypeListTagPathline;
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};
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}
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} // namespace vtkm::filter
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#include <vtkm/filter/Pathline.hxx>
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#endif // vtk_m_filter_Pathline_h
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