mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 10:35:42 +00:00
94 lines
3.3 KiB
C++
94 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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#ifndef vtk_m_filter_Streamline_hxx
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#define vtk_m_filter_Streamline_hxx
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandleIndex.h>
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#include <vtkm/cont/ErrorFilterExecution.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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#include <vtkm/worklet/particleadvection/Particles.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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//-----------------------------------------------------------------------------
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inline VTKM_CONT Streamline::Streamline()
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: vtkm::filter::FilterDataSetWithField<Streamline>()
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, Worklet()
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{
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}
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//-----------------------------------------------------------------------------
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inline VTKM_CONT void Streamline::SetSeeds(vtkm::cont::ArrayHandle<vtkm::Particle>& seeds)
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{
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this->Seeds = seeds;
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy>
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inline VTKM_CONT vtkm::cont::DataSet Streamline::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>&)
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{
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//Check for some basics.
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if (this->Seeds.GetNumberOfValues() == 0)
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{
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throw vtkm::cont::ErrorFilterExecution("No seeds provided.");
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}
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet();
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const vtkm::cont::CoordinateSystem& coords =
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex());
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if (!fieldMeta.IsPointField())
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{
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throw vtkm::cont::ErrorFilterExecution("Point field expected.");
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}
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using FieldHandle = vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, StorageType>;
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using GridEvalType = vtkm::worklet::particleadvection::GridEvaluator<FieldHandle>;
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using RK4Type = vtkm::worklet::particleadvection::RK4Integrator<GridEvalType>;
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GridEvalType eval(coords, cells, field);
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RK4Type rk4(eval, this->StepSize);
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vtkm::worklet::StreamlineResult res;
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vtkm::cont::ArrayHandle<vtkm::Particle> seedArray;
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vtkm::cont::ArrayCopy(this->Seeds, seedArray);
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res = this->Worklet.Run(rk4, seedArray, this->NumberOfSteps);
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vtkm::cont::DataSet outData;
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vtkm::cont::CoordinateSystem outputCoords("coordinates", res.Positions);
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outData.SetCellSet(res.PolyLines);
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outData.AddCoordinateSystem(outputCoords);
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return outData;
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy>
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inline VTKM_CONT bool Streamline::DoMapField(vtkm::cont::DataSet&,
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const vtkm::cont::ArrayHandle<T, StorageType>&,
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const vtkm::filter::FieldMetadata&,
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vtkm::filter::PolicyBase<DerivedPolicy>)
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{
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return false;
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}
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}
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} // namespace vtkm::filter
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#endif
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