mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
123 lines
4.4 KiB
C++
123 lines
4.4 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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// 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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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/cont/ArrayHandleIndex.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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namespace
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{
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template <typename CellSetList>
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bool IsCellSupported(const vtkm::cont::DynamicCellSetBase<CellSetList>& cellset)
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{
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//We only support 3D structured for now.
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if (cellset.template IsType<vtkm::cont::CellSetStructured<3>>())
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return true;
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return false;
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}
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} // anonymous namespace
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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(
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>>& 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, typename DeviceAdapter>
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inline VTKM_CONT vtkm::filter::Result 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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const DeviceAdapter& device)
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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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return vtkm::filter::Result();
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet(this->GetActiveCellSetIndex());
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const vtkm::cont::CoordinateSystem& coords =
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex());
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if (!IsCellSupported(cells))
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return vtkm::filter::Result();
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if (!fieldMeta.IsPointField())
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return vtkm::filter::Result();
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//todo: add check for rectilinear.
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typedef vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>> FieldHandle;
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typedef
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typename FieldHandle::template ExecutionTypes<DeviceAdapter>::PortalConst FieldPortalConstType;
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typedef vtkm::worklet::particleadvection::UniformGridEvaluate<FieldPortalConstType,
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T,
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DeviceAdapter>
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RGEvalType;
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typedef vtkm::worklet::particleadvection::RK4Integrator<RGEvalType, T> RK4RGType;
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//RGEvalType eval(input.GetCoordinateSystem(), input.GetCellSet(0), field);
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RGEvalType eval(coords, cells, field);
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RK4RGType rk4(eval, static_cast<vtkm::FloatDefault>(this->StepSize));
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vtkm::worklet::Streamline streamline;
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vtkm::worklet::StreamlineResult<T> res;
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>> seedArray;
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vtkm::cont::DeviceAdapterAlgorithm<DeviceAdapter>::Copy(this->Seeds, seedArray);
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res = Worklet.Run(rk4, seedArray, this->NumberOfSteps, device);
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vtkm::cont::DataSet outData;
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vtkm::cont::CoordinateSystem outputCoords("coordinates", res.positions);
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outData.AddCellSet(res.polyLines);
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outData.AddCoordinateSystem(outputCoords);
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return vtkm::filter::Result(outData);
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy, typename DeviceAdapter>
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inline VTKM_CONT bool Streamline::DoMapField(
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vtkm::filter::Result&,
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const vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, StorageType>&,
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const vtkm::filter::FieldMetadata&,
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const vtkm::filter::PolicyBase<DerivedPolicy>&,
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const DeviceAdapter&)
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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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