mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 11:05:44 +00:00
94 lines
3.4 KiB
C++
94 lines
3.4 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 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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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-NA0003525 with NTESS,
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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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#ifndef vtk_m_worklet_PointAverage_h
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#define vtk_m_worklet_PointAverage_h
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/VecTraits.h>
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namespace vtkm
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{
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namespace worklet
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{
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//simple functor that returns the average point value of a given
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//cell based field.
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class PointAverage : public vtkm::worklet::WorkletMapCellToPoint
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{
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public:
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using ControlSignature = void(CellSetIn cellset,
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FieldInCell<> inCellField,
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FieldOutPoint<> outPointField);
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using ExecutionSignature = void(CellCount, _2, _3);
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using InputDomain = _1;
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template <typename CellValueVecType, typename OutType>
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VTKM_EXEC void operator()(const vtkm::IdComponent& numCells,
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const CellValueVecType& cellValues,
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OutType& average) const
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{
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using CellValueType = typename CellValueVecType::ComponentType;
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using InVecSize =
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std::integral_constant<vtkm::IdComponent, vtkm::VecTraits<CellValueType>::NUM_COMPONENTS>;
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using OutVecSize =
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std::integral_constant<vtkm::IdComponent, vtkm::VecTraits<OutType>::NUM_COMPONENTS>;
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using SameLengthVectors = typename std::is_same<InVecSize, OutVecSize>::type;
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average = vtkm::TypeTraits<OutType>::ZeroInitialization();
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if (numCells != 0)
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{
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this->DoAverage(numCells, cellValues, average, SameLengthVectors());
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}
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}
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private:
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template <typename CellValueVecType, typename OutType>
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VTKM_EXEC void DoAverage(const vtkm::IdComponent& numCells,
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const CellValueVecType& cellValues,
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OutType& average,
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std::true_type) const
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{
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using OutComponentType = typename vtkm::VecTraits<OutType>::ComponentType;
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OutType sum = OutType(cellValues[0]);
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for (vtkm::IdComponent cellIndex = 1; cellIndex < numCells; ++cellIndex)
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{
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sum = sum + OutType(cellValues[cellIndex]);
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}
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average = sum / OutType(static_cast<OutComponentType>(numCells));
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}
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template <typename CellValueVecType, typename OutType>
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VTKM_EXEC void DoAverage(const vtkm::IdComponent& vtkmNotUsed(numCells),
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const CellValueVecType& vtkmNotUsed(cellValues),
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OutType& vtkmNotUsed(average),
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std::false_type) const
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{
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this->RaiseError("PointAverage called with mismatched Vec sizes for PointAverage.");
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}
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};
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}
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} // namespace vtkm::worklet
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#endif // vtk_m_worklet_PointAverage_h
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