2016-12-14 19:05:50 +00:00
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//============================================================================
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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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2019-04-15 23:24:21 +00:00
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//
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2016-12-14 19:05:50 +00:00
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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_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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2017-05-18 14:29:41 +00:00
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namespace vtkm
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{
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namespace worklet
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{
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2016-12-14 19:05:50 +00:00
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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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2018-05-25 21:18:41 +00:00
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using ControlSignature = void(CellSetIn cellset,
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2019-01-10 18:59:25 +00:00
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FieldInCell inCellField,
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FieldOutPoint outPointField);
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2018-05-25 21:18:41 +00:00
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using ExecutionSignature = void(CellCount, _2, _3);
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2018-02-22 13:29:13 +00:00
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using InputDomain = _1;
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2016-12-14 19:05:50 +00:00
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2017-05-18 14:29:41 +00:00
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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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2017-08-04 16:43:26 +00:00
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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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2019-03-15 16:38:15 +00:00
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// OutType constructor is for when OutType is a Vec.
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// static_cast is for when OutType is a small int that gets promoted to int32.
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sum = static_cast<OutType>(sum + OutType(cellValues[cellIndex]));
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}
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2019-03-15 16:38:15 +00:00
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// OutType constructor is for when OutType is a Vec.
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// static_cast is for when OutType is a small int that gets promoted to int32.
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average = static_cast<OutType>(sum / OutType(static_cast<OutComponentType>(numCells)));
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}
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2017-05-18 14:29:41 +00:00
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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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