366 lines
14 KiB
C++
366 lines
14 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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#ifndef vtk_m_worklet_Gradient_h
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#define vtk_m_worklet_Gradient_h
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#include <vtkm/exec/CellDerivative.h>
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#include <vtkm/exec/ExecutionWholeArray.h>
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#include <vtkm/exec/ParametricCoordinates.h>
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#include <vtkm/CellTraits.h>
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#include <vtkm/VecFromPortal.h>
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#include <vtkm/VecFromPortalPermute.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/exec/CellDerivative.h>
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namespace vtkm {
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namespace worklet {
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struct GradientInTypes
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: vtkm::ListTagBase<vtkm::Float32,
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vtkm::Float64,
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vtkm::Vec<vtkm::Float32,3>,
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vtkm::Vec<vtkm::Float64,3> >
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{ };
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struct GradientOutTypes
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: vtkm::ListTagBase<
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vtkm::Vec<vtkm::Float32,3>,
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vtkm::Vec<vtkm::Float64,3>,
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vtkm::Vec< vtkm::Vec<vtkm::Float32,3>, 3>,
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vtkm::Vec< vtkm::Vec<vtkm::Float64,3>, 3>
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>
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{ };
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struct GradientVecOutTypes
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: vtkm::ListTagBase<
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vtkm::Vec< vtkm::Vec<vtkm::Float32,3>, 3>,
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vtkm::Vec< vtkm::Vec<vtkm::Float64,3>, 3>
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> { };
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struct CellGradient : vtkm::worklet::WorkletMapPointToCell
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{
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typedef void ControlSignature(CellSetIn,
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FieldInPoint<Vec3> pointCoordinates,
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FieldInPoint<GradientInTypes> inputField,
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FieldOutCell<GradientOutTypes> outputField);
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typedef void ExecutionSignature(CellShape, PointCount, _2, _3, _4);
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typedef _1 InputDomain;
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template <typename CellTagType, typename PointCoordVecType,
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typename FieldInVecType, typename FieldOutType>
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VTKM_EXEC void operator()(CellTagType shape,
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vtkm::IdComponent pointCount, const PointCoordVecType& pointCoordinates,
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const FieldInVecType& inputField, FieldOutType& outputField) const
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{
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//To confirm that we have the proper input and output types we need
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//to verify that input type matches the output vtkm::Vec<T> 'T' type.
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//For example:
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// input is float => output is vtkm::Vec<float>
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// input is vtkm::Vec<float> => output is vtkm::Vec< vtkm::Vec< float > >
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//Grab the dimension tag for the input
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using InValueType = typename FieldInVecType::ComponentType;
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using InDimensionTag = typename TypeTraits<InValueType>::DimensionalityTag;
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//grab the dimension tag for the output component type
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using OutValueType = typename FieldOutType::ComponentType;
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using OutDimensionTag = typename TypeTraits<OutValueType>::DimensionalityTag;
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//Verify that input and output dimension tags match
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using Matches = typename std::is_same<InDimensionTag, OutDimensionTag>::type;
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this->Compute(shape, pointCount, pointCoordinates, inputField, outputField,
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Matches());
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}
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template <typename CellShapeTag, typename PointCoordVecType,
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typename FieldInVecType, typename FieldOutType>
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VTKM_EXEC void Compute(CellShapeTag shape,
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vtkm::IdComponent pointCount, const PointCoordVecType& wCoords,
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const FieldInVecType& field, FieldOutType& outputField,
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std::true_type) const
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{
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vtkm::Vec<vtkm::FloatDefault, 3> center =
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vtkm::exec::ParametricCoordinatesCenter(pointCount, shape, *this);
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outputField = vtkm::exec::CellDerivative(field, wCoords, center, shape, *this);
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}
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template <typename CellShapeTag,
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typename PointCoordVecType,
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typename FieldInVecType,
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typename FieldOutType>
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VTKM_EXEC void Compute(CellShapeTag,
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vtkm::IdComponent,
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const PointCoordVecType&,
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const FieldInVecType&,
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FieldOutType&,
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std::false_type) const
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{
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//this is invalid
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}
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};
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struct PointGradient : public vtkm::worklet::WorkletMapCellToPoint
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{
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typedef void ControlSignature(CellSetIn,
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WholeCellSetIn<Point,Cell>,
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WholeArrayIn<Vec3> pointCoordinates,
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WholeArrayIn<GradientInTypes> inputField,
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FieldOutPoint<GradientOutTypes> outputField);
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typedef void ExecutionSignature(CellCount, CellIndices, WorkIndex, _2, _3, _4, _5);
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typedef _1 InputDomain;
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template <typename FromIndexType,
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typename CellSetInType,
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typename WholeCoordinatesIn,
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typename WholeFieldIn,
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typename FieldOutType>
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VTKM_EXEC void operator()(const vtkm::IdComponent& numCells,
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const FromIndexType& cellIds,
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const vtkm::Id& pointId,
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const CellSetInType& geometry,
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const WholeCoordinatesIn& pointCoordinates,
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const WholeFieldIn& inputField,
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FieldOutType& outputField) const
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{
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//To confirm that we have the proper input and output types we need
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//to verify that input type matches the output vtkm::Vec<T> 'T' type.
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//For example:
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// input is float => output is vtkm::Vec<float>
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// input is vtkm::Vec<float> => output is vtkm::Vec< vtkm::Vec< float > >
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//Grab the dimension tag for the input
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using InValueType = typename WholeFieldIn::ValueType;
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using InDimensionTag = typename TypeTraits<InValueType>::DimensionalityTag;
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//grab the dimension tag for the output component type
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using OutValueType = typename FieldOutType::ComponentType;
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using OutDimensionTag = typename TypeTraits<OutValueType>::DimensionalityTag;
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//Verify that input and output dimension tags match
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using Matches = typename std::is_same<InDimensionTag, OutDimensionTag>::type;
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this->Compute(numCells, cellIds, pointId, geometry, pointCoordinates,
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inputField, outputField, Matches());
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}
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template <typename FromIndexType,
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typename CellSetInType,
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typename WholeCoordinatesIn,
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typename WholeFieldIn,
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typename FieldOutType>
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VTKM_EXEC void Compute(const vtkm::IdComponent& numCells,
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const FromIndexType& cellIds,
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const vtkm::Id& pointId,
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const CellSetInType& geometry,
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const WholeCoordinatesIn& pointCoordinates,
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const WholeFieldIn& inputField,
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FieldOutType& outputField,
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std::true_type) const
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{
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using ThreadIndices = vtkm::exec::arg::ThreadIndicesTopologyMap<CellSetInType>;
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using ValueType = typename WholeFieldIn::ValueType;
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using CellShapeTag = typename CellSetInType::CellShapeTag;
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vtkm::Vec<ValueType, 3> gradient( ValueType(0.0) );
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for (vtkm::IdComponent i = 0; i < numCells; ++i)
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{
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const vtkm::Id cellId = cellIds[i];
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ThreadIndices cellIndices(cellId, cellId, 0, geometry);
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const CellShapeTag cellShape = cellIndices.GetCellShape();
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// compute the parametric coordinates for the current point
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const auto wCoords = this->GetValues(cellIndices, pointCoordinates);
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const auto field = this->GetValues(cellIndices, inputField);
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const vtkm::IdComponent pointIndexForCell =
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this->GetPointIndexForCell(cellIndices, pointId);
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this->ComputeGradient(cellShape, pointIndexForCell, wCoords, field, gradient);
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}
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using BaseGradientType = typename vtkm::BaseComponent<ValueType>::Type;
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const BaseGradientType invNumCells =
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static_cast<BaseGradientType>(1.) /
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static_cast<BaseGradientType>(numCells);
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using OutValueType = typename FieldOutType::ComponentType;
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outputField[0] = static_cast<OutValueType>(gradient[0] * invNumCells);
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outputField[1] = static_cast<OutValueType>(gradient[1] * invNumCells);
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outputField[2] = static_cast<OutValueType>(gradient[2] * invNumCells);
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}
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template <typename FromIndexType,
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typename CellSetInType,
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typename WholeCoordinatesIn,
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typename WholeFieldIn,
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typename FieldOutType>
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VTKM_EXEC void Compute(const vtkm::IdComponent&,
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const FromIndexType&,
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const vtkm::Id&,
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const CellSetInType&,
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const WholeCoordinatesIn&,
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const WholeFieldIn&,
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FieldOutType&,
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std::false_type) const
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{
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//this is invalid, as the input and output types don't match.
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//e.g input is float => output is vtkm::Vec< vtkm::Vec< float > >
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}
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private:
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template <typename CellShapeTag, typename PointCoordVecType,
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typename FieldInVecType, typename OutValueType>
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inline VTKM_EXEC
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void ComputeGradient(CellShapeTag cellShape,
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const vtkm::IdComponent& pointIndexForCell,
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const PointCoordVecType& wCoords,
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const FieldInVecType& field,
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vtkm::Vec<OutValueType, 3>& gradient) const
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{
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vtkm::Vec<vtkm::FloatDefault, 3> pCoords;
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vtkm::exec::ParametricCoordinatesPoint(
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wCoords.GetNumberOfComponents(), pointIndexForCell, pCoords, cellShape, *this);
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//we need to add this to a return value
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gradient += vtkm::exec::CellDerivative(field,
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wCoords, pCoords,
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cellShape, *this);
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}
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template<typename CellSetInType>
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VTKM_EXEC
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vtkm::IdComponent GetPointIndexForCell(
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const vtkm::exec::arg::ThreadIndicesTopologyMap<CellSetInType>& indices,
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vtkm::Id pointId) const
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{
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vtkm::IdComponent result = 0;
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const auto& topo = indices.GetIndicesFrom();
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for (vtkm::IdComponent i = 0; i < topo.GetNumberOfComponents(); ++i)
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{
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if (topo[i] == pointId)
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{
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result = i;
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}
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}
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return result;
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}
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//This is fairly complex so that we can trigger code to extract
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//VecRectilinearPointCoordinates when using structured connectivity, and
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//uniform point coordinates.
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//c++14 would make the return type simply auto
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template<typename CellSetInType, typename WholeFieldIn>
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VTKM_EXEC
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typename vtkm::exec::arg::Fetch<
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vtkm::exec::arg::FetchTagArrayTopologyMapIn,
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vtkm::exec::arg::AspectTagDefault,
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vtkm::exec::arg::ThreadIndicesTopologyMap<CellSetInType>,
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typename WholeFieldIn::PortalType>::ValueType
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GetValues(const vtkm::exec::arg::ThreadIndicesTopologyMap<CellSetInType>& indices,
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const WholeFieldIn& in) const
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{
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//the current problem is that when the topology is structured
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//we are passing in an vtkm::Id when it wants a Id2 or an Id3 that
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//represents the flat index of the topology
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using ExecObjectType = typename WholeFieldIn::PortalType;
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using Fetch = vtkm::exec::arg::Fetch<
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vtkm::exec::arg::FetchTagArrayTopologyMapIn,
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vtkm::exec::arg::AspectTagDefault,
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vtkm::exec::arg::ThreadIndicesTopologyMap<CellSetInType>,
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ExecObjectType>;
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Fetch fetch;
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return fetch.Load(indices,in.GetPortal());
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}
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};
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struct Divergence : public vtkm::worklet::WorkletMapField
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{
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typedef void ControlSignature(FieldIn<GradientVecOutTypes> input,
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FieldOut<Scalar> output);
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typedef void ExecutionSignature(_1,_2);
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typedef _1 InputDomain;
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template<typename InputType, typename OutputType>
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VTKM_EXEC
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void operator()(const InputType &input, OutputType &divergence) const
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{
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divergence = input[0][0]+input[1][1]+input[2][2];
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}
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};
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struct Vorticity : public vtkm::worklet::WorkletMapField
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{
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typedef void ControlSignature(FieldIn<GradientVecOutTypes> input,
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FieldOut<Vec3> output);
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typedef void ExecutionSignature(_1,_2);
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typedef _1 InputDomain;
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template<typename InputType, typename OutputType>
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VTKM_EXEC
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void operator()(const InputType &input, OutputType &vorticity) const
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{
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vorticity[0] = input[2][1] - input[1][2];
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vorticity[1] = input[0][2] - input[2][0];
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vorticity[2] = input[1][0] - input[0][1];
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}
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};
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struct QCriterion : public vtkm::worklet::WorkletMapField
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{
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typedef void ControlSignature(FieldIn<GradientVecOutTypes> input,
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FieldOut<Scalar> output);
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typedef void ExecutionSignature(_1,_2);
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typedef _1 InputDomain;
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template<typename InputType, typename OutputType>
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VTKM_EXEC
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void operator()(const InputType &input, OutputType &qcriterion) const
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{
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OutputType t1 =
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((input[2][1] - input[1][2]) * (input[2][1] - input[1][2]) +
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(input[1][0] - input[0][1]) * (input[1][0] - input[0][1]) +
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(input[0][2] - input[2][0]) * (input[0][2] - input[2][0])) / 2.0f;
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OutputType t2 =
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input[0][0] * input[0][0] + input[1][1] * input[1][1] +
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input[2][2] * input[2][2] +
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((input[1][0] + input[0][1]) * (input[1][0] + input[0][1]) +
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(input[2][0] + input[0][2]) * (input[2][0] + input[0][2]) +
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(input[2][1] + input[1][2]) * (input[2][1] + input[1][2])) / 2.0f;
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qcriterion = (t1 - t2) / 2.0f;
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}
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};
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}
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} // namespace vtkm::worklet
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#endif
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