mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-06 10:29:00 +00:00
311618a15f
This will make VTK-m warning level match the one used by VTK. This commit also resolves the first round of warnings that W4 exposes.
168 lines
6.4 KiB
C++
168 lines
6.4 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_gradient_PointGradient_h
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#define vtk_m_worklet_gradient_PointGradient_h
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#include <vtkm/exec/CellDerivative.h>
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#include <vtkm/exec/ParametricCoordinates.h>
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#include <vtkm/worklet/WorkletMapTopology.h>
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#include <vtkm/worklet/gradient/GradientOutput.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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namespace gradient
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{
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template <typename T>
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struct PointGradientInType : vtkm::ListTagBase<T>
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{
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};
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template <typename T>
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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<PointGradientInType<T>> inputField,
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GradientOutputs outputFields);
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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 GradientOutType>
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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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GradientOutType& outputGradient) const
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{
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using CellThreadIndices = 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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CellThreadIndices 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 = this->GetPointIndexForCell(cellIndices, pointId);
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this->ComputeGradient(cellShape, pointIndexForCell, wCoords, field, gradient);
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}
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if (numCells != 0)
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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.) / static_cast<BaseGradientType>(numCells);
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gradient[0] = gradient[0] * invNumCells;
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gradient[1] = gradient[1] * invNumCells;
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gradient[2] = gradient[2] * invNumCells;
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}
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outputGradient = gradient;
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}
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private:
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template <typename CellShapeTag,
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typename PointCoordVecType,
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typename FieldInVecType,
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typename OutValueType>
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inline VTKM_EXEC 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, wCoords, pCoords, cellShape, *this);
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}
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template <typename CellSetInType>
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VTKM_EXEC 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<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<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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}
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}
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}
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#endif
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