mirror of
https://gitlab.kitware.com/vtk/vtk-m
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8d04796b1f
Basically we can run the gradient worklet and compute the Divergence, Vorticity, and QCriterion without ever having to store the gradient tensor in global memory
74 lines
2.4 KiB
C++
74 lines
2.4 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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#ifndef vtk_m_worklet_gradient_CellGradient_h
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#define vtk_m_worklet_gradient_CellGradient_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 CellGradientInType : vtkm::ListTagBase<T>
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{
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};
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template <typename T>
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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<CellGradientInType<T>> inputField,
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GradientOutputs outputFields);
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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,
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typename PointCoordVecType,
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typename FieldInVecType,
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typename GradientOutType>
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VTKM_EXEC void operator()(CellTagType shape,
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vtkm::IdComponent pointCount,
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const PointCoordVecType& wCoords,
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const FieldInVecType& field,
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GradientOutType& outputGradient) 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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outputGradient = vtkm::exec::CellDerivative(field, wCoords, center, shape, *this);
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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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