mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 13:23:51 +00:00
72cd0107ee
The version of `Filter::Execute` that takes a policy as an argument is now deprecated. Filters are now able to specify their own fields and types, which is often why you want to customize the policy for an execution. The other reason is that you are compiling VTK-m into some other source that uses a particular types of storage. However, there is now a mechanism in the CMake configuration to allow you to provide a header that customizes the "default" types used in filters. This is a much more convenient way to compile filters for specific types. One thing that filters were not able to do was to customize what cell sets they allowed using. This allows filters to self-select what types of cell sets they support (beyond simply just structured or unstructured). To support this, the lists `SupportedCellSets`, `SupportedStructuredCellSets`, and `SupportedUnstructuredCellSets` have been added to `Filter`. When you apply a policy to a cell set, you now have to also provide the filter.
130 lines
4.4 KiB
C++
130 lines
4.4 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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//
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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_filter_Gradient_hxx
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#define vtk_m_filter_Gradient_hxx
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#include <vtkm/cont/DynamicCellSet.h>
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#include <vtkm/cont/ErrorFilterExecution.h>
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#include <vtkm/worklet/Gradient.h>
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namespace
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{
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//-----------------------------------------------------------------------------
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template <typename T, typename S>
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inline void transpose_3x3(vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Vec<T, 3>, 3>, S>& field)
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{
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vtkm::worklet::gradient::Transpose3x3<T> transpose;
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transpose.Run(field);
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}
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//-----------------------------------------------------------------------------
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template <typename T, typename S>
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inline void transpose_3x3(vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, S>&)
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{ //This is not a 3x3 matrix so no transpose needed
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}
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} //namespace
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namespace vtkm
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{
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namespace filter
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{
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//-----------------------------------------------------------------------------
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template <typename T, typename StorageType, typename DerivedPolicy>
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inline vtkm::cont::DataSet Gradient::DoExecute(
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const vtkm::cont::DataSet& input,
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const vtkm::cont::ArrayHandle<T, StorageType>& inField,
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const vtkm::filter::FieldMetadata& fieldMetadata,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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if (!fieldMetadata.IsPointField())
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{
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throw vtkm::cont::ErrorFilterExecution("Point field expected.");
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}
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constexpr bool isVector = std::is_same<typename vtkm::VecTraits<T>::HasMultipleComponents,
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vtkm::VecTraitsTagMultipleComponents>::value;
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if (GetComputeQCriterion() && !isVector)
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{
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throw vtkm::cont::ErrorFilterExecution("scalar gradients can't generate qcriterion");
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}
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if (GetComputeVorticity() && !isVector)
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{
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throw vtkm::cont::ErrorFilterExecution("scalar gradients can't generate vorticity");
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}
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet();
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const vtkm::cont::CoordinateSystem& coords =
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input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex());
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std::string outputName = this->GetOutputFieldName();
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if (outputName.empty())
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{
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outputName = this->GradientsName;
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}
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//todo: we need to ask the policy what storage type we should be using
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//If the input is implicit, we should know what to fall back to
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vtkm::worklet::GradientOutputFields<T> gradientfields(this->GetComputeGradient(),
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this->GetComputeDivergence(),
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this->GetComputeVorticity(),
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this->GetComputeQCriterion());
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>> outArray;
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if (this->ComputePointGradient)
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{
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vtkm::worklet::PointGradient gradient;
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outArray = gradient.Run(
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vtkm::filter::ApplyPolicyCellSet(cells, policy, *this), coords, inField, gradientfields);
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}
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else
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{
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vtkm::worklet::CellGradient gradient;
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outArray = gradient.Run(
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vtkm::filter::ApplyPolicyCellSet(cells, policy, *this), coords, inField, gradientfields);
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}
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if (!this->RowOrdering)
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{
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transpose_3x3(outArray);
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}
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vtkm::cont::Field::Association fieldAssociation(this->ComputePointGradient
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? vtkm::cont::Field::Association::POINTS
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: vtkm::cont::Field::Association::CELL_SET);
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vtkm::cont::DataSet result;
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result.CopyStructure(input);
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result.AddField(vtkm::cont::Field{ outputName, fieldAssociation, outArray });
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if (this->GetComputeDivergence() && isVector)
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{
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result.AddField(
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vtkm::cont::Field{ this->GetDivergenceName(), fieldAssociation, gradientfields.Divergence });
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}
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if (this->GetComputeVorticity() && isVector)
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{
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result.AddField(
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vtkm::cont::Field{ this->GetVorticityName(), fieldAssociation, gradientfields.Vorticity });
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}
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if (this->GetComputeQCriterion() && isVector)
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{
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result.AddField(
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vtkm::cont::Field{ this->GetQCriterionName(), fieldAssociation, gradientfields.QCriterion });
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}
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return result;
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}
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}
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} // namespace vtkm::filter
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#endif
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