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.
217 lines
5.7 KiB
C++
217 lines
5.7 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_ThresholdPoints_hxx
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#define vtk_m_filter_ThresholdPoints_hxx
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#include <vtkm/cont/ErrorFilterExecution.h>
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namespace
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{
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// Predicate for values less than minimum
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class ValuesBelow
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{
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public:
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VTKM_CONT
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ValuesBelow(const vtkm::Float64& value)
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: Value(value)
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{
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}
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template <typename ScalarType>
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VTKM_EXEC bool operator()(const ScalarType& value) const
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{
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return value <= static_cast<ScalarType>(this->Value);
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}
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private:
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vtkm::Float64 Value;
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};
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// Predicate for values greater than maximum
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class ValuesAbove
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{
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public:
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VTKM_CONT
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ValuesAbove(const vtkm::Float64& value)
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: Value(value)
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{
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}
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template <typename ScalarType>
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VTKM_EXEC bool operator()(const ScalarType& value) const
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{
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return value >= static_cast<ScalarType>(this->Value);
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}
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private:
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vtkm::Float64 Value;
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};
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// Predicate for values between minimum and maximum
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class ValuesBetween
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{
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public:
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VTKM_CONT
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ValuesBetween(const vtkm::Float64& lower, const vtkm::Float64& upper)
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: Lower(lower)
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, Upper(upper)
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{
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}
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template <typename ScalarType>
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VTKM_EXEC bool operator()(const ScalarType& value) const
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{
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return value >= static_cast<ScalarType>(this->Lower) &&
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value <= static_cast<ScalarType>(this->Upper);
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}
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private:
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vtkm::Float64 Lower;
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vtkm::Float64 Upper;
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};
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}
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namespace vtkm
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{
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namespace filter
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{
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const int THRESHOLD_BELOW = 0;
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const int THRESHOLD_ABOVE = 1;
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const int THRESHOLD_BETWEEN = 2;
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//-----------------------------------------------------------------------------
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inline VTKM_CONT ThresholdPoints::ThresholdPoints()
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: vtkm::filter::FilterDataSetWithField<ThresholdPoints>()
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, LowerValue(0)
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, UpperValue(0)
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, ThresholdType(THRESHOLD_BETWEEN)
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, CompactPoints(false)
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{
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}
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//-----------------------------------------------------------------------------
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inline VTKM_CONT void ThresholdPoints::SetThresholdBelow(const vtkm::Float64 value)
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{
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this->SetLowerThreshold(value);
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this->SetUpperThreshold(value);
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this->ThresholdType = THRESHOLD_BELOW;
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}
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inline VTKM_CONT void ThresholdPoints::SetThresholdAbove(const vtkm::Float64 value)
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{
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this->SetLowerThreshold(value);
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this->SetUpperThreshold(value);
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this->ThresholdType = THRESHOLD_ABOVE;
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}
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inline VTKM_CONT void ThresholdPoints::SetThresholdBetween(const vtkm::Float64 value1,
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const vtkm::Float64 value2)
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{
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this->SetLowerThreshold(value1);
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this->SetUpperThreshold(value2);
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this->ThresholdType = THRESHOLD_BETWEEN;
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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 vtkm::cont::DataSet ThresholdPoints::DoExecute(
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const vtkm::cont::DataSet& input,
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const vtkm::cont::ArrayHandle<T, StorageType>& field,
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const vtkm::filter::FieldMetadata& fieldMeta,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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// extract the input cell set
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const vtkm::cont::DynamicCellSet& cells = input.GetCellSet();
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// field to threshold on must be a point field
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if (fieldMeta.IsPointField() == false)
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{
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throw vtkm::cont::ErrorFilterExecution("Point field expected.");
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}
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// run the worklet on the cell set and input field
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vtkm::cont::CellSetSingleType<> outCellSet;
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vtkm::worklet::ThresholdPoints worklet;
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switch (this->ThresholdType)
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{
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case THRESHOLD_BELOW:
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{
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outCellSet = worklet.Run(vtkm::filter::ApplyPolicyCellSet(cells, policy, *this),
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field,
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ValuesBelow(this->GetLowerThreshold()));
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break;
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}
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case THRESHOLD_ABOVE:
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{
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outCellSet = worklet.Run(vtkm::filter::ApplyPolicyCellSet(cells, policy, *this),
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field,
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ValuesAbove(this->GetUpperThreshold()));
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break;
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}
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case THRESHOLD_BETWEEN:
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default:
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{
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outCellSet = worklet.Run(vtkm::filter::ApplyPolicyCellSet(cells, policy, *this),
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field,
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ValuesBetween(this->GetLowerThreshold(), this->GetUpperThreshold()));
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break;
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}
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}
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// create the output dataset
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vtkm::cont::DataSet output;
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output.SetCellSet(outCellSet);
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output.AddCoordinateSystem(input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex()));
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// compact the unused points in the output dataset
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if (this->CompactPoints)
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{
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this->Compactor.SetCompactPointFields(true);
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this->Compactor.SetMergePoints(true);
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return this->Compactor.Execute(output);
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}
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else
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{
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return output;
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}
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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 bool ThresholdPoints::DoMapField(
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vtkm::cont::DataSet& result,
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const vtkm::cont::ArrayHandle<T, StorageType>& input,
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const vtkm::filter::FieldMetadata& fieldMeta,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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// point data is copied as is because it was not collapsed
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if (fieldMeta.IsPointField())
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{
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if (this->CompactPoints)
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{
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return this->Compactor.DoMapField(result, input, fieldMeta, policy);
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}
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else
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{
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result.AddField(fieldMeta.AsField(input));
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return true;
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}
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}
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// cell data does not apply
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return false;
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}
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}
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}
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#endif
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