5498ecd35b
Generally, fields that have a WHOLE_MESH association might be valid even if the structure of the mesh changes. Thus, it makes sense for filters to pass this data pretty much all the time. Also cleaned up some code and comments to make the relationship between `MapFieldOntoOutput` and `DoMapField` more clear.
223 lines
5.7 KiB
C++
223 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 DerivedPolicy>
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inline VTKM_CONT bool ThresholdPoints::MapFieldOntoOutput(
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vtkm::cont::DataSet& result,
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const vtkm::cont::Field& field,
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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 (field.IsFieldPoint())
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{
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if (this->CompactPoints)
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{
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return this->Compactor.MapFieldOntoOutput(result, field, policy);
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}
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else
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{
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result.AddField(field);
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return true;
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}
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}
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else if (field.IsFieldGlobal())
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{
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result.AddField(field);
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return true;
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}
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else
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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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}
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#endif
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