vtk-m/vtkm/filter/Threshold.hxx
Kenneth Moreland 5fa02057ae Rely less on overload resolution for ApplyPolicy
Previously, all the ApplyPolicy functions had the same name and used
template resolution to figure out which one to use. This was pretty
clear at first when there was just one for fields and one for cell sets.
But then it grew to several different types, particularly for fields. It
was hard to look at the code and figure out which form of ApplyPolicy
was being used, and compilers were starting to get confused.

Resolve the problem by giving all the methods unique names to make it
clear which one you expect to be called.
2019-09-09 16:08:11 -06:00

102 lines
3.1 KiB
C++

//============================================================================
// Copyright (c) Kitware, Inc.
// All rights reserved.
// See LICENSE.txt for details.
//
// This software is distributed WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE. See the above copyright notice for more information.
//============================================================================
#include <vtkm/cont/ArrayHandleCounting.h>
#include <vtkm/cont/ArrayHandlePermutation.h>
#include <vtkm/cont/CellSetPermutation.h>
#include <vtkm/cont/DynamicCellSet.h>
namespace
{
class ThresholdRange
{
public:
VTKM_CONT
ThresholdRange(const vtkm::Float64& lower, const vtkm::Float64& upper)
: Lower(lower)
, Upper(upper)
{
}
template <typename T>
VTKM_EXEC bool operator()(const T& value) const
{
return value >= static_cast<T>(this->Lower) && value <= static_cast<T>(this->Upper);
}
private:
vtkm::Float64 Lower;
vtkm::Float64 Upper;
};
} // end anon namespace
namespace vtkm
{
namespace filter
{
//-----------------------------------------------------------------------------
inline VTKM_CONT Threshold::Threshold()
: vtkm::filter::FilterDataSetWithField<Threshold>()
, LowerValue(0)
, UpperValue(0)
{
}
//-----------------------------------------------------------------------------
template <typename T, typename StorageType, typename DerivedPolicy>
inline VTKM_CONT vtkm::cont::DataSet Threshold::DoExecute(
const vtkm::cont::DataSet& input,
const vtkm::cont::ArrayHandle<T, StorageType>& field,
const vtkm::filter::FieldMetadata& fieldMeta,
vtkm::filter::PolicyBase<DerivedPolicy> policy)
{
//get the cells and coordinates of the dataset
const vtkm::cont::DynamicCellSet& cells = input.GetCellSet();
ThresholdRange predicate(this->GetLowerThreshold(), this->GetUpperThreshold());
vtkm::cont::DynamicCellSet cellOut = this->Worklet.Run(
vtkm::filter::ApplyPolicyCellSet(cells, policy), field, fieldMeta.GetAssociation(), predicate);
vtkm::cont::DataSet output;
output.SetCellSet(cellOut);
output.AddCoordinateSystem(input.GetCoordinateSystem(this->GetActiveCoordinateSystemIndex()));
return output;
}
//-----------------------------------------------------------------------------
template <typename T, typename StorageType, typename DerivedPolicy>
inline VTKM_CONT bool Threshold::DoMapField(vtkm::cont::DataSet& result,
const vtkm::cont::ArrayHandle<T, StorageType>& input,
const vtkm::filter::FieldMetadata& fieldMeta,
vtkm::filter::PolicyBase<DerivedPolicy>)
{
if (fieldMeta.IsPointField())
{
//we copy the input handle to the result dataset, reusing the metadata
result.AddField(fieldMeta.AsField(input));
return true;
}
else if (fieldMeta.IsCellField())
{
vtkm::cont::ArrayHandle<T> out = this->Worklet.ProcessCellField(input);
result.AddField(fieldMeta.AsField(out));
return true;
}
else
{
return false;
}
}
}
}