c802adcbeb
The `FilterField` class provides convenience functions for subclasses to determine the `ArrayHandle` type for scalar and vector fields. However, you needed to know the specific size of vectors. For filters that support an input field of any type, a new form, `CastAndCallVariableVecField` has been added. This calls the underlying functor with an `ArrayHandleRecombineVec` of the appropriate component type. The `CastAndaCallVariableVecField` method also reduces the number of instances created by having a float fallback for any component type that does not satisfy the field types.
388 lines
16 KiB
C++
388 lines
16 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_FilterField_h
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#define vtk_m_filter_FilterField_h
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#include <vtkm/filter/Filter.h>
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#include <vtkm/cont/ArrayCopy.h>
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namespace vtkm
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{
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namespace filter
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{
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class VTKM_FILTER_CORE_EXPORT FilterField : public vtkm::filter::Filter
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{
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public:
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FilterField() { this->SetActiveCoordinateSystem(0); }
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VTKM_CONT
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void SetOutputFieldName(const std::string& name) { this->OutputFieldName = name; }
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VTKM_CONT
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const std::string& GetOutputFieldName() const { return this->OutputFieldName; }
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///@{
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/// Choose the field to operate on. Note, if
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/// `this->UseCoordinateSystemAsField` is true, then the active field is not used.
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VTKM_CONT
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void SetActiveField(
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const std::string& name,
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vtkm::cont::Field::Association association = vtkm::cont::Field::Association::Any)
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{
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this->SetActiveField(0, name, association);
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}
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void SetActiveField(
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vtkm::IdComponent index,
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const std::string& name,
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vtkm::cont::Field::Association association = vtkm::cont::Field::Association::Any)
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{
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auto index_st = static_cast<std::size_t>(index);
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this->ResizeIfNeeded(index_st);
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this->ActiveFieldNames[index_st] = name;
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this->ActiveFieldAssociation[index_st] = association;
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}
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VTKM_CONT const std::string& GetActiveFieldName(vtkm::IdComponent index = 0) const
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{
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VTKM_ASSERT((index >= 0) &&
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(index < static_cast<vtkm::IdComponent>(this->ActiveFieldNames.size())));
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return this->ActiveFieldNames[index];
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}
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VTKM_CONT vtkm::cont::Field::Association GetActiveFieldAssociation(
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vtkm::IdComponent index = 0) const
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{
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return this->ActiveFieldAssociation[index];
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}
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///@}
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///@{
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/// Select the coordinate system coord_idx to make active to use when processing the input
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/// DataSet. This is used primarily by the Filter to select the coordinate system
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/// to use as a field when \c UseCoordinateSystemAsField is true.
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VTKM_CONT
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void SetActiveCoordinateSystem(vtkm::Id coord_idx)
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{
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this->SetActiveCoordinateSystem(0, coord_idx);
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}
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VTKM_CONT
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void SetActiveCoordinateSystem(vtkm::IdComponent index, vtkm::Id coord_idx)
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{
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auto index_st = static_cast<std::size_t>(index);
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this->ResizeIfNeeded(index_st);
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this->ActiveCoordinateSystemIndices[index_st] = coord_idx;
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}
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VTKM_CONT
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vtkm::Id GetActiveCoordinateSystemIndex() const
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{
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return this->GetActiveCoordinateSystemIndex(0);
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}
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VTKM_CONT
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vtkm::Id GetActiveCoordinateSystemIndex(vtkm::IdComponent index) const
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{
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auto index_st = static_cast<std::size_t>(index);
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return this->ActiveCoordinateSystemIndices[index_st];
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}
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///@}
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///@{
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/// To simply use the active coordinate system as the field to operate on, set
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/// UseCoordinateSystemAsField to true.
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VTKM_CONT
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void SetUseCoordinateSystemAsField(bool val) { SetUseCoordinateSystemAsField(0, val); }
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VTKM_CONT
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void SetUseCoordinateSystemAsField(vtkm::IdComponent index, bool val)
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{
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auto index_st = static_cast<std::size_t>(index);
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this->ResizeIfNeeded(index_st);
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this->UseCoordinateSystemAsField[index] = val;
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}
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VTKM_CONT
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bool GetUseCoordinateSystemAsField(vtkm::IdComponent index = 0) const
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{
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VTKM_ASSERT((index >= 0) &&
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(index < static_cast<vtkm::IdComponent>(this->ActiveFieldNames.size())));
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return this->UseCoordinateSystemAsField[index];
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}
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///@}
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/// \brief Return the number of active fields currently set.
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///
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/// The general interface to `FilterField` allows a user to set an arbitrary number
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/// of active fields (indexed 0 and on). This method returns the number of active
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/// fields that are set. Note that the filter implementation is free to ignore
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/// any active fields it does not support. Also note that an active field can be
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/// set to be either a named field or a coordinate system.
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vtkm::IdComponent GetNumberOfActiveFields() const
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{
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VTKM_ASSERT(this->ActiveFieldNames.size() == this->UseCoordinateSystemAsField.size());
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return static_cast<vtkm::IdComponent>(this->UseCoordinateSystemAsField.size());
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}
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protected:
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VTKM_CONT
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const vtkm::cont::Field& GetFieldFromDataSet(const vtkm::cont::DataSet& input) const
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{
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return this->GetFieldFromDataSet(0, input);
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}
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VTKM_CONT
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const vtkm::cont::Field& GetFieldFromDataSet(vtkm::IdComponent index,
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const vtkm::cont::DataSet& input) const
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{
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if (this->UseCoordinateSystemAsField[index])
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{
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// Note that we cannot use input.GetCoordinateSystem because that does not return
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// a reference to a field. Instead, get the field name for the coordinate system
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// and return the field.
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const std::string& coordSystemName =
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input.GetCoordinateSystemName(this->GetActiveCoordinateSystemIndex(index));
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return input.GetPointField(coordSystemName);
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}
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else
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{
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return input.GetField(this->GetActiveFieldName(index),
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this->GetActiveFieldAssociation(index));
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}
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}
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///@{
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/// \brief Convenience method to get the array from a filter's input scalar field.
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///
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/// A field filter typically gets its input fields using the internal `GetFieldFromDataSet`.
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/// To use this field in a worklet, it eventually needs to be converted to an
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/// `ArrayHandle`. If the input field is limited to be a scalar field, then this method
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/// provides a convenient way to determine the correct array type. Like other `CastAndCall`
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/// methods, it takes as input a `Field` (or `UnknownArrayHandle`) and a function/functor
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/// to call with the appropriate `ArrayHandle` type.
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///
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template <typename Functor, typename... Args>
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VTKM_CONT void CastAndCallScalarField(const vtkm::cont::UnknownArrayHandle& fieldArray,
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Functor&& functor,
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Args&&... args) const
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{
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fieldArray
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.CastAndCallForTypesWithFloatFallback<vtkm::TypeListFieldScalar, VTKM_DEFAULT_STORAGE_LIST>(
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std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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template <typename Functor, typename... Args>
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VTKM_CONT void CastAndCallScalarField(const vtkm::cont::Field& field,
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Functor&& functor,
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Args&&... args) const
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{
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this->CastAndCallScalarField(
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field.GetData(), std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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///@}
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private:
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template <vtkm::IdComponent VecSize>
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struct ScalarToVec
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{
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template <typename T>
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using type = vtkm::Vec<T, VecSize>;
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};
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protected:
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///@{
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/// \brief Convenience method to get the array from a filter's input vector field.
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///
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/// A field filter typically gets its input fields using the internal `GetFieldFromDataSet`.
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/// To use this field in a worklet, it eventually needs to be converted to an
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/// `ArrayHandle`. If the input field is limited to be a vector field with vectors of a
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/// specific size, then this method provides a convenient way to determine the correct array
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/// type. Like other `CastAndCall` methods, it takes as input a `Field` (or
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/// `UnknownArrayHandle`) and a function/functor to call with the appropriate `ArrayHandle`
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/// type. You also have to provide the vector size as the first template argument.
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/// For example `CastAndCallVecField<3>(field, functor);`.
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///
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template <vtkm::IdComponent VecSize, typename Functor, typename... Args>
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VTKM_CONT void CastAndCallVecField(const vtkm::cont::UnknownArrayHandle& fieldArray,
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Functor&& functor,
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Args&&... args) const
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{
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using VecList =
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vtkm::ListTransform<vtkm::TypeListFieldScalar, ScalarToVec<VecSize>::template type>;
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fieldArray.CastAndCallForTypesWithFloatFallback<VecList, VTKM_DEFAULT_STORAGE_LIST>(
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std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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template <vtkm::IdComponent VecSize, typename Functor, typename... Args>
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VTKM_CONT void CastAndCallVecField(const vtkm::cont::Field& field,
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Functor&& functor,
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Args&&... args) const
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{
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this->CastAndCallVecField<VecSize>(
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field.GetData(), std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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///@}
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///@{
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/// This method is like `CastAndCallVecField` except that it can be used for a
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/// field of unknown vector size (or scalars). This method will call the given
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/// functor with an `ArrayHandleRecombineVec`.
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///
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/// Note that there are limitations with using `ArrayHandleRecombineVec` within a
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/// worklet. Because the size of the vectors are not known at compile time, you
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/// cannot just create an intermediate `Vec` of the correct size. Typically, you
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/// must allocate the output array (for example, with `ArrayHandleRuntimeVec`), and
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/// the worklet must iterate over the components and store them in the prealocated
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/// output.
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///
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template <typename Functor, typename... Args>
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VTKM_CONT void CastAndCallVariableVecField(const vtkm::cont::UnknownArrayHandle& fieldArray,
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Functor&& functor,
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Args&&... args) const
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{
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if (fieldArray.IsBaseComponentType<vtkm::Float32>())
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{
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functor(fieldArray.ExtractArrayFromComponents<vtkm::Float32>(), std::forward<Args>(args)...);
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}
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else if (fieldArray.IsBaseComponentType<vtkm::Float64>())
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{
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functor(fieldArray.ExtractArrayFromComponents<vtkm::Float64>(), std::forward<Args>(args)...);
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}
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else
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{
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// Field component type is not directly supported. Copy to floating point array.
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vtkm::cont::UnknownArrayHandle floatArray = fieldArray.NewInstanceFloatBasic();
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vtkm::cont::ArrayCopy(fieldArray, floatArray);
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functor(floatArray.ExtractArrayFromComponents<vtkm::FloatDefault>(),
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std::forward<Args>(args)...);
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}
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}
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template <typename Functor, typename... Args>
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VTKM_CONT void CastAndCallVariableVecField(const vtkm::cont::Field& field,
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Functor&& functor,
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Args&&... args) const
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{
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this->CastAndCallVariableVecField(
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field.GetData(), std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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///@}
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/// \brief Create the output data set for `DoExecute`
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///
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/// This form of `CreateResult` will create an output data set with the same cell
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/// structure and coordinate system as the input and pass all fields (as requested
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/// by the `Filter` state). Additionally, it will add the provided field to the
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/// result.
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///
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/// \param[in] inDataSet The input data set being modified (usually the one passed
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/// into `DoExecute`). The returned `DataSet` is filled with fields of `inDataSet`
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/// (as selected by the `FieldsToPass` state of the filter).
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/// \param[in] resultField A `Field` that is added to the returned `DataSet`.
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///
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VTKM_CONT vtkm::cont::DataSet CreateResultField(const vtkm::cont::DataSet& inDataSet,
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const vtkm::cont::Field& resultField) const;
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/// \brief Create the output data set for `DoExecute`
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///
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/// This form of `CreateResult` will create an output data set with the same cell
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/// structure and coordinate system as the input and pass all fields (as requested
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/// by the `Filter` state). Additionally, it will add a field matching the provided
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/// specifications to the result.
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///
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/// \param[in] inDataSet The input data set being modified (usually the one passed
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/// into `DoExecute`). The returned `DataSet` is filled with fields of `inDataSet`
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/// (as selected by the `FieldsToPass` state of the filter).
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/// \param[in] resultFieldName The name of the field added to the returned `DataSet`.
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/// \param[in] resultFieldAssociation The association of the field (e.g. point or cell)
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/// added to the returned `DataSet`.
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/// \param[in] resultFieldArray An array containing the data for the field added to the
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/// returned `DataSet`.
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///
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VTKM_CONT vtkm::cont::DataSet CreateResultField(
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const vtkm::cont::DataSet& inDataSet,
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const std::string& resultFieldName,
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vtkm::cont::Field::Association resultFieldAssociation,
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const vtkm::cont::UnknownArrayHandle& resultFieldArray) const
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{
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return this->CreateResultField(
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inDataSet, vtkm::cont::Field{ resultFieldName, resultFieldAssociation, resultFieldArray });
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}
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/// \brief Create the output data set for `DoExecute`
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///
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/// This form of `CreateResult` will create an output data set with the same cell
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/// structure and coordinate system as the input and pass all fields (as requested
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/// by the `Filter` state). Additionally, it will add a point field matching the
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/// provided specifications to the result.
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///
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/// \param[in] inDataSet The input data set being modified (usually the one passed
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/// into `DoExecute`). The returned `DataSet` is filled with fields of `inDataSet`
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/// (as selected by the `FieldsToPass` state of the filter).
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/// \param[in] resultFieldName The name of the field added to the returned `DataSet`.
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/// \param[in] resultFieldArray An array containing the data for the field added to the
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/// returned `DataSet`.
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///
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VTKM_CONT vtkm::cont::DataSet CreateResultFieldPoint(
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const vtkm::cont::DataSet& inDataSet,
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const std::string& resultFieldName,
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const vtkm::cont::UnknownArrayHandle& resultFieldArray) const
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{
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return this->CreateResultField(inDataSet,
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vtkm::cont::Field{ resultFieldName,
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vtkm::cont::Field::Association::Points,
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resultFieldArray });
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}
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/// \brief Create the output data set for `DoExecute`
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///
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/// This form of `CreateResult` will create an output data set with the same cell
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/// structure and coordinate system as the input and pass all fields (as requested
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/// by the `Filter` state). Additionally, it will add a cell field matching the
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/// provided specifications to the result.
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///
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/// \param[in] inDataSet The input data set being modified (usually the one passed
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/// into `DoExecute`). The returned `DataSet` is filled with fields of `inDataSet`
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/// (as selected by the `FieldsToPass` state of the filter).
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/// \param[in] resultFieldName The name of the field added to the returned `DataSet`.
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/// \param[in] resultFieldArray An array containing the data for the field added to the
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/// returned `DataSet`.
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///
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VTKM_CONT vtkm::cont::DataSet CreateResultFieldCell(
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const vtkm::cont::DataSet& inDataSet,
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const std::string& resultFieldName,
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const vtkm::cont::UnknownArrayHandle& resultFieldArray) const
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{
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return this->CreateResultField(inDataSet,
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vtkm::cont::Field{ resultFieldName,
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vtkm::cont::Field::Association::Cells,
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resultFieldArray });
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}
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private:
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void ResizeIfNeeded(size_t index_st);
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std::string OutputFieldName;
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std::vector<std::string> ActiveFieldNames;
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std::vector<vtkm::cont::Field::Association> ActiveFieldAssociation;
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std::vector<bool> UseCoordinateSystemAsField;
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std::vector<vtkm::Id> ActiveCoordinateSystemIndices;
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};
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} // namespace filter
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} // namespace vtkm
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#endif // vtk_m_filter_FilterField_h
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