4cb392ca24
Before it was a DynamicCellSetBase<VTKM_DEFAULT_CELL_SET_LIST>. This change causes some calls to templated DynamicCellSetBase arguments to fail to resolve, but there were only 4 in the code base. In exchange, DynamicCellSet requires a lot less characters in its symbol.
164 lines
6.0 KiB
C++
164 lines
6.0 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_cont_CellLocatorChooser_h
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#define vtk_m_cont_CellLocatorChooser_h
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#include <vtkm/cont/CastAndCall.h>
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#include <vtkm/cont/CellLocatorRectilinearGrid.h>
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#include <vtkm/cont/CellLocatorTwoLevel.h>
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#include <vtkm/cont/CellLocatorUniformGrid.h>
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#include <vtkm/cont/CellSetStructured.h>
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#include <vtkm/cont/DataSet.h>
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namespace vtkm
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{
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namespace cont
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{
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namespace detail
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{
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template <typename CellSetType, typename CoordinateSystemArrayType>
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struct CellLocatorChooserImpl
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{
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using type = vtkm::cont::CellLocatorTwoLevel;
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};
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using UniformArray = vtkm::cont::ArrayHandleUniformPointCoordinates;
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template <>
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struct CellLocatorChooserImpl<vtkm::cont::CellSetStructured<3>, UniformArray>
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{
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using type = vtkm::cont::CellLocatorUniformGrid;
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};
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using RectilinearArray =
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vtkm::cont::ArrayHandleCartesianProduct<vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>>;
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template <>
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struct CellLocatorChooserImpl<vtkm::cont::CellSetStructured<3>, RectilinearArray>
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{
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using type = vtkm::cont::CellLocatorRectilinearGrid;
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};
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} // namespace detail
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/// \brief A template to select an appropriate CellLocator based on CellSet type.
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///
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/// Given a concrete type for a `CellSet` subclass and a type of `ArrayHandle` for the
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/// coordinate system, `CellLocatorChooser` picks an appropriate `CellLocator` for that
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/// type of grid. It is a convenient class to use when you can resolve your templates
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/// to discover the type of data set being used for location.
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///
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template <typename CellSetType, typename CoordinateSystemArrayType>
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using CellLocatorChooser =
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typename detail::CellLocatorChooserImpl<CellSetType, CoordinateSystemArrayType>::type;
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namespace detail
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{
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struct CastAndCallCellLocatorChooserFunctor
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{
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template <typename CellLocatorType, typename Functor, typename... Args>
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void CallFunctorWithLocator(const vtkm::cont::DynamicCellSet& cellSet,
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const vtkm::cont::CoordinateSystem& coordinateSystem,
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Functor&& functor,
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Args&&... args) const
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{
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CellLocatorType locator;
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locator.SetCellSet(cellSet);
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locator.SetCoordinates(coordinateSystem);
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functor(locator, std::forward<Args>(args)...);
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}
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template <typename CellSetType, typename Functor, typename... Args>
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void operator()(const CellSetType& cellSet,
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const vtkm::cont::CoordinateSystem& coordinateSystem,
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Functor&& functor,
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Args&&... args) const
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{
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this->CallFunctorWithLocator<vtkm::cont::CellLocatorTwoLevel>(
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cellSet, coordinateSystem, 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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void operator()(const vtkm::cont::CellSetStructured<3>& cellSet,
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const vtkm::cont::CoordinateSystem& coordinateSystem,
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Functor&& functor,
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Args&&... args) const
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{
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auto coordArray = coordinateSystem.GetData();
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if (coordArray.IsType<detail::UniformArray>())
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{
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this->CallFunctorWithLocator<vtkm::cont::CellLocatorUniformGrid>(
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cellSet, coordinateSystem, std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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else if (coordArray.IsType<detail::RectilinearArray>())
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{
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this->CallFunctorWithLocator<vtkm::cont::CellLocatorRectilinearGrid>(
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cellSet, coordinateSystem, std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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else
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{
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this->CallFunctorWithLocator<vtkm::cont::CellLocatorTwoLevel>(
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cellSet, coordinateSystem, std::forward<Functor>(functor), std::forward<Args>(args)...);
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}
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}
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};
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} // namespace detail
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/// \brief Calls a functor with the appropriate type of `CellLocator`.
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///
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/// Given a cell set and a coordinate system of unknown types, calls a functor with an appropriate
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/// CellLocator of the given type. The CellLocator is populated with the provided cell set and
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/// coordinate system.
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///
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/// Any additional args are passed to the functor.
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///
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template <typename CellSetType, typename Functor, typename... Args>
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VTKM_CONT void CastAndCallCellLocatorChooser(const CellSetType& cellSet,
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const vtkm::cont::CoordinateSystem& coordinateSystem,
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Functor&& functor,
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Args&&... args)
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{
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vtkm::cont::CastAndCall(cellSet,
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detail::CastAndCallCellLocatorChooserFunctor{},
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coordinateSystem,
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std::forward<Functor>(functor),
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std::forward<Args>(args)...);
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}
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/// \brief Calls a functor with the appropriate type of `CellLocator`.
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///
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/// Given a `DataSet`, calls a functor with an appropriate CellLocator of the given type.
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/// The CellLocator is populated with the provided cell set and coordinate system.
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///
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/// Any additional args are passed to the functor.
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///
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template <typename Functor, typename... Args>
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VTKM_CONT void CastAndCallCellLocatorChooser(const vtkm::cont::DataSet& dataSet,
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Functor&& functor,
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Args&&... args)
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{
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CastAndCallCellLocatorChooser(dataSet.GetCellSet(),
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dataSet.GetCoordinateSystem(),
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std::forward<Functor>(functor),
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std::forward<Args>(args)...);
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}
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_CellLocatorChooser_h
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