186 lines
5.4 KiB
C++
186 lines
5.4 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_internal_PointLocatorBase_h
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#define vtk_m_cont_internal_PointLocatorBase_h
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#include <vtkm/cont/vtkm_cont_export.h>
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#include <vtkm/Types.h>
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#include <vtkm/cont/CoordinateSystem.h>
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#include <vtkm/cont/DynamicCellSet.h>
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#include <vtkm/cont/ExecutionObjectBase.h>
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#ifndef VTKM_NO_DEPRECATED_VIRTUAL
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#include <vtkm/cont/PointLocator.h>
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#include <vtkm/cont/VirtualObjectHandle.h>
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#include <vtkm/exec/PointLocator.h>
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#endif //!VTKM_NO_DEPRECATED_VIRTUAL
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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 internal
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{
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namespace detail
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{
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#ifndef VTKM_NO_DEPRECATED_VIRTUAL
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VTKM_DEPRECATED_SUPPRESS_BEGIN
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// Wrong namespace, but it's only for deprecated code.
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template <typename LocatorType>
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class VTKM_ALWAYS_EXPORT PointLocatorBaseExecWrapper : public vtkm::exec::PointLocator
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{
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LocatorType Locator;
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public:
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VTKM_CONT PointLocatorBaseExecWrapper(const LocatorType& locator)
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: Locator(locator)
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{
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}
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VTKM_EXEC_CONT virtual ~PointLocatorBaseExecWrapper() noexcept override
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{
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// This must not be defaulted, since defaulted virtual destructors are
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// troublesome with CUDA __host__ __device__ markup.
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}
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VTKM_EXEC void FindNearestNeighbor(const vtkm::Vec3f& queryPoint,
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vtkm::Id& pointId,
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vtkm::FloatDefault& distanceSquared) const override
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{
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return this->Locator.FindNearestNeighbor(queryPoint, pointId, distanceSquared);
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}
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};
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template <typename LocatorType>
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struct PointLocatorBaseWrapperPrepareForExecutionFunctor
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{
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template <typename Device>
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VTKM_CONT bool operator()(Device device,
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vtkm::cont::VirtualObjectHandle<vtkm::exec::PointLocator>& execHandle,
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const LocatorType& locator,
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vtkm::cont::Token& token)
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{
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auto execObject = locator.PrepareForExecution(device, token);
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using WrapType = PointLocatorBaseExecWrapper<decltype(execObject)>;
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execHandle.Reset(new WrapType(execObject));
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return true;
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}
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};
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template <typename Derived>
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class VTKM_ALWAYS_EXPORT PointLocatorBaseWrapper : public vtkm::cont::PointLocator
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{
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Derived Locator;
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mutable vtkm::cont::VirtualObjectHandle<vtkm::exec::PointLocator> ExecutionObjectHandle;
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public:
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PointLocatorBaseWrapper() = default;
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PointLocatorBaseWrapper(const Derived& locator)
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: Locator(locator)
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{
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this->SetCoordinates(locator.GetCoordinates());
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}
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VTKM_CONT const vtkm::exec::PointLocator* PrepareForExecution(
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vtkm::cont::DeviceAdapterId device,
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vtkm::cont::Token& token) const override
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{
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const bool success =
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vtkm::cont::TryExecuteOnDevice(device,
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PointLocatorBaseWrapperPrepareForExecutionFunctor<Derived>{},
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this->ExecutionObjectHandle,
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this->Locator,
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token);
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if (!success)
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{
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throwFailedRuntimeDeviceTransfer("PointLocatorWrapper", device);
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}
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return this->ExecutionObjectHandle.PrepareForExecution(device, token);
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}
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private:
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void Build() override
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{
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this->Locator.SetCoordinates(this->GetCoordinates());
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this->Locator.Update();
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}
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};
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VTKM_DEPRECATED_SUPPRESS_END
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#endif //!VTKM_NO_DEPRECATED_VIRTUAL
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} // namespace detail
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/// \brief Base class for all `PointLocator` classes.
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///
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/// `PointLocatorBase` uses the curiously recurring template pattern (CRTP). Subclasses
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/// must provide their own type for the template parameter. Subclasses must implement
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/// `Build` and `PrepareForExecution` methods.
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///
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template <typename Derived>
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class VTKM_ALWAYS_EXPORT PointLocatorBase : public vtkm::cont::ExecutionObjectBase
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{
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public:
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#ifndef VTKM_NO_DEPRECATED_VIRTUAL
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VTKM_DEPRECATED_SUPPRESS_BEGIN
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// Support deprecated classes
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operator detail::PointLocatorBaseWrapper<Derived>() const
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{
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return detail::PointLocatorBaseWrapper<Derived>(reinterpret_cast<const Derived&>(*this));
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}
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VTKM_DEPRECATED_SUPPRESS_END
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#endif //!VTKM_NO_DEPRECATED_VIRTUAL
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vtkm::cont::CoordinateSystem GetCoordinates() const { return this->Coords; }
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void SetCoordinates(const vtkm::cont::CoordinateSystem& coords)
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{
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this->Coords = coords;
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this->SetModified();
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}
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void Update()
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{
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if (this->Modified)
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{
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static_cast<Derived*>(const_cast<PointLocatorBase*>(this))->Build();
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this->Modified = false;
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}
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}
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template <typename Device>
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VTKM_CONT VTKM_DEPRECATED(1.6, "PrepareForExecution now requires a vtkm::cont::Token object")
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const vtkm::cont::internal::ExecutionObjectType<Derived, Device> PrepareForExecution(
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Device device) const
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{
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vtkm::cont::Token token;
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return this->PrepareForExecution(device, token);
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}
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protected:
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void SetModified() { this->Modified = true; }
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bool GetModified() const { return this->Modified; }
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private:
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vtkm::cont::CoordinateSystem Coords;
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mutable bool Modified = true;
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};
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} // vtkm::cont::internal
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} // vtkm::cont
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} // vtkm
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#endif // vtk_m_cont_internal_PointLocatorBase_h
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