mirror of
https://gitlab.kitware.com/vtk/vtk-m
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90 lines
3.1 KiB
C++
90 lines
3.1 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_CellLocatorUniformBins_h
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#define vtk_m_cont_CellLocatorUniformBins_h
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/CellSetList.h>
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#include <vtkm/cont/ArrayHandleGroupVecVariable.h>
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#include <vtkm/cont/internal/CellLocatorBase.h>
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#include <vtkm/exec/CellLocatorMultiplexer.h>
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#include <vtkm/exec/CellLocatorUniformBins.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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/// \brief A locator that uses a uniform grid
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///
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/// `CellLocatorUniformBins` creates a cell search structure using a single uniform
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/// grid. The size of the uniform grid is specified using the `SetDims` method.
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/// In general, the `CellLocatorTwoLevel` has the better performance. However,
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/// there are some cases where this is not the case. One example of this is
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/// a uniformly dense triangle grid. In some cases the `CellLocatorUniformBins`
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/// produces a more efficient search structure, especially for GPUs where memory
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/// access patterns are critical to performance.
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class VTKM_CONT_EXPORT CellLocatorUniformBins
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: public vtkm::cont::internal::CellLocatorBase<CellLocatorUniformBins>
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{
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using Superclass = vtkm::cont::internal::CellLocatorBase<CellLocatorUniformBins>;
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template <typename CellSetCont>
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using CellSetContToExec =
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typename CellSetCont::template ExecConnectivityType<vtkm::TopologyElementTagCell,
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vtkm::TopologyElementTagPoint>;
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public:
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using SupportedCellSets = VTKM_DEFAULT_CELL_SET_LIST;
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using CellExecObjectList = vtkm::ListTransform<SupportedCellSets, CellSetContToExec>;
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using CellLocatorExecList =
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vtkm::ListTransform<CellExecObjectList, vtkm::exec::CellLocatorUniformBins>;
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using ExecObjType = vtkm::ListApply<CellLocatorExecList, vtkm::exec::CellLocatorMultiplexer>;
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using LastCell = typename ExecObjType::LastCell;
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CellLocatorUniformBins() {}
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void SetDims(const vtkm::Id3& dims) { this->UniformDims = dims; }
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vtkm::Id3 GetDims() const { return this->UniformDims; }
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void PrintSummary(std::ostream& out) const;
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public:
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ExecObjType PrepareForExecution(vtkm::cont::DeviceAdapterId device,
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vtkm::cont::Token& token) const;
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private:
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friend Superclass;
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VTKM_CONT void Build();
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vtkm::Vec3f InvSpacing;
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vtkm::Vec3f MaxPoint;
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vtkm::Vec3f Origin;
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vtkm::Id3 UniformDims;
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vtkm::Id3 MaxCellIds;
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using CellIdArrayType = vtkm::cont::ArrayHandle<vtkm::Id>;
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using CellIdOffsetArrayType = vtkm::cont::ArrayHandle<vtkm::Id>;
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vtkm::cont::ArrayHandleGroupVecVariable<CellIdArrayType, CellIdOffsetArrayType> CellIds;
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struct MakeExecObject;
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};
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}
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} // vtkm::cont
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#endif // vtk_m_cont_CellLocatorUniformBins_h
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