mirror of
https://gitlab.kitware.com/vtk/vtk-m
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77 lines
2.9 KiB
C++
77 lines
2.9 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 vtkm_m_worklet_KdTree3D_h
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#define vtkm_m_worklet_KdTree3D_h
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#include <vtkm/worklet/spatialstructure/KdTree3DConstruction.h>
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#include <vtkm/worklet/spatialstructure/KdTree3DNNSearch.h>
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namespace vtkm
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{
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namespace worklet
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{
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class KdTree3D
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{
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public:
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KdTree3D() = default;
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/// \brief Construct a 3D KD-tree for 3D point positions.
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///
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/// \tparam CoordType type of the x, y, z component of the point coordinates.
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/// \tparam CoordStorageTag
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/// \param coords An ArrayHandle of x, y, z coordinates of input points.
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///
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template <typename CoordType, typename CoordStorageTag>
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void Build(const vtkm::cont::ArrayHandle<vtkm::Vec<CoordType, 3>, CoordStorageTag>& coords)
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{
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vtkm::worklet::spatialstructure::KdTree3DConstruction().Run(
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coords, this->PointIds, this->SplitIds);
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}
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/// \brief Nearest neighbor search using KD-Tree
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///
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/// Parallel search of nearest neighbor for each point in the \c queryPoints in the the set of
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/// \c coords. Returns nearest neighbor in \c nearestNeighborId and distance to nearest neighbor
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/// in \c distances.
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///
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/// \tparam CoordType
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/// \tparam CoordStorageTag1
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/// \tparam CoordStorageTag2
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/// \tparam DeviceAdapter
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/// \param coords Point coordinates for training data set (haystack)
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/// \param queryPoints Point coordinates to query for nearest neighbor (needles).
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/// \param nearestNeighborIds Nearest neighbor in the traning data set for each points in the
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/// testing set
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/// \param distances Distances between query points and their nearest neighbors.
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/// \param deviceId Tag for selecting device adapter.
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template <typename CoordType,
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typename CoordStorageTag1,
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typename CoordStorageTag2,
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typename DeviceAdapter>
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void Run(const vtkm::cont::ArrayHandle<vtkm::Vec<CoordType, 3>, CoordStorageTag1>& coords,
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const vtkm::cont::ArrayHandle<vtkm::Vec<CoordType, 3>, CoordStorageTag2>& queryPoints,
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vtkm::cont::ArrayHandle<vtkm::Id>& nearestNeighborIds,
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vtkm::cont::ArrayHandle<CoordType>& distances,
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DeviceAdapter deviceId)
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{
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vtkm::worklet::spatialstructure::KdTree3DNNSearch().Run(
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coords, this->PointIds, this->SplitIds, queryPoints, nearestNeighborIds, distances, deviceId);
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}
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private:
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vtkm::cont::ArrayHandle<vtkm::Id> PointIds;
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vtkm::cont::ArrayHandle<vtkm::Id> SplitIds;
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};
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}
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} // namespace vtkm::worklet
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#endif // vtkm_m_worklet_Kdtree3D_h
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