ed3a64a512
Capitalize the first character of data members. Rename Run() to FindNearestPoint().
149 lines
5.3 KiB
C++
149 lines
5.3 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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// 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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// Copyright 2017 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2017 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_testing_TestingPointLocatorUniformGrid_h
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#define vtk_m_cont_testing_TestingPointLocatorUniformGrid_h
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#include <random>
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#include <vtkm/cont/testing/Testing.h>
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#include <vtkm/cont/PointLocatorUniformGrid.h>
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////brute force method /////
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template <typename CoordiVecT, typename CoordiPortalT, typename CoordiT>
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VTKM_EXEC_CONT vtkm::Id NNSVerify3D(CoordiVecT qc, CoordiPortalT coordiPortal, CoordiT& dis)
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{
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dis = std::numeric_limits<CoordiT>::max();
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vtkm::Id nnpIdx = -1;
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for (vtkm::Int32 i = 0; i < coordiPortal.GetNumberOfValues(); i++)
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{
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CoordiT splitX = coordiPortal.Get(i)[0];
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CoordiT splitY = coordiPortal.Get(i)[1];
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CoordiT splitZ = coordiPortal.Get(i)[2];
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CoordiT _dis =
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vtkm::Sqrt((splitX - qc[0]) * (splitX - qc[0]) + (splitY - qc[1]) * (splitY - qc[1]) +
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(splitZ - qc[2]) * (splitZ - qc[2]));
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if (_dis < dis)
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{
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dis = _dis;
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nnpIdx = i;
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}
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}
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return nnpIdx;
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}
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class NearestNeighborSearchBruteForce3DWorklet : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<> qcIn,
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WholeArrayIn<> treeCoordiIn,
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FieldOut<> nnIdOut,
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FieldOut<> nnDisOut);
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typedef void ExecutionSignature(_1, _2, _3, _4);
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VTKM_CONT
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NearestNeighborSearchBruteForce3DWorklet() {}
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template <typename CoordiVecType, typename CoordiPortalType, typename IdType, typename CoordiType>
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VTKM_EXEC void operator()(const CoordiVecType& qc,
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const CoordiPortalType& coordiPortal,
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IdType& nnId,
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CoordiType& nnDis) const
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{
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nnDis = std::numeric_limits<CoordiType>::max();
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nnId = NNSVerify3D(qc, coordiPortal, nnDis);
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}
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};
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template <typename DeviceAdapter>
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class TestingPointLocatorUniformGrid
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{
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public:
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typedef vtkm::cont::DeviceAdapterAlgorithm<VTKM_DEFAULT_DEVICE_ADAPTER_TAG> Algorithm;
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void TestTest() const
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{
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vtkm::Int32 nTrainingPoints = 1000;
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vtkm::Int32 nTestingPoint = 1000;
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std::vector<vtkm::Vec<vtkm::Float32, 3>> coordi;
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///// randomly generate training points/////
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std::default_random_engine dre;
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std::uniform_real_distribution<vtkm::Float32> dr(0.0f, 10.0f);
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for (vtkm::Int32 i = 0; i < nTrainingPoints; i++)
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{
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coordi.push_back(vtkm::make_Vec(dr(dre), dr(dre), dr(dre)));
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}
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auto coordi_Handle = vtkm::cont::make_ArrayHandle(coordi);
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vtkm::worklet::PointLocatorUniformGrid<vtkm::Float32> uniformGrid(
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{ 0.0f, 0.0f, 0.0f }, { 10.0f, 10.0f, 10.0f }, { 5, 5, 5 });
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uniformGrid.Build(coordi_Handle, VTKM_DEFAULT_DEVICE_ADAPTER_TAG());
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std::vector<vtkm::Vec<vtkm::Float32, 3>> qcVec;
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for (vtkm::Int32 i = 0; i < nTestingPoint; i++)
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{
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qcVec.push_back(vtkm::make_Vec(dr(dre), dr(dre), dr(dre)));
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}
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auto qc_Handle = vtkm::cont::make_ArrayHandle(qcVec);
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vtkm::cont::ArrayHandle<vtkm::Id> nnId_Handle;
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vtkm::cont::ArrayHandle<vtkm::Float32> nnDis_Handle;
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uniformGrid.FindNearestPoint(
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coordi_Handle, qc_Handle, nnId_Handle, nnDis_Handle, VTKM_DEFAULT_DEVICE_ADAPTER_TAG());
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vtkm::cont::ArrayHandle<vtkm::Id> bfnnId_Handle;
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vtkm::cont::ArrayHandle<vtkm::Float32> bfnnDis_Handle;
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NearestNeighborSearchBruteForce3DWorklet nnsbf3dWorklet;
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vtkm::worklet::DispatcherMapField<NearestNeighborSearchBruteForce3DWorklet> nnsbf3DDispatcher(
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nnsbf3dWorklet);
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nnsbf3DDispatcher.Invoke(
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qc_Handle, vtkm::cont::make_ArrayHandle(coordi), bfnnId_Handle, bfnnDis_Handle);
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///// verfity search result /////
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bool passTest = true;
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for (vtkm::Int32 i = 0; i < nTestingPoint; i++)
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{
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vtkm::Id workletIdx = nnId_Handle.GetPortalControl().Get(i);
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vtkm::Float32 workletDis = nnDis_Handle.GetPortalConstControl().Get(i);
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vtkm::Id bfworkletIdx = bfnnId_Handle.GetPortalControl().Get(i);
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vtkm::Float32 bfworkletDis = bfnnDis_Handle.GetPortalConstControl().Get(i);
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if (workletIdx != bfworkletIdx)
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{
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std::cout << "bf index: " << bfworkletIdx << ", dis: " << bfworkletDis
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<< ", grid: " << workletIdx << ", dis " << workletDis << std::endl;
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passTest = false;
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}
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}
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VTKM_TEST_ASSERT(passTest, "Uniform Grid NN search result incorrect.");
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}
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void operator()() const { this->TestTest(); }
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};
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#endif // vtk_m_cont_testing_TestingPointLocatorUniformGrid_h
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