131 lines
4.9 KiB
C++
131 lines
4.9 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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// 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 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 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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#include <vtkm/worklet/CrossProduct.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <random>
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#include <vtkm/cont/testing/Testing.h>
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namespace
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{
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std::mt19937 randGenerator;
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template <typename T>
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void createVectors(std::vector<vtkm::Vec<T, 3>>& vecs1, std::vector<vtkm::Vec<T, 3>>& vecs2)
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{
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// First, test the standard directions.
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// X x Y
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vecs1.push_back(vtkm::make_Vec(1, 0, 0));
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vecs2.push_back(vtkm::make_Vec(0, 1, 0));
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// Y x Z
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vecs1.push_back(vtkm::make_Vec(0, 1, 0));
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vecs2.push_back(vtkm::make_Vec(0, 0, 1));
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// Z x X
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vecs1.push_back(vtkm::make_Vec(0, 0, 1));
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vecs2.push_back(vtkm::make_Vec(1, 0, 0));
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// Y x X
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vecs1.push_back(vtkm::make_Vec(0, 1, 0));
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vecs2.push_back(vtkm::make_Vec(1, 0, 0));
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// Z x Y
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vecs1.push_back(vtkm::make_Vec(0, 0, 1));
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vecs2.push_back(vtkm::make_Vec(0, 1, 0));
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// X x Z
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vecs1.push_back(vtkm::make_Vec(1, 0, 0));
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vecs2.push_back(vtkm::make_Vec(0, 0, 1));
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//Test some other vector combinations
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std::uniform_real_distribution<vtkm::Float64> randomDist(-10.0, 10.0);
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randomDist(randGenerator);
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for (int i = 0; i < 100; i++)
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{
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vecs1.push_back(vtkm::make_Vec(
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randomDist(randGenerator), randomDist(randGenerator), randomDist(randGenerator)));
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vecs2.push_back(vtkm::make_Vec(
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randomDist(randGenerator), randomDist(randGenerator), randomDist(randGenerator)));
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}
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}
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template <typename T>
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void TestCrossProduct()
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{
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std::vector<vtkm::Vec<T, 3>> inputVecs1, inputVecs2;
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createVectors(inputVecs1, inputVecs2);
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>> inputArray1, inputArray2;
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>> outputArray;
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inputArray1 = vtkm::cont::make_ArrayHandle(inputVecs1);
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inputArray2 = vtkm::cont::make_ArrayHandle(inputVecs2);
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vtkm::worklet::CrossProduct crossProductWorklet;
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vtkm::worklet::DispatcherMapField<vtkm::worklet::CrossProduct> dispatcherCrossProduct(
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crossProductWorklet);
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dispatcherCrossProduct.Invoke(inputArray1, inputArray2, outputArray);
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VTKM_TEST_ASSERT(outputArray.GetNumberOfValues() == inputArray1.GetNumberOfValues(),
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"Wrong number of results for CrossProduct worklet");
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//Test the canonical cases.
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VTKM_TEST_ASSERT(
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test_equal(outputArray.GetPortalConstControl().Get(0), vtkm::make_Vec(0, 0, 1)) &&
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test_equal(outputArray.GetPortalConstControl().Get(1), vtkm::make_Vec(1, 0, 0)) &&
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test_equal(outputArray.GetPortalConstControl().Get(2), vtkm::make_Vec(0, 1, 0)) &&
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test_equal(outputArray.GetPortalConstControl().Get(3), vtkm::make_Vec(0, 0, -1)) &&
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test_equal(outputArray.GetPortalConstControl().Get(4), vtkm::make_Vec(-1, 0, 0)) &&
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test_equal(outputArray.GetPortalConstControl().Get(5), vtkm::make_Vec(0, -1, 0)),
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"Wrong result for CrossProduct worklet");
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for (vtkm::Id i = 0; i < inputArray1.GetNumberOfValues(); i++)
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{
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vtkm::Vec<T, 3> v1 = inputArray1.GetPortalConstControl().Get(i);
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vtkm::Vec<T, 3> v2 = inputArray2.GetPortalConstControl().Get(i);
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vtkm::Vec<T, 3> res = outputArray.GetPortalConstControl().Get(i);
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//Make sure result is orthogonal each input vector. Need to normalize to compare with zero.
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vtkm::Vec<T, 3> v1N(vtkm::Normal(v1)), v2N(vtkm::Normal(v1)), resN(vtkm::Normal(res));
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VTKM_TEST_ASSERT(test_equal(vtkm::dot(resN, v1N), T(0.0)), "Wrong result for cross product");
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VTKM_TEST_ASSERT(test_equal(vtkm::dot(resN, v2N), T(0.0)), "Wrong result for cross product");
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T sinAngle = vtkm::Magnitude(res) * vtkm::RMagnitude(v1) * vtkm::RMagnitude(v2);
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T cosAngle = vtkm::dot(v1, v2) * vtkm::RMagnitude(v1) * vtkm::RMagnitude(v2);
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VTKM_TEST_ASSERT(test_equal(sinAngle * sinAngle + cosAngle * cosAngle, T(1.0)),
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"Bad cross product length.");
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}
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}
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void TestCrossProductWorklets()
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{
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std::cout << "Testing CrossProduct Worklet" << std::endl;
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TestCrossProduct<vtkm::Float32>();
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TestCrossProduct<vtkm::Float64>();
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}
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}
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int UnitTestCrossProduct(int, char* [])
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{
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return vtkm::cont::testing::Testing::Run(TestCrossProductWorklets);
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}
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