mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 09:59:12 +00:00
111 lines
3.8 KiB
C++
111 lines
3.8 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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#include <vtkm/cont/ArrayHandleCompositeVector.h>
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#include <vtkm/cont/ArrayHandleRandomStandardNormal.h>
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#include <vtkm/cont/ArrayHandleRandomUniformBits.h>
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#include <vtkm/cont/ArrayHandleRandomUniformReal.h>
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#include <vtkm/cont/testing/Testing.h>
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namespace
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{
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void Test()
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{
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////
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//// BEGIN-EXAMPLE ArrayHandleRandomUniformBits
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////
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// Create an array containing a sequence of random bits seeded
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// by std::random_device.
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vtkm::cont::ArrayHandleRandomUniformBits randomArray(50);
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// Create an array containing a sequence of random bits with
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// a user supplied seed.
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vtkm::cont::ArrayHandleRandomUniformBits randomArraySeeded(50, { 123 });
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////
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//// END-EXAMPLE ArrayHandleRandomUniformBits
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////
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////
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//// BEGIN-EXAMPLE ArrayHandleRandomUniformBitsFunctional
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////
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// ArrayHandleRandomUniformBits is functional, it returns
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// the same value for the same entry is accessed.
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auto r0 = randomArray.ReadPortal().Get(5);
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auto r1 = randomArray.ReadPortal().Get(5);
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assert(r0 == r1);
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////
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//// END-EXAMPLE ArrayHandleRandomUniformBitsFunctional
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////
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// In case assert is an empty expression.
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VTKM_TEST_ASSERT(r0 == r1);
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////
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//// BEGIN-EXAMPLE ArrayHandleRandomUniformBitsIteration
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////
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// Create a new insance of ArrayHandleRandomUniformBits
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// for each set of random bits.
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vtkm::cont::ArrayHandleRandomUniformBits randomArray0(50, { 0 });
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vtkm::cont::ArrayHandleRandomUniformBits randomArray1(50, { 1 });
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assert(randomArray0.ReadPortal().Get(5) != randomArray1.ReadPortal().Get(5));
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////
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//// END-EXAMPLE ArrayHandleRandomUniformBitsIteration
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////
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// In case assert is an empty expression.
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VTKM_TEST_ASSERT(randomArray0.ReadPortal().Get(5) != randomArray1.ReadPortal().Get(5));
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{
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////
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//// BEGIN-EXAMPLE ArrayHandleRandomUniformReal
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////
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constexpr vtkm::Id NumPoints = 50;
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auto randomPointsInBox = vtkm::cont::make_ArrayHandleCompositeVector(
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vtkm::cont::ArrayHandleRandomUniformReal<vtkm::FloatDefault>(NumPoints),
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vtkm::cont::ArrayHandleRandomUniformReal<vtkm::FloatDefault>(NumPoints),
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vtkm::cont::ArrayHandleRandomUniformReal<vtkm::FloatDefault>(NumPoints));
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////
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//// END-EXAMPLE ArrayHandleRandomUniformReal
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////
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VTKM_TEST_ASSERT(randomPointsInBox.GetNumberOfValues() == NumPoints);
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auto portal = randomPointsInBox.ReadPortal();
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for (vtkm::Id idx = 0; idx < NumPoints; ++idx)
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{
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vtkm::Vec3f value = portal.Get(idx);
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VTKM_TEST_ASSERT((value[0] >= 0) && (value[0] <= 1));
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VTKM_TEST_ASSERT((value[1] >= 0) && (value[1] <= 1));
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VTKM_TEST_ASSERT((value[2] >= 0) && (value[2] <= 1));
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}
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}
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{
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////
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//// BEGIN-EXAMPLE ArrayHandleRandomStandardNormal
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////
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constexpr vtkm::Id NumPoints = 50;
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auto randomPointsInGaussian = vtkm::cont::make_ArrayHandleCompositeVector(
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vtkm::cont::ArrayHandleRandomStandardNormal<vtkm::FloatDefault>(NumPoints),
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vtkm::cont::ArrayHandleRandomStandardNormal<vtkm::FloatDefault>(NumPoints),
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vtkm::cont::ArrayHandleRandomStandardNormal<vtkm::FloatDefault>(NumPoints));
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////
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//// END-EXAMPLE ArrayHandleRandomStandardNormal
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////
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VTKM_TEST_ASSERT(randomPointsInGaussian.GetNumberOfValues() == NumPoints);
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}
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}
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} // anonymous namespace
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int GuideExampleArrayHandleRandom(int argc, char* argv[])
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{
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return vtkm::cont::testing::Testing::Run(Test, argc, argv);
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}
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