mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 01:49:02 +00:00
ArrayHandleRandomUniformReal
Add an ArrayHandle for generating random Float64 in the range of [0, 1).
This commit is contained in:
parent
da6fc5e378
commit
e9f584a91f
@ -7,8 +7,8 @@
|
||||
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||||
// PURPOSE. See the above copyright notice for more information.
|
||||
//============================================================================
|
||||
#ifndef vtk_m_cont_ArrayHandlePhiloxURBG_h
|
||||
#define vtk_m_cont_ArrayHandlePhiloxURBG_h
|
||||
#ifndef vtk_m_cont_ArrayHandleRandomUniformBits_h
|
||||
#define vtk_m_cont_ArrayHandleRandomUniformBits_h
|
||||
|
||||
#include <random>
|
||||
#include <vtkm/cont/ArrayHandleImplicit.h>
|
||||
@ -96,4 +96,4 @@ namespace cont
|
||||
}
|
||||
} // namespace vtkm::cont
|
||||
/// @endcond
|
||||
#endif //vtk_m_cont_ArrayHandlePhiloxURBG_h
|
||||
#endif //vtk_m_cont_ArrayHandleRandomUniformBits_h
|
||||
|
58
vtkm/cont/ArrayHandleRandomUniformReal.h
Normal file
58
vtkm/cont/ArrayHandleRandomUniformReal.h
Normal file
@ -0,0 +1,58 @@
|
||||
//============================================================================
|
||||
// Copyright (c) Kitware, Inc.
|
||||
// All rights reserved.
|
||||
// See LICENSE.txt for details.
|
||||
//
|
||||
// This software is distributed WITHOUT ANY WARRANTY; without even
|
||||
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||||
// PURPOSE. See the above copyright notice for more information.
|
||||
//============================================================================
|
||||
#ifndef vtk_m_count_ArrayHandleRandomUniformReal_h
|
||||
#define vtk_m_count_ArrayHandleRandomUniformReal_h
|
||||
|
||||
#include <vtkm/cont/ArrayHandleRandomUniformBits.h>
|
||||
#include <vtkm/cont/ArrayHandleTransform.h>
|
||||
|
||||
namespace vtkm
|
||||
{
|
||||
namespace cont
|
||||
{
|
||||
|
||||
namespace detail
|
||||
{
|
||||
struct CanonicalFunctor
|
||||
{
|
||||
/// \brief VTKm's equivalent of std::generate_canonical, turning a random bit source into
|
||||
/// random real number in the range of [0, 1).
|
||||
// We take 53 bits (number of bits in mantissa in a double) from the 64 bits random source
|
||||
// and divide it by (1 << 53).
|
||||
static constexpr vtkm::Float64 DIVISOR = static_cast<vtkm::Float64>(1UL << 53);
|
||||
static constexpr vtkm::UInt64 MASK = (1UL << 53) - 1UL;
|
||||
|
||||
VTKM_EXEC_CONT
|
||||
vtkm::Float64 operator()(vtkm::UInt64 bits) const { return (bits & MASK) / DIVISOR; }
|
||||
};
|
||||
} // detail
|
||||
|
||||
class VTKM_ALWAYS_EXPORT ArrayHandleRandomUniformReal
|
||||
: public vtkm::cont::ArrayHandleTransform<vtkm::cont::ArrayHandleRandomUniformBits,
|
||||
detail::CanonicalFunctor>
|
||||
{
|
||||
public:
|
||||
using SeedType = vtkm::Vec<vtkm::UInt32, 1>;
|
||||
|
||||
VTKM_ARRAY_HANDLE_SUBCLASS_NT(
|
||||
ArrayHandleRandomUniformReal,
|
||||
(vtkm::cont::ArrayHandleTransform<vtkm::cont::ArrayHandleRandomUniformBits,
|
||||
detail::CanonicalFunctor>));
|
||||
|
||||
explicit ArrayHandleRandomUniformReal(vtkm::Id length, SeedType seed = { std::random_device{}() })
|
||||
: Superclass(vtkm::cont::ArrayHandleRandomUniformBits{ length, seed },
|
||||
detail::CanonicalFunctor{})
|
||||
{
|
||||
}
|
||||
};
|
||||
|
||||
} // cont
|
||||
} // vtkm
|
||||
#endif //vtk_m_count_ArrayHandleRandomUniformReal_h
|
@ -33,6 +33,7 @@ set(headers
|
||||
ArrayHandlePermutation.h
|
||||
ArrayHandleReverse.h
|
||||
ArrayHandleRandomUniformBits.h
|
||||
ArrayHandleRandomUniformReal.h
|
||||
ArrayHandleSOA.h
|
||||
ArrayHandleSwizzle.h
|
||||
ArrayHandleTransform.h
|
||||
|
@ -48,6 +48,7 @@ set(unit_tests
|
||||
UnitTestArrayHandleReverse.cxx
|
||||
UnitTestArrayHandlePermutation.cxx
|
||||
UnitTestArrayHandleRandomUniformBits.cxx
|
||||
UnitTestArrayHandleRandomUniformReal.cxx
|
||||
UnitTestArrayHandleSwizzle.cxx
|
||||
UnitTestArrayHandleThreadSafety.cxx
|
||||
UnitTestArrayHandleTransform.cxx
|
||||
|
28
vtkm/cont/testing/UnitTestArrayHandleRandomUniformReal.cxx
Normal file
28
vtkm/cont/testing/UnitTestArrayHandleRandomUniformReal.cxx
Normal file
@ -0,0 +1,28 @@
|
||||
//============================================================================
|
||||
// Copyright (c) Kitware, Inc.
|
||||
// All rights reserved.
|
||||
// See LICENSE.txt for details.
|
||||
//
|
||||
// This software is distributed WITHOUT ANY WARRANTY; without even
|
||||
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||||
// PURPOSE. See the above copyright notice for more information.
|
||||
//============================================================================
|
||||
|
||||
#include <vtkm/cont/ArrayHandleRandomUniformReal.h>
|
||||
#include <vtkm/cont/testing/Testing.h>
|
||||
|
||||
void TestArrayHandleUniformReal()
|
||||
{
|
||||
auto array = vtkm::cont::ArrayHandleRandomUniformReal(10);
|
||||
for (vtkm::Id i = 0; i < array.GetNumberOfValues(); ++i)
|
||||
{
|
||||
auto value = array.ReadPortal().Get(i);
|
||||
VTKM_TEST_ASSERT(0.0 <= value && value < 1.0);
|
||||
}
|
||||
}
|
||||
|
||||
int UnitTestArrayHandleRandomUniformReal(int argc, char* argv[])
|
||||
{
|
||||
|
||||
return vtkm::cont::testing::Testing::Run(TestArrayHandleUniformReal, argc, argv);
|
||||
}
|
@ -18,7 +18,7 @@ namespace random
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
VTKM_EXEC_CONT vtkm::Vec<vtkm::UInt32, 2> mulhilo(vtkm::UInt32 a, vtkm::UInt32 b)
|
||||
static inline VTKM_EXEC_CONT vtkm::Vec<vtkm::UInt32, 2> mulhilo(vtkm::UInt32 a, vtkm::UInt32 b)
|
||||
{
|
||||
vtkm::UInt64 r = static_cast<vtkm::UInt64>(a) * b;
|
||||
auto lo = static_cast<vtkm::UInt32>(r);
|
||||
|
Loading…
Reference in New Issue
Block a user