Implement uniform_inside_sphere_distribution extension.
2016-10-26 Edward Smith-Rowland <3dw4rd@verizon.net> Implement uniform_inside_sphere_distribution extension. * include/ext/random: Implement uniform_inside_sphere_distribution. * include/ext/random.tcc: Ditto. * testsuite/ext/random/uniform_inside_sphere_distribution/ cons/default.cc: New. * testsuite/ext/random/uniform_inside_sphere_distribution/ cons/parms.cc: New. * testsuite/ext/random/uniform_inside_sphere_distribution/ operators/equal.cc: New. * testsuite/ext/random/uniform_inside_sphere_distribution/ operators/generate.cc: New. * testsuite/ext/random/uniform_inside_sphere_distribution/ operators/inequal.cc: New. * testsuite/ext/random/uniform_inside_sphere_distribution/ operators/serialize.cc: New. From-SVN: r241562
This commit is contained in:
Edward Smith-Rowland
Edward Smith-Rowland
parent
b2029ad650
commit
10da5b7cbc
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@ -1,3 +1,21 @@
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2016-10-26 Edward Smith-Rowland <3dw4rd@verizon.net>
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Implement uniform_inside_sphere_distribution extension.
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* include/ext/random: Implement uniform_inside_sphere_distribution.
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* include/ext/random.tcc: Ditto.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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cons/default.cc: New.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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cons/parms.cc: New.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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operators/equal.cc: New.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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operators/generate.cc: New.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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operators/inequal.cc: New.
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* testsuite/ext/random/uniform_inside_sphere_distribution/
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operators/serialize.cc: New.
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2016-10-26 Jonathan Wakely <jwakely@redhat.com>
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* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
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@ -3493,6 +3493,218 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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_RealType>& __d2)
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{ return !(__d1 == __d2); }
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/**
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* @brief A distribution for random coordinates inside a unit sphere.
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*/
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template<std::size_t _Dimen, typename _RealType = double>
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class uniform_inside_sphere_distribution
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{
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static_assert(std::is_floating_point<_RealType>::value,
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"template argument not a floating point type");
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static_assert(_Dimen != 0, "dimension is zero");
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public:
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/** The type of the range of the distribution. */
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using result_type = std::array<_RealType, _Dimen>;
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/** Parameter type. */
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struct param_type
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{
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using distribution_type
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= uniform_inside_sphere_distribution<_Dimen, _RealType>;
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friend class uniform_inside_sphere_distribution<_Dimen, _RealType>;
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explicit
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param_type(_RealType __radius = _RealType(1))
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: _M_radius(__radius)
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{
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__glibcxx_assert(_M_radius > _RealType(0));
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}
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_RealType
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radius() const
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{ return _M_radius; }
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friend bool
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operator==(const param_type& __p1, const param_type& __p2)
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{ return __p1._M_radius == __p2._M_radius; }
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private:
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_RealType _M_radius;
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};
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/**
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* @brief Constructors.
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*/
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explicit
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uniform_inside_sphere_distribution(_RealType __radius = _RealType(1))
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: _M_param(__radius), _M_uosd()
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{ }
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explicit
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uniform_inside_sphere_distribution(const param_type& __p)
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: _M_param(__p), _M_uosd()
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{ }
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/**
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* @brief Resets the distribution state.
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*/
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void
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reset()
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{ _M_uosd.reset(); }
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/**
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* @brief Returns the @f$radius@f$ of the distribution.
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*/
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_RealType
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radius() const
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{ return _M_param.radius(); }
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/**
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* @brief Returns the parameter set of the distribution.
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*/
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param_type
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param() const
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{ return _M_param; }
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/**
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* @brief Sets the parameter set of the distribution.
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* @param __param The new parameter set of the distribution.
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*/
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void
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param(const param_type& __param)
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{ _M_param = __param; }
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/**
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* @brief Returns the greatest lower bound value of the distribution.
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* This function makes no sense for this distribution.
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*/
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result_type
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min() const
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{
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result_type __res;
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__res.fill(0);
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return __res;
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}
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/**
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* @brief Returns the least upper bound value of the distribution.
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* This function makes no sense for this distribution.
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*/
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result_type
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max() const
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{
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result_type __res;
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__res.fill(0);
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return __res;
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}
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/**
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* @brief Generating functions.
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*/
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template<typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformRandomNumberGenerator& __urng)
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{ return this->operator()(__urng, _M_param); }
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template<typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformRandomNumberGenerator& __urng,
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const param_type& __p);
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng)
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{ this->__generate(__f, __t, __urng, this->param()); }
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p)
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{ this->__generate_impl(__f, __t, __urng, __p); }
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template<typename _UniformRandomNumberGenerator>
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void
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__generate(result_type* __f, result_type* __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p)
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{ this->__generate_impl(__f, __t, __urng, __p); }
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/**
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* @brief Return true if two uniform on sphere distributions have
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* the same parameters and the sequences that would be
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* generated are equal.
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*/
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friend bool
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operator==(const uniform_inside_sphere_distribution& __d1,
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const uniform_inside_sphere_distribution& __d2)
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{ return __d1._M_param == __d2._M_param && __d1._M_uosd == __d2._M_uosd; }
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/**
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* @brief Inserts a %uniform_inside_sphere_distribution random number
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* distribution @p __x into the output stream @p __os.
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*
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* @param __os An output stream.
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* @param __x A %uniform_inside_sphere_distribution random number
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* distribution.
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*
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* @returns The output stream with the state of @p __x inserted or in
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* an error state.
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*/
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template<size_t _Dimen1, typename _RealType1, typename _CharT,
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typename _Traits>
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friend std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const __gnu_cxx::uniform_inside_sphere_distribution<_Dimen1,
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_RealType1>&
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);
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/**
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* @brief Extracts a %uniform_inside_sphere_distribution random number
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* distribution
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* @p __x from the input stream @p __is.
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*
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* @param __is An input stream.
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* @param __x A %uniform_inside_sphere_distribution random number
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* generator engine.
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*
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* @returns The input stream with @p __x extracted or in an error state.
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*/
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template<std::size_t _Dimen1, typename _RealType1, typename _CharT,
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typename _Traits>
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friend std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>& __is,
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__gnu_cxx::uniform_inside_sphere_distribution<_Dimen1,
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_RealType1>&);
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private:
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate_impl(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p);
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param_type _M_param;
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uniform_on_sphere_distribution<_Dimen, _RealType> _M_uosd;
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};
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/**
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* @brief Return true if two uniform on sphere distributions are different.
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*/
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template<std::size_t _Dimen, typename _RealType>
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inline bool
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operator!=(const __gnu_cxx::uniform_inside_sphere_distribution<_Dimen,
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_RealType>& __d1,
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const __gnu_cxx::uniform_inside_sphere_distribution<_Dimen,
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_RealType>& __d2)
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{ return !(__d1 == __d2); }
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace __gnu_cxx
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@ -1669,8 +1669,168 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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return __is >> __x._M_nd;
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}
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namespace {
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// Helper class for the uniform_inside_sphere_distribution generation
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// function.
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template<std::size_t _Dimen, bool _SmallDimen, typename _RealType>
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class uniform_inside_sphere_helper;
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template<std::size_t _Dimen, typename _RealType>
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class uniform_inside_sphere_helper<_Dimen, false, _RealType>
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{
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using result_type
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= typename uniform_inside_sphere_distribution<_Dimen, _RealType>::
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result_type;
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public:
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template<typename _UniformOnSphereDistribution,
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typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformOnSphereDistribution& __uosd,
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_UniformRandomNumberGenerator& __urng,
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_RealType __radius)
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{
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std::__detail::_Adaptor<_UniformRandomNumberGenerator,
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_RealType> __aurng(__urng);
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_RealType __pow = 1 / _RealType(_Dimen);
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_RealType __urt = __radius * std::pow(__aurng(), __pow);
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result_type __ret = __uosd(__aurng);
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std::transform(__ret.begin(), __ret.end(), __ret.begin(),
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[__urt](_RealType __val)
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{ return __val * __urt; });
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return __ret;
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}
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};
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// Helper class for the uniform_inside_sphere_distribution generation
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// function specialized for small dimensions.
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template<std::size_t _Dimen, typename _RealType>
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class uniform_inside_sphere_helper<_Dimen, true, _RealType>
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{
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using result_type
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= typename uniform_inside_sphere_distribution<_Dimen, _RealType>::
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result_type;
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public:
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template<typename _UniformOnSphereDistribution,
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typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformOnSphereDistribution&,
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_UniformRandomNumberGenerator& __urng,
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_RealType __radius)
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{
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result_type __ret;
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_RealType __sq;
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_RealType __radsq = __radius * __radius;
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std::__detail::_Adaptor<_UniformRandomNumberGenerator,
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_RealType> __aurng(__urng);
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do
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{
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__sq = _RealType(0);
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for (int i = 0; i < _Dimen; ++i)
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{
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__ret[i] = _RealType(2) * __aurng() - _RealType(1);
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__sq += __ret[i] * __ret[i];
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}
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}
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while (__sq > _RealType(1));
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for (int i = 0; i < _Dimen; ++i)
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__ret[i] *= __radius;
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return __ret;
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}
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};
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} // namespace
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//
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// Experiments have shown that rejection is more efficient than transform
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// for dimensions less than 8.
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//
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template<std::size_t _Dimen, typename _RealType>
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template<typename _UniformRandomNumberGenerator>
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typename uniform_inside_sphere_distribution<_Dimen, _RealType>::result_type
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uniform_inside_sphere_distribution<_Dimen, _RealType>::
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operator()(_UniformRandomNumberGenerator& __urng,
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const param_type& __p)
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{
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uniform_inside_sphere_helper<_Dimen, _Dimen < 8, _RealType> __helper;
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return __helper(_M_uosd, __urng, __p.radius());
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}
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template<std::size_t _Dimen, typename _RealType>
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template<typename _OutputIterator,
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typename _UniformRandomNumberGenerator>
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void
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uniform_inside_sphere_distribution<_Dimen, _RealType>::
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__generate_impl(_OutputIterator __f, _OutputIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __param)
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{
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__glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator>)
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while (__f != __t)
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*__f++ = this->operator()(__urng, __param);
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}
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template<std::size_t _Dimen, typename _RealType, typename _CharT,
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typename _Traits>
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std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const __gnu_cxx::uniform_inside_sphere_distribution<_Dimen,
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_RealType>& __x)
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{
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typedef std::basic_ostream<_CharT, _Traits> __ostream_type;
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typedef typename __ostream_type::ios_base __ios_base;
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const typename __ios_base::fmtflags __flags = __os.flags();
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const _CharT __fill = __os.fill();
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const std::streamsize __precision = __os.precision();
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const _CharT __space = __os.widen(' ');
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__os.flags(__ios_base::scientific | __ios_base::left);
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__os.fill(__space);
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__os.precision(std::numeric_limits<_RealType>::max_digits10);
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__os << __x.radius() << __space << __x._M_uosd;
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__os.flags(__flags);
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__os.fill(__fill);
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__os.precision(__precision);
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return __os;
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}
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template<std::size_t _Dimen, typename _RealType, typename _CharT,
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typename _Traits>
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std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>& __is,
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__gnu_cxx::uniform_inside_sphere_distribution<_Dimen,
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_RealType>& __x)
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{
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typedef std::basic_istream<_CharT, _Traits> __istream_type;
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typedef typename __istream_type::ios_base __ios_base;
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const typename __ios_base::fmtflags __flags = __is.flags();
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__is.flags(__ios_base::dec | __ios_base::skipws);
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_RealType __radius_val;
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__is >> __radius_val >> __x._M_uosd;
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__x.param(typename uniform_inside_sphere_distribution<_Dimen, _RealType>::
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param_type(__radius_val));
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__is.flags(__flags);
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return __is;
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}
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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} // namespace __gnu_cxx
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#endif // _EXT_RANDOM_TCC
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@ -0,0 +1,43 @@
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// { dg-do run { target cxx11 } }
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// { dg-require-cstdint "" }
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//
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// Copyright (C) 2014-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
|
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// terms of the GNU General Public License as published by the
|
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
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||||
//
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// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// Class template uniform_on_sphere
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// 26.5.1.6 Random number distribution requirements [rand.req.dist]
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#include <ext/random>
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#include <testsuite_hooks.h>
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void
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test01()
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{
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bool test [[gnu::unused]] = true;
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__gnu_cxx::uniform_inside_sphere_distribution<2> u2;
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__gnu_cxx::uniform_inside_sphere_distribution<3> u3;
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__gnu_cxx::uniform_inside_sphere_distribution<4, double> u4;
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__gnu_cxx::uniform_inside_sphere_distribution<5, float> u5;
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}
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int
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main()
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{
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test01();
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return 0;
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}
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@ -0,0 +1,44 @@
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// { dg-do run { target cxx11 } }
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// { dg-require-cstdint "" }
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//
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// Copyright (C) 2014-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
|
||||
//
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||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Class template logistic_distribution
|
||||
// 26.5.1.6 Random number distribution requirements [rand.req.dist]
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test [[gnu::unused]] = true;
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<2> u(1.5);
|
||||
VERIFY( u.radius() == 1.5 );
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<3> v(3.0);
|
||||
VERIFY( v.radius() == 3.0 );
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
// { dg-do run { target cxx11 } }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// Copyright (C) 2014-2016 Free Software Foundation, Inc.
|
||||
//
|
||||
// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Class template uniform_inside_sphere_distribution
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test [[gnu::unused]] = true;
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<3> u(2.0), v(2.0);
|
||||
|
||||
VERIFY( u == v );
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
// { dg-do run { target cxx11 } }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// Copyright (C) 2014-2016 Free Software Foundation, Inc.
|
||||
//
|
||||
// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Class template uniform_inside_sphere_distribution
|
||||
// 26.5.1.6 Random number distribution requirements [rand.req.dist]
|
||||
|
||||
#include <ext/random>
|
||||
#include <sstream>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test [[gnu::unused]] = true;
|
||||
std::minstd_rand0 rng;
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<3> u3(2.0);
|
||||
|
||||
for (size_t n = 0; n < 1000; ++n)
|
||||
{
|
||||
auto r = u3(rng);
|
||||
|
||||
VERIFY (std::abs(r[0]) < 2.0
|
||||
&& std::abs(r[1]) < 2.0
|
||||
&& std::abs(r[2]) < 2.0);
|
||||
}
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<2> u2(4000.0);
|
||||
|
||||
for (size_t n = 0; n < 1000; ++n)
|
||||
{
|
||||
auto r = u2(rng);
|
||||
|
||||
VERIFY (std::abs(r[0]) < 4000.0 && std::abs(r[1]) < 4000.0);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
// { dg-do run { target cxx11 } }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// Copyright (C) 2014-2016 Free Software Foundation, Inc.
|
||||
//
|
||||
// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Class template uniform_inside_sphere_distribution
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test [[gnu::unused]] = true;
|
||||
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<3> u(4.0), v(4.0);
|
||||
|
||||
VERIFY( !(u != v) );
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
// { dg-do run { target cxx11 } }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// Copyright (C) 2014-2016 Free Software Foundation, Inc.
|
||||
//
|
||||
// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 3, or (at your option)
|
||||
// any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING3. If not see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
// Class template uniform_inside_sphere_distribution
|
||||
// 26.5.1.6 Random number distribution requirements [rand.req.dist]
|
||||
|
||||
#include <ext/random>
|
||||
#include <sstream>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test [[gnu::unused]] = true;
|
||||
|
||||
std::stringstream str;
|
||||
__gnu_cxx::uniform_inside_sphere_distribution<3> u(8.0), v(8.0);
|
||||
std::minstd_rand0 rng;
|
||||
|
||||
u(rng); // advance
|
||||
str << u;
|
||||
|
||||
str >> v;
|
||||
|
||||
VERIFY( u == v );
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue