Imported Upstream version 1.57.0
[platform/upstream/boost.git] / libs / random / test / test_uniform_on_sphere.cpp
1 /* test_uniform_on_sphere.cpp
2  *
3  * Copyright Steven Watanabe 2011
4  * Distributed under the Boost Software License, Version 1.0. (See
5  * accompanying file LICENSE_1_0.txt or copy at
6  * http://www.boost.org/LICENSE_1_0.txt)
7  *
8  * $Id$
9  *
10  */
11
12 #include <boost/random/uniform_on_sphere.hpp>
13 #include <boost/random/uniform_int.hpp>
14 #include <boost/math/distributions/uniform.hpp>
15 #include <cmath>
16
17 class uniform_on_sphere_test {
18 public:
19     typedef double result_type;
20     uniform_on_sphere_test(int dims, int x, int y)
21         : impl(dims), idx1(x), idx2(y) {}
22     template<class Engine>
23     result_type operator()(Engine& rng) {
24         const boost::random::uniform_on_sphere<>::result_type& tmp = impl(rng);
25         // This should be uniformly distributed in [-pi,pi)
26         return std::atan2(tmp[idx1], tmp[idx2]);
27     }
28 private:
29     boost::random::uniform_on_sphere<> impl;
30     int idx1, idx2;
31 };
32
33 static const double pi = 3.14159265358979323846;
34
35 #define BOOST_RANDOM_DISTRIBUTION uniform_on_sphere_test
36 #define BOOST_RANDOM_DISTRIBUTION_NAME uniform_on_sphere
37 #define BOOST_MATH_DISTRIBUTION boost::math::uniform
38 #define BOOST_RANDOM_ARG1_TYPE double
39 #define BOOST_RANDOM_ARG1_NAME n
40 #define BOOST_RANDOM_ARG1_DEFAULT 6
41 #define BOOST_RANDOM_ARG1_DISTRIBUTION(n) boost::uniform_int<>(2, n)
42 #define BOOST_RANDOM_DISTRIBUTION_INIT (n, 0, n-1)
43 #define BOOST_MATH_DISTRIBUTION_INIT (-pi, pi)
44
45 #include "test_real_distribution.ipp"