1// Boost.Units - A C++ library for zero-overhead dimensional analysis and
2// unit/quantity manipulation and conversion
3//
4// Copyright (C) 2009 Steven Watanabe
5//
6// Distributed under the Boost Software License, Version 1.0. (See
7// accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt)
9
10/**
11\file
12
13\brief test_trig.cpp
14
15\details
16Test trigonometric functions.
17
18Output:
19@verbatim
20@endverbatim
21**/
22
23#include <cmath>
24#include <boost/units/cmath.hpp>
25#include <boost/units/io.hpp>
26#include <boost/units/systems/si/plane_angle.hpp>
27#include <boost/units/systems/si/length.hpp>
28#include <boost/units/systems/si/dimensionless.hpp>
29#include <boost/units/systems/angle/degrees.hpp>
30
31#include "test_close.hpp"
32
33using boost::units::si::radians;
34using boost::units::si::si_dimensionless;
35using boost::units::degree::degrees;
36BOOST_UNITS_STATIC_CONSTANT(degree_dimensionless, boost::units::degree::dimensionless);
37using boost::units::si::meters;
38BOOST_UNITS_STATIC_CONSTANT(heterogeneous_dimensionless, boost::units::reduce_unit<boost::units::si::dimensionless>::type);
39
40void test_sin() {
41 BOOST_TEST_EQ(boost::units::sin(2.0 * radians), std::sin(2.0) * si_dimensionless);
42 BOOST_UNITS_TEST_CLOSE(static_cast<double>(boost::units::sin(15.0 * degrees)), 0.2588, 0.0004);
43}
44
45void test_cos() {
46 BOOST_TEST_EQ(boost::units::cos(2.0 * radians), std::cos(2.0) * si_dimensionless);
47 BOOST_UNITS_TEST_CLOSE(static_cast<double>(boost::units::cos(75.0 * degrees)), 0.2588, 0.0004);
48}
49
50void test_tan() {
51 BOOST_TEST_EQ(boost::units::tan(2.0 * radians), std::tan(2.0) * si_dimensionless);
52 BOOST_UNITS_TEST_CLOSE(static_cast<double>(boost::units::tan(45.0 * degrees)), 1.0, 0.0001);
53}
54
55void test_asin() {
56 BOOST_TEST_EQ(boost::units::asin(0.2 * si_dimensionless), std::asin(0.2) * radians);
57 BOOST_UNITS_TEST_CLOSE(boost::units::asin(0.5 * degree_dimensionless).value(), 30.0, 0.0001);
58 BOOST_TEST_EQ(boost::units::asin(0.2 * heterogeneous_dimensionless).value(), std::asin(0.2));
59}
60
61void test_acos() {
62 BOOST_TEST_EQ(boost::units::acos(0.2 * si_dimensionless), std::acos(0.2) * radians);
63 BOOST_UNITS_TEST_CLOSE(boost::units::acos(0.5 * degree_dimensionless).value(), 60.0, 0.0001);
64 BOOST_TEST_EQ(boost::units::acos(0.2 * heterogeneous_dimensionless).value(), std::acos(0.2));
65}
66
67void test_atan() {
68 BOOST_TEST_EQ(boost::units::atan(0.2 * si_dimensionless), std::atan(0.2) * radians);
69 BOOST_UNITS_TEST_CLOSE(boost::units::atan(1.0 * degree_dimensionless).value(), 45.0, 0.0001);
70 BOOST_TEST_EQ(boost::units::atan(0.2 * heterogeneous_dimensionless).value(), std::atan(0.2));
71}
72
73void test_atan2() {
74 BOOST_TEST_EQ(boost::units::atan2(0.2 * si_dimensionless, 0.3 * si_dimensionless), std::atan2(0.2, 0.3) * radians);
75 BOOST_TEST_EQ(boost::units::atan2(0.2 * meters, 0.3 * meters), std::atan2(0.2, 0.3) * radians);
76 BOOST_UNITS_TEST_CLOSE(boost::units::atan2(0.8660*degree_dimensionless,0.5*degree_dimensionless).value(), 60., 0.0002);
77 BOOST_TEST_EQ(boost::units::atan2(0.2 * heterogeneous_dimensionless, 0.3 * heterogeneous_dimensionless).value(), std::atan2(0.2, 0.3));
78}
79
80int main()
81{
82 test_sin();
83 test_cos();
84 test_tan();
85 test_asin();
86 test_acos();
87 test_atan();
88 test_atan2();
89 return boost::report_errors();
90}
91

source code of boost/libs/units/test/test_trig.cpp