From c2f4359bd742030b3a2236f3a2c828b8957e18bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Thu, 21 Feb 2013 21:18:42 +0100
Subject: [PATCH] Math: added strongly-typed asin(), acos() and atan().

---
 src/Math/Functions.h            | 9 +++++++++
 src/Math/Test/FunctionsTest.cpp | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/src/Math/Functions.h b/src/Math/Functions.h
index a887121a8..e1b5582e7 100644
--- a/src/Math/Functions.h
+++ b/src/Math/Functions.h
@@ -87,6 +87,15 @@ template<class T> inline T cos(Deg<T> angle) { return cos(Rad<T>(angle)); }
 template<class T> inline T tan(Deg<T> angle) { return tan(Rad<T>(angle)); }
 #endif
 
+/** @brief Arc sine */
+template<class T> inline Rad<T> asin(T value) { return Rad<T>(std::asin(value)); }
+
+/** @brief Arc cosine */
+template<class T> inline Rad<T> acos(T value) { return Rad<T>(std::acos(value)); }
+
+/** @brief Arc tangent */
+template<class T> inline Rad<T> atan(T value) { return Rad<T>(std::atan(value)); }
+
 /**
 @{ @name Scalar/vector functions
 
diff --git a/src/Math/Test/FunctionsTest.cpp b/src/Math/Test/FunctionsTest.cpp
index 70d261c66..c0d8e2809 100644
--- a/src/Math/Test/FunctionsTest.cpp
+++ b/src/Math/Test/FunctionsTest.cpp
@@ -251,10 +251,15 @@ void FunctionsTest::log2() {
 void FunctionsTest::trigonometric() {
     CORRADE_COMPARE(Math::sin(Deg(30.0f)), 0.5f);
     CORRADE_COMPARE(Math::sin(Rad(Constants::pi()/6)), 0.5f);
+    CORRADE_COMPARE_AS(Math::asin(0.5f), Deg(30.0f), Deg);
+
     CORRADE_COMPARE(Math::cos(Deg(60.0f)), 0.5f);
     CORRADE_COMPARE(Math::cos(Rad(Constants::pi()/3)), 0.5f);
+    CORRADE_COMPARE_AS(Math::acos(0.5f), Deg(60.0f), Deg);
+
     CORRADE_COMPARE(Math::tan(Deg(45.0f)), 1.0f);
     CORRADE_COMPARE(Math::tan(Rad(Constants::pi()/4)), 1.0f);
+    CORRADE_COMPARE_AS(Math::atan(1.0f), Deg(45.0f), Deg);
 }
 
 }}}