From ca2993cadcd864aa4949cfb445b1f38954a861e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Sun, 30 Sep 2012 02:05:40 +0200
Subject: [PATCH] Don't compute sine and cosine more times than necessary.

---
 src/Math/Matrix3.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Math/Matrix3.h b/src/Math/Matrix3.h
index 284425446..7be868204 100644
--- a/src/Math/Matrix3.h
+++ b/src/Math/Matrix3.h
@@ -72,9 +72,12 @@ template<class T> class Matrix3: public Matrix<3, T> {
          *      rad()
          */
         static Matrix3<T> rotation(T angle) {
+            T sine = std::sin(angle);
+            T cosine = std::cos(angle);
+
             return Matrix3<T>( /* Column-major! */
-                T(cos(angle)), T(sin(angle)), T(0),
-                -T(sin(angle)), T(cos(angle)), T(0),
+                cosine, sine, T(0),
+                -sine, cosine, T(0),
                 T(0), T(0), T(1)
             );
         }