From 70d752e5d0883ca4a7d471cff65dbcce2eb1b746 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 19 Feb 2015 13:24:00 +1100
Subject: [PATCH] matrix: prefer operators to functions

---
 matrix.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/matrix.cpp b/matrix.cpp
index 446fc354..071f61f2 100644
--- a/matrix.cpp
+++ b/matrix.cpp
@@ -479,7 +479,7 @@ matrix<T>::look_at (util::point<3,T> eye,
                     util::point<3,T> centre,
                     util::vector<3,T> up)
 {
-    const auto f = eye.to (centre).normalise ();
+    const auto f = (centre - eye).normalise ();
     const auto s = cross (f, up).normalise ();
     const auto u = cross (s, f);