From de85dcff9760b77ad0d2cd06682f44b3f3c9716c Mon Sep 17 00:00:00 2001
From: Matthias Grob <maetugr@gmail.com>
Date: Tue, 26 Nov 2019 13:46:45 +0100
Subject: [PATCH] Vector: switch read only functions to const (#108)

---
 matrix/Vector.hpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/matrix/Vector.hpp b/matrix/Vector.hpp
index 4af611542f..fe83505af9 100644
--- a/matrix/Vector.hpp
+++ b/matrix/Vector.hpp
@@ -92,7 +92,7 @@ public:
         return (*this) / norm();
     }
 
-    Vector unit_or_zero(const Type eps = Type(1e-5)) {
+    Vector unit_or_zero(const Type eps = Type(1e-5)) const {
         const Type n = norm();
         if (n > eps) {
             return (*this) / n;
@@ -104,8 +104,7 @@ public:
         return unit();
     }
 
-    bool longerThan(Type testVal)
-    {
+    bool longerThan(Type testVal) const {
         return norm_squared() > testVal*testVal;
     }