From e1c759e42996228e8a04aa7dcefeaed418522209 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Oudin?= <oudin@crans.org>
Date: Mon, 12 Feb 2018 01:26:51 +0100
Subject: [PATCH] Operator should be const

---
 spheroid.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spheroid.hpp b/spheroid.hpp
index 18a782a..407e445 100644
--- a/spheroid.hpp
+++ b/spheroid.hpp
@@ -19,7 +19,7 @@ class Spheroid : public ImplicitSurface {
         void set_stiffness(size_t _stiffness);
         void check_horizontal_plan_collision(double& height);
         void check_vertical_plan_collision(double& abscissa);
-        double operator() (double _x, double _y, double _z) {
+        double operator() (double _x, double _y, double _z) const {
             return (pow(_x - center.x, 2) / pow(q, 2)
                   + pow(_y - center.y, 2) / pow(q, 2)
                   + pow(_z - center.z, 2) / pow(p, 2) -1);