From 8da53c5f262b09756e1a93257cdcd5be25807839 Mon Sep 17 00:00:00 2001
From: ladevieq <ladevie.quentin@gmail.com>
Date: Mon, 21 Dec 2020 23:13:25 +0100
Subject: Movable and rotatable camera + dielectric materials

---
 include/vec3.hpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include/vec3.hpp')

diff --git a/include/vec3.hpp b/include/vec3.hpp
index 317f99b..7d38472 100644
--- a/include/vec3.hpp
+++ b/include/vec3.hpp
@@ -53,6 +53,8 @@ vec3 operator/(vec3 u, double scale);
 
 vec3 reflect(vec3 v, vec3 n);
 
+vec3 refract(const vec3& uv, const vec3& n, double etai_over_etat);
+
 std::ostream& operator<<(std::ostream& out, vec3 vec);
 
 vec3 random_in_unit_sphere();
-- 
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