1 files changed, 3 insertions, 0 deletions
diff --git a/utility/maths.h b/utility/maths.h
index 0b379d0..22688cb 100644
--- a/utility/maths.h
+++ b/utility/maths.h
@@ -9,6 +9,9 @@ using Arc = std::pair<float, float>;
 
 constexpr const glm::vec3 up {0, 1, 0};
 constexpr const glm::vec3 north {0, 0, 1};
+constexpr const glm::vec3 south {0, 0, -1};
+constexpr const glm::vec3 east {-1, 0, 0};
+constexpr const glm::vec3 west {1, 0, 0};
 constexpr auto half_pi {glm::half_pi<float>()};
 constexpr auto pi {glm::pi<float>()};
 constexpr auto two_pi {glm::two_pi<float>()};