From e02efd2f7bd0428b3b047f3afc59d219050d15c6 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Sat, 10 Apr 2021 16:47:51 +0300
Subject: [PATCH] Add 2D angle -> direction function

---
 libs/geom/include/psemek/geom/vector.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libs/geom/include/psemek/geom/vector.hpp b/libs/geom/include/psemek/geom/vector.hpp
index 0e9681f3..af8e11be 100644
--- a/libs/geom/include/psemek/geom/vector.hpp
+++ b/libs/geom/include/psemek/geom/vector.hpp
@@ -302,6 +302,12 @@ namespace psemek::geom
 		return ort(v0, v1);
 	}
 
+	template <typename T>
+	vector<T, 2> direction(T angle)
+	{
+		return {std::cos(angle), std::sin(angle)};
+	}
+
 	template <typename T, std::size_t N>
 	vector<T, N> pointwise_mult(vector<T, N> const & v0, vector<T, N> const & v1)
 	{