From bea7d61fd9d9cafa43cdc313780257eea09a190b Mon Sep 17 00:00:00 2001
From: Aaron Franke <arnfranke@yahoo.com>
Date: Tue, 6 Oct 2020 15:43:47 -0400
Subject: Improve the Vector2 rotated code in C#

---
 modules/mono/glue/GodotSharp/GodotSharp/Core/Vector2.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'modules/mono')

diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Vector2.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Vector2.cs
index 3dff37279b..d536b14eac 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Vector2.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Vector2.cs
@@ -437,8 +437,11 @@ namespace Godot
         /// <returns>The rotated vector.</returns>
         public Vector2 Rotated(real_t phi)
         {
-            real_t rads = Angle() + phi;
-            return new Vector2(Mathf.Cos(rads), Mathf.Sin(rads)) * Length();
+            real_t sine = Mathf.Sin(phi);
+            real_t cosi = Mathf.Cos(phi);
+            return new Vector2(
+                x * cosi - y * sine,
+                x * sine + y * cosi);
         }
 
         /// <summary>
-- 
cgit v1.2.3