From dd662f9c6ab376c1411ef5c703dfca08c069be2c Mon Sep 17 00:00:00 2001
From: Raul Santos <raulsntos@gmail.com>
Date: Sun, 3 Aug 2025 20:25:10 +0200
Subject: [PATCH] [.NET] Fix `Quaternion(Vector3, Vector3)` constructor when
 vectors are the same.

---
 modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs
index 334e35a4645..b662ab5d0b0 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs
@@ -576,6 +576,10 @@ namespace Godot
             {
                 if (d >= 0.0f)
                 {
+                    X = 0.0f;
+                    Y = 0.0f;
+                    Z = 0.0f;
+                    W = 1.0f;
                     return; // Vectors are same.
                 }
                 Vector3 axis = n0.GetAnyPerpendicular();