From 0e8bb178f750f1a147492ba40c985fc15b0a408f Mon Sep 17 00:00:00 2001
From: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>
Date: Sat, 23 May 2020 15:33:01 +0200
Subject: [PATCH] Fixes click-facing giving you NaN rotation if you interact
 with something at the exact same position as you.

---
 .../EntitySystems/Click/InteractionSystem.cs           | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs b/Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs
index f4530fbf1a..a123560120 100644
--- a/Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs
+++ b/Content.Server/GameObjects/EntitySystems/Click/InteractionSystem.cs
@@ -478,8 +478,14 @@ namespace Content.Server.GameObjects.EntitySystems
 
             var item = hands.GetActiveHand?.Owner;
 
-            if(ActionBlockerSystem.CanChangeDirection(player))
-                playerTransform.LocalRotation = new Angle(coordinates.ToMapPos(_mapManager) - playerTransform.MapPosition.Position);
+            if (ActionBlockerSystem.CanChangeDirection(player))
+            {
+                var diff = coordinates.ToMapPos(_mapManager) - playerTransform.MapPosition.Position;
+                if (diff.LengthSquared > 0.01f)
+                {
+                    playerTransform.LocalRotation = new Angle(diff);
+                }
+            }
 
             if (!ActionBlockerSystem.CanInteract(player))
             {