Fix various issues with the emitter (#3329)

Co-authored-by: cyclowns <cyclowns@protonmail.ch>

Content.Server/GameObjects/Components/AnchorableComponent.cs

@@ -1,4 +1,5 @@
 #nullable enable
+using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Threading.Tasks;
 using Content.Server.GameObjects.Components.Interactable;
@@ -74,6 +75,10 @@ namespace Content.Server.GameObjects.Components
             var physics = Owner.GetComponent<IPhysBody>();
             physics.BodyType = BodyType.Static;
 
+            // Snap rotation to cardinal (multiple of 90)
+            var rot = Owner.Transform.LocalRotation;
+            Owner.Transform.LocalRotation = Math.Round(rot / (Math.PI / 2)) * (Math.PI / 2);
+
             if (Owner.TryGetComponent(out PullableComponent? pullableComponent))
             {
                 if (pullableComponent.Puller != null)