The construction system can now prevent recipes from being rotated.

Content.Client/Construction/ConstructionPlacementHijack.cs

@@ -8,15 +8,18 @@ using Robust.Shared.Map;
 
 namespace Content.Client.Construction
 {
-    public class ConstructionPlacementHijack : PlacementHijack
+    public sealed class ConstructionPlacementHijack : PlacementHijack
     {
         private readonly ConstructionSystem _constructionSystem;
         private readonly ConstructionPrototype _prototype;
 
+        public override bool CanRotate { get; }
+
         public ConstructionPlacementHijack(ConstructionSystem constructionSystem, ConstructionPrototype prototype)
         {
             _constructionSystem = constructionSystem;
             _prototype = prototype;
+            CanRotate = prototype.CanRotate;
         }
 
         /// <inheritdoc />

Content.Server/GameObjects/EntitySystems/ConstructionSystem.cs

@@ -448,7 +448,7 @@ namespace Content.Server.GameObjects.EntitySystems
             }
 
             structure.Transform.Coordinates = ev.Location;
-            structure.Transform.LocalRotation = ev.Angle;
+            structure.Transform.LocalRotation = constructionPrototype.CanRotate ? ev.Angle : Angle.South;
 
             RaiseNetworkEvent(new AckStructureConstructionMessage(ev.Ack));
 

Content.Shared/Construction/ConstructionPrototype.cs

@@ -54,6 +54,11 @@ namespace Content.Shared.Construction
 
         public string PlacementMode { get; private set; }
 
+        /// <summary>
+        ///     Whether this construction can be constructed rotated or not.
+        /// </summary>
+        public bool CanRotate { get; private set; }
+
         public IReadOnlyList<IConstructionCondition> Conditions => _conditions;
 
         public void LoadFrom(YamlMappingNode mapping)
@@ -71,6 +76,7 @@ namespace Content.Shared.Construction
             ser.DataField(this, x => x.PlacementMode, "placementMode", "PlaceFree");
             ser.DataField(this, x => x.CanBuildInImpassable, "canBuildInImpassable", false);
             ser.DataField(this, x => x.Category, "category", string.Empty);
+            ser.DataField(this, x => x.CanRotate, "canRotate", true);
             ser.DataField(ref _conditions, "conditions", new List<IConstructionCondition>());
         }
     }

Resources/Prototypes/Recipes/Construction/structures.yml

@@ -11,6 +11,7 @@
     state: wall_girder
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: wall
@@ -25,6 +26,7 @@
     state: full
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: reinforced wall
@@ -39,6 +41,7 @@
     state: rgeneric
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: low wall
@@ -55,6 +58,7 @@
     state: metal
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: window
@@ -71,6 +75,7 @@
     state: full
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: reinforced window
@@ -87,6 +92,7 @@
     state: full
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false
 
 - type: construction
   name: phoron window
@@ -103,3 +109,4 @@
     state: full
   objectType: Structure
   placementMode: SnapgridCenter
+  canRotate: false