- doors aren't ignored when checking visibility during waypoint generation or when finding a starting node for a path

- AICharacter will mark their path unreachable if their path is blocked by a door they cant open (may happen if someone closes the door after calculating the path)
- fixed exception when creating a Steering component when there's no active GameSession (i.e. in the editor)

Subsurface/Source/Characters/AI/HumanAIController.cs

@@ -185,6 +185,11 @@ namespace Barotrauma
                     new Vector2(pathSteering.CurrentPath.Nodes[i].DrawPosition.X, -pathSteering.CurrentPath.Nodes[i].DrawPosition.Y),
                     new Vector2(pathSteering.CurrentPath.Nodes[i - 1].DrawPosition.X, -pathSteering.CurrentPath.Nodes[i - 1].DrawPosition.Y),
                     Color.LightGreen);
+
+                spriteBatch.DrawString(GUI.SmallFont, 
+                    pathSteering.CurrentPath.Nodes[i].ID.ToString(), 
+                    new Vector2(pathSteering.CurrentPath.Nodes[i].DrawPosition.X, -pathSteering.CurrentPath.Nodes[i].DrawPosition.Y - 10), 
+                    Color.LightGreen);
             }
         }
     }

Subsurface/Source/Characters/AI/IndoorsSteeringManager.cs

@@ -258,6 +258,12 @@ namespace Barotrauma
 
                     if (closestButton != null)
                     {
+                        if (!closestButton.HasRequiredItems(character, false) && shouldBeOpen)
+                        {
+                            currentPath.Unreachable = true;
+                            return;
+                        }
+
                         closestButton.Item.Pick(character, false, true);
                         break;
                     }

Subsurface/Source/Characters/AI/PathFinder.cs

@@ -172,7 +172,12 @@ namespace Barotrauma
                             start, node.Waypoint.SimPosition, null, 
                             Physics.CollisionWall | Physics.CollisionLevel | Physics.CollisionStairs | Physics.CollisionPlatform);
 
-                        if (body != null && body.UserData is Structure && !((Structure)body.UserData).IsPlatform) continue;
+                        if (body != null)
+                        {
+                            if (body.UserData is Structure && !((Structure)body.UserData).IsPlatform) continue;
+                            if (body.UserData is Item && body.FixtureList[0].CollisionCategories.HasFlag(Physics.CollisionWall)) continue;
+
+                        }
                     }
 
                     closestDist = dist;

Subsurface/Source/Items/Components/Machines/Steering.cs

@@ -123,14 +123,14 @@ namespace Barotrauma.Items.Components
                        
             levelStartTickBox = new GUITickBox(
                 new Rectangle(5, 70, 15, 15),
-                ToolBox.LimitString(GameMain.GameSession.StartLocation.Name, 20), 
+                GameMain.GameSession == null ? "" : ToolBox.LimitString(GameMain.GameSession.StartLocation.Name, 20), 
                 Alignment.TopLeft, GUI.SmallFont, GuiFrame);
             levelStartTickBox.Enabled = false;
             levelStartTickBox.OnSelected = SelectDestination;
 
             levelEndTickBox = new GUITickBox(
                 new Rectangle(5, 90, 15, 15),
-                ToolBox.LimitString(GameMain.GameSession.EndLocation.Name, 20),
+                GameMain.GameSession == null ? "" : ToolBox.LimitString(GameMain.GameSession.StartLocation.Name, 20),
                 Alignment.TopLeft, GUI.SmallFont, GuiFrame);
             levelEndTickBox.Enabled = false;
             levelEndTickBox.OnSelected = SelectDestination;

Subsurface/Source/Map/WayPoint.cs

@@ -437,11 +437,11 @@ namespace Barotrauma
                 WayPoint[] stairPoints = new WayPoint[2];
 
                 stairPoints[0] = new WayPoint(
-                    new Vector2(stairs.Rect.X - 75.0f,
+                    new Vector2(stairs.Rect.X - 32.0f,
                         stairs.Rect.Y - (stairs.StairDirection == Direction.Left ? 80 : stairs.Rect.Height) + heightFromFloor), SpawnType.Path, submarine);
 
                 stairPoints[1] = new WayPoint(
-                  new Vector2(stairs.Rect.Right + 75.0f,
+                  new Vector2(stairs.Rect.Right + 32.0f,
                       stairs.Rect.Y - (stairs.StairDirection == Direction.Left ? stairs.Rect.Height : 80) + heightFromFloor), SpawnType.Path, submarine);
 
                 for (int i = 0; i < 2; i++ )
@@ -550,9 +550,15 @@ namespace Barotrauma
                 for (int dir = -1; dir <= 1; dir += 2)
                 {
                     float tolerance = gap.IsRoomToRoom ? 50.0f : outSideWaypointInterval / 2.0f;
-                    WayPoint closest = wayPoint.FindClosest(dir, true, new Vector2(-tolerance, tolerance));
+
-                    if (closest == null) continue;
+                    WayPoint closest = wayPoint.FindClosest(
-                    wayPoint.ConnectTo(closest);
+                        dir, true, new Vector2(-tolerance, tolerance), 
+                        gap.ConnectedDoor == null ? null : gap.ConnectedDoor.Body.FarseerBody);
+
+                    if (closest != null)
+                    {
+                        wayPoint.ConnectTo(closest);
+                    }
                 }
             }
 
@@ -582,7 +588,7 @@ namespace Barotrauma
             }
         }
 
-        private WayPoint FindClosest(int dir, bool horizontalSearch, Vector2 tolerance)
+        private WayPoint FindClosest(int dir, bool horizontalSearch, Vector2 tolerance, Body ignoredBody = null)
         {
             if (dir != -1 && dir != 1) return null;
 
@@ -614,9 +620,9 @@ namespace Barotrauma
                 if (closest == null || dist < closestDist)
                 {
                     var body = Submarine.CheckVisibility(SimPosition, wp.SimPosition, true);
-                    if (body != null)
+                    if (body != null && body != ignoredBody && !(body.UserData is Submarine))
                     {
-                        if (body.UserData is Structure) continue;
+                        if (body.UserData is Structure || body.FixtureList[0].CollisionCategories.HasFlag(Physics.CollisionWall)) continue;
                     }
 
                     closestDist = dist;

Subsurface/Source/Physics/PhysicsBody.cs

@@ -231,7 +231,7 @@ namespace Barotrauma
         public PhysicsBody(Body farseerBody)
         {
             body = farseerBody;
-            body.UserData = this;
+            if (body.UserData == null) body.UserData = this;
 
             LastSentPosition = body.Position;