- 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;