Fixed ragdolls colliding with stairs when swimming even if not steering upwards, AI steering fixes

Subsurface/Source/Characters/AI/Objectives/AIObjectiveIdle.cs

@@ -82,10 +82,14 @@ namespace Barotrauma
                     else if (leftDist < WallAvoidDistance)
                     {
                         pathSteering.SteeringManual(deltaTime, Vector2.UnitX * (WallAvoidDistance-leftDist)/WallAvoidDistance);
+                        pathSteering.WanderAngle = 0.0f;
+                        return;
                     }
                     else if (rightDist < WallAvoidDistance)
                     {
                         pathSteering.SteeringManual(deltaTime, -Vector2.UnitX * (WallAvoidDistance-rightDist)/WallAvoidDistance);
+                        pathSteering.WanderAngle = MathHelper.Pi;
+                        return;
                     }
                 }
 
@@ -96,6 +100,8 @@ namespace Barotrauma
                 else
                 {
                     character.AIController.SteeringManager.SteeringWander();
+                    //reset vertical steering to prevent dropping down from platforms etc
+                    character.AIController.SteeringManager.ResetY();
                 }
 
                 return;                

Subsurface/Source/Characters/AI/SteeringManager.cs

@@ -60,6 +60,16 @@ namespace Barotrauma
             steering = Vector2.Zero;
         }
 
+        public void ResetX()
+        {
+            steering.X = 0.0f;
+        }
+
+        public void ResetY()
+        {
+            steering.Y = 0.0f;
+        }
+
         public virtual void Update(float speed = 1.0f)
         {
             if (steering == Vector2.Zero || !MathUtils.IsValid(steering))