Airlocks rewritten to use appearances, use less ugly sprite from Eris.

Content.Client/GameObjects/Components/Doors/AirlockVisualizer2D.cs

@@ -0,0 +1,40 @@
+using System;
+using Content.Shared.GameObjects.Components.Doors;
+using SS14.Client.GameObjects;
+using SS14.Client.Interfaces.GameObjects.Components;
+
+namespace Content.Client.GameObjects.Components.Doors
+{
+    public class AirlockVisualizer2D : AppearanceVisualizer
+    {
+        public override void OnChangeData(AppearanceComponent component)
+        {
+            base.OnChangeData(component);
+
+            var sprite = component.Owner.GetComponent<ISpriteComponent>();
+            if (!component.TryGetData(DoorVisuals.VisualState, out DoorVisualState state))
+            {
+                state = DoorVisualState.Closed;
+            }
+
+            switch (state)
+            {
+                case DoorVisualState.Closed:
+                case DoorVisualState.Closing:
+                    sprite.LayerSetState(DoorVisualLayers.Base, "closed");
+                    break;
+                case DoorVisualState.Opening:
+                case DoorVisualState.Open:
+                    sprite.LayerSetState(DoorVisualLayers.Base, "open");
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+    }
+
+    public enum DoorVisualLayers
+    {
+        Base
+    }
+}