Added world sprite system (#397)

* Added world sprite system

* Added important comment

Content.Client/_CP14/WorldSprite/CP14WorldSpriteComponent.cs

@@ -0,0 +1,10 @@
+namespace Content.Client._CP14.WorldSprite;
+
+/// <summary>
+/// RUN, IF YOU SEE THE CODE TO THIS FUCKING THING, YOU'LL DIE ON THE SPOT.
+/// </summary>
+[RegisterComponent]
+public sealed partial class CP14WorldSpriteComponent : Component
+{
+    public bool Inited;
+}

Content.Client/_CP14/WorldSprite/CP14WorldSpriteSystem.cs

@@ -0,0 +1,65 @@
+using Content.Shared._CP14.WorldSprite;
+using Content.Shared.Throwing;
+using Robust.Client.GameObjects;
+using Robust.Shared.Map.Components;
+
+namespace Content.Client._CP14.WorldSprite;
+
+public sealed class CP14WorldSpriteSystem : EntitySystem
+{
+    [Dependency] private readonly AppearanceSystem _appearance = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+#if DEBUG
+        SubscribeLocalEvent<CP14WorldSpriteComponent, ComponentInit>(OnComponentInit);
+#endif
+
+        SubscribeLocalEvent<CP14WorldSpriteComponent, EntParentChangedMessage>(OnParentChanged);
+        SubscribeLocalEvent<CP14WorldSpriteComponent, ThrownEvent>(OnThrown);
+    }
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var query = EntityQueryEnumerator<CP14WorldSpriteComponent>();
+        while (query.MoveNext(out var uid, out var worldSpriteComponent))
+        {
+            if (worldSpriteComponent.Inited)
+                continue;
+
+            Update(uid);
+        }
+    }
+
+#if DEBUG
+    private void OnComponentInit(Entity<CP14WorldSpriteComponent> entity, ref ComponentInit args)
+    {
+        if (!HasComp<AppearanceComponent>(entity))
+            Log.Error($"Requires an {nameof(AppearanceComponent)} for {entity}");
+    }
+#endif
+
+    private void OnParentChanged(Entity<CP14WorldSpriteComponent> entity, ref EntParentChangedMessage args)
+    {
+        Update(entity);
+    }
+
+    private void OnThrown(Entity<CP14WorldSpriteComponent> entity, ref ThrownEvent args)
+    {
+        // Idk, but throw don't call reparent
+        Update(entity, args.User);
+    }
+
+    private void Update(EntityUid entity, EntityUid? parent = null)
+    {
+        parent ??= Transform(entity).ParentUid;
+
+        var inWorld = HasComp<MapComponent>(parent) || HasComp<MapGridComponent>(parent);
+
+        _appearance.SetData(entity, WorldSpriteVisualLayers.Layer, inWorld);
+    }
+}

Content.Server/Entry/IgnoredComponents.cs

@@ -4,7 +4,8 @@ namespace Content.Server.Entry
     public static class IgnoredComponents
     {
         public static string[] List => new[] {
-            "CP14WaveShader", //CP14 Wave shader
+            "CP14WaveShader", // CP14 Wave shader
+            "CP14WorldSprite", // CP14 World Sprite
             "ConstructionGhost",
             "IconSmooth",
             "InteractionOutline",

Content.Shared/_CP14/WorldSprite/WorldSpriteVisualLayer.cs

@@ -0,0 +1,6 @@
+namespace Content.Shared._CP14.WorldSprite;
+
+public enum WorldSpriteVisualLayers : byte
+{
+    Layer,
+}

Resources/Prototypes/_CP14/debug.yml

@@ -0,0 +1,31 @@
+- type: entity
+  parent: BaseItem
+  id: CP14DebugWorldSprite
+  name: strange copper bar
+  suffix: CP, DEBUG
+  components:
+  # Just copy me, I am block with name Bob
+  - type: Appearance
+  - type: CP14WorldSprite
+  - type: GenericVisualizer
+    visuals:
+      enum.WorldSpriteVisualLayers.Layer:
+        world:
+          True:
+            visible: true
+          False:
+            visible: false
+        content:
+          True:
+            visible: false
+          False:
+            visible: true
+  # Just copy me, I am block with name Bob
+
+  - type: Sprite
+    sprite: /Textures/_CP14/Objects/Materials/copper_bar.rsi
+    layers:
+      - map: ["world"]
+        state: bar
+      - map: ["content"]
+        state: bar_2