Wires are now actually hidden by floor tiles. (#181)

Content.Client/GameObjects/EntitySystems/SubFloorHideSystem.cs

@@ -0,0 +1,80 @@
+using Content.Client.GameObjects.Components;
+using Content.Shared.Maps;
+using SS14.Client.Interfaces.GameObjects.Components;
+using SS14.Shared.GameObjects.Components.Transform;
+using SS14.Shared.GameObjects.Systems;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.Interfaces.Map;
+using SS14.Shared.IoC;
+using SS14.Shared.Map;
+
+namespace Content.Client.GameObjects.EntitySystems
+{
+    /// <summary>
+    ///     Entity system backing <see cref="SubFloorHideComponent"/>.
+    /// </summary>
+    internal sealed class SubFloorHideSystem : EntitySystem
+    {
+#pragma warning disable 649
+        [Dependency] private readonly IMapManager _mapManager;
+        [Dependency] private readonly ITileDefinitionManager _tileDefinitionManager;
+#pragma warning restore 649
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            IoCManager.InjectDependencies(this);
+
+            _mapManager.GridChanged += MapManagerOnGridChanged;
+            _mapManager.TileChanged += MapManagerOnTileChanged;
+
+            SubscribeEvent<SubFloorHideDirtyEvent>(HandleDirtyEvent);
+        }
+
+        private void HandleDirtyEvent(object sender, SubFloorHideDirtyEvent ev)
+        {
+            if (!(sender is IEntity senderEnt))
+            {
+                return;
+            }
+
+            var sprite = senderEnt.GetComponent<ISpriteComponent>();
+            var grid = _mapManager.GetGrid(senderEnt.Transform.GridID);
+            var position = senderEnt.Transform.GridPosition;
+            var tileRef = grid.GetTile(position);
+            var tileDef = (ContentTileDefinition) _tileDefinitionManager[tileRef.Tile.TileId];
+            sprite.Visible = tileDef.IsSubFloor;
+        }
+
+        private void MapManagerOnTileChanged(object sender, TileChangedEventArgs e)
+        {
+            UpdateTile(_mapManager.GetGrid(e.NewTile.GridIndex), e.NewTile.GridTile);
+        }
+
+        private void MapManagerOnGridChanged(object sender, GridChangedEventArgs e)
+        {
+            foreach (var modified in e.Modified)
+            {
+                UpdateTile(e.Grid, modified.position);
+            }
+        }
+
+        private void UpdateTile(IMapGrid grid, MapIndices position)
+        {
+            var tile = grid.GetTile(position);
+            var tileDef = (ContentTileDefinition) _tileDefinitionManager[tile.Tile.TileId];
+            foreach (var snapGridComponent in grid.GetSnapGridCell(position, SnapGridOffset.Center))
+            {
+                var entity = snapGridComponent.Owner;
+                if (!entity.HasComponent<SubFloorHideComponent>() ||
+                    !entity.TryGetComponent(out ISpriteComponent spriteComponent))
+                {
+                    continue;
+                }
+
+                spriteComponent.Visible = tileDef.IsSubFloor;
+            }
+        }
+    }
+}