Station maps (#13027)

Content.Shared/Pinpointer/SharedNavMapSystem.cs

@@ -0,0 +1,45 @@
+using Robust.Shared.Serialization;
+using Robust.Shared.Utility;
+
+namespace Content.Shared.Pinpointer;
+
+public abstract class SharedNavMapSystem : EntitySystem
+{
+    public const byte ChunkSize = 4;
+
+    /// <summary>
+    /// Converts the chunk's tile into a bitflag for the slot.
+    /// </summary>
+    public static int GetFlag(Vector2i relativeTile)
+    {
+        return 1 << (relativeTile.X * ChunkSize + relativeTile.Y);
+    }
+
+    /// <summary>
+    /// Converts the chunk's tile into a bitflag for the slot.
+    /// </summary>
+    public static Vector2i GetTile(int flag)
+    {
+        var value = Math.Log2(flag);
+        var x = (int) value / ChunkSize;
+        var y = (int) value % ChunkSize;
+        var result = new Vector2i(x, y);
+
+        DebugTools.Assert(GetFlag(result) == flag);
+
+        return new Vector2i(x, y);
+    }
+
+    [Serializable, NetSerializable]
+    protected sealed class NavMapComponentState : ComponentState
+    {
+        public Dictionary<Vector2i, int> TileData = new();
+    }
+
+    [Serializable, NetSerializable]
+    protected sealed class NavMapDiffComponentState : ComponentState
+    {
+        public Dictionary<Vector2i, int> TileData = new();
+        public List<Vector2i> RemovedChunks = new();
+    }
+}