Pathfinder rework (#11452)

Content.Server/NPC/Pathfinding/GridPathfindingChunk.cs

@@ -0,0 +1,33 @@
+using Content.Shared.NPC;
+
+namespace Content.Server.NPC.Pathfinding;
+
+public sealed class GridPathfindingChunk
+{
+    // TODO: Make this a 1d array
+    public readonly PathfindingBreadcrumb[,] Points = new PathfindingBreadcrumb[
+        (SharedPathfindingSystem.ChunkSize) * SharedPathfindingSystem.SubStep,
+        (SharedPathfindingSystem.ChunkSize) * SharedPathfindingSystem.SubStep];
+
+    public Vector2i Origin;
+
+    public readonly List<PathPoly>[] Polygons = new List<PathPoly>[SharedPathfindingSystem.ChunkSize * SharedPathfindingSystem.ChunkSize];
+
+    /// <summary>
+    /// The relevant polygon for this chunk's portals
+    /// </summary>
+    public readonly Dictionary<PathPortal, PathPoly> PortalPolys = new();
+
+    /// <summary>
+    /// This chunk's portals.
+    /// </summary>
+    public readonly List<PathPortal> Portals = new();
+
+    public GridPathfindingChunk()
+    {
+        for (var x = 0; x < Polygons.Length; x++)
+        {
+            Polygons[x] = new List<PathPoly>();
+        }
+    }
+}