Update Atlas system

LandblockExtraction/AtlasMaker/TerrainAtlasManager.cs

@@ -0,0 +1,19 @@
+using LandblockExtraction.DatEngine;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace LandblockExtraction.AtlasMaker;
+public class TerrainAtlasManager {
+    private PortalEngine portalEngine;
+
+    public Dictionary<uint, Vector2> textureCoord;
+
+    public TerrainAtlasManager(PortalEngine portalEngine) {
+        this.portalEngine = portalEngine;
+        textureCoord = new Dictionary<uint, Vector2>();
+    }
+}