Added robot asset and worked on placeholders. Placeholders are now able to be added to the game and later replaced by objects (Tested with Robot for now)

Assets/Objects/Robot.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://bccs6xik7xv8s"
+path="res://.godot/imported/Robot.glb-0808b8534e7a8abc9f0bb2bb7f5abb78.scn"
+
+[deps]
+
+source_file="res://Assets/Objects/Robot.glb"
+dest_files=["res://.godot/imported/Robot.glb-0808b8534e7a8abc9f0bb2bb7f5abb78.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

Prefabs/Robot.tscn

@@ -0,0 +1,5 @@
+[gd_scene format=3 uid="uid://cjae60v4c60vb"]
+
+[ext_resource type="PackedScene" uid="uid://bccs6xik7xv8s" path="res://Assets/Objects/Robot.glb" id="1_8peeh"]
+
+[node name="Robot" unique_id=1113392384 instance=ExtResource("1_8peeh")]

Scripts/Helpers/Placeholder.cs

@@ -0,0 +1,13 @@
+using Godot;
+
+public class Placeholder
+{
+    string name;
+    public Vector3 pos;
+
+    public Placeholder(string name, Vector3 pos){
+        this.name = name;
+        this.pos = pos;
+        GD.Print($"Generated placeholder {this.name}");
+    }
+}

Scripts/Helpers/Placeholder.cs.uid

@@ -0,0 +1 @@
+uid://cng1pe6j20vrr

Scripts/Helpers/ResourceLoader.cs

@@ -9,6 +9,11 @@ public partial class ResourceLoader
 	{
 		return GD.Load<PackedScene>($"res://Prefabs/Layer.tscn");
 	}
+
+	public static PackedScene LoadRobotPrefab()
+	{
+		return GD.Load<PackedScene>($"res://Prefabs/Robot.tscn");
+	}
 	
 	public static Dictionary<string, MeshInstance3D> LoadTiles()
 	{

Scripts/Helpers/WFC.cs

@@ -53,6 +53,7 @@ public class WFC
 		["corner_down_right"] = new() { Direction.Down, Direction.Right },
 
 		["junction"] = new() { Direction.Up, Direction.Down, Direction.Left, Direction.Right },
+		["gate"] = new() { Direction.Up, Direction.Down, Direction.Left, Direction.Right },
 
 		["border"] = new() { }
 	};
@@ -78,6 +79,8 @@ public class WFC
 		["end_left"] = 0.2f,
 		["end_right"] = 0.3f,
 
+		["gate"] = 0.1f,
+
 		["border"] = 0.0f
 	};
 

Scripts/World.cs

@@ -1,12 +1,12 @@
 using Godot;
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using static GameData;
 
 public partial class World : Node3D
 {
 	public Dictionary<string, MeshInstance3D> tileMeshes;
+	public Dictionary<string, List<Placeholder>> tilePlaceholders;
 	PackedScene layerPrefab = ResourceLoader.LoadLayerPrefab();
 	private Dictionary<string, MultiMeshInstance3D> multiMeshes = new();
 	private Dictionary<string, Mesh> meshLibrary = new();
@@ -17,8 +17,14 @@ public partial class World : Node3D
 	{
 		WFC.FillAdjacencies();
 		tileMeshes = ResourceLoader.LoadTiles();
+		tilePlaceholders = new Dictionary<string, List<Placeholder>>();
 		foreach (var kvp in tileMeshes)
 		{
+			tilePlaceholders.Add(kvp.Key, new List<Placeholder>());
+			foreach (MeshInstance3D child in kvp.Value.GetChildren())
+			{
+				tilePlaceholders[kvp.Key].Add(new Placeholder(child.Name, child.Transform.Origin));
+			}
 			var temp = kvp.Value;
 			meshLibrary[kvp.Key] = temp.Mesh;
 			temp.QueueFree();
@@ -97,6 +103,7 @@ public partial class World : Node3D
 		foreach (var kvp in batches)
 		{
 			MultiMesh mm = multiMeshes[kvp.Key].Multimesh;
+			List<Placeholder> placeholders = tilePlaceholders[kvp.Key];
 			List<Transform3D> list = kvp.Value;
 
 			mm.InstanceCount = list.Count;
@@ -104,6 +111,16 @@ public partial class World : Node3D
 			for (int i = 0; i < list.Count; i++)
 			{
 				mm.SetInstanceTransform(i, list[i]);
+				if (placeholders.Count > 0)
+				{
+					Node3D robot;
+					foreach (Placeholder placeholder in placeholders)
+					{
+						robot = ResourceLoader.LoadRobotPrefab().Instantiate<Node3D>();
+						robot.Position = placeholder.pos + list[i].Origin;
+						AddChild(robot);
+					} 
+				}
 			}
 		}
 	}