Added WFC and respective parts (Tile, World, Layer, WFC, ResourceLoader)

Scripts/Tile.cs

@@ -0,0 +1,73 @@
+using Godot;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+public partial class Tile
+{
+	public Dictionary<string, MeshInstance3D> tileMeshes;
+	public string collapsedMesh;
+	Random rand = new Random();
+	public Vector3 Position;
+	public Vector2I GridPosition;
+
+	public void SetMeshes(Dictionary<string, MeshInstance3D> tileMeshes)
+	{
+		this.tileMeshes = new Dictionary<string, MeshInstance3D>(tileMeshes);
+	}
+
+	public string Collapse(string tile)
+	{
+		if (collapsedMesh != null) return "";
+		if (tileMeshes.Keys.Count <= 0) return "ERR";
+		collapsedMesh = (tile.Length > 0) ? tile : ChooseWeighted();
+		tileMeshes.Clear();
+		return collapsedMesh;
+	}
+
+	private string ChooseWeighted()
+	{
+		float totalWeight = 0f;
+
+		foreach (string tile in tileMeshes.Keys)
+		{
+			totalWeight += WFC.weights[tile];
+		}
+
+		float r = (float)(rand.NextDouble() * totalWeight);
+
+		float cumulative = 0f;
+
+		foreach (string tile in tileMeshes.Keys)
+		{
+			cumulative += WFC.weights[tile];
+
+			if (r <= cumulative)
+				return tile;
+		}
+
+		return "junction";
+	}
+
+	public int Propagate(HashSet<string> possibleKeys)
+	{
+		int amountRemoved = 0;
+		if (collapsedMesh != null) return 0;
+		foreach (string key in tileMeshes.Keys.ToList())
+		{
+			if (!possibleKeys.Contains(key))
+			{
+				tileMeshes.Remove(key);
+				amountRemoved++;
+			}
+		}
+		if (tileMeshes.Count == 0) return int.MaxValue;
+		return amountRemoved;
+	}
+
+	public void Reset(Dictionary<string, MeshInstance3D> tileMeshes)
+	{
+		collapsedMesh = null;
+		SetMeshes(tileMeshes);
+	}
+}