From da3f9b92034892c9e106af88150d74f755d0deac Mon Sep 17 00:00:00 2001
From: Jarrod Doyle <thejarroddoyle@gmail.com>
Date: Mon, 5 Aug 2024 19:25:44 +0100
Subject: [PATCH] Load and apply textures

---
 project/code/Mission.cs | 39 ++++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/project/code/Mission.cs b/project/code/Mission.cs
index 8b694eb..78771e5 100644
--- a/project/code/Mission.cs
+++ b/project/code/Mission.cs
@@ -24,11 +24,11 @@ public partial class Mission : Node3D
 	public bool Dump = false;
 
 	DbFile _file;
-	List<Image> _textures; // TODO: Make these textures :)
+	List<ImageTexture> _textures;
 
 	public override void _Ready()
 	{
-		_textures = new List<Image>();
+		_textures = new List<ImageTexture>();
 
 		var missionSelector = GetNode<Control>("%MissionSelector") as MissionSelector;
 		missionSelector.LoadMission += (string path) =>
@@ -77,7 +77,7 @@ public partial class Mission : Node3D
 
 		_file = new(FileName);
 		var textureList = (TxList)_file.Chunks["TXLIST"];
-		// LoadTextures(textureList);
+		LoadTextures(textureList);
 		if (Dump) DumpTextureList(textureList);
 
 		var wr = (WorldRep)_file.Chunks["WREXT"];
@@ -106,13 +106,27 @@ public partial class Mission : Node3D
 		var surfaceArrays = BuildSurfaceArrays(cell, maxPolyIdx, out var packingRects);
 
 		Image lightmap = BuildLightmap(cell, packingRects, surfaceArrays);
-		var material = new StandardMaterial3D
-		{
-			AlbedoTexture = ImageTexture.CreateFromImage(lightmap),
-			TextureFilter = BaseMaterial3D.TextureFilterEnum.Nearest,
-		};
 
-		MeshInstance3D mesh = GenerateMesh(surfaceArrays, material);
+		// !Hack: This should be somewhere else?
+		var materials = new List<StandardMaterial3D>();
+		for (var i = 0; i < maxPolyIdx; i++)
+		{
+			var textureId = cell.RenderPolys[i].TextureId;
+			// !HACK: Sky textures :)
+			if (textureId >= _textures.Count)
+			{
+				textureId = 0;
+			}
+
+			var material = new StandardMaterial3D
+			{
+				AlbedoTexture = _textures[textureId],
+				TextureFilter = BaseMaterial3D.TextureFilterEnum.Nearest,
+			};
+			materials.Add(material);
+		}
+
+		MeshInstance3D mesh = GenerateMesh(surfaceArrays, materials);
 		OccluderInstance3D occluderInstance = GenerateOccluder(surfaceArrays);
 
 		var cellNode = new Node3D();
@@ -253,13 +267,13 @@ public partial class Mission : Node3D
 		return occluderInstance;
 	}
 
-	private static MeshInstance3D GenerateMesh(List<Godot.Collections.Array> surfaceArrays, StandardMaterial3D material)
+	private static MeshInstance3D GenerateMesh(List<Godot.Collections.Array> surfaceArrays, List<StandardMaterial3D> materials)
 	{
 		var arrMesh = new ArrayMesh();
 		for (var i = 0; i < surfaceArrays.Count; i++)
 		{
 			arrMesh.AddSurfaceFromArrays(Mesh.PrimitiveType.Triangles, surfaceArrays[i]);
-			arrMesh.SurfaceSetMaterial(i, material);
+			arrMesh.SurfaceSetMaterial(i, materials[i]);
 		}
 
 		var meshInstance = new MeshInstance3D
@@ -360,8 +374,7 @@ public partial class Mission : Node3D
 			}
 
 			if (Dump) GD.Print($"Loading texture: {path}");
-			// _textures.Add(ImageTexture.CreateFromImage(Image.LoadFromFile(path)));
-			_textures.Add(Image.LoadFromFile(path));
+			_textures.Add(ImageTexture.CreateFromImage(Image.LoadFromFile(path)));
 		}
 	}