fix: Fixed separate levels not reimporting when the configured fields in the project importer inspector was changed. This was fixed by introducing a new config file that gets generated by the project importer (.ldtkc)

Author: Cammin

Assets/LDtkUnity/Editor/Builders/LDtkBuilderProject.cs

@@ -2,6 +2,7 @@
 
 namespace LDtkUnity.Editor
 {
+    //todo: add support for runtime building startting from here. use the LDtkConfig object instead of the importers
     internal sealed class LDtkProjectBuilder
     {
         private readonly LDtkProjectImporter _project;

Assets/LDtkUnity/Editor/CustomEditor/Importer/LDtkConfigImporterEditor.cs

@@ -0,0 +1,19 @@
+using UnityEditor;
+using UnityEditor.AssetImporters;
+
+namespace LDtkUnity.Editor
+{
+    [CanEditMultipleObjects]
+    [CustomEditor(typeof(LDtkConfigImporter))]
+    internal sealed class LDtkConfigImporterEditor : ScriptedImporterEditor
+    {
+        public override void OnInspectorGUI()
+        {
+            const string msg = "This file is generated by the project importer.\n" +
+                               "It contains the configuration data from the project inspector.\n" +
+                               "It is only used for telling the levels to reimport when this is changed.";
+            EditorGUILayout.HelpBox(msg, MessageType.Info);
+            ApplyRevertGUI();
+        }
+    }
+}

Assets/LDtkUnity/Editor/CustomEditor/Importer/LDtkConfigImporterEditor.cs.meta

@@ -0,0 +1,25 @@
+using UnityEngine;
+
+#if UNITY_2020_2_OR_NEWER
+using UnityEditor.AssetImporters;
+#else
+using UnityEditor.Experimental.AssetImporters;
+#endif
+
+namespace LDtkUnity.Editor
+{
+    [ScriptedImporter(LDtkImporterConsts.CONFIG_VERSION, LDtkImporterConsts.CONFIG_EXT, LDtkImporterConsts.CONFIG_ORDER)]
+    internal sealed class LDtkConfigImporter : ScriptedImporter
+    {
+        public override void OnImportAsset(AssetImportContext ctx)
+        {
+            LDtkConfigData data = LDtkConfigData.ReadJson(assetPath);
+
+            LDtkConfig obj = ScriptableObject.CreateInstance<LDtkConfig>();
+            obj._data = data;
+            
+            ctx.AddObjectToAsset("main", obj, LDtkIconUtility.LoadListIcon());
+            ctx.SetMainObject(obj);
+        }
+    }
+}

Assets/LDtkUnity/Editor/ScriptedImporter/LDtkConfigImporter.cs

@@ -2,15 +2,18 @@
 {
     internal static class LDtkImporterConsts
     {
-        public const int PROJECT_VERSION = 31;
-        public const int LEVEL_VERSION = 15;
+        public const int PROJECT_VERSION = 32;
+        public const int LEVEL_VERSION = 16;
         public const int TILESET_VERSION = 8;
+        public const int CONFIG_VERSION = 0;
+        
         public const string MINIMUM_JSON_VERSION = "1.5.0";
         public const string EXPORT_APP_VERSION_REQUIRED = "1.5.3.1";
 
         public const string PROJECT_EXT = "ldtk";
         public const string LEVEL_EXT = "ldtkl";
         public const string TILESET_EXT = "ldtkt";
+        public const string CONFIG_EXT = "ldtkc";
 
         public const int DEFAULT_PPU = 16;
         private const int SCRIPTED_IMPORTER_ORDER = 1000;
@@ -21,6 +24,7 @@ internal static class LDtkImporterConsts
         //Import order https://forum.unity.com/threads/understanding-import-order-of-native-unity-asset-types.1187845/#post-9171509
         //Important to reimport before prefabs (1500)
         //99 is the secret parallel import value, but doesnt appear to work. maybe in a future update
+        public const int CONFIG_ORDER = 1093 - SCRIPTED_IMPORTER_ORDER;
         public const int TILESET_ORDER = 1094 - SCRIPTED_IMPORTER_ORDER;
         public const int PROJECT_ORDER = 1095 - SCRIPTED_IMPORTER_ORDER;
         public const int LEVEL_ORDER = 1099 - SCRIPTED_IMPORTER_ORDER; 

Assets/LDtkUnity/Editor/ScriptedImporter/LDtkConfigImporter.cs.meta

@@ -167,6 +167,10 @@ protected override void Import()
             TryGenerateEnums(json);
             LDtkProfiler.EndSample();
 
+            LDtkProfiler.BeginSample("CreateConfigurationFile");
+            GenerateConfigurationFile(json);
+            LDtkProfiler.EndSample();
+            
             LDtkProfiler.BeginSample("BufferEditorCache");
             BufferEditorCache();
             LDtkProfiler.EndSample();
@@ -238,10 +242,34 @@ private void TryCreateTableOfContents(LdtkJson json)
             }
 
             Toc = ScriptableObject.CreateInstance<LDtkTableOfContents>();
-            Toc.name += Path.GetFileNameWithoutExtension(assetPath) + "_Toc";
+            Toc.name += AssetName + "_Toc";
             Toc.Initialize(json);
             ImportContext.AddObjectToAsset("toc", Toc, LDtkIconUtility.LoadListIcon());
         }
+
+        private void GenerateConfigurationFile(LdtkJson json)
+        {
+            //only generate the file if separate levels is used
+            if (!json.ExternalLevels) return;
+
+            LDtkConfigData config = new LDtkConfigData()
+            {
+                PixelsPerUnit = _pixelsPerUnit,
+                CustomLevelPrefab = _customLevelPrefab,
+                IntGridValueColorsVisible = _intGridValueColorsVisible,
+                UseCompositeCollider = _useCompositeCollider,
+                GeometryType = _geometryType,
+                CreateBackgroundColor = _createBackgroundColor,
+                CreateLevelBoundsTrigger = _createLevelBoundsTrigger,
+                UseParallax = _useParallax,
+                IntGridValues = _intGridValues,
+                Entities = _entities,
+            };
+            string writePath = config.WriteJson(assetPath);
+            
+            //importing the asset if it doesn't exist due to the asset database not refreshing this automatically
+            AssetDatabase.ImportAsset(writePath);
+        }
 
         private void BufferEditorCache()
         {

Assets/LDtkUnity/Editor/ScriptedImporter/LDtkImporterConsts.cs

@@ -0,0 +1,12 @@
+using UnityEngine;
+
+namespace LDtkUnity.Editor
+{
+    /// <summary>
+    /// Purely a class to hold the LDtkConfigData as an import artifact
+    /// </summary>
+    internal sealed class LDtkConfig : ScriptableObject
+    {
+        public LDtkConfigData _data;
+    }
+}

Assets/LDtkUnity/Editor/ScriptedImporter/LDtkProjectImporter.cs

@@ -0,0 +1,54 @@
+using System;
+using System.IO;
+using System.Text;
+using UnityEngine;
+
+namespace LDtkUnity.Editor
+{
+    //todo: could be used to spawn levels in runtime potentially
+    [Serializable]
+    internal struct LDtkConfigData
+    {
+        public int PixelsPerUnit;
+        public GameObject CustomLevelPrefab;
+        public bool IntGridValueColorsVisible;
+        public bool UseCompositeCollider;
+        public CompositeCollider2D.GeometryType GeometryType;
+        public bool CreateBackgroundColor;
+        public bool CreateLevelBoundsTrigger;
+        public bool UseParallax;
+        public LDtkAssetIntGridValue[] IntGridValues;
+        public LDtkAssetEntity[] Entities;
+        
+        internal string WriteJson(string projectAssetPath)
+        {
+            string writePath = GetPath(projectAssetPath);
+            string json = JsonUtility.ToJson(this, true);
+            byte[] byteArray = Encoding.UTF8.GetBytes(json);
+            
+            LDtkPathUtility.TryCreateDirectoryForFile(writePath);
+            
+            File.WriteAllBytes(writePath, byteArray);
+            return writePath;
+        }
+        
+        internal static LDtkConfigData ReadJson(string assetPath)
+        {
+            if (!File.Exists(assetPath))
+            {
+                return new LDtkConfigData();
+            }
+
+            byte[] bytes = File.ReadAllBytes(assetPath);
+            string json = Encoding.UTF8.GetString(bytes);
+            return JsonUtility.FromJson<LDtkConfigData>(json);
+        }
+        
+        internal static string GetPath(string projectAssetPath)
+        {
+            string dir = Path.GetDirectoryName(projectAssetPath);
+            string importerAssetName = Path.GetFileNameWithoutExtension(projectAssetPath);
+            return Path.Combine(dir, importerAssetName, $"{importerAssetName}_Config.{LDtkImporterConsts.CONFIG_EXT}");
+        }
+    }
+}