rename relativeResourcePath to resourceUri

move resource loader from viewer to FilamentApp

thermion_dart/lib/src/filament/src/interface/filament_app.dart

@@ -5,7 +5,7 @@ class FilamentConfig<T, U> {
   final Backend backend;
   final T? renderCallback;
   final U? renderCallbackOwner;
-  Future<Uint8List> Function(String)? resourceLoader;
+  Future<Uint8List> Function(String)? loadResource;
   final U? platform;
   final U? sharedContext;
   final String? uberArchivePath;
@@ -14,7 +14,7 @@ class FilamentConfig<T, U> {
 
   FilamentConfig(
       {required this.backend,
-      required this.resourceLoader,
+      required this.loadResource,
       this.uberArchivePath,
       this.renderCallback,
       this.renderCallbackOwner,
@@ -44,6 +44,11 @@ abstract class FilamentApp<T> {
       required this.renderableManager,
       required this.ubershaderMaterialProvider});
 
+  ///
+  ///
+  ///
+  Future<Uint8List> loadResource(String uri);
+
   ///
   ///
   ///
@@ -277,7 +282,7 @@ abstract class FilamentApp<T> {
       int priority = 4,
       int layer = 0,
       bool loadResourcesAsync = false,
-      String? relativeResourcePath});
+      String? resourceUri});
 
   ///
   ///

thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart

@@ -27,12 +27,11 @@ class ThermionViewerFFI extends ThermionViewer {
   late final FFIView view;
   late final FFIScene scene;
   late final Pointer<TAnimationManager> animationManager;
-  late final Future<Uint8List> Function(String path) loadAssetFromUri;
 
   ///
   ///
   ///
-  ThermionViewerFFI({required this.loadAssetFromUri}) {
+  ThermionViewerFFI() {
     if (FilamentApp.instance == null) {
       throw Exception("FilamentApp has not been created");
     }
@@ -200,7 +199,7 @@ class ThermionViewerFFI extends ThermionViewer {
   ///
   @override
   Future setBackgroundImage(String path, {bool fillHeight = false}) async {
-    final imageData = await loadAssetFromUri(path);
+    final imageData = await FilamentApp.instance!.loadResource(path);
     _backgroundImage ??= await BackgroundImage.create(this, scene);
     await _backgroundImage!.setImage(imageData);
   }
@@ -233,7 +232,7 @@ class ThermionViewerFFI extends ThermionViewer {
   ///
   @override
   Future loadSkybox(String skyboxPath) async {
-    var data = await loadAssetFromUri(skyboxPath);
+    var data = await FilamentApp.instance!.loadResource(skyboxPath);
 
     skybox = await withPointerCallback<TSkybox>((cb) {
       Engine_buildSkyboxRenderThread(
@@ -255,7 +254,7 @@ class ThermionViewerFFI extends ThermionViewer {
     if (FILAMENT_WASM) {
       //stackPtr = stackSave();
     }
-    var data = await loadAssetFromUri(lightingPath);
+    var data = await FilamentApp.instance!.loadResource(lightingPath);
 
     indirectLight = await withPointerCallback<TIndirectLight>((cb) {
       Engine_buildIndirectLightRenderThread(
@@ -386,14 +385,24 @@ class ThermionViewerFFI extends ThermionViewer {
       {bool addToScene = true,
       int numInstances = 1,
       bool keepData = false,
-      String? relativeResourcePath}) async {
-    final data = await loadAssetFromUri(path);
+      String? resourceUri,
+      bool loadAsync = false}) async {
+    final data = await FilamentApp.instance!.loadResource(path);
+    if (resourceUri == null) {
+      var split = path.split("/");
+      resourceUri ??= split.take(split.length - 1).join("/");
+    }
+
+    if (!resourceUri.endsWith("/")) {
+      resourceUri = "${resourceUri}/";
+    }
 
     return loadGltfFromBuffer(data,
         addToScene: addToScene,
         numInstances: numInstances,
         keepData: keepData,
-        relativeResourcePath: relativeResourcePath);
+        resourceUri: resourceUri,
+        loadResourcesAsync: loadAsync);
   }
 
   ///
@@ -407,7 +416,7 @@ class ThermionViewerFFI extends ThermionViewer {
       int priority = 4,
       int layer = 0,
       bool loadResourcesAsync = false,
-      String? relativeResourcePath}) async {
+      String? resourceUri}) async {
     var asset = await FilamentApp.instance!.loadGltfFromBuffer(
         data, animationManager,
         numInstances: numInstances,
@@ -415,7 +424,7 @@ class ThermionViewerFFI extends ThermionViewer {
         priority: priority,
         layer: layer,
         loadResourcesAsync: loadResourcesAsync,
-        relativeResourcePath: relativeResourcePath) as FFIAsset;
+        resourceUri: resourceUri) as FFIAsset;
 
     _assets.add(asset);
     if (addToScene) {

thermion_dart/lib/src/viewer/src/thermion_viewer_base.dart

@@ -128,16 +128,37 @@ abstract class ThermionViewer {
   Future destroyLights();
 
   ///
-  /// Load the .glb asset at the given path, adding all entities to the scene.
-  /// Specify [numInstances] to create multiple instances (this is more efficient than dynamically instantating at a later time). You can then retrieve the created instances with [getInstances].
-  /// If you want to be able to call [createInstance] at a later time, you must pass true for [keepData].
-  /// If [keepData] is false, the source glTF data will be released and [createInstance] will throw an exception.
+  /// Load the glTF asset at the given path (.glb or .gltf)
   /// 
-  Future<ThermionAsset> loadGltf(String path,
+  /// If the file is a .gltf and [resourceUri] is not specified, 
+  /// all resources will be loaded relative to the URI of the file (so if 
+  /// [uri] is asset://assets/scene.gltf, the loader will attempt to load 
+  /// asset://assets/scene.bin, asset://assets/texture.png, and so on).
+  /// 
+  /// If [resourceUri] is specified, resources will be loaded relative to 
+  /// that path.
+  /// 
+  /// If [addToScene] is [true], all renderable entities (including lights)
+  /// in the asset will be added to the scene.
+  /// 
+  /// If you want to dynamically create instances of this asset after it is 
+  /// instantiated, pass [kee]
+
+  /// Alternatively, specifying [numInstances] will pre-allocate the specified 
+  /// number of instances. This is more efficient than dynamically instantating at a later time. 
+  /// You can then retrieve the created instances with [getInstances].
+  /// 
+  /// If [keepData] is false and [numInstances] is 1, 
+  /// the source glTF data will be released and [createInstance] 
+  /// will throw an exception.
+  ///
+  ///
+  Future<ThermionAsset> loadGltf(String uri,
       { bool addToScene = true,
         int numInstances = 1,
       bool keepData = false,
-      String? relativeResourcePath});
+      String? resourceUri,
+      bool loadAsync = false});
 
   ///
   /// Load the .glb asset from the specified buffer, adding all entities to the scene.
@@ -150,7 +171,7 @@ abstract class ThermionViewer {
   ///
   Future<ThermionAsset> loadGltfFromBuffer(Uint8List data,
       {
-        String? relativeResourcePath,
+        String? resourceUri,
         int numInstances = 1,
         bool keepData = false,
         int priority = 4,