decouple assets from viewer to allow independent addition/removal/animation/etc

ios/src/SceneAssetLoader.hpp

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <filament/Scene.h>
+
+#include <gltfio/AssetLoader.h>
+#include <gltfio/FilamentAsset.h>
+#include <gltfio/ResourceLoader.h>
+
+#include "SceneResources.hpp"
+#include "SceneAsset.hpp"
+
+namespace polyvox {
+    using namespace filament;
+    using namespace filament::gltfio;
+    using namespace utils;
+
+    class SceneAssetLoader {
+        public:
+            SceneAssetLoader(
+                LoadResource loadResource, 
+                FreeResource freeResource, 
+                AssetLoader* assetLoader,
+                ResourceLoader* resourceLoader,
+                NameComponentManager* ncm,
+                Engine* engine,
+                Scene* scene);
+            SceneAsset* fromGltf(const char* uri, const char* relativeResourcePath);
+            SceneAsset* fromGlb(const char* uri);
+            void remove(SceneAsset* asset);
+
+        private:
+            LoadResource _loadResource;
+            FreeResource _freeResource;
+            AssetLoader* _assetLoader;
+            ResourceLoader* _resourceLoader;
+            NameComponentManager* _ncm;
+            Scene* _scene;
+            Engine* _engine;
+
+
+    };
+}