Added sub asset data members

Changed some control flow in asset manager to accommodate for subassets
Read/Write meta files for assets with sub assets

SHADE_Engine/src/Assets/SHAsset.h

@@ -22,5 +22,10 @@ namespace SHADE
 		AssetID id;
 		AssetType type;
     AssetPath path;
+    bool isSubAsset;
+
+    std::vector<SHAsset*> subAssets;
+
+    AssetID parent;
 	};
 }

SHADE_Engine/src/Assets/SHAssetMacros.h

@@ -46,10 +46,11 @@ enum class AssetType : AssetTypeMeta
 	SHADER,
 	SHADER_BUILT_IN,
   TEXTURE,
-  MESH,
+  MODEL,
   SCENE,
   PREFAB,
   MATERIAL,
+  MESH,
 	MAX_COUNT
 };
 constexpr size_t TYPE_COUNT{ static_cast<size_t>(AssetType::MAX_COUNT) };
@@ -83,7 +84,7 @@ constexpr std::string_view SCENE_EXTENSION {".shade"};
 constexpr std::string_view PREFAB_EXTENSION {".shprefab"};
 constexpr std::string_view MATERIAL_EXTENSION {".shmat"};
 constexpr std::string_view TEXTURE_EXTENSION {".shtex"};
-constexpr std::string_view MESH_EXTENSION {".shmesh"};
+constexpr std::string_view MODEL_EXTENSION {".shmodel"};
 
 constexpr std::string_view EXTENSIONS[] = {
 	AUDIO_EXTENSION,
@@ -91,7 +92,7 @@ constexpr std::string_view EXTENSIONS[] = {
 	SHADER_BUILT_IN_EXTENSION,
 	MATERIAL_EXTENSION,
 	TEXTURE_EXTENSION,
-	MESH_EXTENSION,
+  MODEL_EXTENSION,
 	SCRIPT_EXTENSION,
 	SCENE_EXTENSION,
 	PREFAB_EXTENSION,

SHADE_Engine/src/Assets/SHAssetManager.cpp

@@ -16,7 +16,7 @@
 #include "SHAssetManager.h"
 #include "SHAssetMetaHandler.h"
 
-#include "Libraries/Loaders/SHMeshLoader.h"
+#include "Libraries/Loaders/SHModelLoader.h"
 #include "Libraries/Loaders/SHTextureLoader.h"
 #include "Libraries/Loaders/SHShaderSourceLoader.h"
 #include "Libraries/Loaders/SHTextBasedLoader.h"
@@ -178,7 +178,8 @@ namespace SHADE
       name,
       id,
       type,
-      newPath
+      newPath,
+      false
     };
 
     assetCollection.insert({
@@ -187,7 +188,8 @@ namespace SHADE
           name,
           id,
           type,
-          newPath
+          newPath,
+          false
           )
     });
 
@@ -324,25 +326,32 @@ namespace SHADE
 		return result;
 	}
 
-	AssetID SHAssetManager::CompileAsset(AssetPath const& path) noexcept
+	void SHAssetManager::CompileAsset(AssetPath const& path) noexcept
 	{
-		SHAsset newAsset
+    if (!std::filesystem::exists(path))
     {
-			.name = path.stem().string()
+      SHLOG_ERROR("Path provided does not point to a file: {}", path.string());
-		};
+      return;
-
+    }
+    AssetPath newPath;
 		auto const ext{ path.extension().string() };
 		if (ext == GLSL_EXTENSION.data())
 		{
-			newAsset.path = SHShaderSourceCompiler::LoadAndCompileShader(path).value();
+      newPath = SHShaderSourceCompiler::LoadAndCompileShader(path).value();
-			newAsset.id = GenerateAssetID(AssetType::SHADER_BUILT_IN);
+		}
-			newAsset.type = AssetType::SHADER_BUILT_IN;
+    else if (ext == GLTF_EXTENSION.data() || ext == FBX_EXTENSION.data())
+    {
+      std::string command = MODEL_COMPILER_EXE.data();
+      command += " " + path.string();
+      std::system(command.c_str());
+
+      std::string modelPath = path.string().substr(0, path.string().find_last_of('.'));
+      modelPath += MODEL_EXTENSION;
+      newPath = modelPath;
+
+      GenerateNewMeta(newPath);
     }
 
-    assetCollection.insert({ newAsset.id, newAsset });
-		SHAssetMetaHandler::WriteMetaData(newAsset);
-
-		return newAsset.id;
 	}
 
   FolderPointer SHAssetManager::GetRootFolder() noexcept
@@ -395,23 +404,15 @@ namespace SHADE
 
 		for (auto const& path : paths)
 		{
-			SHAsset newAsset
+      AssetPath newPath;
-			{
-				.name = path.stem().string()
-			};
-
 			auto const ext{ path.extension().string() };
 			if (ext == GLSL_EXTENSION.data())
 			{
-				newAsset.path = SHShaderSourceCompiler::LoadAndCompileShader(path).value();
+        newPath = SHShaderSourceCompiler::LoadAndCompileShader(path).value();
-				newAsset.id = GenerateAssetID(AssetType::SHADER_BUILT_IN);
-				newAsset.type = AssetType::SHADER_BUILT_IN;
 			}
 			else if (ext == DDS_EXTENSION.data())
 			{
-				newAsset.path = SHTextureCompiler::CompileTextureAsset(path).value();
+				newPath = SHTextureCompiler::CompileTextureAsset(path).value();
-				newAsset.id = GenerateAssetID(AssetType::TEXTURE);
-				newAsset.type = AssetType::TEXTURE;
 			}
 			else if (ext == GLTF_EXTENSION.data() || ext == FBX_EXTENSION.data())
 			{
@@ -419,15 +420,12 @@ namespace SHADE
         command += " " + path.string();
         std::system(command.c_str());
 
-        std::string newPath = path.string().substr(0, path.string().find_last_of('.'));
+        std::string modelPath = path.string().substr(0, path.string().find_last_of('.'));
-        newPath += MESH_EXTENSION;
+        modelPath += MODEL_EXTENSION;
-        newAsset.path = newPath;
+        newPath = modelPath;
-        newAsset.id = GenerateAssetID(AssetType::MESH);
-        newAsset.type = AssetType::MESH;
 			}
 
-      assetCollection.insert({ newAsset.id, newAsset });
+      GenerateNewMeta(newPath);
-			SHAssetMetaHandler::WriteMetaData(newAsset);
 		}
 	}
 
@@ -442,10 +440,11 @@ namespace SHADE
 		loaders[static_cast<size_t>(AssetType::SHADER)] = dynamic_cast<SHAssetLoader*>(new SHShaderSourceLoader());
 		loaders[static_cast<size_t>(AssetType::SHADER_BUILT_IN)] = loaders[static_cast<size_t>(AssetType::SHADER)];
 		loaders[static_cast<size_t>(AssetType::TEXTURE)] = dynamic_cast<SHAssetLoader*>(new SHTextureLoader());
-		loaders[static_cast<size_t>(AssetType::MESH)] = dynamic_cast<SHAssetLoader*>(new SHMeshLoader());
+		loaders[static_cast<size_t>(AssetType::MODEL)] = dynamic_cast<SHAssetLoader*>(new SHModelLoader());
 		loaders[static_cast<size_t>(AssetType::SCENE)] = dynamic_cast<SHAssetLoader*>(new SHTextBasedLoader());
 		loaders[static_cast<size_t>(AssetType::PREFAB)] = loaders[static_cast<size_t>(AssetType::SCENE)];
     loaders[static_cast<size_t>(AssetType::MATERIAL)] = loaders[static_cast<size_t>(AssetType::SCENE)];
+    loaders[static_cast<size_t>(AssetType::MESH)] = nullptr;
 	}
 
 	/****************************************************************************
@@ -453,9 +452,9 @@ namespace SHADE
 	****************************************************************************/
 	void SHAssetManager::Load() noexcept
 	{
-		//CompileAll();
     BuildAssetCollection();
 		InitLoaders();
+    //CompileAll();
 		//LoadAllData();
 	}
 
@@ -473,8 +472,12 @@ namespace SHADE
 
 	SHAssetData* SHAssetManager::LoadData(SHAsset const& asset) noexcept
 	{
-		SHAssetData* data = loaders[static_cast<size_t>(asset.type)]->Load(asset.path);
+    if (asset.isSubAsset)
+    {
+      return LoadSubData(asset);
+    }
 
+    SHAssetData* data = loaders[static_cast<size_t>(asset.type)]->Load(asset.path);
 		if (data == nullptr)
 		{
 			SHLOG_ERROR("Unable to load asset into memory: {}\n", asset.path.string());
@@ -487,13 +490,120 @@ namespace SHADE
 		return data;
 	}
 
-  void SHAssetManager::LoadDataFromScratch(AssetPath path) noexcept
+  SHAssetData* SHAssetManager::LoadSubData(SHAsset const& asset) noexcept
   {
+    auto const& parent = assetCollection[asset.parent];
+    auto parentData = loaders[static_cast<size_t>(parent.type)]->Load(parent.path);
 
+    if (parentData == nullptr)
+    {
+      SHLOG_ERROR("Unable to load asset into memory: {}\n", parent.path.string());
+    }
+    else
+    {
+      assetData.emplace(parent.id, parentData);
+      if (parent.type == AssetType::MODEL)
+      {
+        auto parentModel = reinterpret_cast<SHModelAsset*>(parentData);
+        for (auto i {0}; i < parent.subAssets.size(); ++i)
+        {
+          assetData.emplace(
+            parent.subAssets[i]->id,
+            parentModel->subMeshes[i]
+          );
+        }
+      }
+
+      return assetData[asset.id];
+    }
+
+    return parentData;
+  }
+
+  void SHAssetManager::LoadNewData(AssetPath path) noexcept
+  {
+  }
+
+  void SHAssetManager::GenerateNewMeta(AssetPath path) noexcept
+  {
+    auto const ext = path.extension().string();
+    if (ext == SHADER_BUILT_IN_EXTENSION.data())
+    {
+      SHAsset newAsset{
+        path.stem().string(),
+        GenerateAssetID(AssetType::SHADER_BUILT_IN),
+        AssetType::SHADER_BUILT_IN,
+        path,
+        false
+      };
+
+      assetCollection.emplace(newAsset.id, newAsset);
+      SHAssetMetaHandler::WriteMetaData(newAsset);
+    }
+    else if (ext == TEXTURE_EXTENSION.data())
+    {
+      SHAsset newAsset{
+        path.stem().string(),
+        GenerateAssetID(AssetType::SHADER_BUILT_IN),
+        AssetType::SHADER_BUILT_IN,
+        path,
+        false
+      };
+
+      assetCollection.emplace(newAsset.id, newAsset);
+      SHAssetMetaHandler::WriteMetaData(newAsset);
+    }
+    else if (ext == MODEL_EXTENSION)
+    {
+      SHAsset newAsset{
+        path.stem().string(),
+        GenerateAssetID(AssetType::MODEL),
+        AssetType::MODEL,
+        path,
+        false
+      };
+
+      assetCollection.emplace(newAsset.id, newAsset);
+
+      SHModelAsset* const data = reinterpret_cast<SHModelAsset*>(LoadData(newAsset));
+      assetData.emplace(newAsset.id, data);
+      for(auto const& subMesh : data->subMeshes)
+      {
+        SHAsset subAsset{
+          .name = subMesh->header.name,
+          .id = GenerateAssetID(AssetType::MESH),
+          .type = AssetType::MESH,
+          .isSubAsset = true,
+          .parent = newAsset.id
+        };
+
+        assetCollection.emplace(subAsset.id, subAsset);
+        assetCollection[newAsset.id].subAssets.push_back(&assetCollection[subAsset.id]);
+
+        assetData.emplace(subAsset.id, subMesh);
+      }
+
+      SHAssetMetaHandler::WriteMetaData(assetCollection[newAsset.id]);
+    }
   }
 
   void SHAssetManager::BuildAssetCollection() noexcept
   {
     SHFileSystem::BuildDirectory(ASSET_ROOT.data(), folderRoot, assetCollection);
+
+    for (auto& asset : std::ranges::views::values(assetCollection))
+    {
+      if (!asset.subAssets.empty())
+      {
+        // Add subasset data into map, replace pointer and free heap memory
+        for (auto i{ 0 }; i < asset.subAssets.size(); ++i)
+        {
+          auto const id = asset.subAssets[i]->id;
+          assetCollection[id] = *asset.subAssets[i];
+          delete asset.subAssets[i];
+          asset.subAssets[i] = &assetCollection[id];
+        }
+      }
+    }
   }
 }

SHADE_Engine/src/Assets/SHAssetManager.h

@@ -87,7 +87,7 @@ namespace SHADE
 		static std::vector<SHAssetData const*> GetAllDataOfType(AssetType type) noexcept;
 		static std::vector<SHAsset> GetAllRecordOfType(AssetType type) noexcept;
 
-    static AssetID CompileAsset(AssetPath const& path) noexcept;
+    static void CompileAsset(AssetPath const& path) noexcept;
 
     static FolderPointer GetRootFolder() noexcept;
 		
@@ -96,7 +96,10 @@ namespace SHADE
     static void InitLoaders() noexcept;
 		static void LoadAllData() noexcept;
     static SHAssetData* LoadData(SHAsset const& asset) noexcept;
-    static void LoadDataFromScratch(AssetPath path) noexcept;
+    static SHAssetData* LoadSubData(SHAsset const& asset) noexcept;
+    static void LoadNewData(AssetPath path) noexcept;
+    static void GenerateNewMeta(AssetPath path) noexcept;
+
 		inline static void BuildAssetCollection() noexcept;
 
 		static bool IsRecognised(char const*) noexcept;

SHADE_Engine/src/Assets/SHAssetMetaHandler.cpp

@@ -9,7 +9,6 @@
  ******************************************************************************/
 #include "SHpch.h"
 #include "SHAssetMetaHandler.h"
-#include <fstream>
 #include <sstream>
 
 namespace SHADE
@@ -21,11 +20,15 @@ namespace SHADE
 	 * \brief   Helper function to retrieve field value from meta data file
 	 *					for processing
 	****************************************************************************/
-	void GetFieldValue(std::ifstream& file, std::string& line) noexcept
+	bool GetFieldValue(std::ifstream& file, std::string& line) noexcept
 	{
 		line = "";
-		std::getline(file, line);
+    if (std::getline(file, line))
+    {
       line = line.substr(line.find_last_of(':') + 2, line.length());
+      return true;
+    }
+    return false;
 	}
 
 	/****************************************************************************
@@ -66,7 +69,8 @@ namespace SHADE
 		std::ifstream metaFile{ path.string(), std::ios_base::in };
 		if (!metaFile.is_open())
 		{
-			// Error unable to open
+      SHLOG_ERROR("Unable to open meta file: {}", path.string());
+      return {};
 		}
 
 		std::string line;
@@ -93,6 +97,43 @@ namespace SHADE
 		typeStream >> type;
 		meta.type = static_cast<AssetType>(type);
     
+    meta.isSubAsset = false;
+
+    // Burn Line
+    if (std::getline(metaFile, line))
+    {
+      // Name Line
+      while(GetFieldValue(metaFile, line))
+      {
+        auto subAsset = new SHAsset();
+
+        // Get resource name
+        std::stringstream nameStream{ line };
+        AssetName name;
+        nameStream >> name;
+        subAsset->name = name;
+
+        // Get resource id
+        GetFieldValue(metaFile, line);
+        std::stringstream idStream{ line };
+        AssetID id;
+        idStream >> id;
+        subAsset->id = id;
+
+        // Get resource type
+        GetFieldValue(metaFile, line);
+        std::stringstream typeStream{ line };
+        AssetTypeMeta type;
+        typeStream >> type;
+        subAsset->type = static_cast<AssetType>(type);
+
+        subAsset->isSubAsset = true;
+        subAsset->parent = meta.id;
+
+        meta.subAssets.push_back(subAsset);
+      }
+    }
+
 		metaFile.close();
 
 		meta.path = path.parent_path().string() + "/" + path.stem().string();
@@ -108,6 +149,12 @@ namespace SHADE
 	****************************************************************************/
 	void SHAssetMetaHandler::WriteMetaData(SHAsset const& meta) noexcept
 	{
+    if (meta.isSubAsset)
+    {
+      SHLOG_WARNING("Cannot write subasset meta: {}", meta.name);
+      return;
+    }
+
 		//TODO: Write into binary eventually
 		std::string path{ meta.path.string() };
 		path.append(META_EXTENSION);
@@ -124,7 +171,23 @@ namespace SHADE
 		metaFile << "ID: " << meta.id << "\n";
 		metaFile << "Type: " << static_cast<AssetTypeMeta>(meta.type) << std::endl;
 
+    if (!meta.subAssets.empty())
+    {
+      metaFile << "Sub Assets:\n";
+
+      for (auto const& subAsset : meta.subAssets)
+      {
+        WriteSubAssetMeta(metaFile, *subAsset);
+      }
+    }
+
 		metaFile.close();
 	}
 
+  void SHAssetMetaHandler::WriteSubAssetMeta(std::ofstream& metaFile, SHAsset const& subAsset) noexcept
+  {
+    metaFile << "Name: " << subAsset.name << "\n";
+    metaFile << "ID: " << subAsset.id << "\n";
+    metaFile << "Type: " << static_cast<AssetTypeMeta>(subAsset.type) << std::endl;
+  }
 }

SHADE_Engine/src/Assets/SHAssetMetaHandler.h

@@ -12,6 +12,7 @@
 
 #include "SHAssetMacros.h"
 #include "SHAsset.h"
+#include <fstream>
 
 namespace SHADE
 {
@@ -45,6 +46,8 @@ namespace SHADE
 		 * \brief   Writes meta data into text file
 		****************************************************************************/
 		static void WriteMetaData(SHAsset const&) noexcept;
+
+    static void WriteSubAssetMeta(std::ofstream&, SHAsset const&) noexcept;
 	};
 }