Ported the obj parser.

include/assets/file_parsers/stl_loader.hpp

@@ -3,28 +3,65 @@
 #include <filesystem>
 #include <system_error>
 #include <string_view>
+#include <unordered_map>
 
 #include "assets/data_stores.hpp"
-#include "assets/data"
-#include "../data_stores"
-#include "assets/prefetch_lookup.hpp"
-#include "assets/prefetch_queue.hpp"
+#include "assets/data/mesh_data.hpp"
+#include "assets/data_stores.hpp"
+#include "assets/path_id_lookups.hpp"
+#include "util/vector_hash.hpp"
 
-struct stl_loader {
+namespace assets
+{
 
+struct stl_loader
+{
 	static constexpr auto name = std::string_view("stl");
+	using data_type = mesh_data;
+	using store_type = mesh_store;
+	using lookup_type = mesh_id_lookup;
 
-	[[nodiscard]] static std::error_code prefetch(
-		const file_dir_list& paths,
-		prefetch_queue& queue
+	[[nodiscard]] std::error_code prefetch(
+		path_id_lookups& lookups
 	);
 
-	[[nodiscard]] static std::error_code load(
-		// space stuff that has to persist
-		dynamic_mesh_buffer& buffer,
-		const file_dir_list& paths,
-		prefetch_lookup& id_lookup,
-		shader_source_store& store,
+	[[nodiscard]] std::error_code load(
+		path_id_lookups& lookups,
+		data_stores& stores,
 		bool pedantic = false
 	);
+
+protected:
+	class parser_context
+	{
+	public:
+		parser_context(
+			path_id_lookups& m_id_lookups,
+			data_stores& m_stores
+		);
+
+		void operator()(lookup_type::const_pointer entry) noexcept;
+
+	protected:
+		void reset();
+
+		z3d::vertex_index find_or_push_vertex(const component_indices& vertex_comp_indices);
+
+		[[nodiscard]] std::optional<texture_id> fetch_texture_id(
+			const std::filesystem::path& mtl_dir,
+			std::string_view filename,
+			std::string_view texture_type_name
+		);
+
+	private:
+		path_id_lookups* m_id_lookups;
+		data_stores* m_stores;
+		data_type m_mesh{};
+		std::unordered_map<mesh_vertex_components::position, z3d::vertex_index> m_vertex_index_lookup{};
+	};
+
+private:
+	std::vector<lookup_type::const_pointer> m_path_buffer;
 };
+
+}