worked on obj and mtl prefetching nad parsing

include/assets/data_loaders/obj_loader.hpp

@@ -6,18 +6,21 @@
 #include "assets/dynamic_data_loaders/dynamic_material_loader.hpp"
 #include "assets/dynamic_data_stores/dynamic_mesh_store.hpp"
 #include "assets/prefetch_lookup.hpp"
+#include <set>
 
 namespace obj_loader_error {
 
 enum class codes {
 	ok = 0,
-	obj_cannot_open_file,
-	obj_malformed_vertex,
-	obj_malformed_texture_coordinate,
-	obj_malformed_normal,
-	obj_malformed_face,
-	obj_face_index_out_of_range,
-	obj_unknown_line_begin
+	cannot_open_file,
+	malformed_vertex,
+	malformed_texture_coordinate,
+	malformed_normal,
+	malformed_face,
+	face_index_out_of_range,
+	unknown_line_begin,
+	use_material_without_material_library,
+	unknown_material_name
 };
 
 } // namespace obj_loader_error
@@ -32,11 +35,48 @@ struct obj_loader {
 	);
 
 	[[nodiscard]] static std::error_code load(
-		components::mesh_vertex::flags enabled_components,
 		dynamic_mesh_buffer& buffer,
 		const file_dir_list& paths,
 		prefetch_lookup& id_lookup,
 		dynamic_data_store& store,
 		bool pedantic = false
 	);
+
+protected:
+	using index_type = dynamic_mesh_buffer::index_type;
+	using vertex_type = std::array<index_type, 3>;
+
+	struct indexed_vertex_type
+	{
+		vertex_type vertex;
+		index_type buffer_index;
+
+		friend auto operator<=>(const indexed_vertex_type& a, const indexed_vertex_type& b) {
+			return a.vertex <=> b.vertex;
+		}
+
+		bool operator==(const indexed_vertex_type& other) const noexcept {
+			return other.vertex == vertex;
+		}
+	};
+
+	static void find_materials(
+		std::span<char> buffer,
+		std::filesystem::path& path_buffer,
+		const std::filesystem::path& base_directory,
+		std::ifstream& in,
+		ztu::string_list& material_filenames
+	);
+
+	[[nodiscard]] static std::error_code obj_loader::parse_file(
+		dynamic_mesh_buffer& read_buffer,
+		dynamic_mesh_buffer& mesh_buffer,
+		std::filesystem::path& path_buffer,
+		const std::filesystem::path& base_directory,
+		std::set<indexed_vertex_type>& vertex_ids,
+		std::ifstream& in,
+		prefetch_lookup& id_lookup,
+		dynamic_data_store& store,
+		bool pedantic
+	);
 };