Use gltf2cpp (#73)

* Remove NodeData::Type; support multiple attachments

* Use gltf2cpp

- Remove detail/gltf.
- Cleanup src.zip.

Author: karnkaul

lib/ext/CMakeLists.txt

@@ -50,3 +50,6 @@ add_library(${target_prefix}::stb-image ALIAS stb-image)
 add_subdirectory(src/djson)
 
 add_subdirectory(src/fmt)
+
+set(GLTF2CPP_DYNARRAY_DEBUG_VIEW ON)
+add_subdirectory(src/gltf2cpp)

lib/ext/src.zip

@@ -20,7 +20,7 @@ target_include_directories(${PROJECT_NAME}
 target_link_libraries(${PROJECT_NAME}
   PUBLIC
   ${target_prefix}::vk
-  djson::djson
+  gltf2cpp::gltf2cpp
 
   PRIVATE
   ${target_prefix}::compile-options
@@ -47,9 +47,6 @@ target_sources(${PROJECT_NAME} PRIVATE
   include/${target_prefix}/scene/scene_resources.hpp
   include/${target_prefix}/scene/scene.hpp
 
-  src/detail/gltf.cpp
-  src/detail/gltf.hpp
-
   src/camera.cpp
   src/gltf_loader.cpp
   src/material.cpp

lib/scene/CMakeLists.txt

@@ -1,5 +1,6 @@
 #pragma once
 #include <facade/util/transform.hpp>
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -8,11 +9,6 @@ namespace facade {
 /// \brief Scene Node data: shared between Scene and gltf::* (internal)
 ///
 struct NodeData {
-	///
-	/// \brief Node type.
-	///
-	enum class Type { eNone, eMesh, eCamera };
-
 	///
 	/// \brief Name of the node.
 	///
@@ -30,8 +26,12 @@ struct NodeData {
 	///
 	std::size_t index{};
 	///
-	/// \brief Type of the node.
+	/// \brief Camera index.
+	///
+	std::optional<std::size_t> camera{};
+	///
+	/// \brief Mesh index.
 	///
-	Type type{};
+	std::optional<std::size_t> mesh{};
 };
 } // namespace facade