godot/modules/gltf/editor/editor_scene_importer_fbx.cpp

/*************************************************************************/
/*  editor_scene_importer_fbx.cpp                                        */
/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#include "editor_scene_importer_fbx.h"

#ifdef TOOLS_ENABLED

#include "../gltf_document.h"
#include "../gltf_state.h"

#include "core/config/project_settings.h"
#include "editor/editor_settings.h"
#include "scene/main/node.h"
#include "scene/resources/animation.h"

uint32_t EditorSceneFormatImporterFBX::get_import_flags() const {
	return ImportFlags::IMPORT_SCENE | ImportFlags::IMPORT_ANIMATION;
}

void EditorSceneFormatImporterFBX::get_extensions(List<String> *r_extensions) const {
	r_extensions->push_back("fbx");
}

Node *EditorSceneFormatImporterFBX::import_scene(const String &p_path, uint32_t p_flags,
		const HashMap<StringName, Variant> &p_options, int p_bake_fps,
		List<String> *r_missing_deps, Error *r_err) {
	// Get global paths for source and sink.

	// Don't use `c_escape()` as it can generate broken paths. These paths will be
	// enclosed in double quotes by OS::execute(), so we only need to escape those.
	// `c_escape_multiline()` seems to do this (escapes `\` and `"` only).
	const String source_global = ProjectSettings::get_singleton()->globalize_path(p_path).c_escape_multiline();
	const String sink = ProjectSettings::get_singleton()->get_imported_files_path().path_join(
			vformat("%s-%s.glb", p_path.get_file().get_basename(), p_path.md5_text()));
	const String sink_global = ProjectSettings::get_singleton()->globalize_path(sink).c_escape_multiline();

	// Run fbx2gltf.

	String fbx2gltf_path = EDITOR_GET("filesystem/import/fbx/fbx2gltf_path");

	List<String> args;
	args.push_back("--pbr-metallic-roughness");
	args.push_back("--input");
	args.push_back(source_global);
	args.push_back("--output");
	args.push_back(sink_global);
	args.push_back("--binary");

	String standard_out;
	int ret;
	OS::get_singleton()->execute(fbx2gltf_path, args, &standard_out, &ret, true);
	print_verbose(fbx2gltf_path);
	print_verbose(standard_out);

	if (ret != 0) {
		if (r_err) {
			*r_err = ERR_SCRIPT_FAILED;
		}
		ERR_PRINT(vformat("FBX conversion to glTF failed with error: %d.", ret));
		return nullptr;
	}

	// Import the generated glTF.

	// Use GLTFDocument instead of glTF importer to keep image references.
	Ref<GLTFDocument> gltf;
	gltf.instantiate();
	Ref<GLTFState> state;
	state.instantiate();
	print_verbose(vformat("glTF path: %s", sink));
	Error err = gltf->append_from_file(sink, state, p_flags, p_bake_fps);
	if (err != OK) {
		if (r_err) {
			*r_err = FAILED;
		}
		return nullptr;
	}
	return gltf->generate_scene(state, p_bake_fps);
}

Variant EditorSceneFormatImporterFBX::get_option_visibility(const String &p_path, bool p_for_animation,
		const String &p_option, const HashMap<StringName, Variant> &p_options) {
	return true;
}

void EditorSceneFormatImporterFBX::get_import_options(const String &p_path,
		List<ResourceImporter::ImportOption> *r_options) {
}

#endif // TOOLS_ENABLED