Error when loading FBX file in EditorImportPlugin - how to load fbx files?

Question

I am trying to create an EditorPlugin/EditorImportPlugin to import fbx files. More specifically I want to extract the animations from the files and save them as a .res file. Normally I go over the advanced import tab select the animation and enable save to file: enter image description here

I have my EditorPlugin:

[Tool]
public partial class FbxAnimationImportPlugin : EditorPlugin
{
 private FbxAnimationImporter fbxAnimationImporter;
 public override void _EnterTree()
 {
 fbxAnimationImporter = new FbxAnimationImporter();
 AddImportPlugin(fbxAnimationImporter);
 }
 public override void _ExitTree()
 {
 RemoveImportPlugin(fbxAnimationImporter);
 fbxAnimationImporter = null;
 }
}

And the corresponding EditorImportPlugin:

[Tool]
public partial class FbxAnimationImporter : EditorImportPlugin
{
 public override string _GetImporterName()
 {
 return "fbx_animation_importer";
 }
 public override string _GetVisibleName()
 {
 return "FbxAnimationImporter";
 }
 public override string[] _GetRecognizedExtensions()
 {
 return ["fbx"];
 }
 public override string _GetSaveExtension()
 {
 return "res";
 }
 public override string _GetResourceType()
 {
 return "PackedScene";
 }
 public override Error _Import(string sourceFile, string savePath, Dictionary options, Array<string> platformVariants, Array<string> genFiles)
 {
 Resource scene = ResourceLoader.Load(sourceFile, "PackedScene");
 //Doing stuff with the scene and animations...
 return Error.Ok;
 }
}

However I get the error:

ERROR: Failed loading resource: res://assets/protof/[email protected]. Make sure resources have been imported by opening the project in the editor at least once.

How can I load the fbx file into a PackedScene so I can access the embedded AnimationPlayer?

Answer 1

I solved my Problem using an EditorScenePostImportPlugin

[Tool]
public partial class FbxAnimationImporter : EditorScenePostImportPlugin
{
 public override void _PostProcess(Node scene)
 {
 if ((bool)GetOptionValue("Save Animation to .res"))
 {
 AnimationPlayer animationPlayer = scene.GetNodeOrNull<AnimationPlayer>("AnimationPlayer");
 if (animationPlayer != null)
 {
 string sourcePath = (string)GetOptionValue("file_path_hack");
 foreach (string animationName in animationPlayer.GetAnimationList())
 {
 Animation animation = animationPlayer.GetAnimation(animationName);
 string saveFile = sourcePath + "_" + animationName + ".res";
 ResourceSaver.Save(animation, saveFile);
 }
 }
 else
 {
 GD.PushError("FBX/Scene has NO Animation(Player)");
 }
 }
 }
 public override void _GetImportOptions(string path)
 {
 AddImportOption("Save Animation to .res", false);
 AddImportOption("file_path_hack", path);
 }
 public override Variant _GetOptionVisibility(string path, bool forAnimation, string option)
 {
 if (option.Equals("file_path_hack")) return false;
 return base._GetOptionVisibility(path, forAnimation, option);
 }
 
}