Добавление во Flutter 3D объекта через ARCore

import 'package:flutter/material.dart';
import 'package:arcore_flutter_plugin/arcore_flutter_plugin.dart';
import 'package:flutter/services.dart';

class MyARScreen extends StatefulWidget {
  const MyARScreen({Key? key}) : super(key: key);

  @override
  _MyARScreenState createState() => _MyARScreenState();
}

class _MyARScreenState extends State<MyARScreen> {
  late ArCoreController arCoreController;

  get vector => null;

  @override
  void dispose() {
    arCoreController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        appBarTheme: const AppBarTheme(
          color: Colors.grey,
        ),
      ),
      home: Scaffold(
        appBar: AppBar(
          title: const Text(
            'ОАО "ПФ "КМТ"',
            style: TextStyle(
              color: Colors.blue,
            ),
          ),
          centerTitle: true,
        ),
        body: Stack(
          children: [
            ArCoreView(
              onArCoreViewCreated: onArCoreViewCreated,
              enableTapRecognizer: true,
            ),
            Positioned(
              bottom: 20,
              left: 20,
              child: ElevatedButton(
                onPressed: () {
                  Navigator.pop(context);
                },
                style: ElevatedButton.styleFrom(
                  backgroundColor: Colors.black87,
                  minimumSize: Size(
                    MediaQuery.of(context).size.width,
                    60,
                  ),
                ),
                child: const Text(
                  'Вернуться назад',
                  style: TextStyle(
                    fontSize: 24,
                    fontWeight: FontWeight.bold,
                    fontStyle: FontStyle.italic,
                    fontFamily: 'Gothic',
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  void onArCoreViewCreated(ArCoreController arCoreController) async {
    this.arCoreController = arCoreController;
    final ArCoreMaterial material = ArCoreMaterial(
      color: Colors.white,
      textureBytes:
          (await rootBundle.load('assets/pngtexture.png')).buffer.asUint8List(),
    );

    final ArCoreReferenceNode node = ArCoreReferenceNode(
      objectUrl: 'assets/3Dmodel105доп.blend',
      scale: vector.Vector3(0.01, 0.01, 0.01),
      position: vector.Vector3(0, -0.5, -1.5),
      materials: [material],
    );

    arCoreController.addArCoreNode(node);
  }
}