Are additive animations supported in rive flutter ?

[FuadFox]

Are additive animations supported in rive flutter ?

Hello I have been trying to use the additve animation but its being skipped in my time machine, below you will find the context.

code:

import 'package:flutter/material.dart';
import 'package:rive/rive.dart';

class LoginScreen extends StatefulWidget {
  const LoginScreen({super.key});

  @override
  State<LoginScreen> createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  SMITrigger? fail;
  SMITrigger? success;


  void _onRiveInit(Artboard artboard) {
    final controller = StateMachineController.fromArtboard(
        artboard, 'login machine',
        onStateChange: _onStateChange);
    artboard.addController(controller!);

    fail = controller.findInput<bool>('fail') as SMITrigger;
    success = controller.findInput<bool>('success') as SMITrigger;
  }

  void _onStateChange(
    String stateMachineName,
    String stateName,
  ) =>
      setState(
        () => 'State Changed in $stateMachineName to $stateName',
      );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Simple Animation'),
      ),
      body: Column(children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            FloatingActionButton(onPressed: () => fail!.fire()),
            FloatingActionButton(onPressed: () => success!.fire(), backgroundColor: Colors.blue),
          ],
        ),
        SizedBox(
          height: 200,
          width: 200,
          child: Center(
            child: RiveAnimation.asset(
              'assets/daftar.riv',
              fit: BoxFit.fitHeight,
              stateMachines: ['login machine'],
              onInit: _onRiveInit,
            ),
          ),
        ),
      ]),
    );
  }
}

pubspec.yaml

environment:
  sdk: '>=3.0.0'

dependencies:
  flutter:
    sdk: flutter
  go_router: ^7.0.0
  hive: ^2.2.3
  hive_flutter: ^1.1.0
  flutter_secure_storage: ^8.0.0
  cupertino_icons: ^1.0.2
  http: ^0.13.6
  rive: ^0.11.3

dev_dependencies:
  flutter_test:
    sdk: flutter
  hive_generator: ^2.0.0
  build_runner: ^2.4.2

  flutter_lints: ^2.0.0
flutter:
  uses-material-design: true

  assets:
    - assets/

rive backup and riv files will be attached.

backup.zip rive_file.zip

please notice the last blend state where its additive its just being skipped in the flutter runtime

[HayesGordon]

Hi @FuadFox additive animations are supported, but it seems like you found a bug/inconsistency between the runtime and the editor. We'll take a look into this, thanks for opening the issue.

In the meantime, I noticed that if you add an additional timeline to the additive blend then it will work. Or alternatively for your animation it seems like you do not need a blend state at all if you're only using one timeline at 100. You could use a normal animation instead of the blend.

[HayesGordon]

Closing this as it should be resolved in the latest version. If not please feel free to reopen. Also note that a likely reason for the above issues was that the same State Machine Controller was added twice. In the widget constructor and manually using addController