How to remove slight vibration of object

[Nishi05]

post again at issues.

I would like to eliminate the problem of objects vibrating minutely like in the video. (I don't know how to express this problem in words.)

RPReplay_Final1696383265.MP4

This problem will become smaller if i reduce the gravity and the restitution of the object, but if possible, i would like to solve this problem while keeping the values of gravity and the restitution.

this is my code

import 'dart:async';

import 'package:flame/extensions.dart';
import 'package:flame/game.dart';
import 'package:flutter/material.dart';

import 'package:flame/components.dart';
import 'package:flame/events.dart';
import 'package:flame_forge2d/flame_forge2d.dart';
import 'package:flutter/services.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setPreferredOrientations([
    DeviceOrientation.portraitUp,
    DeviceOrientation.portraitDown,
  ]);
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: GameWidget(game: BoxBodyExample()),
    );
  }
}

class BoxBodyExample extends Forge2DGame {
  BoxBodyExample()
      : super(
          world: DemoBodyWorld(),
          gravity: Vector2(0, 500),
        );
}

class DemoBodyWorld extends Forge2DWorld
    with TapCallbacks, HasGameReference<Forge2DGame> {
  @override
  Future<void> onLoad() async {
    super.onLoad();
    addAll(createBoundaries(game));
  }

  @override
  void onTapDown(TapDownEvent info) {
    super.onTapDown(info);
    final position = info.localPosition;
    add(FallingBox(position));
  }
}

List<Wall> createBoundaries(Forge2DGame game, {double? strokeWidth}) {
  final visibleRect = game.camera.visibleWorldRect;
  final topLeft = visibleRect.topLeft.toVector2();
  final topRight = visibleRect.topRight.toVector2();
  final bottomRight = visibleRect.bottomRight.toVector2();
  final bottomLeft = visibleRect.bottomLeft.toVector2();

  return [
    Wall(topLeft, topRight, strokeWidth: strokeWidth),
    Wall(topRight, bottomRight, strokeWidth: strokeWidth),
    Wall(bottomLeft, bottomRight, strokeWidth: strokeWidth),
    Wall(topLeft, bottomLeft, strokeWidth: strokeWidth),
  ];
}

class Wall extends BodyComponent {
  final Vector2 start;
  final Vector2 end;
  final double strokeWidth;

  Wall(this.start, this.end, {double? strokeWidth})
      : strokeWidth = strokeWidth ?? 1;

  @override
  Body createBody() {
    final shape = EdgeShape()..set(start, end);
    final fixtureDef = FixtureDef(shape, friction: 1);
    final bodyDef = BodyDef(
      userData: this,
      position: Vector2.zero(),
    );

    return world.createBody(bodyDef)..createFixture(fixtureDef);
  }
}

class FallingBox extends BodyComponent {
  final Vector2 _position;

  FallingBox(this._position);

  @override
  Body createBody() {
    final bodyDef = BodyDef(
      userData: this,
      type: BodyType.dynamic,
      position: _position,
      bullet: true,
      allowSleep: false,
    );
    final shape = PolygonShape()..setAsBoxXY(3, 3);

    final fixtureDef = FixtureDef(
      shape,
      userData: this,
      restitution: 0.6,
      friction: 1,
      density: 100,
    );

    return world.createBody(bodyDef)..createFixture(fixtureDef);
  }
}

flutter doctor

[✓] Flutter (Channel stable, 3.13.6, on macOS 13.6 22G120 darwin-arm64, locale en-JP)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2022.2)
[✓] VS Code (version 1.82.2)
[✓] Connected device (3 available)
[✓] Network resources

pubspec.yaml

name: flame_demo
description: A new Flutter project.

publish_to: "none"

version: 1.0.0+1

environment:
  sdk: ">=3.1.1 <4.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.2
  dashbook: ^0.1.12
  flame: ^1.9.1
  flame_forge2d: ^0.15.0+1
  flutter_sensors: ^1.0.1

dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_lints: ^2.0.0
  flame_lint: ^1.1.1

flutter:
  uses-material-design: true
  assets:
    - assets/images/

Any advice would be appreciated.

[spydon]

First set bullet to false and allowSleep to true, if that doesn't work, lower the restitution.

[Nishi05]

Thank you for your reply. I'm late.
Those settings worked. Thanks.
However, if possible, I'd like to change the direction of movement of the object depending on the tilt of the device,
so I'd like to avoid setting allowSleep to true.
Sorry for not writing about tilting the device,
but if set allowSleep to true, objects will not move even if tilt the device.

If there is no other simple way, I'll close this discussion as a mark as answer.

[spydon]

However, if possible, I'd like to change the direction of movement of the object depending on the tilt of the device,

You can wake up the bodies when you detect a tilt, I guess the tilt is changing the gravity?

[Nishi05]

Yes, gravity.
Ah, that makes sense.
it might be possible to put the object to sleep when the gravity value exceeds a threshold.
(Maybe necessary to devise ways to prevent objects to sleep in the air.)

Thanks a lot !
I'll try.