How to render DistanceJoint

Question

I need to render a DistanceJoint, just a line connecting the 2 anchors, nothing fancy. I've seen something about a render method here but I coulen't figure out how to use it. I also don't mind using debug features. Thank you very much :)

Answer 1

Since you have tagged the question with Flame I'm guessing that you are using flame_forge2d?

The link that you provide is for pure forge2d web, but you should be able to do it in a similar fashion in flame_forge2d. I would try something like this in your Forge2DGame:

  final _bodyARenderPosition = Vector2.zero();
  final _bodyBRenderPosition = Vector2.zero();

  @override
  void render(Canvas c) {
    super.render(c);
    c.save();
    c.scale(camera.zoom);
    for (final joint in world.joints) {
      _bodyARenderPosition
        ..setFrom(joint.bodyA.position)
        ..y *= -1;
      _bodyBRenderPosition
        ..setFrom(joint.bodyB.position)
        ..y *= -1;
      c.drawLine(
        _bodyARenderPosition.toOffset(),
        _bodyBRenderPosition.toOffset(),
        debugPaint,
      );
    }
    c.restore();
  }