GameplayCamera.cs

public partial class GameplayCamera : Camera2D {

    //        dialogueRunner.AddCommandHandlerd("teleport_camera", TeleportCamera);
     //  dialogueRunner.AddCommandHandler("release_camera", ReleaseCamera);
     //  dialogueRunner.AddCommandHandler("start_camera_tween",
            StartCameraTween);
    private bool _scripted = false; 
    public void TeleportCamera(string markName) {
        KillTweenIfActive();
        var mark = CameraMarkLookup.Find(markName);
        if (!IsInstanceValid(mark)) {
            Log.Err($"No camera mark called {markName} exists");
            return;
        }

        _scripted = true;
        Instance.Position = mark.GlobalPosition;
    }

    /// <summary>
    /// Gradually move the camera toward the specified CameraMark.
    /// </summary>
    /// <param name="markName">Which CameraMark to tween towards</param>
    /// <param name="duration">How long the tween should take</param>
    public void StartCameraTween(string markName, float duration) {
        KillTweenIfActive();
        var mark = CameraMarkLookup.Find(markName);
        if (!IsInstanceValid(mark)) {
            Log.Err($"No camera mark called {markName} exists");
            return;
        }

        _scripted = true;
        _tween = CreateTween();
        _tween.BindNode(this);
        _tween.TweenProperty(this, "global_position", mark.GlobalPosition, duration);
    }

    /// <summary>
    /// Make the camera follow the player again, no longer controlled by scripting.
    /// </summary>
    public void ReleaseCamera() {
        KillTweenIfActive();
        _scripted = false;
    }

    public override void _PhysicsProcess(double deltaTime) {
        if (!_initialized || _scripted) {
            return;
        }

        // auto adjust camera based on input / follow player 
    }

    private void KillTweenIfActive() {
        if (_tween == null) {
            return;
        }

        if (!IsInstanceValid(_tween)) {
            _tween = null;
            return;
        }

        _tween.Kill();
        _tween = null;
    }

}