android - 在屏幕中心的 AR 中创建锚点，并相对于相机将其移动近或远，就像 magicplan 一样

Question

我想创建一个与magicplan 相同的应用程序，并想绘制与magicplan 相同的连续绿色垂直管道，该管道会随着相机的移动而远近。

我已经尝试过下面的代码，但它将节点保持在屏幕的中心。请帮助我如何实现这一目标。

                Ray ray = arFragment.getArSceneView().getScene().getCamera().screenPointToRay(arFragment.getArSceneView().getWidth() / 2, arFragment.getArSceneView().getHeight() / 2);
                Vector3 localpos = ray.getPoint(1f);
                Quaternion localRotation = arFragment.getArSceneView().getScene().getCamera().getLocalRotation();
                Vector3 localScale = new Vector3(0.3f,0.3f,0.3f);
                Frame frame = arFragment.getArSceneView().getArFrame();
                Vector3 pos;
                pos = Vector3.add(ray.getOrigin(), ray.getDirection());

                Pose pose = Pose.makeTranslation(pos.x, pos.y, pos.z);

                anchor = arFragment.getArSceneView().getSession().createAnchor(pose);
                anchorNode = new AnchorNode(anchor);
                anchorNode.setParent(arFragment.getArSceneView().getScene());
                TransformationSystem transformationSystem = arFragment.getTransformationSystem();
                node = new TransformableNode(transformationSystem);
                node.setRenderable(cylinderRenderable2);
                node.setParent(anchorNode);
                node.setLocalPosition(localpos);
                node.setLocalRotation(localRotation);
                node.setLocalScale(localScale);
                node.select();