AugmentedFaceNode.java

    private void updateRegionNodes() {
        if (augmentedFace == null) {
            return;
        }

        Pose centerPose = augmentedFace.getCenterPose();

        faceRegionNode.setWorldPosition(new Vector3(centerPose.tx(), centerPose.ty(), centerPose.tz()));

        // Rotate the bones by 180 degrees because the .fbx template's coordinate system is
        // inversed of Sceneform's coordinate system. This is so the .fbx works with other
        // 3D rendering engines as well
        //TODO: Remove the inversion here and on the .blend and .glb files
        Quaternion rotation = new Quaternion(centerPose.qx(), centerPose.qy(), centerPose.qz(), centerPose.qw());
        Quaternion inverse = new Quaternion(Vector3.up(), 180f);
        rotation = Quaternion.multiply(rotation, inverse);
        faceRegionNode.setWorldRotation(rotation);
    }