What do you mean? The way I see it, this code is producing a SimpleVector that holds an object's current rotation on all axis (and the object is currently only being rotated around y).
What do I do if I'm right about irrlicht's orientation? Is it still someObject3D.rotateX(sv.x), someObject3D.rotateY(sv.y), someObject3D.rotateZ(sv.z)?