xrf.addEventListener('eval', (opts) => {
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts
  if( frag.rot && frag.q ){
    // apply roundrobin (if any)
    if( v.args ) v = v.args[ xrf.roundrobin(v,model) ]

    if( frag.q ){ // only operate on queried object(s)
      frag.q.getObjects().map( (o) => {
        o.rotation.set( 
          v.x * Math.PI / 180,
          v.y * Math.PI / 180,
          v.z * Math.PI / 180
        )
      })
    }
  }
})