nl_tokens: Event handler for device orientation API . Controls pointing .
pl_tokens: function orientationListener ( e ) { var q = computeQuaternion ( e . alpha , e . beta , e . gamma ) . toEulerAngles ( ) ; if ( typeof ( orientation ) == 'number' && orientation < 10 ) { // This kludge is necessary because iOS sometimes provides a few stale // device orientation events when the listener is removed and then // readded. Thus, we skip the first 10 events to prevent this from // causing problems. orientation += 1 ; } else if ( orientation === 10 ) { // Record starting yaw to prevent jumping orientationYawOffset = q [ 2 ] / Math . PI * 180 + config . yaw ; orientation = <mask> ; requestAnimationFrame ( animate ) ; } else { config . pitch = q [ 0 ] / Math . PI * 180 ; config . roll = - q [ 1 ] / Math . PI * 180 ; config . yaw = - q [ 2 ] / Math . PI * 180 + orientationYawOffset ; } }