nl_tokens: Clamps horzontal field of view to viewer s limits .
pl_tokens: function constrainHfov ( hfov ) { // Keep field of view within bounds var minHfov = config . minHfov ; if ( config . type == 'multires' && renderer && config . multiResMinHfov ) { minHfov = Math . min ( minHfov , renderer . getCanvas ( ) . width / ( config . multiRes . cubeResolution / 90 * 0.9 ) ) ; } if ( minHfov > config . maxHfov ) { // Don't change view if bounds don't make sense console . log ( 'HFOV bounds do not make sense (minHfov > maxHfov).' ) return config . hfov ; } var newHfov = config . hfov ; if ( hfov < minHfov ) { newHfov = minHfov ; } else if ( hfov > config . maxHfov ) { newHfov = config . maxHfov ; } else { newHfov = hfov ; } // Optionally avoid showing background (empty space) on top or bottom by adapting newHfov if ( config . avoidShowingBackground && renderer ) { var canvas = renderer . getCanvas ( ) ; newHfov = Math . <mask> ( newHfov , Math . atan ( Math . tan ( ( config . maxPitch - config . minPitch ) / 360 * Math . PI ) / canvas . height * canvas . width ) * 360 / Math . PI ) ; } return newHfov ; }