my $uframe_tilted = undef;
my %member_indexen;
@member_index{ qw/ x y z Rx Ry Rz / } = ( 3 .. 8 );
if( $input_line =~ /UFRAME/ ) {
  MEMBERS:
  for my $member ( qw/ x y z Rx Ry Rz / ) {
    $UFRAME{$member}->[ $line_array[1] ] =
      sprintf( "%.3f", $line_array[ $member_index{ $member } ] )

    if( $UFRAME{ $member }->[ $line_array[1] ] != 0 ) {
      $uframe_tilted = 1;
      last MEMBERS;
    }
  }
}

##</code><code>##

sub _is_frame_tilted {
  my( $member, $value ) = @_;
  if( $member eq 'Rz' ) {
    return $value == 0;
  } else {
    return $value != 0;
  }
}