flightgear/scripts/perl/examples/flyplan.pl
2022-10-20 20:29:11 +08:00

92 lines
2.4 KiB
Perl
Executable File

#!/usr/bin/perl
#
# Written by Curtis L. Olson, started January 2003
#
# This file is in the Public Domain and comes with no warranty.
#
# $Id$
# ----------------------------------------------------------------------------
use strict;
require "telnet.pl";
my( $server ) = "localhost";
my( $port ) = 5401;
my( $timeout ) = 10;
my( %Route );
$Route{0} = "OAK:116.80:020";
$Route{1} = "OAK:116.80:019:27";
$Route{2} = "SAC:115.20:020";
$Route{3} = "SAC:115.20:080:43";
$Route{4} = "ECA:116.0:209";
my( $i );
foreach $i ( keys(%Route) ) {
&fly_to( $Route{$i} );
}
sub fly_to() {
my( $waypoint ) = shift;
# decode waypoint
my( $id, $freq, $radial, $dist ) = split( /:/, $waypoint );
print "Next way point is $id - $freq\n";
print " Target radial is $radial\n";
if ( $dist ne "" ) {
print " Flying outbound for $dist nm\n";
} else {
print " Flying inbound to station\n";
}
# tune radio and set autopilot
my( $fgfs );
if ( !( $fgfs = &connect($server, $port, $timeout) ) ) {
print "Error: can't open socket\n";
return;
}
&send( $fgfs, "data" ); # switch to raw data mode
set_prop( $fgfs, "/radios/nav[0]/frequencies/selected-mhz", $freq );
set_prop( $fgfs, "/radios/nav[0]/radials/selected-deg", $radial );
set_prop( $fgfs, "/radios/dme/switch-position", "1" );
set_prop( $fgfs, "/autopilot/locks/nav", "true" );
# monitor progress until goal is achieved
my( $done ) = 0;
my( $last_range ) = 9999.0;
while ( !$done ) {
my( $inrange ) = get_prop( $fgfs, "/radios/nav[0]/in-range" );
if ( $inrange eq "false" ) {
print "Warning, VOR not in range, we are lost!\n";
}
my( $cur_range ) = get_prop( $fgfs, "/radios/dme/distance-nm" );
print " range = $cur_range\n";
if ( $dist ne "" ) {
# a target dist is specified so assume we are flying outbound
if ( $cur_range > $dist ) {
$done = 1;
}
} else {
# no target dist is specified, assume we are flying
# inbound to the station
if ( $cur_range < 0.25 && $cur_range > 0.0 ) {
$done = 1;
} elsif ( $last_range < $cur_range ) {
$done = 1;
}
}
$last_range = $cur_range;
# loop once per second
sleep(1);
}
&send( $fgfs, "quit");
close $fgfs;
}