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A320-family/Nasal/FMGC/flightplan-delegates.nas

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# SPDX-License-Identifier: GPL-2.0-or-later
#
# NOTE! This copyright does *not* cover user models that use these Nasal
# services by normal function calls - this is merely considered normal use
# of the code, and does *not* fall under the heading of "derived work."
#
# Copyright (C) 2012-202 by James Turner
# route_manager.nas - FlightPlan delegate(s) corresponding to the built-
# in route-manager dialog and GPS. Intended to provide a sensible default behaviour,
# but can be disabled by an aircraft-specific FMS / GPS system.
# This delegate corresponds to functionality of the built-in route-manager dialog.
# if you disable it, the built-in route-manager dialog may not work as expected.
# Especially, this dialog is responsible for building departure, approach and
# arrival waypoints corresponding to the requested SID/STAR/approach,
# and replacing them when the inputs change (eg, user seelcted a different
# destination or STAR while enroute)
#
# You can disable the default GPS behaviour *without* touching this delegate : they are
# kept seperate since this first one is less likely to need changes
var GPSPath = "/instrumentation/gps";
# this delegate corresponds to the default behaviour of the built-in GPS.
# depending on the real GPS/FMS you are modelling, you probably need to
# replace this with your own.
#
# To do that, just set /autopilot/route-manager/disable-fms to true, which
# will block creation of this delegate.
#
# Of course you are then responsible for many basic FMS functions, such as
# route sequencing and activation
#
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var A320GPSDelegate = {
new: func(fp) {
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var m = { parents: [A320GPSDelegate], flightplan:fp, landingCheck:nil };
logprint(LOG_INFO, 'creating A320 GPS FPDelegate');
# tell the GPS C++ code we will do sequencing ourselves, so it can disable
# its legacy logic for this
setprop(GPSPath ~ '/config/delegate-sequencing', 1);
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# disable turn anticipation
setprop(GPSPath ~ '/config/enable-fly-by', 0);
# flyOver maximum distance
setprop(GPSPath ~ '/config/over-flight-arm-distance', 5);
fp.followLegTrackToFix = 1;
fp.aircraftCategory = 'C';
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m._modeProp = props.globals.getNode(GPSPath ~ '/mode');
return m;
},
_landingCheckTimeout: func
{
if (pts.Gear.wow[0].getValue() and pts.Velocities.groundspeed.getValue() < 25) {
logprint(LOG_INFO, 'GPS saw speed < 25kts on destination runway, end of route.');
me.landingCheck.stop();
# record touch-down time?
me.flightplan.finish();
}
},
_captureCurrentCourse: func
{
setprop(GPSPath ~ "/selected-course-deg", getprop(GPSPath ~ "/desired-course-deg"));
},
_selectOBSMode: func
{
setprop(GPSPath ~ "/command", "obs");
},
waypointsChanged: func
{
},
activated: func
{
if (!me.flightplan.active)
return;
logprint(LOG_INFO,'flightplan activated, default GPS to LEG mode');
setprop(GPSPath ~ "/command", "leg");
},
deactivated: func
{
if (me._modeProp.getValue() == 'leg') {
logprint(LOG_INFO, 'flightplan deactivated, default GPS to OBS mode');
me._captureCurrentCourse();
me._selectOBSMode();
}
},
endOfFlightPlan: func
{
if (me._modeProp.getValue() == 'leg') {
logprint(LOG_INFO, 'end of flight-plan, switching GPS to OBS mode');
me._captureCurrentCourse();
me._selectOBSMode();
}
},
cleared: func
{
if (!me.flightplan.active)
return;
if (me._modeProp.getValue() == 'leg') {
logprint(LOG_INFO, 'flight-plan cleared, switching GPS to OBS mode');
me._captureCurrentCourse();
me._selectOBSMode();
}
},
sequence: func
{
if (!me.flightplan.active)
return;
if (me._modeProp.getValue() == 'leg') {
if (me.flightplan.nextWP().wp_type == 'discontinuity') {
logprint(LOG_INFO, "default GPS sequencing DISCONTINUITY in flightplan, switching to HDG");
# set HDG mode
} else {
logprint(LOG_INFO, "default GPS sequencing to next WP");
me.flightplan.current = me.flightplan.current + 1;
}
} else {
# OBS, do nothing
}
},
currentWaypointChanged: func
{
if (!me.flightplan.active)
return;
if (me.landingCheck != nil) {
me.landingCheck.stop();
me.landingCheck = nil; # delete timer
}
var active = me.flightplan.currentWP();
if (active == nil) return;
var activeRunway = active.runway();
# this check is needed to avoid problems with circular routes; when
# activating the FP we end up here, and without this check, immediately
# detect that we've 'landed' and finish the FP again.
if (!pts.Gear.wow[0].getValue() and
(activeRunway != nil) and (me.flightplan.destination_runway != nil) and
(activeRunway.id == me.flightplan.destination_runway.id))
{
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me.landingCheck = maketimer(2.0, me, A320GPSDelegate._landingCheckTimeout);
me.landingCheck.start();
}
}
};
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registerFlightPlanDelegate(A320GPSDelegate.new);