89 lines
3.3 KiB
Text
89 lines
3.3 KiB
Text
# Copyright 2018 Stuart Buchanan
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# This file is part of FlightGear.
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#
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# Foobar is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# FlightGear is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with FlightGear. If not, see <http://www.gnu.org/licenses/>.
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#
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# FMS Driver using Emesary to publish data from the inbuilt FMS properties
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var GenericFMSPublisher =
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{
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new : func (frequency=0.5) {
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var obj = {
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parents : [
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GenericFMSPublisher,
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PeriodicPropertyPublisher.new(notifications.PFDEventNotification.FMSData, frequency)
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],
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};
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obj.addPropMap("FMSLegBearing", "/instrumentation/gps/wp/wp[1]/bearing-mag-deg");
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obj.addPropMap("FMSLegCourseError", "/instrumentation/gps/wp/wp[1]/course-error-nm");
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obj.addPropMap("FMSLegDesiredTrack", "/instrumentation/gps/indicated-track-magnetic-deg");
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obj.addPropMap("FMSLegTrackErrorAngle", "/instrumentation/gps/wp/wp[1]/course-deviation-deg");
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obj.addPropMap("FMSLegTrack", "/instrumentation/gps/indicated-track-magnetic-deg");
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obj.addPropMap("FMSGroundspeed", "/instrumentation/gps/indicated-ground-speed-kt");
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obj.addPropMap("FMSWayPointCourseError", "/instrumentation/gps/wp/wp[1]/course-error-nm");
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return obj;
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},
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# Custom publish method as we need to calculate some particular values manually.
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publish : func() {
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var gpsdata = {};
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foreach (var propmap; me._propmaps) {
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var name = propmap.getName();
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gpsdata[name] = propmap.getValue();
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}
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# A couple of calculated values used by the MFD Header display
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var total_fuel = getprop("/consumables/fuel/tank[0]/indicated-level-gal_us") or 0.0;
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total_fuel = total_fuel + (getprop("/consumables/fuel/tank[1]/indicated-level-gal_us") or 0.0);
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var fuel_flow = getprop("/engines/engine[0]/fuel-flow-gph") or 1.0;
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gpsdata["FuelOnBoard"] = total_fuel;
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gpsdata["EnduranceHrs"] = total_fuel / fuel_flow;
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var plan = flightplan();
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var dst = 0.0;
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if (plan.getPlanSize() > 0) {
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# Determine the distance to travel, based on
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# - current distance to the next WP,
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# - length of each subsequent leg.
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dst = getprop("/instrumentation/gps/wp/wp[1]/distance-nm") or 0.0;
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if (plan.indexOfWP(plan.currentWP()) < (plan.getPlanSize() -1)) {
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for(var i=plan.indexOfWP(plan.currentWP()) + 1; i < plan.getPlanSize(); i = i+1) {
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var leg = plan.getWP(i);
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if (leg != nil ) dst = dst + leg.leg_distance;
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}
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}
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}
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gpsdata["FMSDistance"] = dst;
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var spd = getprop("/instrumentation/gps/indicated-ground-speed-kt") or 1.0;
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var time_hrs = dst / spd;
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gpsdata["FMSEstimatedTimeEnroute"] = time_hrs;
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gpsdata["FMSFuelOverDestination"] = total_fuel - time_hrs * fuel_flow;
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var notification = notifications.PFDEventNotification.new(
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"MFD",
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1,
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notifications.PFDEventNotification.FMSData,
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gpsdata);
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me._transmitter.NotifyAll(notification);
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},
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};
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