73 lines
2.5 KiB
Text
73 lines
2.5 KiB
Text
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# Copyright 2018 Stuart Buchanan
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# This file is part of FlightGear.
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#
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# FlightGear 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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# Fuel Publisher, providing information about fuel tank contents
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var GenericFuelPublisher =
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{
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new : func (frequency=1.0) {
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var obj = {
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parents : [
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GenericFuelPublisher,
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PeriodicPropertyPublisher.new(notifications.PFDEventNotification.FuelData, frequency)
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],
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};
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obj.deltaT = frequency;
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# Hack to handle most aircraft not having proper engine hours
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if (getprop("/engines/engine[0]/hours") == nil) setprop("/engines/engine[0]/hours", 157.0);
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# Assume pilot has correct fuel quantities entered at Start of Day
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var tanks = props.getNode("/consumables/fuel",1).getChildren("tank");
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foreach(var tank; tanks) {
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var actual = tank.getNode("level-gal_us", 1).getValue();
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var indicatedNode = tank.getNode("fg1000-indicated-level-gal_us", 1);
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if (indicatedNode.getValue() == nil) indicatedNode.setValue(actual);
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}
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return obj;
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},
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# Custom publish method as we package the values into an array of fuel tanks,
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# assuming that fuel is drawn evenly from both tanks.
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publish : func() {
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var tank_data = [];
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var tanks = props.getNode("/consumables/fuel",1).getChildren("tank");
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foreach(var tank; tanks) {
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var indicatedNode = tank.getNode("fg1000-indicated-level-gal_us", 1);
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var fuel = indicatedNode.getValue();
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if (fuel == nil) fuel = 0;
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var fuel_flow = getprop("/engines/engine[0]/fuel-flow-gph");
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if (fuel_flow == nil) fuel_flow = 0;
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fuel = fuel - fuel_flow*me.deltaT/3600.0/2;
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indicatedNode.setValue(fuel);
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append(tank_data, {"FuelUSGal": fuel});
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}
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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.FuelData,
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{ Id : "FuelData", Value : tank_data} );
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me._transmitter.NotifyAll(notification);
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},
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};
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