161 lines
3.9 KiB
Text
161 lines
3.9 KiB
Text
# A3XX Icing System
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# Jonathan Redpath (legoboyvdlp)
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# Copyright (c) 2022 Josh Davidson (Octal450)
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### Ice sensitive components definition.
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var Iceable = {
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new: func(node) {
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var m = { parents: [Iceable] };
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m.ice_inches = node.getNode("ice-inches", 1);
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m.sensitivity = node.getNode("sensitivity", 1);
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var deice_prop = node.getValue("salvage-control");
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m.deice = deice_prop ? props.globals.getNode(deice_prop, 1) : nil;
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var output_prop = node.getValue("output-property");
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m.output = output_prop ? props.globals.getNode(output_prop, 1): nil;
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return m;
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},
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update: func(factor, melt) {
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var icing = me.ice_inches.getValue();
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if(me.deice != nil and me.deice.getBoolValue()) {
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icing += melt;
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} else {
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icing += factor * me.sensitivity.getValue();
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}
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if(icing < 0) icing = 0;
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me.ice_inches.setValue(icing);
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if(me.output != nil) me.output.setValue(icing);
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},
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};
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### Icing parameters computation.
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# Environmental parameters of the icing model.
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var environment = {
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dewpoint: props.globals.getNode("/environment/dewpoint-degc"),
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temperature: props.globals.getNode("/environment/temperature-degc"),
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visibility: props.globals.getNode("/environment/effective-visibility-m"),
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visibLclWx: props.globals.getNode("/environment/visibility-m"),
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};
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var effects = {
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frost_inch: props.globals.getNode("/environment/aircraft-effects/frost-inch", 1),
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frost_norm: props.globals.getNode("/environment/aircraft-effects/frost-level"),
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};
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# Icing factor computation.
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var severity_factor_table = [
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-0.00000166,
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0.00000277,
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0.00000277,
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0.00000554,
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0.00001108,
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0.00002216,
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];
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var melt_factor = -0.00005;
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var temperature = 0;
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var spread = 0;
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var icingCond = 0;
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var severity = 0;
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var icing_factor = func() {
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temperature = environment.temperature.getValue();
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# Do we create ice?
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spread = temperature - environment.dewpoint.getValue();
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# freezing fog or low temp and below dp or in advanced wx cloud
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icingCond = ((spread < 0.1 or environment.visibility.getValue() < 1000 or environment.visibLclWx.getValue() < 5000)
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and temperature < 0);
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severity = 0;
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if (icingCond) {
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if (temperature >= -2) {
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severity = 1;
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} else if (temperature >= -12) {
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severity = 3;
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} else if (temperature >= -30) {
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severity = 5;
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} else if (temperature >= -40) {
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severity = 3;
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} else if (temperature >= -99) {
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severity = 1;
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}
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}
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return severity_factor_table[severity];
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}
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var speed = 0;
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var windowprobe = 0;
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var wingBtn = 0;
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var wingFault = 0;
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var PSI = 0;
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var wowl = 0;
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var wowr = 0;
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var PitotIcing = 0;
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var PitotFailed = 0;
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var lengBtn = 0;
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var lengFault = 0;
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var rengBtn = 0;
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var rengFault = 0;
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var WingHasBeenTurnedOff = 0;
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var GroundModeFinished = 0;
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var windowprb = 0;
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var stateL = 0;
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var stateR = 0;
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var iceables = [];
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var PitotIcing = [props.globals.getNode("/systems/pitot[0]/icing"),props.globals.getNode("/systems/pitot[1]/icing"),props.globals.getNode("/systems/pitot[2]/icing")];
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var PitotServicable = [props.globals.getNode("/systems/pitot[0]/serviceable", 1),props.globals.getNode("/systems/pitot[1]/serviceable", 1),props.globals.getNode("/systems/pitot[2]/serviceable"), 1];
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var icingInit = func {
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iceables = props.globals.getNode("/sim/model/icing", 1).getChildren("iceable");
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forindex(var i; iceables) {
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iceables[i] = Iceable.new(iceables[i]);
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}
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icing_timer.start();
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}
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var icingModel = func {
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var factor = icing_factor();
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foreach(iceable; iceables) {
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iceable.update(factor, melt_factor);
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}
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effects.frost_norm.setDoubleValue(effects.frost_inch.getValue() * 50);
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for (var i = 0; i <= 2; i = i + 1) {
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if (PitotIcing[i].getValue() > 0.03) {
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if (PitotServicable[i].getBoolValue()) {
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PitotServicable[i].setBoolValue(0);
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}
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} else {
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if (!PitotServicable[i].getBoolValue()) {
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PitotServicable[i].setBoolValue(1);
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}
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}
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}
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}
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###################
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# Update Function #
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###################
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var update_Icing = func {
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icingModel();
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}
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var icing_timer = maketimer(0.2, update_Icing);
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icing_timer.simulatedTime = 1;
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