A3XX: Improve FlyByWire Law Degrading

AircraftConfig/fbw.xml

@@ -50,6 +50,7 @@
 			<binding>
 				<command>nasal</command>
 				<script>
+				setprop("/it-fbw/degrade-law", 0);
 				setprop("/it-fbw/law", 0);
 				gui.popupTip("Fly By Wire switched to NORMAL law!");
 				</script>
@@ -65,6 +66,7 @@
 			<binding>
 				<command>nasal</command>
 				<script>
+				setprop("/it-fbw/degrade-law", 1);
 				setprop("/it-fbw/law", 1);
 				gui.popupTip("Fly By Wire switched to ALTERNATE law!");
 				</script>
@@ -80,6 +82,7 @@
 			<binding>
 				<command>nasal</command>
 				<script>
+				setprop("/it-fbw/degrade-law", 2);
 				setprop("/it-fbw/law", 2);
 				gui.popupTip("Fly By Wire switched to DIRECT law!");
 				</script>
@@ -95,6 +98,7 @@
 			<binding>
 				<command>nasal</command>
 				<script>
+				setprop("/it-fbw/degrade-law", 3);
 				setprop("/it-fbw/law", 3);
 				gui.popupTip("Fly By Wire switched to MECHANICAL BACKUP law!");
 				</script>

Nasal/it-fbw.nas

@@ -26,8 +26,10 @@ var fctlInit = func {
 	setprop("/systems/fctl/elac2", 0);
 	setprop("/systems/fctl/sec1", 0);
 	setprop("/systems/fctl/sec2", 0);
+	setprop("/systems/fctl/sec3", 0);
 	setprop("/systems/fctl/fac1", 0);
 	setprop("/systems/fctl/fac2", 0);
+	setprop("/it-fbw/degrade-law", 0);
 }
 
 setprop("/it-fbw/roll-back", 0);
@@ -38,7 +40,6 @@ setprop("/it-fbw/spd-hold", 0);
 ###################
 
 var update_loop = func {
-
 	var elac1_sw = getprop("/controls/fctl/elac1");
 	var elac2_sw = getprop("/controls/fctl/elac2");
 	var sec1_sw = getprop("/controls/fctl/sec1");
@@ -96,7 +97,46 @@ var update_loop = func {
 	} else {
 		setprop("/systems/fctl/fac2", 0);
 	}
-
+	
+	var elac1 = getprop("/systems/fctl/elac1");
+	var elac2 = getprop("/systems/fctl/elac2");
+	var sec1 = getprop("/systems/fctl/sec1");
+	var sec2 = getprop("/systems/fctl/sec2");
+	var sec3 = getprop("/systems/fctl/sec3");
+	var fac1 = getprop("/systems/fctl/fac1");
+	var fac2 = getprop("/systems/fctl/fac2");
+	var law = getprop("/it-fbw/law");
+	
+	# Degrade logic, all failures which degrade FBW need to go here. -JD
+	if (getprop("/gear/gear[1]/wow") == 0 and getprop("/gear/gear[2]/wow") == 0) {
+		if (!elac1 and !elac2) {
+			if (law == 0) {
+				setprop("/it-fbw/degrade-law", 1);
+			}
+		} else if (getprop("/systems/electrical/bus/ac-ess") >= 110 and getprop("/systems/hydraulic/blue-psi") >= 1500 and getprop("/systems/hydraulic/green-psi") < 1500 and getprop("/systems/hydraulic/yellow-psi") < 1500) {
+			if (law == 0 or law == 1) {
+				setprop("/it-fbw/degrade-law", 2);
+			}
+		} else if (getprop("/controls/gear/gear-down") == 1) {
+			if (law == 1) {
+				setprop("/it-fbw/degrade-law", 2);
+			}
+		} else if (getprop("/systems/electrical/bus/ac-ess") < 110 or (getprop("/systems/hydraulic/blue-psi") < 1500 and getprop("/systems/hydraulic/green-psi") < 1500 and getprop("/systems/hydraulic/yellow-psi") < 1500)) {
+			setprop("/it-fbw/degrade-law", 3);
+		}
+	}
+	
+	var law = getprop("/it-fbw/law");
+	
+	# Mech Backup can always return to direct, if it can.
+	if (law == 3 and getprop("/systems/electrical/bus/ac-ess") >= 110 and getprop("/systems/hydraulic/blue-psi") >= 1500) {
+		setprop("/it-fbw/degrade-law", 2);
+	}
+	
+}
+	
+var fbw_loop = func {
+	
 	var ail = getprop("/controls/flight/aileron");
 	
 	if (ail > 0.4 or ail < -0.4) {
@@ -115,24 +155,25 @@ var update_loop = func {
 	}
 
 	if (getprop("/it-fbw/override") == 0) {
-		if ((getprop("/systems/electrical/bus/ac-ess") >= 110) and (getprop("/systems/hydraulic/green-psi") >= 1500) and (getprop("/systems/hydraulic/yellow-psi") >= 1500)) {
+		var degrade = getprop("/it-fbw/degrade-law");
+		if (degrade == 0) {
 			if (getprop("/it-fbw/law") != 0) {
 				setprop("/it-fbw/law", 0);
 			}
-		} else if ((getprop("/systems/electrical/bus/ac-ess") >= 110) and (getprop("/systems/hydraulic/blue-psi") >= 1500)) {
+		} else if (degrade == 1) {
+			if (getprop("/it-fbw/law") != 1) {
+				setprop("/it-fbw/law", 1);
+			}
+		} else if (degrade == 2) {
 			if (getprop("/it-fbw/law") != 2) {
 				setprop("/it-fbw/law", 2);
 			}
-		} else {
+		} else if (degrade == 3) {
 			if (getprop("/it-fbw/law") != 3) {
 				setprop("/it-fbw/law", 3);
 			}
 		}
 	}
-	
-	if (getprop("/it-fbw/law") == 1 and getprop("/controls/gear/gear-down") == 1 and getprop("/it-fbw/override") == 0) {
-		setprop("/it-fbw/law", 2);
-	}
 }
 
 ###########################
@@ -141,11 +182,13 @@ var update_loop = func {
 
 setlistener("/sim/signals/fdm-initialized", func {
 	setprop("/it-fbw/override", 0);
-	setprop("/it-fbw/law", 3);
+	setprop("/it-fbw/law", 0);
 	updatet.start();
+	fbwt.start();
 });
 
 ##########
 # Timers #
 ##########
-var updatet = maketimer(0.05, update_loop);
+var updatet = maketimer(0.1, update_loop);
+var fbwt = maketimer(0.05, fbw_loop);