From ca70febb5d2629bc9a25ad399c18c7c4fc228e01 Mon Sep 17 00:00:00 2001
From: Josh Davidson <joshdavidson2000@outlook.com>
Date: Wed, 28 Sep 2022 19:32:59 -0400
Subject: [PATCH] FMGC: Sync with itaf_core

---
 Nasal/FMGC/FMGC-b.nas    |  1 +
 Systems/fmgc-drivers.xml | 60 +++++++++++++++++-----------------------
 2 files changed, 27 insertions(+), 34 deletions(-)

diff --git a/Nasal/FMGC/FMGC-b.nas b/Nasal/FMGC/FMGC-b.nas
index 387763f8..c154673a 100644
--- a/Nasal/FMGC/FMGC-b.nas
+++ b/Nasal/FMGC/FMGC-b.nas
@@ -124,6 +124,7 @@ var Internal = {
 	fpa: props.globals.initNode("/it-autoflight/internal/fpa", 0, "DOUBLE"),
 	hdgErrorDeg: props.globals.initNode("/it-autoflight/internal/heading-error-deg", 0, "DOUBLE"),
 	hdgPredicted: props.globals.initNode("/it-autoflight/internal/heading-predicted", 0, "DOUBLE"),
+	hdgTrk: props.globals.initNode("/it-autoflight/internal/heading", 0, "DOUBLE"),
 	lnavAdvanceNm: props.globals.initNode("/it-autoflight/internal/lnav-advance-nm", 0, "DOUBLE"),
 	minVs: props.globals.initNode("/it-autoflight/internal/min-vs", -500, "INT"),
 	maxVs: props.globals.initNode("/it-autoflight/internal/max-vs", 500, "INT"),
diff --git a/Systems/fmgc-drivers.xml b/Systems/fmgc-drivers.xml
index 0c500ce7..9a5703d5 100644
--- a/Systems/fmgc-drivers.xml
+++ b/Systems/fmgc-drivers.xml
@@ -486,6 +486,23 @@
 		<output>/instrumentation/pfd/track-deg</output>
 	</filter>
 	
+	<filter>
+		<name>Heading/Track Deg</name>
+		<type>gain</type>
+		<gain>1.0</gain>
+		<input>
+			<condition>
+				<equals>
+					<property>/it-autoflight/input/trk</property>
+					<value>1</value>
+				</equals>
+			</condition>
+			<property>/it-autoflight/internal/track-deg</property>
+		</input>
+		<input>/it-autoflight/internal/heading-deg</input>
+		<output>/it-autoflight/internal/heading</output>
+	</filter>
+	
 	<filter>
 		<name>Drift Angle</name>
 		<type>gain</type>
@@ -497,10 +514,10 @@
 					<value>1</value>
 				</less-than>
 			</condition>
-			<property>/orientation/heading-magnetic-deg</property>
+			<property>/orientation/heading-deg</property>
 		</input>
-		<input>/orientation/track-magnetic-deg</input>
-		<reference>/orientation/heading-magnetic-deg</reference>
+		<input>/orientation/track-deg</input>
+		<reference>/orientation/heading-deg</reference>
 		<output>/it-autoflight/internal/drift-angle-deg</output>
 		<period>
 			<min>-180</min>
@@ -515,7 +532,7 @@
 			<expression>
 				<table>
 					<property>/fdm/jsbsim/velocities/vc-kts</property>
-					<entry><ind>140</ind><dep>50</dep></entry>
+					<entry><ind>140</ind><dep>40</dep></entry>
 					<entry><ind>360</ind><dep>20</dep></entry>
 				</table>
 			</expression>
@@ -532,39 +549,14 @@
 		<gain>1.0</gain>
 		<input>
 			<condition>
-				<and>
-					<equals>
-						<property>/it-autoflight/output/lat</property>
-						<value>0</value>
-					</equals>
-					<equals>
-						<property>/it-autoflight/input/trk</property>
-						<value>0</value>
-					</equals>
-				</and>
+				<equals>
+					<property>/it-autoflight/output/lat</property>
+					<value>0</value>
+				</equals>
 			</condition>
 			<property>/it-autoflight/input/hdg</property>
 			<offset>
-				<property>/it-autoflight/internal/heading-deg</property>
-				<scale>-1.0</scale>
-			</offset>
-		</input>
-		<input>
-			<condition>
-				<and>
-					<equals>
-						<property>/it-autoflight/output/lat</property>
-						<value>0</value>
-					</equals>
-					<equals>
-						<property>/it-autoflight/input/trk</property>
-						<value>1</value>
-					</equals>
-				</and>
-			</condition>
-			<property>/it-autoflight/input/hdg</property>
-			<offset>
-				<property>/it-autoflight/internal/track-deg</property>
+				<property>/it-autoflight/internal/heading</property>
 				<scale>-1.0</scale>
 			</offset>
 		</input>