From 01ab3b2385aa5c62653c662722dba2ecf27c1cc5 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Sat, 30 May 2020 16:27:42 +0100
Subject: [PATCH] New SGGeodesy::advance, taking degrees

---
 simgear/math/SGGeodesy.cxx | 7 +++++++
 simgear/math/SGGeodesy.hxx | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/simgear/math/SGGeodesy.cxx b/simgear/math/SGGeodesy.cxx
index 6fe5bcdf..6949a526 100644
--- a/simgear/math/SGGeodesy.cxx
+++ b/simgear/math/SGGeodesy.cxx
@@ -537,6 +537,13 @@ SGGeodesy::advanceRadM(const SGGeoc& geoc, double course, double distance,
   }
 }
 
+SGGeoc SGGeodesy::advanceDegM(const SGGeoc &geoc, double course,
+                              double distance) {
+  SGGeoc result;
+  advanceRadM(geoc, course * SG_DEGREES_TO_RADIANS, distance, result);
+  return result;
+}
+
 double
 SGGeodesy::courseRad(const SGGeoc& from, const SGGeoc& to)
 {
diff --git a/simgear/math/SGGeodesy.hxx b/simgear/math/SGGeodesy.hxx
index cce38199..6a74eadd 100644
--- a/simgear/math/SGGeodesy.hxx
+++ b/simgear/math/SGGeodesy.hxx
@@ -65,6 +65,9 @@ public:
   // Geocentric course/distance computation
   static void advanceRadM(const SGGeoc& geoc, double course, double distance,
                           SGGeoc& result);
+
+  static SGGeoc advanceDegM(const SGGeoc &geoc, double course, double distance);
+
   static double courseRad(const SGGeoc& from, const SGGeoc& to);
   static double distanceRad(const SGGeoc& from, const SGGeoc& to);
   static double distanceM(const SGGeoc& from, const SGGeoc& to);