From 52c0ddd7189597ceafe46219462b0b55a045f557 Mon Sep 17 00:00:00 2001
From: Alayan <alayan.feh@gmail.com>
Date: Fri, 12 Oct 2018 05:01:53 +0200
Subject: [PATCH] Add comment to clarify why the checkline check is done that
 way

---
 src/tracks/track_sector.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/tracks/track_sector.cpp b/src/tracks/track_sector.cpp
index 321b39559..9f80cf72e 100644
--- a/src/tracks/track_sector.cpp
+++ b/src/tracks/track_sector.cpp
@@ -101,6 +101,11 @@ void TrackSector::update(const Vec3 &xyz, bool ignore_vertical)
     {
         for (unsigned int i=0; i<checkline_requirements.size(); i++)
         {
+            // If a checkline is validated while off-road and rescue is then
+            // used ; checking for > is required to have the rescue position
+            // correctly updating until the checkline is crossed again.
+            // This requires an ordering of checklines such that
+            // if checkline N is validated, all checklines for n<N are too.
             if (m_last_triggered_checkline >= checkline_requirements[i])
             {
                 //has_prerequisite = true;