From 244547eb4c43325b9e3e532ad7ccf1536ce0641d Mon Sep 17 00:00:00 2001
From: mfranz <mfranz>
Date: Fri, 12 May 2006 09:36:21 +0000
Subject: [PATCH] only lock AP automatically if above
 /autopilot/route-manager/min-lock-altitude-agl-ft The ufo sets this to a very
 low value, "serious" aircraft (which don't want this unrealistic automatism
 at all) set it to a very high value, and those that don't care ... don't need
 to care.

---
 src/Autopilot/route_mgr.cxx | 10 +++++++---
 src/Autopilot/route_mgr.hxx |  2 +-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/Autopilot/route_mgr.cxx b/src/Autopilot/route_mgr.cxx
index 0fe2d7f43..b95b39b8e 100644
--- a/src/Autopilot/route_mgr.cxx
+++ b/src/Autopilot/route_mgr.cxx
@@ -144,7 +144,7 @@ void FGRouteMgr::update( double dt ) {
             target_altitude_ft->setDoubleValue( target_alt * SG_METER_TO_FEET );
             altitude_set = true;
 
-            if ( !on_ground() )
+            if ( !near_ground() )
                 altitude_lock->setStringValue( "altitude-hold" );
         }
 
@@ -295,7 +295,7 @@ int FGRouteMgr::new_waypoint( const string& Tgt_Alt, int n ) {
         add_waypoint( *wp, n );
         delete wp;
 
-        if ( !on_ground() )
+        if ( !near_ground() )
             fgSetString( "/autopilot/locks/heading", "true-heading-hold" );
     }
     return type;
@@ -391,11 +391,15 @@ void FGRouteMgr::update_mirror() {
 }
 
 
-bool FGRouteMgr::on_ground() {
+bool FGRouteMgr::near_ground() {
     SGPropertyNode *gear = fgGetNode( "/gear/gear/wow", false );
     if ( !gear || gear->getType() == SGPropertyNode::NONE )
         return fgGetBool( "/sim/presets/onground", true );
 
+    if ( fgGetDouble("/position/altitude-agl-ft", 300.0)
+            < fgGetDouble("/autopilot/route-manager/min-lock-altitude-agl-ft") )
+        return true;
+
     return gear->getBoolValue();
 }
 
diff --git a/src/Autopilot/route_mgr.hxx b/src/Autopilot/route_mgr.hxx
index 69fa508af..22d373a3d 100644
--- a/src/Autopilot/route_mgr.hxx
+++ b/src/Autopilot/route_mgr.hxx
@@ -95,7 +95,7 @@ private:
 
     int make_waypoint( SGWayPoint **wp, string& target );
     void update_mirror();
-    bool on_ground();
+    bool near_ground();
 
 public: