From 4a5961ca5b4d978a1749bbf1ca50d48562993624 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Mon, 10 Nov 2003 21:57:14 +0000
Subject: [PATCH] Allow the slip/skid ball to be overridden by an external
 source which calculates the position instead.

---
 src/Instrumentation/slip_skid_ball.cxx | 4 +++-
 src/Instrumentation/slip_skid_ball.hxx | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Instrumentation/slip_skid_ball.cxx b/src/Instrumentation/slip_skid_ball.cxx
index 3d2c8c475..9ebff9ba7 100644
--- a/src/Instrumentation/slip_skid_ball.cxx
+++ b/src/Instrumentation/slip_skid_ball.cxx
@@ -25,12 +25,14 @@ SlipSkidBall::init ()
     _z_accel_node = fgGetNode("/accelerations/pilot/z-accel-fps_sec", true);
     _out_node =
         fgGetNode("/instrumentation/slip-skid-ball/indicated-slip-skid", true);
+    _override_node =
+        fgGetNode("/instrumentation/slip-skid-ball/override", true);
 }
 
 void
 SlipSkidBall::update (double delta_time_sec)
 {
-    if (_serviceable_node->getBoolValue()) {
+    if (_serviceable_node->getBoolValue() && !_override_node->getBoolValue()) {
         double d = -_z_accel_node->getDoubleValue();
         if (d < 1.0)
             d = 1.0;
diff --git a/src/Instrumentation/slip_skid_ball.hxx b/src/Instrumentation/slip_skid_ball.hxx
index d8ed245c0..4c11c1df5 100644
--- a/src/Instrumentation/slip_skid_ball.hxx
+++ b/src/Instrumentation/slip_skid_ball.hxx
@@ -50,7 +50,8 @@ private:
     SGPropertyNode_ptr _y_accel_node;
     SGPropertyNode_ptr _z_accel_node;
     SGPropertyNode_ptr _out_node;
-    
+    SGPropertyNode_ptr _override_node;
+   
 };
 
 #endif // __INSTRUMENTS_SLIP_SKID_BALL_HXX