Moved random ground cover object management code (userdata.[ch]xx) over

[flightgear.git] / src / Instrumentation / altimeter.cxx

diff --git a/src/Instrumentation/altimeter.cxx b/src/Instrumentation/altimeter.cxx
index cf15be1f00b706dcccf1cba59391d7795fff7bd4..2a9578705ce73b54cc8a7aad7668278972e320fc 100644 (file)
--- a/src/Instrumentation/altimeter.cxx
+++ b/src/Instrumentation/altimeter.cxx
@@ -10,6 +10,10 @@
 #include <Main/util.hxx>
 
 
+// A higher number means more responsive
+#define RESPONSIVENESS 10.0
+
+
 // Altitude based on pressure difference from sea level.
 // pressure difference inHG, altitude ft
 static double altitude_data[][2] = {
@@ -67,27 +71,20 @@ Altimeter::init ()
         fgGetNode("/instrumentation/altimeter/indicated-altitude-ft", true);
 }
 
-void
-Altimeter::bind ()
-{
-}
-
-void
-Altimeter::unbind ()
-{
-}
-
 void
 Altimeter::update (double dt)
 {
     if (_serviceable_node->getBoolValue()) {
         double pressure = _pressure_node->getDoubleValue();
         double setting = _setting_node->getDoubleValue();
-        double altitude =
-            fgGetLowPass(_altitude_node->getDoubleValue(),
-                         _altitude_table->interpolate(setting - pressure),
-                         dt * 10);
-        _altitude_node->setDoubleValue(altitude);
+
+                                // Move towards the current setting
+        double last_altitude = _altitude_node->getDoubleValue();
+        double current_altitude =
+            _altitude_table->interpolate(setting - pressure);
+        _altitude_node->setDoubleValue(fgGetLowPass(last_altitude,
+                                                    current_altitude,
+                                                    dt * RESPONSIVENESS));
     }
 }