X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FInstrumentation%2Fheading_indicator_fg.cxx;h=dfa099c51e6c4a9d1cb6a4224cf2244bd5364d17;hb=d051ba5cd20bed24bce73f540b1f4d37273d7b12;hp=23d49da7446b598ea00fba18260e15d94db0cea9;hpb=ec72392aa53cf61d95e9332e648ff2b0cafcc1f1;p=flightgear.git

diff --git a/src/Instrumentation/heading_indicator_fg.cxx b/src/Instrumentation/heading_indicator_fg.cxx
index 23d49da74..dfa099c51 100644
--- a/src/Instrumentation/heading_indicator_fg.cxx
+++ b/src/Instrumentation/heading_indicator_fg.cxx
@@ -5,6 +5,10 @@
 //
 // This file is in the Public Domain and comes with no warranty.
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
 #include <simgear/compiler.h>
 #include <iostream>
 #include <string>
@@ -14,6 +18,7 @@
 #include <Main/fg_props.hxx>
 #include <Main/util.hxx>			    
 
+using std::string;
 
 HeadingIndicatorFG::HeadingIndicatorFG ( SGPropertyNode *node )
     :
@@ -117,7 +122,7 @@ HeadingIndicatorFG::update (double dt)
 
                                 // Next, calculate the indicated heading,
                                 // introducing errors.
-    double factor = 0.1 / (spin * spin * spin * spin * spin * spin);
+    double factor = 100 * (spin * spin * spin * spin * spin * spin);
     double heading = _heading_in_node->getDoubleValue();
 
                                 // Now, we have to get the current
@@ -128,7 +133,7 @@ HeadingIndicatorFG::update (double dt)
     if ((heading - _last_heading_deg) < -180)
         _last_heading_deg -= 360;
 
-    heading = fgGetLowPass(_last_heading_deg, heading, dt / factor);
+    heading = fgGetLowPass(_last_heading_deg, heading, dt * factor);
     _last_heading_deg = heading;
 
 	heading += offset;