Added fgFlightModelSetAltitude() to force the altitude to something

[flightgear.git] / FDM / flight.c

diff --git a/FDM/flight.c b/FDM/flight.c
index fcca61c2384711380af951dc5d7c39ecc6d5c02a..8263dbff091859fa45f2a452d3fc99456e6eba83 100644 (file)
--- a/FDM/flight.c
+++ b/FDM/flight.c
@@ -28,6 +28,8 @@
 #include <Debug/fg_debug.h>
 #include <Flight/flight.h>
 #include <Flight/LaRCsim/ls_interface.h>
+#include <Include/fg_constants.h>
+#include <Math/fg_geodesy.h>
 
 
 fgFLIGHT cur_flight_params;
@@ -58,6 +60,8 @@ int fgFlightModelInit(int model, fgFLIGHT *f, double dt) {
 int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
     int result;
 
+    // printf("Altitude = %.2f\n", FG_Altitude * 0.3048);
+
     if ( model == FG_LARCSIM ) {
        fgLaRCsimUpdate(f, multiloop);
     } else {
@@ -70,11 +74,41 @@ int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
 }
 
 
+/* Set the altitude (force) */
+int fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters) {
+    double sea_level_radius_meters;
+    double lat_geoc;
+    // Set the FG variables first
+    fgGeodToGeoc( FG_Latitude, alt_meters, 
+                 &sea_level_radius_meters, &lat_geoc);
+
+    FG_Altitude = alt_meters * METER_TO_FEET;
+    FG_Radius_to_vehicle = FG_Altitude + 
+       (sea_level_radius_meters * METER_TO_FEET);
+
+    if ( model == FG_LARCSIM ) {
+       ls_ForceAltitude(FG_Altitude);
+    } else {
+       fgPrintf( FG_FLIGHT, FG_WARN, 
+                 "Unimplemented flight model == %d\n", model );
+    }
+
+}
+
+
 /* $Log$
-/* Revision 1.12  1998/04/21 16:59:33  curt
-/* Integrated autopilot.
-/* Prepairing for C++ integration.
+/* Revision 1.14  1998/07/12 03:08:27  curt
+/* Added fgFlightModelSetAltitude() to force the altitude to something
+/* other than the current altitude.  LaRCsim doesn't let you do this by just
+/* changing FG_Altitude.
 /*
+ * Revision 1.13  1998/04/25 22:06:28  curt
+ * Edited cvs log messages in source files ... bad bad bad!
+ *
+ * Revision 1.12  1998/04/21 16:59:33  curt
+ * Integrated autopilot.
+ * Prepairing for C++ integration.
+ *
  * Revision 1.11  1998/04/18 04:14:04  curt
  * Moved fg_debug.c to it's own library.
  *
@@ -83,7 +117,7 @@ int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
  * <chotchkiss@namg.us.anritsu.com>
  *
  * Revision 1.9  1998/01/27 00:47:53  curt
- * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
+ * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
  * system and commandline/config file processing code.
  *
  * Revision 1.8  1998/01/19 19:27:03  curt