From: curt <curt>
Date: Sat, 17 Mar 2001 21:06:43 +0000 (+0000)
Subject: Julian Foad: fixes to meters/feet confusion.  (Also length of "--vNorth="
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=4cf4edcfb40d384de6010c5588796a76a20ad57b;p=flightgear.git

Julian Foad: fixes to meters/feet confusion.  (Also length of "--vNorth="
is 9 not 8.)  Note that the initial altitude setting was placing us way below
the ground, but as it doesn't seem to have caused us problems, it's probably
redundant!
---

diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index 3f330270e..d2e5bb305 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -380,12 +380,15 @@ bool fgInitPosition( void ) {
 
     // if we requested on ground startups
     if ( fgGetBool( "/sim/startup/onground" ) ) {
-	fgSetDouble("/position/altitude", scenery.cur_elev + 1 );
+        fgSetDouble( "/position/altitude", (scenery.cur_elev + 1)
+		     * METERS_TO_FEET );
     }
 
     // if requested altitude is below ground level
-    if ( scenery.cur_elev > fgGetDouble("/position/altitude") - 1) {
-	fgSetDouble("/position/altitude", scenery.cur_elev + 1 );
+    if ( scenery.cur_elev >
+	 fgGetDouble("/position/altitude") * METERS_TO_FEET - 1) {
+	fgSetDouble("/position/altitude",
+		    (scenery.cur_elev + 1) * METERS_TO_FEET );
     }
 
     FG_LOG( FG_GENERAL, FG_INFO,
diff --git a/src/Main/options.cxx b/src/Main/options.cxx
index 52d30fab4..636db9029 100644
--- a/src/Main/options.cxx
+++ b/src/Main/options.cxx
@@ -186,6 +186,8 @@ fgSetDefaults ()
     fgSetString("/sim/networking/call-sign", "Johnny");
 }
 
+
+// parse a time string ([+/-]%f[:%f[:%f]]) into hours
 static double
 parse_time(const string& time_in) {
     char *time_str, num[256];
@@ -265,6 +267,7 @@ parse_time(const string& time_in) {
 }
 
 
+// parse a date string (yyyy:mm:dd:hh:mm:ss) into a time_t (seconds)
 static long int 
 parse_date( const string& date)
 {
@@ -373,7 +376,7 @@ parse_date( const string& date)
 }
 
 
-/// parse degree in the form of [+/-]hhh:mm:ss
+// parse angle in the form of [+/-]ddd:mm:ss into degrees
 static double
 parse_degree( const string& degree_str) {
     double result = parse_time( degree_str );
@@ -384,7 +387,7 @@ parse_degree( const string& degree_str) {
 }
 
 
-// parse time offset command line option
+// parse time offset string into seconds
 static int
 parse_time_offset( const string& time_str) {
     int result;
@@ -454,7 +457,7 @@ parse_channel( const string& type, const string& channel_str ) {
 }
 
 
-// Parse --wp=ID[,alt]
+// Parse --wp=ID[@alt]
 static bool 
 parse_wp( const string& arg ) {
     string id, alt_str;
@@ -586,52 +589,46 @@ parse_option (const string& arg)
 			atof(arg.substr(11)) * METER_TO_FEET);
     } else if ( arg.find( "--uBody=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "UVW");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
 	  fgSetDouble("/velocities/uBody", atof(arg.substr(8)));
 	else
 	  fgSetDouble("/velocities/uBody",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(8)) * METER_TO_FEET);
     } else if ( arg.find( "--vBody=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "UVW");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
 	  fgSetDouble("/velocities/vBody", atof(arg.substr(8)));
 	else
 	  fgSetDouble("/velocities/vBody",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(8)) * METER_TO_FEET);
     } else if ( arg.find( "--wBody=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "UVW");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
 	  fgSetDouble("/velocities/wBody", atof(arg.substr(8)));
 	else
 	  fgSetDouble("/velocities/wBody",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(8)) * METER_TO_FEET);
     } else if ( arg.find( "--vNorth=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "NED");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
-	  fgSetDouble("/velocities/speed-north", atof(arg.substr(8)));
+	  fgSetDouble("/velocities/speed-north", atof(arg.substr(9)));
 	else
 	  fgSetDouble("/velocities/speed-north",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(9)) * METER_TO_FEET);
     } else if ( arg.find( "--vEast=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "NED");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
 	  fgSetDouble("/velocities/speed-east", atof(arg.substr(8)));
 	else
 	  fgSetDouble("/velocities/speed-east",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(8)) * METER_TO_FEET);
     } else if ( arg.find( "--vDown=" ) == 0 ) {
         fgSetString("/sim/startup/speed-set", "NED");
-				// FIXME: the units are totally confused here
 	if ( fgGetString("/sim/startup/units") == "feet" )
 	  fgSetDouble("/velocities/speed-down", atof(arg.substr(8)));
 	else
 	  fgSetDouble("/velocities/speed-down",
-			       atof(arg.substr(8)) * FEET_TO_METER);
+			       atof(arg.substr(8)) * METER_TO_FEET);
     } else if ( arg.find( "--vc=" ) == 0) {
         fgSetString("/sim/startup/speed-set", "knots");
 	fgSetDouble("/velocities/airspeed", atof(arg.substr(5)));