From 1a6e2509c729c596e6ce06d010c59dad69ec1a1d Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Fri, 7 Jul 2000 14:59:04 +0000
Subject: [PATCH] More SGTime clean ups.

---
 configure.in               |  2 +-
 simgear/config.h.in        | 13 +++----
 simgear/timing/Makefile.am |  3 +-
 simgear/timing/sg_time.cxx | 70 +++++++++++++++-----------------------
 simgear/timing/sg_time.hxx | 43 +++++++++++------------
 5 files changed, 56 insertions(+), 75 deletions(-)

diff --git a/configure.in b/configure.in
index fde76c7f..4be68112 100644
--- a/configure.in
+++ b/configure.in
@@ -6,7 +6,7 @@ dnl $Id$
 AC_INIT(simgear/bucket/newbucket.cxx)
 
 dnl Initialize the automake stuff
-AM_INIT_AUTOMAKE(SimGear, 0.0.11)
+AM_INIT_AUTOMAKE(SimGear, 0.0.12)
 
 dnl Checks for programs.
 AC_PROG_MAKE_SET
diff --git a/simgear/config.h.in b/simgear/config.h.in
index 425f8173..410fd7a8 100644
--- a/simgear/config.h.in
+++ b/simgear/config.h.in
@@ -50,9 +50,6 @@
 /* Define if you have zlib installed system wide.  */
 #undef HAVE_ZLIB
 
-/* Define to package name */
-#undef PACKAGE
-
 /* Define as the return type of signal handlers (int or void).  */
 #undef RETSIGTYPE
 
@@ -68,9 +65,6 @@
 /* Define if your <sys/time.h> declares struct tm.  */
 #undef TM_IN_SYS_TIME
 
-/* Define to version number */
-#undef VERSION
-
 /* Define if compiling on a Winbloze (95, NT, etc.) platform */
 #undef WIN32
 
@@ -205,3 +199,10 @@
 
 /* Define if you have the socket library (-lsocket).  */
 #undef HAVE_LIBSOCKET
+
+/* Name of package */
+#undef PACKAGE
+
+/* Version number of package */
+#undef VERSION
+
diff --git a/simgear/timing/Makefile.am b/simgear/timing/Makefile.am
index f2521b17..6d96633b 100644
--- a/simgear/timing/Makefile.am
+++ b/simgear/timing/Makefile.am
@@ -4,12 +4,13 @@ lib_LIBRARIES = libsgtiming.a
 
 include_HEADERS = \
 	geocoord.h \
+	lowleveltime.h \
 	sg_time.hxx \
 	timezone.h
 
 libsgtiming_a_SOURCES = \
 	geocoord.cxx \
-	lowleveltime.cxx lowleveltime.h \
+	lowleveltime.cxx \
 	sg_time.cxx \
 	timezone.cxx \
 	# event.cxx event.hxx \
diff --git a/simgear/timing/sg_time.cxx b/simgear/timing/sg_time.cxx
index 29750535..5d462725 100644
--- a/simgear/timing/sg_time.cxx
+++ b/simgear/timing/sg_time.cxx
@@ -51,28 +51,17 @@
 
 #include <simgear/constants.h>
 #include <simgear/debug/logstream.hxx>
-// #include <simgear/magvar/magvar.hxx>
 #include <simgear/misc/fgpath.hxx>
 
-// #include <FDM/flight.hxx>
-// #include <Main/options.hxx>
-// #include <Time/light.hxx>
-
 #include "sg_time.hxx"
 #include "timezone.h"
 #include "lowleveltime.h"
-// #include "moonpos.hxx"
-// #include "sunpos.hxx"
 
 
 #define DEGHR(x)        ((x)/15.)
 #define RADHR(x)        DEGHR(x*RAD_TO_DEG)
 
 
-// #define MK_TIME_IS_GMT 0         // default value
-// #define TIME_ZONE_OFFSET_WORK 0  // default value
-
-
 SGTime::SGTime( const string& root )
 {
     if (cur_time_params) {
@@ -89,8 +78,8 @@ SGTime::SGTime( const string& root )
 
     FG_LOG( FG_EVENT, FG_INFO, "Reading timezone info from: " << zone.str() );
     tzContainer = new TimezoneContainer( zone.c_str() );
-    warp=0;
-    warp_delta=0;
+    // warp=0;
+    // warp_delta=0;
 }
 
 
@@ -115,22 +104,18 @@ void SGTime::updateLocal( double lon, double lat, const string& root )
   zonename = strdup( zone.c_str() );
   currGMT = get_gmt( gmtime(&cur_time) );
   aircraftLocalTime = get_gmt( (fgLocaltime(&cur_time, zone.c_str())) );
-  localOffset = aircraftLocalTime - currGMT;
-  // cerr << "Using " << localOffset << " as local time offset Timezone is " 
-  //      << zonename << endl;
+  local_offset = aircraftLocalTime - currGMT;
+  cout << "Using " << local_offset << " as local time offset Timezone is " 
+       << zonename << endl;
 }
 
 // Initialize the time dependent variables (maybe I'll put this in the
 // constructor later)
-void SGTime::init( double lon, double lat, const string& root, 
-		   time_t timeOffset, sgTimingOffsetType offsetType )
+void SGTime::init( double lon, double lat, const string& root )
+// time_t timeOffset, sgTimingOffsetType offsetType )
 {
     FG_LOG( FG_EVENT, FG_INFO, "Initializing Time" );
     gst_diff = -9999.0;
-    FG_LOG( FG_EVENT, FG_DEBUG, 
-	    "time offset = " << timeOffset );
-    // time_t timeOffset = current_options.get_time_offset();
-    // int offsetType = current_options.get_time_offset_type();
 
     time_t currGMT;
     time_t systemLocalTime;
@@ -152,13 +137,18 @@ void SGTime::init( double lon, double lat, const string& root,
     zone.append( "Timezone" );
     zone.append( nearestTz->getDescription() );
 
-    // printf("Using %s for timezone information\n", buffer);
+    cout << "Using " << zone.str() << " for timezone information" << endl;
     zonename = strdup( zone.c_str() );
+    cout << "zonename = " << zonename << endl;
     //show( buffer.c_str(), cur_time, 1); 
     //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
     //printf ("Current local time          = %24s", asctime(localtime(&cur_time)));
     currGMT = get_gmt( gmtime(&cur_time) );
+    cout << "currGMT = " << currGMT << endl;
+
     systemLocalTime = get_gmt( localtime(&cur_time) );
+    cout << "systemLocalTime = " << systemLocalTime << endl;
+
     aircraftLocalTime = get_gmt( fgLocaltime(&cur_time, zone.c_str()) ); 
     //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
     //printf ("Current local time          = %24s", asctime(localtime(&cur_time)));
@@ -169,6 +159,8 @@ void SGTime::init( double lon, double lat, const string& root,
     // printf("Gmt = %d, SLT = %d, (difference = %d)\n", currGMT, systemLocalTime,   (currGMT - systemLocalTime));
     // printf("Gmt = %d, ALT = %d, (difference = %d)\n", currGMT, aircraftLocalTime, (currGMT - aircraftLocalTime));
     // exit(1);
+
+#if 0
     // Okay, we now have six possible scenarios
     switch (offsetType)
 	{
@@ -201,6 +193,8 @@ void SGTime::init( double lon, double lat, const string& root,
 
     warp_delta = 0;
     // pause = current_options.get_pause();
+#endif
+
 }
 
 
@@ -218,7 +212,6 @@ void SGTime::cal_mjd (int mn, double dy, int yr)
   
     if (mn == last_mn && yr == last_yr && dy == last_dy) {
 	mjd = last_mjd;
-	//return(mjd);
     }
   
     m = mn;
@@ -250,8 +243,6 @@ void SGTime::cal_mjd (int mn, double dy, int yr)
     last_dy = dy;
     last_yr = yr;
     last_mjd = mjd;
-  
-    //return(mjd);
 }
 
 
@@ -267,7 +258,7 @@ void SGTime::utc_gst ()
     x /= 3600.0;
     gst = (1.0/SIDRATE)*hr + x;
 
-    FG_LOG( FG_EVENT, FG_DEBUG, "  gst => " << gst );
+    FG_LOG( FG_EVENT, FG_INFO, "  gst => " << gst );
 }
 
 
@@ -338,28 +329,21 @@ double SGTime::sidereal_course(double lng)
 
 
 // Update time variables such as gmt, julian date, and sidereal time
-void SGTime::update( double lon, double lat, double alt_m ) {
+void SGTime::update( double lon, double lat, double alt_m, long int warp ) {
     double gst_precise, gst_course;
 
-    FG_LOG( FG_EVENT, FG_DEBUG, "Updating time" );
+    FG_LOG( FG_EVENT, FG_INFO, "Updating time" );
 
     // get current Unix calendar time (in seconds)
-    warp += warp_delta;
+    // warp += warp_delta;
     cur_time = time(NULL) + warp;
-    FG_LOG( FG_EVENT, FG_DEBUG, 
+    FG_LOG( FG_EVENT, FG_INFO, 
 	    "  Current Unix calendar time = " << cur_time 
-	    << "  warp = " << warp << "  delta = " << warp_delta );
-
-#if 0
-    if ( warp_delta ) {
-	// time is changing so force an update
-	local_update_sky_and_lighting_params();
-    }
-#endif
+	    << "  warp = " << warp );
 
     // get GMT break down for current time
     gmt = gmtime(&cur_time);
-    FG_LOG( FG_EVENT, FG_DEBUG, 
+    FG_LOG( FG_EVENT, FG_INFO, 
 	    "  Current GMT = " << gmt->tm_mon+1 << "/" 
 	    << gmt->tm_mday << "/" << gmt->tm_year << " "
 	    << gmt->tm_hour << ":" << gmt->tm_min << ":" 
@@ -377,7 +361,7 @@ void SGTime::update( double lon, double lat, double alt_m ) {
 
     // convert "back" to Julian date + partial day (as a fraction of one)
     jd = mjd + MJD0;
-    FG_LOG( FG_EVENT, FG_DEBUG, "  Current Julian Date = " << jd );
+    FG_LOG( FG_EVENT, FG_INFO, "  Current Julian Date = " << jd );
 
     // printf("  Current Longitude = %.3f\n", FG_Longitude * RAD_TO_DEG);
 
@@ -398,9 +382,9 @@ void SGTime::update( double lon, double lat, double alt_m ) {
 	lst = sidereal_course( -(lon * RAD_TO_DEG)) + gst_diff;
     }
 
-    FG_LOG( FG_EVENT, FG_DEBUG,
+    FG_LOG( FG_EVENT, FG_INFO,
 	    "  Current lon=0.00 Sidereal Time = " << gst );
-    FG_LOG( FG_EVENT, FG_DEBUG,
+    FG_LOG( FG_EVENT, FG_INFO,
 	    "  Current LOCAL Sidereal Time = " << lst << " (" 
 	    << sidereal_precise(-(lon * RAD_TO_DEG)) 
 	    << ") (diff = " << gst_diff << ")" );
diff --git a/simgear/timing/sg_time.hxx b/simgear/timing/sg_time.hxx
index 0a1cd0a0..8acd4293 100644
--- a/simgear/timing/sg_time.hxx
+++ b/simgear/timing/sg_time.hxx
@@ -71,45 +71,38 @@ private:
     // tzContainer stores all the current Timezone control points/
     TimezoneContainer* tzContainer;
 
-    //Store the current local timezone name;
+    // Points to the current local timezone name;
     char *zonename;
 
     // Unix "calendar" time in seconds
     time_t cur_time;
 
-    // Break down of GMT time
+    // Break down of equivalent GMT time
     struct tm *gmt;
 
+    // offset of local time relative to GMT
+    time_t local_offset;
+
     // Julian date
     double jd;
 
     // modified Julian date
     double mjd;
 
-    double last_mjd, last_dy;
-    int last_mn, last_yr;
-
     // side real time at prime meridian
     double gst;
 
     // local sidereal time
     double lst;
 
-    // local offset to GMT
-    time_t localOffset;
-
     // the difference between the precise sidereal time algorithm
-    // result and the course result.  course + diff has good accuracy
-    // for the short term
+    // result and the course result.  course_gst + diff has good
+    // accuracy for the short term
     double gst_diff;
 
-    // An offset in seconds from the true time.  Allows us to adjust
-    // the effective time of day.
-    long int warp;
-
-    // How much to change the value of warp each iteration.  Allows us
-    // to make time progress faster than normal.
-    long int warp_delta;
+    // internal book keeping data
+    double last_mjd, last_dy;
+    int last_mn, last_yr;
 
 public:
 
@@ -123,15 +116,15 @@ public:
     inline time_t get_cur_time() const { return cur_time; };
     inline struct tm* getGmt()const { return gmt; };
   
-    void adjust_warp(int val) { warp += val; };
-    void adjust_warp_delta(int val) { warp_delta += val; };
+    // void adjust_warp(int val) { warp += val; };
+    // void adjust_warp_delta(int val) { warp_delta += val; };
 
     // Initialize the time dependent variables
-    void init( double lon, double lat, const string& root, 
-	       time_t timeOffset, sgTimingOffsetType offsetType );
+    void init( double lon, double lat, const string& root );
+    // time_t timeOffset, sgTimingOffsetType offsetType );
 
     // Update the time dependent variables
-    void update( double lon, double lat, double alt_m );
+    void update( double lon, double lat, double alt_m, long int warp );
     void updateLocal( double lon, double lat, const string& root );
 
     void cal_mjd (int mn, double dy, int yr);
@@ -146,11 +139,13 @@ public:
     time_t get_gmt(int year, int month, int day, 
 		   int hour, int minute, int second);
     time_t get_gmt(struct tm* the_time);
-  
+
+    inline char* get_zonename() const { return zonename; }
+
     char* format_time( const struct tm* p, char* buf );
     long int fix_up_timezone( long int timezone_orig );
 
-    inline int get_warp_delta() const { return warp_delta; }
+    // inline int get_warp_delta() const { return warp_delta; }
 };
 
 
-- 
2.39.5