# include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
#endif
+#ifdef WIN32
+# include <windows.h>
+# ifdef __CYGWIN32__
+# define NEAR /* */
+# define FAR /* */
+# endif
+# include <mmsystem.h>
+#endif
+
+#include <Astro/sky.hxx>
+#include <Astro/solarsystem.hxx>
#include <Debug/fg_debug.h>
-#include <Flight/flight.h>
+#include <Flight/flight.hxx>
#include <Include/fg_constants.h>
#include <Main/options.hxx>
+#include <Time/light.hxx>
#include "fg_time.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
-struct fgTIME cur_time_params;
+fgTIME cur_time_params;
-// Initialize the time dependent variables
-void fgTimeInit(struct fgTIME *t) {
- fgOPTIONS *o;
+// Force an update of the sky and lighting parameters
+static void local_update_sky_and_lighting_params( void ) {
+ // fgSunInit();
+ SolarSystem::theSolarSystem->rebuild();
+ cur_light_params.Update();
+ fgSkyColorsInit();
+}
- o = ¤t_options;
+// Initialize the time dependent variables
+void fgTimeInit(fgTIME *t) {
fgPrintf( FG_EVENT, FG_INFO, "Initializing Time\n");
t->gst_diff = -9999.0;
- fgPrintf( FG_EVENT, FG_DEBUG, "o->time_offset = %d\n", o->time_offset);
- t->warp = o->time_offset;
+ fgPrintf( FG_EVENT, FG_DEBUG, "time offset = %d\n",
+ current_options.get_time_offset() );
+
+ t->warp = current_options.get_time_offset();
t->warp_delta = 0;
+
+ t->pause = current_options.get_pause();
}
// Portability wrap to get current time.
void timestamp(fg_timestamp *timestamp) {
-#if defined( HAVE_GETTIMEOFDAY )
+#if defined( WIN32 )
+ unsigned int t;
+ t = timeGetTime();
+ timestamp->seconds = 0;
+ timestamp->millis = t;
+#elif defined( HAVE_GETTIMEOFDAY )
struct timeval current;
struct timezone tz;
// fg_timestamp currtime;
// Return duration in millis from first to last
long timediff(fg_timestamp *first, fg_timestamp *last) {
- return 1000 * (last->seconds - first->seconds) +
- (last->millis - first->millis);
+#if defined( WIN32 )
+ return (last->millis - first->millis);
+#else
+ return ( 1000 * (last->seconds - first->seconds) +
+ (last->millis - first->millis) );
+#endif
}
// Return new timestamp given a time stamp and an interval to add in
void timesum(fg_timestamp *res, fg_timestamp *start, long millis) {
+#ifdef WIN32
+ res->seconds = 0;
+ res->millis = ( start->millis + millis );
+#else
res->seconds = start->seconds +
( start->millis + millis ) / 1000;
res->millis = ( start->millis + millis ) % 1000;
+#endif
}
}
-// given an mjd, return greenwich mean siderial time, gst
+// given an mjd, return greenwich mean sidereal time, gst
double utc_gst (double mjd) {
double gst;
x /= 3600.0;
gst = (1.0/SIDRATE)*hr + x;
- fgPrintf( FG_EVENT, FG_DEBUG, " gst => %.4f\n", gst);
+ fgPrintf( FG_EVENT, FG_DEBUG, " gst => %.4f\n", gst);
return(gst);
}
}
-// return a courser but cheaper estimate of sidereal time
-double sidereal_course(struct tm *gmt, time_t now, double lng) {
- time_t start, start_gmt;
- struct tm mt;
- long int offset;
- double diff, part, days, hours, lst;
-
+// Fix up timezone if using ftime()
+long int fix_up_timezone( long int timezone_orig ) {
+#if !defined( HAVE_GETTIMEOFDAY ) && defined( HAVE_FTIME )
// ftime() needs a little extra help finding the current timezone
-#if defined( HAVE_GETTIMEOFDAY )
-#elif defined( HAVE_GETLOCALTIME )
-#elif defined( HAVE_FTIME )
struct timeb current;
+ ftime(¤t);
+ return( current.timezone * 60 );
#else
-# error Port me
+ return( timezone_orig );
#endif
+}
-#ifdef __CYGWIN32__
- int daylight;
- long int timezone;
-#endif // __CYGWIN32__
- /*
- printf(" COURSE: GMT = %d/%d/%2d %d:%02d:%02d\n",
- gmt->tm_mon, gmt->tm_mday, gmt->tm_year,
- gmt->tm_hour, gmt->tm_min, gmt->tm_sec);
- */
+// Return time_t for Sat Mar 21 12:00:00 GMT
+//
+// I believe the mktime() has a SYSV vs. BSD behavior difference.
+//
+// The BSD style mktime() is nice because it returns its result
+// assuming you have specified the input time in GMT
+//
+// The SYSV style mktime() is a pain because it returns its result
+// assuming you have specified the input time in your local timezone.
+// Therefore you have to go to extra trouble to convert back to GMT.
+//
+// If you are having problems with incorrectly positioned astronomical
+// bodies, this is a really good place to start looking.
+
+time_t get_start_gmt(int year) {
+ struct tm mt;
+
+ // For now we assume that if daylight is not defined in
+ // /usr/include/time.h that we have a machine with a BSD behaving
+ // mktime()
+# if !defined(HAVE_DAYLIGHT)
+# define MK_TIME_IS_GMT 1
+# endif
+
+ // timezone seems to work as a proper offset for Linux & Solaris
+# if defined( __linux__ ) || defined( __sun__ )
+# define TIMEZONE_OFFSET_WORKS 1
+# endif
mt.tm_mon = 2;
mt.tm_mday = 21;
- mt.tm_year = gmt->tm_year;
+ mt.tm_year = year;
mt.tm_hour = 12;
mt.tm_min = 0;
mt.tm_sec = 0;
mt.tm_isdst = -1; // let the system determine the proper time zone
- start = mktime(&mt);
+# if defined( MK_TIME_IS_GMT )
+ return ( mktime(&mt) );
+# else // ! defined ( MK_TIME_IS_GMT )
- /* printf("start1 = %ld\n", start);
- fgPrintf( FG_EVENT, FG_DEBUG, "start2 = %s", ctime(&start));
- fgPrintf( FG_EVENT, FG_DEBUG, "start3 = %ld\n", start); */
+ long int start = mktime(&mt);
-#ifndef __CYGWIN32__
- daylight = mt.tm_isdst;
-#else
- // Yargs ... I'm just hardcoding this arbitrarily so it doesn't
- // jump around for win32 people
- daylight = 0;
- fgPrintf( FG_EVENT, FG_WARN,
- "no daylight savings info ... being hardcoded to %d\n", daylight);
-#endif
+ fgPrintf( FG_EVENT, FG_DEBUG, "start1 = %ld\n", start);
+ // the ctime() call can screw up time progression on some versions
+ // of Linux
+ // fgPrintf( FG_EVENT, FG_DEBUG, "start2 = %s", ctime(&start));
+ fgPrintf( FG_EVENT, FG_DEBUG, "(tm_isdst = %d)\n", mt.tm_isdst);
- // ftime() needs a little extra help finding the current timezone
-#if defined( HAVE_GETTIMEOFDAY )
-#elif defined( HAVE_GETLOCALTIME )
-#elif defined( HAVE_FTIME )
- ftime(¤t);
- timezone = current.timezone * 60;
-#else
-# error Port me
-#endif
+ timezone = fix_up_timezone( timezone );
+
+# if defined( TIMEZONE_OFFSET_WORKS )
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ "start = %ld, timezone = %ld\n", start, timezone );
+ return( start - timezone );
+# else // ! defined( TIMEZONE_OFFSET_WORKS )
+ daylight = mt.tm_isdst;
if ( daylight > 0 ) {
daylight = 1;
} else if ( daylight < 0 ) {
fgPrintf( FG_EVENT, FG_WARN,
- "OOOPS, big time problem in fg_time.c, no daylight savings info.\n");
+ "OOOPS, problem in fg_time.cxx, no daylight savings info.\n");
}
- offset = -(timezone / 3600 - daylight);
+ long int offset = -(timezone / 3600 - daylight);
- // printf(" Raw time zone offset = %ld\n", timezone);
- // printf(" Daylight Savings = %d\n", daylight);
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ " Raw time zone offset = %ld\n", timezone);
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ " Daylight Savings = %d\n", daylight);
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ " Local hours from GMT = %ld\n", offset);
+
+ long int start_gmt = start - timezone + (daylight * 3600);
+
+ fgPrintf( FG_EVENT, FG_DEBUG, " March 21 noon (CST) = %ld\n", start);
- // printf(" Local hours from GMT = %ld\n", offset);
+ return ( start_gmt );
+# endif // ! defined( TIMEZONE_OFFSET_WORKS )
+# endif // ! defined ( MK_TIME_IS_GMT )
+}
- start_gmt = start - timezone + (daylight * 3600);
- // printf(" March 21 noon (CST) = %ld\n", start);
- // printf(" March 21 noon (GMT) = %ld\n", start_gmt);
+// return a courser but cheaper estimate of sidereal time
+double sidereal_course(fgTIME *t, double lng) {
+ struct tm *gmt;
+ time_t start_gmt, now;
+ double diff, part, days, hours, lst;
- diff = (now - start_gmt) / (3600.0 * 24.0);
+ gmt = t->gmt;
+ now = t->cur_time;
+ start_gmt = get_start_gmt(gmt->tm_year);
- // printf(" Time since 3/21/%2d GMT = %.2f\n", gmt->tm_year, diff);
+ fgPrintf(FG_EVENT, FG_DEBUG,
+ " COURSE: GMT = %d/%d/%2d %d:%02d:%02d\n",
+ gmt->tm_mon, gmt->tm_mday, gmt->tm_year,
+ gmt->tm_hour, gmt->tm_min, gmt->tm_sec);
+
+ fgPrintf( FG_EVENT, FG_DEBUG, " March 21 noon (GMT) = %ld\n", start_gmt);
+
+ diff = (now - start_gmt) / (3600.0 * 24.0);
+
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ " Time since 3/21/%2d GMT = %.2f\n", gmt->tm_year, diff);
part = fmod(diff, 1.0);
days = diff - part;
lst += 24.0;
}
- /* printf(" days = %.1f hours = %.2f lon = %.2f lst = %.2f\n",
- days, hours, lng, lst); */
+ fgPrintf( FG_EVENT, FG_DEBUG,
+ " days = %.1f hours = %.2f lon = %.2f lst = %.2f\n",
+ days, hours, lng, lst);
return(lst);
}
// Update time variables such as gmt, julian date, and sidereal time
-void fgTimeUpdate(fgFLIGHT *f, struct fgTIME *t) {
+void fgTimeUpdate(fgFLIGHT *f, fgTIME *t) {
double gst_precise, gst_course;
fgPrintf( FG_EVENT, FG_BULK, "Updating time\n");
" Current Unix calendar time = %ld warp = %ld delta = %ld\n",
t->cur_time, t->warp, t->warp_delta);
+ if ( t->warp_delta ) {
+ // time is changing so force an update
+ local_update_sky_and_lighting_params();
+ }
+
// get GMT break down for current time
t->gmt = gmtime(&t->cur_time);
fgPrintf( FG_EVENT, FG_BULK,
// calculation to get the difference.
fgPrintf( FG_EVENT, FG_INFO, " First time, doing precise gst\n");
t->gst = gst_precise = sidereal_precise(t->mjd, 0.00);
- gst_course = sidereal_course(t->gmt, t->cur_time, 0.00);
+ gst_course = sidereal_course(t, 0.00);
t->gst_diff = gst_precise - gst_course;
- t->lst =
- sidereal_course(t->gmt, t->cur_time, -(FG_Longitude * RAD_TO_DEG))
- + t->gst_diff;
+ t->lst = sidereal_course(t, -(FG_Longitude * RAD_TO_DEG)) + t->gst_diff;
} else {
// course + difference should drift off very slowly
- t->gst =
- sidereal_course(t->gmt, t->cur_time, 0.00) + t->gst_diff;
- t->lst =
- sidereal_course(t->gmt, t->cur_time, -(FG_Longitude * RAD_TO_DEG))
- + t->gst_diff;
+ t->gst = sidereal_course(t, 0.00) + t->gst_diff;
+ t->lst = sidereal_course(t, -(FG_Longitude * RAD_TO_DEG)) + t->gst_diff;
}
fgPrintf( FG_EVENT, FG_DEBUG,
" Current lon=0.00 Sidereal Time = %.3f\n", t->gst);
// $Log$
+// Revision 1.19 1998/10/17 01:34:29 curt
+// C++ ifying ...
+//
+// Revision 1.18 1998/10/02 21:36:09 curt
+// Fixes to try to break through the win95/98 18.3 fps barrier.
+//
+// Revision 1.17 1998/09/15 04:27:49 curt
+// Changes for new astro code.
+//
+// Revision 1.16 1998/08/29 13:11:32 curt
+// Bernie Bright writes:
+// I've created some new classes to enable pointers-to-functions and
+// pointers-to-class-methods to be treated like objects. These objects
+// can be registered with fgEVENT_MGR.
+//
+// File "Include/fg_callback.hxx" contains the callback class defns.
+//
+// Modified fgEVENT and fgEVENT_MGR to use the callback classes. Also
+// some minor tweaks to STL usage.
+//
+// Added file "Include/fg_stl_config.h" to deal with STL portability
+// issues. I've added an initial config for egcs (and probably gcc-2.8.x).
+// I don't have access to Visual C++ so I've left that for someone else.
+// This file is influenced by the stl_config.h file delivered with egcs.
+//
+// Added "Include/auto_ptr.hxx" which contains an implementation of the
+// STL auto_ptr class which is not provided in all STL implementations
+// and is needed to use the callback classes.
+//
+// Deleted fgLightUpdate() which was just a wrapper to call
+// fgLIGHT::Update().
+//
+// Modified fg_init.cxx to register two method callbacks in place of the
+// old wrapper functions.
+//
+// Revision 1.15 1998/08/24 20:12:16 curt
+// Rewrote sidereal_course with simpler parameters.
+//
+// Revision 1.14 1998/08/05 00:20:07 curt
+// Added a local routine to update lighting params every frame when time is
+// accelerated.
+//
+// Revision 1.13 1998/07/30 23:48:55 curt
+// Sgi build tweaks.
+// Pause support.
+//
+// Revision 1.12 1998/07/27 18:42:22 curt
+// Added a pause option.
+//
+// Revision 1.11 1998/07/22 21:45:37 curt
+// fg_time.cxx: Removed call to ctime() in a printf() which should be harmless
+// but seems to be triggering a bug.
+// light.cxx: Added code to adjust fog color based on sunrise/sunset effects
+// and view orientation. This is an attempt to match the fog color to the
+// sky color in the center of the screen. You see discrepancies at the
+// edges, but what else can be done?
+// sunpos.cxx: Caculate local direction to sun here. (what compass direction
+// do we need to face to point directly at sun)
+//
+// Revision 1.10 1998/07/13 21:02:07 curt
+// Wrote access functions for current fgOPTIONS.
+//
+// Revision 1.9 1998/06/12 00:59:53 curt
+// Build only static libraries.
+// Declare memmove/memset for Sloaris.
+// Rewrote fg_time.c routine to get LST start seconds to better handle
+// Solaris, and be easier to port, and understand the GMT vs. local
+// timezone issues.
+//
+// Revision 1.8 1998/06/05 18:18:13 curt
+// Incorporated some automake conditionals to try to support mktime() correctly
+// on a wider variety of platforms.
+// Added the declaration of memmove needed by the stl which apparently
+// solaris only defines for cc compilations and not for c++ (__STDC__)
+//
+// Revision 1.7 1998/05/30 01:57:25 curt
+// misc updates.
+//
+// Revision 1.6 1998/05/02 01:53:17 curt
+// Fine tuning mktime() support because of varying behavior on different
+// platforms.
+//
+// Revision 1.5 1998/04/28 21:45:34 curt
+// Fixed a horible bug that cause the time to be *WAY* off when compiling
+// with the CygWin32 compiler. This may not yet completely address other
+// Win32 compilers, but we'll have to take them on a case by case basis.
+//
+// Revision 1.4 1998/04/28 01:22:16 curt
+// Type-ified fgTIME and fgVIEW.
+//
// Revision 1.3 1998/04/25 22:06:33 curt
// Edited cvs log messages in source files ... bad bad bad!
//
projects / flightgear.git / blobdiff