**************************************************************************/
-#ifndef FG_TIME_H
-#define FG_TIME_H
+#ifndef _FG_TIME_H
+#define _FG_TIME_H
-#include "../types.h"
+#ifdef WIN32
+# include <windows.h>
+#endif
+
+#include <GL/glut.h>
+#include <time.h>
+
+#include <Include/fg_types.h>
+#include <Flight/flight.h>
/* Define a structure containing global time parameters */
-struct time_params {
- /* the point on the earth's surface above which the sun is directly
- * overhead */
- struct fgCartesianPoint fg_sunpos; /* in cartesian coordiantes */
+struct fgTIME {
+ /* the date/time in various forms */
+ time_t cur_time; /* Unix "calendar" time in seconds */
+ struct tm *gmt; /* Break down of GMT time */
+
+ double jd; /* Julian date */
+ double mjd; /* modified Julian date */
+
+ double gst; /* side real time at prime meridian */
+ double lst; /* local side real time */
+
+ double gst_diff; /* the difference between the precise
+ sidereal time algorithm result and the
+ course result. course + diff has good
+ accuracy for the short term */
+
+ long int warp; /* An offset in seconds from the true time.
+ Allows us to adjust the effective time of day. */
+
+ long int warp_delta; /* How much to change the value of warp each
+ iteration. Allows us to make time
+ progress faster than normal. */
+};
+
+extern struct fgTIME cur_time_params;
+
+
+/* Lighting is time dependent so it shows up here */
+/* Define a structure containing the global lighting parameters */
+struct fgLIGHT {
+ /* position of the sun in various forms */
double sun_lon, sun_gc_lat; /* in geocentric coordinates */
+ struct fgCartesianPoint fg_sunpos; /* in cartesian coordiantes */
+ GLfloat sun_vec[4]; /* (in view coordinates) */
+ GLfloat sun_vec_inv[4]; /* inverse (in view coordinates) */
+ double sun_angle; /* the angle between the sun and the
+ local horizontal */
+
+ /* Derived lighting values */
+ GLfloat scene_ambient[3]; /* ambient component */
+ GLfloat scene_diffuse[3]; /* diffuse component */
+ GLfloat fog_color[4]; /* fog color */
+ GLfloat sky_color[4]; /* clear screen color */
};
-extern struct time_params cur_time_params;
+extern struct fgLIGHT cur_light_params;
+
+
+/* Initialize the time dependent variables */
+void fgTimeInit(struct fgTIME *t);
+/* Update the time dependent variables */
+void fgTimeUpdate(struct fgFLIGHT *f, struct fgTIME *t);
-#endif /* FG_TIME_H */
+
+#endif /* _FG_TIME_H */
/* $Log$
-/* Revision 1.1 1997/08/13 21:56:00 curt
-/* Initial revision.
+/* Revision 1.15 1998/01/27 00:48:06 curt
+/* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
+/* system and commandline/config file processing code.
/*
+ * Revision 1.14 1998/01/22 02:59:43 curt
+ * Changed #ifdef FILE_H to #ifdef _FILE_H
+ *
+ * Revision 1.13 1998/01/19 19:27:20 curt
+ * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
+ * This should simplify things tremendously.
+ *
+ * Revision 1.12 1998/01/05 18:44:37 curt
+ * Add an option to advance/decrease time from keyboard.
+ *
+ * Revision 1.11 1997/12/19 23:35:07 curt
+ * Lot's of tweaking with sky rendering and lighting.
+ *
+ * Revision 1.10 1997/12/15 23:55:07 curt
+ * Add xgl wrappers for debugging.
+ * Generate terrain normals on the fly.
+ *
+ * Revision 1.9 1997/12/10 22:37:55 curt
+ * Prepended "fg" on the name of all global structures that didn't have it yet.
+ * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
+ *
+ * Revision 1.8 1997/12/09 04:25:38 curt
+ * Working on adding a global lighting params structure.
+ *
+ * Revision 1.7 1997/11/25 19:25:41 curt
+ * Changes to integrate Durk's moon/sun code updates + clean up.
+ *
+ * Revision 1.6 1997/09/20 03:34:35 curt
+ * Still trying to get those durned stars aligned properly.
+ *
+ * Revision 1.5 1997/09/16 15:50:31 curt
+ * Working on star alignment and time issues.
+ *
+ * Revision 1.4 1997/09/13 02:00:08 curt
+ * Mostly working on stars and generating sidereal time for accurate star
+ * placement.
+ *
+ * Revision 1.3 1997/09/04 02:17:39 curt
+ * Shufflin' stuff.
+ *
+ * Revision 1.2 1997/08/27 03:30:36 curt
+ * Changed naming scheme of basic shared structures.
+ *
+ * Revision 1.1 1997/08/13 21:56:00 curt
+ * Initial revision.
+ *
*/