156 lines
5.1 KiB
C
156 lines
5.1 KiB
C
/**************************************************************************
|
|
* fg_time.h -- data structures and routines for managing time related stuff.
|
|
*
|
|
* Written by Curtis Olson, started August 1997.
|
|
*
|
|
* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* $Id$
|
|
* (Log is kept at end of this file)
|
|
**************************************************************************/
|
|
|
|
|
|
#ifndef _FG_TIME_H
|
|
#define _FG_TIME_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 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 fgLIGHT cur_light_params;
|
|
|
|
|
|
/* Initialize the time dependent variables */
|
|
void fgTimeInit(struct fgTIME *t);
|
|
|
|
/* Update the time dependent variables */
|
|
void fgTimeUpdate(fgFLIGHT *f, struct fgTIME *t);
|
|
|
|
|
|
#endif /* _FG_TIME_H */
|
|
|
|
|
|
/* $Log$
|
|
/* Revision 1.16 1998/02/07 15:29:47 curt
|
|
/* Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
|
|
/* <chotchkiss@namg.us.anritsu.com>
|
|
/*
|
|
* 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.
|
|
*
|
|
*/
|