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The interface to sunpos now updates a global structure rather than returning

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current sun position.
This commit is contained in:
curt 1997-08-13 20:23:49 +00:00
parent 4c139cadf3
commit bcf7870083
2 changed files with 30 additions and 5 deletions
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30
Time/sunpos.c
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@ -44,7 +44,11 @@
#include <time.h>
#include "sunpos.h"
#include "fg_time.h"
#include "../constants.h"
#include "../Math/fg_geodesy.h"
#include "../Math/polar.h"
#undef E
@ -253,10 +257,32 @@ void fgSunPosition(time_t ssue, double *lon, double *lat) {
}
/* update the cur_time_params structure with the current sun position */
void fgUpdateSunPos() {
struct time_params *t;
double sun_gd_lat, sl_radius;
static int time_warp = 0;
t = &cur_time_params;
time_warp += 600; /* increase this to make the world spin real fast */
fgSunPosition(time(NULL) + time_warp, &t->sun_lon, &sun_gd_lat);
fgGeodToGeoc(sun_gd_lat, 0.0, &sl_radius, &t->sun_gc_lat);
t->fg_sunpos = fgPolarToCart(t->sun_lon, t->sun_gc_lat, sl_radius);
}
/* $Log$
/* Revision 1.2 1997/08/06 00:24:32 curt
/* Working on correct real time sun lighting.
/* Revision 1.3 1997/08/13 20:23:49 curt
/* The interface to sunpos now updates a global structure rather than returning
/* current sun position.
/*
* Revision 1.2 1997/08/06 00:24:32 curt
* Working on correct real time sun lighting.
*
* Revision 1.1 1997/08/01 15:27:56 curt
* Initial revision.
*

5
Time/sunpos.h
View file

@ -43,9 +43,8 @@
#include <time.h>
/* given a particular time (expressed in seconds since the unix
* epoch), compute position on the earth (lat, lon) such that sun is
* directly overhead. (lat, lon are reported in radians */
/* update the cur_time_params structure with the current sun position */
void fgUpdateSunPos();
void fgSunPosition(time_t ssue, double *lon, double *lat);