#include <Aircraft/aircraft.h>
#include <Debug/fg_debug.h>
#include <Include/fg_constants.h>
+#include <Include/fg_types.h>
#include <Include/fg_zlib.h>
#include <Main/options.hxx>
#include <Main/views.hxx>
#define EpochStart (631065600)
#define DaysSinceEpoch(secs) (((secs)-EpochStart)*(1.0/(24*3600)))
-
+#define FG_MAX_STARS 3500
/* Define four structures, each with varying amounts of stars */
-/* static */ GLint stars[FG_STAR_LEVELS];
+static GLint stars[FG_STAR_LEVELS];
/* Initialize the Star Management Subsystem */
int fgStarsInit( void ) {
+ fgPoint3d starlist[FG_MAX_STARS];
fgFile fd;
/* struct CelestialCoord pltPos; */
char path[256], gzpath[256];
double min_magnitude[FG_STAR_LEVELS];
/* double ra_save, decl_save; */
/* double ra_save1, decl_save1; */
- int i;
+ int i, j, starcount, count;
fgPrintf( FG_ASTRO, FG_INFO, "Initializing stars\n");
fgPrintf( FG_ASTRO, FG_EXIT, "Big whups in stars.cxx\n");
}
+ fgPrintf( FG_ASTRO, FG_INFO, " Loading stars from %s\n", path);
+
+ // load star data file
+ if ( (fd = fgopen(path, "rb")) == NULL ) {
+ strcpy(gzpath, path);
+ strcat(gzpath, ".gz");
+ if ( (fd = fgopen(gzpath, "rb")) == NULL ) {
+ // Oops, lets not even try to continue. This is critical.
+ fgPrintf( FG_ASTRO, FG_EXIT,
+ "Cannot open star file: '%s'\n", path);
+ }
+ }
+
+ starcount = 0;
+
+ // read in each line of the file
+ while ( (fggets(fd, line, 256) != NULL) && (starcount < FG_MAX_STARS) ) {
+ front = line;
+
+ // printf(" Read line = %s", front);
+
+ // advance to first non-whitespace character
+ while ( (front[0] == ' ') || (front[0] == '\t') ) {
+ front++;
+ }
+
+ // printf(" Line length (after trimming) = %d\n", strlen(front));
+
+ if ( front[0] == '#' ) {
+ // comment
+ } else if ( strlen(front) <= 1 ) {
+ // blank line
+ } else {
+ // star data line
+
+ // get name
+ end = front;
+ while ( end[0] != ',' ) {
+ end++;
+ }
+ end[0] = '\0';
+ strcpy(name, front);
+ front = end;
+ front++;
+
+ sscanf(front, "%lf,%lf,%lf\n",
+ &right_ascension, &declination, &magnitude);
+ starlist[starcount].x = right_ascension;
+ starlist[starcount].y = declination;
+ starlist[starcount].z = magnitude;
+ starcount++;
+ }
+ }
+
min_magnitude[0] = 4.2;
min_magnitude[1] = 3.6;
min_magnitude[2] = 3.0;
min_magnitude[6] = 0.6;
min_magnitude[7] = 0.0;
-
+ // build the various star display lists
for ( i = 0; i < FG_STAR_LEVELS; i++ ) {
- fgPrintf( FG_ASTRO, FG_INFO,
- " Loading stars brighter than %.2f from %2\n",
- min_magnitude[i], path);
-
- if ( (fd = fgopen(path, "rb")) == NULL ) {
- strcpy(gzpath, path);
- strcat(gzpath, ".gz");
- if ( (fd = fgopen(gzpath, "rb")) == NULL ) {
- // Oops, lets not even try to continue. This is critical.
- fgPrintf( FG_ASTRO, FG_EXIT,
- "Cannot open star file: '%s'\n", path);
- }
- }
stars[i] = xglGenLists(1);
xglNewList( stars[i], GL_COMPILE );
xglBegin( GL_POINTS );
- /* read in each line of the file */
- while ( fggets(fd, line, 256) != NULL ) {
- front = line;
-
- /* printf(" Read line = %s", front); */
-
- /* advance to first non-whitespace character */
- while ( (front[0] == ' ') || (front[0] == '\t') ) {
- front++;
- }
-
- /* printf(" Line length (after trimming) = %d\n", strlen(front));*/
-
- if ( front[0] == '#' ) {
- /* comment */
- } else if ( strlen(front) <= 1 ) {
- /* blank line */
- } else {
- /* star data line */
-
- /* get name */
- end = front;
- while ( end[0] != ',' ) {
- end++;
- }
- end[0] = '\0';
- strcpy(name, front);
- front = end;
- front++;
-
- sscanf(front, "%lf,%lf,%lf\n",
- &right_ascension, &declination, &magnitude);
-
- /*
- if ( strcmp(name, "Betelgeuse") == 0 ) {
- printf(" *** Marking %s\n", name);
- ra_save = right_ascension;
- decl_save = declination;
- }
- */
-
- /*
- if ( strcmp(name, "Alnilam") == 0 ) {
- printf(" *** Marking %s\n", name);
- ra_save1 = right_ascension;
- decl_save1 = declination;
- }
- */
-
- if ( magnitude < min_magnitude[i] ) {
- /* scale magnitudes to (0.0 - 1.0) */
- magnitude = (0.0 - magnitude) / 5.0 + 1.0;
-
- /* scale magnitudes again so they look ok */
- if ( magnitude > 1.0 ) { magnitude = 1.0; }
- if ( magnitude < 0.0 ) { magnitude = 0.0; }
- /* magnitude =
- magnitude * 0.7 + (((FG_STAR_LEVELS - 1) - i) * 0.042);
- */
- magnitude = magnitude * 0.9 +
- (((FG_STAR_LEVELS - 1) - i) * 0.014);
- /* printf(" Found star: %d %s, %.3f %.3f %.3f\n", count,
- name, right_ascension, declination, magnitude); */
+ count = 0;
+
+ for ( j = 0; j < starcount; j++ ) {
+ magnitude = starlist[j].z;
+ // printf("magnitude = %.2f\n", magnitude);
+
+ if ( magnitude < min_magnitude[i] ) {
+ right_ascension = starlist[j].x;
+ declination = starlist[j].y;
+
+ count++;
+
+ /* scale magnitudes to (0.0 - 1.0) */
+ magnitude = (0.0 - magnitude) / 5.0 + 1.0;
+
+ /* scale magnitudes again so they look ok */
+ if ( magnitude > 1.0 ) { magnitude = 1.0; }
+ if ( magnitude < 0.0 ) { magnitude = 0.0; }
+ /* magnitude =
+ magnitude * 0.7 + (((FG_STAR_LEVELS - 1) - i) * 0.042);
+ */
+ magnitude = magnitude * 0.9 +
+ (((FG_STAR_LEVELS - 1) - i) * 0.014);
+ /* printf(" Found star: %d %s, %.3f %.3f %.3f\n", count,
+ name, right_ascension, declination, magnitude); */
- xglColor3f( magnitude, magnitude, magnitude );
- /*xglColor3f(0,0,0);*/
- xglVertex3f( 50000.0*cos(right_ascension)*cos(declination),
- 50000.0*sin(right_ascension)*cos(declination),
- 50000.0*sin(declination) );
- }
- } // valid line
-
+ xglColor3f( magnitude, magnitude, magnitude );
+ /*xglColor3f(0,0,0);*/
+ xglVertex3f( 50000.0*cos(right_ascension)*cos(declination),
+ 50000.0*sin(right_ascension)*cos(declination),
+ 50000.0*sin(declination) );
+ }
} /* while */
- fgclose(fd);
-
xglEnd();
/*
*/
xglEndList();
+
+ fgPrintf( FG_ASTRO, FG_INFO,
+ " Loading %d stars brighter than %.2f\n",
+ count, min_magnitude[i]);
}
return 1; // OK, we got here because initialization worked.
/* $Log$
-/* Revision 1.9 1998/08/06 12:45:20 curt
-/* Modified to bring in stars in 8 increments based on magnitude, not number
-/* of stars.
+/* Revision 1.10 1998/08/10 20:33:09 curt
+/* Rewrote star loading and rendering to:
+/* 1. significantly improve load speed
+/* 2. transition from no stars to stars through eight stages.
/*
+ * Revision 1.9 1998/08/06 12:45:20 curt
+ * Modified to bring in stars in 8 increments based on magnitude, not number
+ * of stars.
+ *
* Revision 1.8 1998/07/13 21:00:10 curt
* Wrote access functions for current fgOPTIONS.
*
projects / flightgear.git / commitdiff