#include <time.h>
#include <GL/glut.h>
+#include "../XGL/xgl.h"
+#include "orbits.h"
+#include "planets.h"
#include "stars.h"
-#include "../constants.h"
-#include "../general.h"
-
-#include "../GLUT/views.h"
+#include "../Include/constants.h"
+#include "../Include/general.h"
#include "../Aircraft/aircraft.h"
+#include "../Main/views.h"
+#include "../Time/fg_time.h"
#define EpochStart (631065600)
#define DaysSinceEpoch(secs) (((secs)-EpochStart)*(1.0/(24*3600)))
-static GLint stars;
+/* Define four structures, each with varying amounts of stars */
+/* static */ GLint stars[FG_STAR_LEVELS];
/* Initialize the Star Management Subsystem */
void fgStarsInit() {
FILE *fd;
- struct GENERAL *g;
+ struct fgGENERAL *g;
+ struct CelestialCoord pltPos;
char path[1024];
char line[256], name[256];
- char *tmp_ptr;
+ char *front, *end;
double right_ascension, declination, magnitude;
- GLfloat mag[4] = {0.0, 0.0, 0.0, 1.0};
- int count;
+ double ra_save, decl_save;
+ double ra_save1, decl_save1;
+ int count, i, j, max_stars;
g = &general;
strcat(path, "/Scenery/");
strcat(path, "Stars.dat");
- printf("Loading Stars: %s\n", path);
-
- if ( (fd = fopen(path, "r")) == NULL ) {
- printf("Cannot open star file: '%s'\n", path);
- return;
- }
+ max_stars = FG_MAX_STARS;
- stars = glGenLists(1);
- glNewList( stars, GL_COMPILE );
- glBegin( GL_POINTS );
+ for ( i = 0; i < FG_STAR_LEVELS; i++ ) {
+ printf("Loading %d Stars: %s\n", max_stars, path);
- /* read in each line of the file */
- count = 0;
- while ( (fgets(line, 256, fd) != NULL) && (count < FG_MAX_STARS) ) {
- tmp_ptr = line;
+ if ( (fd = fopen(path, "r")) == NULL ) {
+ printf("Cannot open star file: '%s'\n", path);
+ return;
+ }
- /* advance to first non-whitespace character */
- while ( (tmp_ptr[0] == ' ') || (tmp_ptr[0] == '\t') ) {
- tmp_ptr++;
+ stars[i] = xglGenLists(1);
+ xglNewList( stars[i], GL_COMPILE );
+ xglBegin( GL_POINTS );
+
+ /* read in each line of the file */
+ count = 0;
+ while ( (fgets(line, 256, fd) != NULL) && (count < 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);
+
+ /*
+ 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;
+ }
+ */
+
+ /* 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) * 0.1);
+ /* printf("Found star: %d %s, %.3f %.3f %.3f\n", count,
+ name, right_ascension, declination, magnitude); */
+
+ xglColor3f( magnitude, magnitude, magnitude );
+ /*xglColor3f(0,0,0);*/
+ xglVertex3f( 190000.0 * cos(right_ascension) * cos(declination),
+ 190000.0 * sin(right_ascension) * cos(declination),
+ 190000.0 * sin(declination) );
+
+ count++;
+ } /* if valid line */
+
+ } /* while */
+
+ fclose(fd);
+
+ /* Add the planets to all four display lists */
+ for ( j = 2; j < 9; j++ ) {
+ pltPos = fgCalculatePlanet(pltOrbElements[j],
+ pltOrbElements[0], cur_time_params);
+ printf("Planet found at %f (ra), %f (dec)\n",
+ pltPos.RightAscension, pltPos.Declination);
+ /* give the planets a temporary color, for testing purposes */
+ xglColor3f( 1.0, 0.0, 0.0);
+ xglVertex3f( 190000.0 * cos(pltPos.RightAscension) *
+ cos(pltPos.Declination),
+ 190000.0 * sin(pltPos.RightAscension) *
+ cos(pltPos.Declination),
+ 190000.0 * sin(pltPos.Declination) );
}
-
- if ( tmp_ptr[0] == '#' ) {
- /* comment */
- } else if ( strlen(tmp_ptr) == 0 ) {
- /* blank line */
- } else {
- /* star data line */
- fscanf(fd, "%s %lf %lf %lf\n",
- name, &right_ascension, &declination, &magnitude);
- /* printf("Found star: %d %s, %.3f %.3f %.3f\n", count,
- name, right_ascension, declination, magnitude); */
- count++;
- magnitude = magnitude * 0.8 + 0.2;
- mag[0] = mag[1] = mag[2] = magnitude;
- glColor3f( mag[0], mag[1], mag[2] );
- glVertex3f( 190000.0 * sin(right_ascension) * cos(declination),
- 190000.0 * cos(right_ascension) * cos(declination),
- 190000.0 * sin(declination) );
-
- } /* if valid line */
-
- } /* while */
-
- glEnd();
- glEndList();
+ xglEnd();
+
+ /*
+ xglBegin(GL_LINE_LOOP);
+ xglColor3f(1.0, 0.0, 0.0);
+ xglVertex3f( 190000.0 * cos(ra_save-0.2) * cos(decl_save-0.2),
+ 190000.0 * sin(ra_save-0.2) * cos(decl_save-0.2),
+ 190000.0 * sin(decl_save-0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save+0.2) * cos(decl_save-0.2),
+ 190000.0 * sin(ra_save+0.2) * cos(decl_save-0.2),
+ 190000.0 * sin(decl_save-0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save+0.2) * cos(decl_save+0.2),
+ 190000.0 * sin(ra_save+0.2) * cos(decl_save+0.2),
+ 190000.0 * sin(decl_save+0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save-0.2) * cos(decl_save+0.2),
+ 190000.0 * sin(ra_save-0.2) * cos(decl_save+0.2),
+ 190000.0 * sin(decl_save+0.2) );
+ xglEnd();
+ */
+
+ /*
+ xglBegin(GL_LINE_LOOP);
+ xglColor3f(0.0, 1.0, 0.0);
+ xglVertex3f( 190000.0 * cos(ra_save1-0.2) * cos(decl_save1-0.2),
+ 190000.0 * sin(ra_save1-0.2) * cos(decl_save1-0.2),
+ 190000.0 * sin(decl_save1-0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save1+0.2) * cos(decl_save1-0.2),
+ 190000.0 * sin(ra_save1+0.2) * cos(decl_save1-0.2),
+ 190000.0 * sin(decl_save1-0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save1+0.2) * cos(decl_save1+0.2),
+ 190000.0 * sin(ra_save1+0.2) * cos(decl_save1+0.2),
+ 190000.0 * sin(decl_save1+0.2) );
+ xglVertex3f( 190000.0 * cos(ra_save1-0.2) * cos(decl_save1+0.2),
+ 190000.0 * sin(ra_save1-0.2) * cos(decl_save1+0.2),
+ 190000.0 * sin(decl_save1+0.2) );
+ xglEnd();
+ */
+
+ xglEndList();
+
+ max_stars /= 2;
+ }
}
/* Draw the Stars */
void fgStarsRender() {
- struct FLIGHT *f;
- struct VIEW *v;
- double angle;
+ struct fgFLIGHT *f;
+ struct fgVIEW *v;
+ struct fgLIGHT *l;
+ struct fgTIME *t;
+ int i;
f = ¤t_aircraft.flight;
+ l = &cur_light_params;
+ t = &cur_time_params;
v = ¤t_view;
- printf("RENDERING STARS\n");
-
- glDisable( GL_FOG );
- glDisable( GL_LIGHTING );
- glPushMatrix();
+ /* FG_PI_2 + 0.1 is about 6 degrees after sundown and before sunrise */
- /* set lighting parameters for stars */
- /* amb[0] = amb[1] = amb[2] = 1.0;
- diff[0] = diff[1] = diff[2] = 1.0;
- glLightfv(GL_LIGHT0, GL_AMBIENT, amb );
- glLightfv(GL_LIGHT0, GL_DIFFUSE, diff ); */
+ /* t->sun_angle = 3.0; */ /* to force stars to be drawn (for testing) */
- glTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
-
- angle = FG_2PI * fmod(DaysSinceEpoch(time(NULL)), 1.0);
- glRotatef( -angle * RAD_TO_DEG, 0.0, 0.0, 1.0 );
- printf("Rotating stars by %.2f\n", -angle * RAD_TO_DEG);
+ /* render the stars */
+ if ( l->sun_angle > (FG_PI_2 + 5 * DEG_TO_RAD ) ) {
+ /* determine which star structure to draw */
+ if ( l->sun_angle > (FG_PI_2 + 7.25 * DEG_TO_RAD ) ) {
+ i = 0;
+ } else if ( l->sun_angle > (FG_PI_2 + 6.50 * DEG_TO_RAD ) ) {
+ i = 1;
+ } else if ( l->sun_angle > (FG_PI_2 + 5.75 * DEG_TO_RAD ) ) {
+ i = 2;
+ } else {
+ i = 3;
+ }
- glCallList(stars);
+ printf("RENDERING STARS = %d (night)\n", i);
- glPopMatrix();
- glEnable( GL_LIGHTING );
- glEnable( GL_FOG );
+ xglDisable( GL_LIGHTING );
+ xglCallList(stars[i]);
+ xglEnable( GL_LIGHTING );
+ } else {
+ printf("not RENDERING STARS (day)\n");
+ }
}
/* $Log$
-/* Revision 1.3 1997/08/29 17:55:28 curt
-/* Worked on properly aligning the stars.
+/* Revision 1.20 1997/12/15 23:55:03 curt
+/* Add xgl wrappers for debugging.
+/* Generate terrain normals on the fly.
/*
+ * Revision 1.19 1997/12/12 19:53:00 curt
+ * Working on lightling and material properties.
+ *
+ * Revision 1.18 1997/12/10 22:37:52 curt
+ * Prepended "fg" on the name of all global structures that didn't have it yet.
+ * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
+ *
+ * Revision 1.17 1997/12/09 04:25:33 curt
+ * Working on adding a global lighting params structure.
+ *
+ * Revision 1.16 1997/11/25 19:25:38 curt
+ * Changes to integrate Durk's moon/sun code updates + clean up.
+ *
+ * Revision 1.15 1997/10/30 12:38:45 curt
+ * Working on new scenery subsystem.
+ *
+ * Revision 1.14 1997/10/28 21:00:22 curt
+ * Changing to new terrain format.
+ *
+ * Revision 1.13 1997/10/25 03:18:28 curt
+ * Incorporated sun, moon, and planet position and rendering code contributed
+ * by Durk Talsma.
+ *
+ * Revision 1.12 1997/09/23 00:29:43 curt
+ * Tweaks to get things to compile with gcc-win32.
+ *
+ * Revision 1.11 1997/09/22 14:44:21 curt
+ * Continuing to try to align stars correctly.
+ *
+ * Revision 1.10 1997/09/20 03:34:32 curt
+ * Still trying to get those durned stars aligned properly.
+ *
+ * Revision 1.9 1997/09/18 16:20:09 curt
+ * At dusk/dawn add/remove stars in stages.
+ *
+ * Revision 1.8 1997/09/16 22:14:52 curt
+ * Tweaked time of day lighting equations. Don't draw stars during the day.
+ *
+ * Revision 1.7 1997/09/16 15:50:31 curt
+ * Working on star alignment and time issues.
+ *
+ * Revision 1.6 1997/09/05 14:17:31 curt
+ * More tweaking with stars.
+ *
+ * Revision 1.5 1997/09/05 01:35:59 curt
+ * Working on getting stars right.
+ *
+ * Revision 1.4 1997/09/04 02:17:38 curt
+ * Shufflin' stuff.
+ *
+ * Revision 1.3 1997/08/29 17:55:28 curt
+ * Worked on properly aligning the stars.
+ *
* Revision 1.2 1997/08/27 21:32:30 curt
* Restructured view calculation code. Added stars.
*
projects / flightgear.git / blobdiff