Working on getting stars right.
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curt
parent
b830d97782
commit
ad22cbffca
5 changed files with 114 additions and 26 deletions
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@ -154,7 +154,7 @@ static void fgUpdateViewParams() {
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/* Tell GL we are about to modify the projection parameters */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0, 1.0/win_ratio, 1.0, 200000.0);
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gluPerspective(100.0, 1.0/win_ratio, 1.0, 200000.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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@ -555,9 +555,12 @@ int main( int argc, char *argv[] ) {
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/* $Log$
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/* Revision 1.13 1997/09/04 02:17:34 curt
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/* Shufflin' stuff.
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/* Revision 1.14 1997/09/05 01:35:53 curt
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/* Working on getting stars right.
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/*
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* Revision 1.13 1997/09/04 02:17:34 curt
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* Shufflin' stuff.
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*
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* Revision 1.12 1997/08/27 21:32:24 curt
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* Restructured view calculation code. Added stars.
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*
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@ -80,7 +80,7 @@ void fgSceneryUpdate(double lon, double lat, double elev) {
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/* Render out the current scene */
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void fgSceneryRender() {
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glPushMatrix();
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glCallList(mesh_hack);
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/* glCallList(mesh_hack); */
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glPopMatrix();
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fgStarsRender();
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@ -88,9 +88,12 @@ void fgSceneryRender() {
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/* $Log$
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/* Revision 1.17 1997/08/29 17:55:27 curt
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/* Worked on properly aligning the stars.
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/* Revision 1.18 1997/09/05 01:35:59 curt
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/* Working on getting stars right.
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/*
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* Revision 1.17 1997/08/29 17:55:27 curt
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* Worked on properly aligning the stars.
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*
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* Revision 1.16 1997/08/27 21:32:29 curt
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* Restructured view calculation code. Added stars.
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*
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103
Scenery/stars.c
103
Scenery/stars.c
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@ -57,8 +57,11 @@ void fgStarsInit() {
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struct GENERAL *g;
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char path[1024];
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char line[256], name[256];
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char *tmp_ptr;
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char *front, *end;
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double right_ascension, declination, magnitude;
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double ra_save, decl_save;
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double ra_save1, decl_save1;
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double ra_save2, decl_save2;
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GLfloat mag[4] = {0.0, 0.0, 0.0, 1.0};
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int count;
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@ -84,36 +87,105 @@ void fgStarsInit() {
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/* read in each line of the file */
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count = 0;
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while ( (fgets(line, 256, fd) != NULL) && (count < FG_MAX_STARS) ) {
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tmp_ptr = line;
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front = line;
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/* printf("Read line = %s", front); */
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/* advance to first non-whitespace character */
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while ( (tmp_ptr[0] == ' ') || (tmp_ptr[0] == '\t') ) {
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tmp_ptr++;
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while ( (front[0] == ' ') || (front[0] == '\t') ) {
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front++;
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}
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if ( tmp_ptr[0] == '#' ) {
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/* printf("Line length (after trimming) = %d\n", strlen(front)); */
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if ( front[0] == '#' ) {
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/* comment */
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} else if ( strlen(tmp_ptr) == 0 ) {
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} else if ( strlen(front) <= 1 ) {
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/* blank line */
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} else {
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/* star data line */
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fscanf(fd, "%s %lf %lf %lf\n",
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name, &right_ascension, &declination, &magnitude);
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/* printf("Found star: %d %s, %.3f %.3f %.3f\n", count,
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name, right_ascension, declination, magnitude); */
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count++;
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/* get name */
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end = front;
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while ( end[0] != ',' ) {
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end++;
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}
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end[0] = '\0';
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strcpy(name, front);
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front = end;
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front++;
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sscanf(front, "%lf,%lf,%lf\n",
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&right_ascension, &declination, &magnitude);
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if ( strcmp(name, "Deneb") == 0 ) {
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printf("\n*** Marking %s\n\n", name);
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ra_save = right_ascension;
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decl_save = declination;
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}
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if ( strcmp(name, "Alderamin") == 0 ) {
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printf("\n*** Marking %s\n\n", name);
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ra_save1 = right_ascension;
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decl_save1 = declination;
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}
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/* scale magnitudes to (0.0 - 1.0) */
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magnitude = (-1.46 - magnitude) / 10.0 + 1.0;
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/* scale magnitudes again so they look ok */
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magnitude = magnitude * 0.8 + 0.2;
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mag[0] = mag[1] = mag[2] = magnitude;
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printf("Found star: %d %s, %.3f %.3f %.3f\n", count,
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name, right_ascension, declination, magnitude);
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glColor3f( mag[0], mag[1], mag[2] );
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glVertex3f( 190000.0 * sin(right_ascension) * cos(declination),
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190000.0 * cos(right_ascension) * cos(declination),
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190000.0 * sin(declination) );
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count++;
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} /* if valid line */
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} /* while */
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fclose(fd);
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glEnd();
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glBegin(GL_LINE_LOOP);
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glColor3f(1.0, 0.0, 0.0);
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glVertex3f( 190000.0 * sin(ra_save-0.2) * cos(decl_save-0.2),
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190000.0 * cos(ra_save-0.2) * cos(decl_save-0.2),
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190000.0 * sin(decl_save-0.2) );
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glVertex3f( 190000.0 * sin(ra_save+0.2) * cos(decl_save-0.2),
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190000.0 * cos(ra_save+0.2) * cos(decl_save-0.2),
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190000.0 * sin(decl_save-0.2) );
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glVertex3f( 190000.0 * sin(ra_save+0.2) * cos(decl_save+0.2),
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190000.0 * cos(ra_save+0.2) * cos(decl_save+0.2),
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190000.0 * sin(decl_save+0.2) );
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glVertex3f( 190000.0 * sin(ra_save-0.2) * cos(decl_save+0.2),
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190000.0 * cos(ra_save-0.2) * cos(decl_save+0.2),
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190000.0 * sin(decl_save+0.2) );
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glEnd();
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glBegin(GL_LINE_LOOP);
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glColor3f(0.0, 1.0, 0.0);
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glVertex3f( 190000.0 * sin(ra_save1-0.2) * cos(decl_save1-0.2),
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190000.0 * cos(ra_save1-0.2) * cos(decl_save1-0.2),
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190000.0 * sin(decl_save1-0.2) );
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glVertex3f( 190000.0 * sin(ra_save1+0.2) * cos(decl_save1-0.2),
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190000.0 * cos(ra_save1+0.2) * cos(decl_save1-0.2),
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190000.0 * sin(decl_save1-0.2) );
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glVertex3f( 190000.0 * sin(ra_save1+0.2) * cos(decl_save1+0.2),
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190000.0 * cos(ra_save1+0.2) * cos(decl_save1+0.2),
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190000.0 * sin(decl_save1+0.2) );
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glVertex3f( 190000.0 * sin(ra_save1-0.2) * cos(decl_save1+0.2),
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190000.0 * cos(ra_save1-0.2) * cos(decl_save1+0.2),
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190000.0 * sin(decl_save1+0.2) );
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glEnd();
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glEndList();
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}
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@ -148,9 +220,12 @@ void fgStarsRender() {
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/* $Log$
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/* Revision 1.4 1997/09/04 02:17:38 curt
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/* Shufflin' stuff.
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/* Revision 1.5 1997/09/05 01:35:59 curt
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/* Working on getting stars right.
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/*
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* Revision 1.4 1997/09/04 02:17:38 curt
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* Shufflin' stuff.
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*
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* Revision 1.3 1997/08/29 17:55:28 curt
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* Worked on properly aligning the stars.
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*
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@ -28,8 +28,8 @@
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#define STARS_H
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#define FG_MAX_STARS 1000
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#define FG_MAX_STARS 500
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#define FG_MIN_STAR_MAG 0.738750 /* magnitude of weakest star we'll display */
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/* Initialize the Star Management Subsystem */
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void fgStarsInit();
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@ -42,9 +42,12 @@ void fgStarsRender();
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/* $Log$
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/* Revision 1.3 1997/08/29 17:55:28 curt
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/* Worked on properly aligning the stars.
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/* Revision 1.4 1997/09/05 01:36:00 curt
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/* Working on getting stars right.
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/*
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* Revision 1.3 1997/08/29 17:55:28 curt
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* Worked on properly aligning the stars.
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*
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* Revision 1.2 1997/08/27 21:32:30 curt
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* Restructured view calculation code. Added stars.
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*
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@ -271,6 +271,7 @@ void fgUpdateSunPos(struct fgCartesianPoint scenery_center) {
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v = ¤t_view;
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time_warp += 200; /* increase this to make the world spin real fast */
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time_warp = 3600*10; /* increase this to make the world spin real fast */
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fgSunPosition(time(NULL) + time_warp, &t->sun_lon, &sun_gd_lat);
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@ -303,9 +304,12 @@ void fgUpdateSunPos(struct fgCartesianPoint scenery_center) {
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/* $Log$
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/* Revision 1.7 1997/09/04 02:17:40 curt
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/* Shufflin' stuff.
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/* Revision 1.8 1997/09/05 01:36:04 curt
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/* Working on getting stars right.
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/*
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* Revision 1.7 1997/09/04 02:17:40 curt
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* Shufflin' stuff.
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*
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* Revision 1.6 1997/08/27 03:30:37 curt
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* Changed naming scheme of basic shared structures.
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*
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