-// stars.cxx -- data structures and routines for managing and rendering stars.
+// stars.cxx -- manage star data
//
-// Written by Curtis Olson, started August 1997.
+// Written by Curtis Olson, started March 2000.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@me.umn.edu
+// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
-//*************************************************************************/
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <simgear/debug/logstream.hxx>
+#include <simgear/misc/fgstream.hxx>
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
+#include "stars.hxx"
-#include "Include/compiler.h"
-#ifdef FG_HAVE_STD_INCLUDES
-# include <cmath>
-# include <cstdio>
-# include <cstring>
-# include <ctime>
-#else
-# include <math.h>
-# include <stdio.h>
-# include <string.h>
-# include <time.h>
+#ifdef _MSC_VER
+ FG_USING_STD(getline);
#endif
-#include <string>
-
-#include <GL/glut.h>
-#include <XGL/xgl.h>
-
-#include <Aircraft/aircraft.hxx>
-#include <Debug/logstream.hxx>
-#include <Include/fg_constants.h>
-#include <Misc/fgpath.hxx>
-#include <Misc/fgstream.hxx>
-#include <Misc/stopwatch.hxx>
-#include <Main/options.hxx>
-#include <Main/views.hxx>
-#include <Time/fg_time.hxx>
-#include "Misc/stopwatch.hxx"
+// Constructor
+FGStars::FGStars() {
+}
-#include "stars.hxx"
+FGStars::FGStars( FGPath path ) {
+ data_path = FGPath( path );
+ load();
+}
-// FG_USING_STD(getline);
-#define EpochStart (631065600)
-#define DaysSinceEpoch(secs) (((secs)-EpochStart)*(1.0/(24*3600)))
-#define FG_MAX_STARS 3500
+// Destructor
+FGStars::~FGStars() {
+}
-// Define four structures, each with varying amounts of stars
-static GLint stars[FG_STAR_LEVELS];
+bool FGStars::load() {
-// Initialize the Star Management Subsystem
-int fgStarsInit( void ) {
// -dw- avoid local data > 32k error by dynamic allocation of the
// array, problem for some compilers
- Point3D *starlist = new Point3D[FG_MAX_STARS];
- // struct CelestialCoord pltPos;
- double right_ascension, declination, magnitude;
- double min_magnitude[FG_STAR_LEVELS];
- // double ra_save, decl_save;
- // double ra_save1, decl_save1;
- int i, j, starcount, count;
+ stars = new sgdVec3[FG_MAX_STARS];
- FG_LOG( FG_ASTRO, FG_INFO, "Initializing stars" );
+ // build the full path name to the stars data base file
+ data_path.append( "stars" );
+ FG_LOG( FG_ASTRO, FG_INFO, " Loading stars from " << data_path.str() );
- if ( FG_STAR_LEVELS < 4 ) {
- FG_LOG( FG_ASTRO, FG_ALERT, "Big whups in stars.cxx" );
+ fg_gzifstream in( data_path.str() );
+ if ( ! in.is_open() ) {
+ FG_LOG( FG_ASTRO, FG_ALERT, "Cannot open star file: "
+ << data_path.str() );
exit(-1);
}
- // build the full path name to the stars data base file
- FGPath path ( current_options.get_fg_root() );
- path.append( "Astro/stars" );
- FG_LOG( FG_ASTRO, FG_INFO, " Loading stars from " << path.str() );
+ double ra, dec, mag;
+ char c;
+ string name;
- fg_gzifstream in( path.str() );
- if ( ! in ) {
- FG_LOG( FG_ASTRO, FG_ALERT, "Cannot open star file: " << path.str() );
- exit(-1);
- }
-
- starcount = 0;
-
- StopWatch timer;
- timer.start();
+ nstars = 0;
// read in each line of the file
- while ( ! in.eof() && starcount < FG_MAX_STARS )
- {
+ while ( ! in.eof() && nstars < FG_MAX_STARS ) {
in >> skipcomment;
- string name;
- getline( in, name, ',' );
- in >> starlist[starcount];
- ++starcount;
- }
-
- timer.stop();
- FG_LOG( FG_ASTRO, FG_INFO,
- "Loaded " << starcount << " stars in "
- << timer.elapsedSeconds() << " seconds" );
-
- min_magnitude[0] = 4.2;
- min_magnitude[1] = 3.6;
- min_magnitude[2] = 3.0;
- min_magnitude[3] = 2.4;
- min_magnitude[4] = 1.8;
- min_magnitude[5] = 1.2;
- min_magnitude[6] = 0.6;
- min_magnitude[7] = 0.0;
-
- // build the various star display lists
- for ( i = 0; i < FG_STAR_LEVELS; i++ ) {
- stars[i] = xglGenLists(1);
- xglNewList( stars[i], GL_COMPILE );
- xglBegin( GL_POINTS );
+ getline( in, name, ',' );
+ // cout << " data = " << name << endl;
- count = 0;
+ // read name and first comma
+ while ( in.get(c) ) {
+ if ( (c != ' ') && (c != ',') ) {
+ // push back on the stream
+ in.putback(c);
+ break;
+ }
+ }
- for ( j = 0; j < starcount; j++ ) {
- magnitude = starlist[j].z();
- // printf("magnitude = %.2f\n", magnitude);
+ in >> ra;
- if ( magnitude < min_magnitude[i] ) {
- right_ascension = starlist[j].x();
- declination = starlist[j].y();
+ // read past optional comma
+ while ( in.get(c) ) {
+ if ( (c != ' ') && (c != ',') ) {
+ // push back on the stream
+ in.putback(c);
+ break;
+ }
+ }
- count++;
+ in >> dec;
- // 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) );
+ // read past optional comma
+ while ( in.get(c) ) {
+ if ( (c != ' ') && (c != ',') ) {
+ // push back on the stream
+ in.putback(c);
+ break;
}
- } // while
+ }
- xglEnd();
+ in >> mag;
- /*
- xglBegin(GL_LINE_LOOP);
- xglColor3f(1.0, 0.0, 0.0);
- xglVertex3f( 50000.0 * cos(ra_save-0.2) * cos(decl_save-0.2),
- 50000.0 * sin(ra_save-0.2) * cos(decl_save-0.2),
- 50000.0 * sin(decl_save-0.2) );
- xglVertex3f( 50000.0 * cos(ra_save+0.2) * cos(decl_save-0.2),
- 50000.0 * sin(ra_save+0.2) * cos(decl_save-0.2),
- 50000.0 * sin(decl_save-0.2) );
- xglVertex3f( 50000.0 * cos(ra_save+0.2) * cos(decl_save+0.2),
- 50000.0 * sin(ra_save+0.2) * cos(decl_save+0.2),
- 50000.0 * sin(decl_save+0.2) );
- xglVertex3f( 50000.0 * cos(ra_save-0.2) * cos(decl_save+0.2),
- 50000.0 * sin(ra_save-0.2) * cos(decl_save+0.2),
- 50000.0 * sin(decl_save+0.2) );
- xglEnd();
- */
+ // cout << " star data = " << ra << " " << dec << " " << mag << endl;
- /*
- xglBegin(GL_LINE_LOOP);
- xglColor3f(0.0, 1.0, 0.0);
- xglVertex3f( 50000.0 * cos(ra_save1-0.2) * cos(decl_save1-0.2),
- 50000.0 * sin(ra_save1-0.2) * cos(decl_save1-0.2),
- 50000.0 * sin(decl_save1-0.2) );
- xglVertex3f( 50000.0 * cos(ra_save1+0.2) * cos(decl_save1-0.2),
- 50000.0 * sin(ra_save1+0.2) * cos(decl_save1-0.2),
- 50000.0 * sin(decl_save1-0.2) );
- xglVertex3f( 50000.0 * cos(ra_save1+0.2) * cos(decl_save1+0.2),
- 50000.0 * sin(ra_save1+0.2) * cos(decl_save1+0.2),
- 50000.0 * sin(decl_save1+0.2) );
- xglVertex3f( 50000.0 * cos(ra_save1-0.2) * cos(decl_save1+0.2),
- 50000.0 * sin(ra_save1-0.2) * cos(decl_save1+0.2),
- 50000.0 * sin(decl_save1+0.2) );
- xglEnd();
- */
+ sgdSetVec3( stars[nstars], ra, dec, mag );
- xglEndList();
-
- FG_LOG( FG_ASTRO, FG_INFO,
- " Loading " << count << " stars brighter than "
- << min_magnitude[i] );
+ ++nstars;
}
- return 1; // OK, we got here because initialization worked.
-}
-
-
-// Draw the Stars
-void fgStarsRender( void ) {
- FGInterface *f;
- fgLIGHT *l;
- FGTime *t;
- int i;
-
- f = current_aircraft.fdm_state;
- l = &cur_light_params;
- t = FGTime::cur_time_params;
+ FG_LOG( FG_ASTRO, FG_INFO, " Loaded " << nstars << " stars" );
- // FG_PI_2 + 0.1 is about 6 degrees after sundown and before sunrise
-
- // t->sun_angle = 3.0; // to force stars to be drawn (for testing)
-
- // 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 + 10.0 * DEG_TO_RAD ) ) {
- i = 0;
- } else if ( l->sun_angle > (FG_PI_2 + 8.8 * DEG_TO_RAD ) ) {
- i = 1;
- } else if ( l->sun_angle > (FG_PI_2 + 7.5 * DEG_TO_RAD ) ) {
- i = 2;
- } else if ( l->sun_angle > (FG_PI_2 + 7.0 * DEG_TO_RAD ) ) {
- i = 3;
- } else if ( l->sun_angle > (FG_PI_2 + 6.5 * DEG_TO_RAD ) ) {
- i = 4;
- } else if ( l->sun_angle > (FG_PI_2 + 6.0 * DEG_TO_RAD ) ) {
- i = 5;
- } else if ( l->sun_angle > (FG_PI_2 + 5.5 * DEG_TO_RAD ) ) {
- i = 6;
- } else {
- i = 7;
- }
-
- // printf("RENDERING STARS = %d (night)\n", i);
-
- xglCallList(stars[i]);
- } else {
- // printf("not RENDERING STARS (day)\n");
- }
+ return true;
}
-
-
projects / simgear.git / blobdiff