From 1984ae1583d160c46e026806352d45dad3d41df6 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Thu, 16 Mar 2000 22:00:53 +0000
Subject: [PATCH] Removed solarsystem.* replaced mostly with ephemeris.* which
 is similar but not rendering oriented. Added star database management class.

---
 simgear/ephemeris/Makefile.am     |   1 -
 simgear/ephemeris/ephemeris.cxx   |   4 +-
 simgear/ephemeris/ephemeris.hxx   |  11 +-
 simgear/ephemeris/solarsystem.cxx | 221 ------------------------
 simgear/ephemeris/solarsystem.hxx |  91 ----------
 simgear/ephemeris/stars.cxx       | 274 +++++++-----------------------
 simgear/ephemeris/stars.hxx       |  42 +++--
 7 files changed, 101 insertions(+), 543 deletions(-)
 delete mode 100644 simgear/ephemeris/solarsystem.cxx
 delete mode 100644 simgear/ephemeris/solarsystem.hxx

diff --git a/simgear/ephemeris/Makefile.am b/simgear/ephemeris/Makefile.am
index 3c67a015..1ef7ce24 100644
--- a/simgear/ephemeris/Makefile.am
+++ b/simgear/ephemeris/Makefile.am
@@ -10,7 +10,6 @@ libAstro_a_SOURCES = \
 	neptune.cxx neptune.hxx \
 	pluto.hxx \
 	saturn.cxx saturn.hxx \
-	solarsystem.cxx solarsystem.hxx \
 	star.cxx star.hxx \
 	stars.cxx stars.hxx \
 	uranus.cxx uranus.hxx \
diff --git a/simgear/ephemeris/ephemeris.cxx b/simgear/ephemeris/ephemeris.cxx
index 2f96b9bc..957556f9 100644
--- a/simgear/ephemeris/ephemeris.cxx
+++ b/simgear/ephemeris/ephemeris.cxx
@@ -26,7 +26,7 @@
 
 
 // Constructor
-FGEphemeris::FGEphemeris( void ) {
+FGEphemeris::FGEphemeris( const string &path ) {
     our_sun = new Star;
     moon = new Moon;
     mercury = new Mercury;
@@ -36,6 +36,7 @@ FGEphemeris::FGEphemeris( void ) {
     saturn = new Saturn;
     uranus = new Uranus;
     neptune = new Neptune;
+    stars = new FGStars( FGPath(path) );
 }
 
 
@@ -50,6 +51,7 @@ FGEphemeris::~FGEphemeris( void ) {
     delete saturn;
     delete uranus;
     delete neptune;
+    delete stars;
 }
 
 
diff --git a/simgear/ephemeris/ephemeris.hxx b/simgear/ephemeris/ephemeris.hxx
index 7b9a7c42..74594e3b 100644
--- a/simgear/ephemeris/ephemeris.hxx
+++ b/simgear/ephemeris/ephemeris.hxx
@@ -39,6 +39,7 @@
 #include "saturn.hxx"
 #include "uranus.hxx"
 #include "neptune.hxx"
+#include "stars.hxx"
 
 
 class FGEphemeris {
@@ -59,11 +60,13 @@ class FGEphemeris {
     // planets[i][2] = Magnitude
     int nplanets;
     sgdVec3 planets[7];
-    
+
+    FGStars *stars;
+
 public:
 
     // Constructor
-    FGEphemeris( void );
+    FGEphemeris( const string &path );
 
     // Destructor
     ~FGEphemeris( void );
@@ -93,6 +96,10 @@ public:
     // planets
     inline int getNumPlanets() const { return nplanets; }
     inline sgdVec3 *getPlanets() { return planets; }
+
+    // planets
+    inline int getNumStars() const { return stars->getNumStars(); }
+    inline sgdVec3 *getStars() { return stars->getStars(); }
 };
 
 
diff --git a/simgear/ephemeris/solarsystem.cxx b/simgear/ephemeris/solarsystem.cxx
deleted file mode 100644
index 001f7958..00000000
--- a/simgear/ephemeris/solarsystem.cxx
+++ /dev/null
@@ -1,221 +0,0 @@
-/**************************************************************************
- * solarsystem.cxx
- * Written by Durk Talsma. Originally started October 1997, for distribution  
- * with the FlightGear project. Version 2 was written in August and 
- * September 1998. This code is based upon algorithms and data kindly 
- * provided by Mr. Paul Schlyter. (pausch@saaf.se). 
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id$
- **************************************************************************/
-
-#ifdef HAVE_CONFIG_H
-#  include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-#  include <windows.h>
-#endif
-
-#ifdef __BORLANDC__
-#  define exception c_exception
-#endif
-#include <math.h>
-
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
-#include <simgear/debug/logstream.hxx>
-
-#include <Time/sunpos.hxx>
-#include <Time/moonpos.hxx>
-#include "solarsystem.hxx"
-
-/***************************************************************************
- * default constructor for class  SolarSystem:   
- * or course there can only be one way to create an entire solar system -:) )
- * the FGTime argument is needed to properly initialize the the current orbital
- * elements
- *************************************************************************/
-SolarSystem::SolarSystem(FGTime *t)
-{
-  if (theSolarSystem)
-    {
-      FG_LOG( FG_GENERAL, FG_ALERT, "Error: only one solarsystem allowed" );
-      exit(-1);
-    }
-  theSolarSystem = this;
-  ourSun     = new Star(t);   
-  earthsMoon = new Moon(t);
-  mercury    = new Mercury(t);
-  venus      = new Venus(t);
-  mars       = new Mars(t);
-  jupiter    = new Jupiter(t);
-  saturn     = new Saturn(t);
-  uranus     = new Uranus(t);
-  neptune    = new Neptune(t);
-
-  displayList = 0;
-};
-
-/**************************************************************************
- * the destructor for class SolarSystem;
- **************************************************************************/
-SolarSystem::~SolarSystem()
-{
-  delete ourSun;
-  delete earthsMoon;
-  delete mercury;
-  delete venus;
-  delete mars;
-  delete jupiter;
-  delete saturn;
-  delete uranus;
-  delete neptune;
-}
-/****************************************************************************
- * void SolarSystem::rebuild()
- *
- * this member function updates the positions for the sun, moon, and planets,
- * and then rebuilds the display list. 
- *
- * arguments: none
- * return value: none
- ***************************************************************************/
-void SolarSystem::rebuild()
-{
-  //fgLIGHT *l = &cur_light_params;
-  FGTime *t = FGTime::cur_time_params;  
-  //float x, y, z;
-  //double sun_angle;
-  double ra, dec;
-  //double x_2, x_4, x_8, x_10;*/
-  double magnitude;
-  //GLfloat ambient;
-  //GLfloat amb[4];
-
-#if 0  
-  glDisable(GL_LIGHTING);
-
-  // Step 1: update all the positions
-  ourSun->updatePosition(t);
-  earthsMoon->updatePosition(t, ourSun);
-  mercury->updatePosition(t, ourSun);
-  venus->updatePosition(t, ourSun);
-  mars->updatePosition(t, ourSun);
-  jupiter->updatePosition(t, ourSun);
-  saturn->updatePosition(t, ourSun);
-  uranus->updatePosition(t, ourSun);
-  neptune->updatePosition(t, ourSun);
-  
-  fgUpdateSunPos();   // get the right sun angle (especially important when 
-                      // running for the first time).
-  fgUpdateMoonPos();
-
-  if (displayList)
-    xglDeleteLists(displayList, 1);
-
-  displayList = xglGenLists(1);
-
-  FG_LOG( FG_ASTRO, FG_INFO, "Rebuilding astro display list" );
-
-  // Step 2: rebuild the display list
-  xglNewList( displayList, GL_COMPILE);
-  {
-    // Step 2a: Add the moon...
-    // Not that it is preferred to draw the moon first, and the sun next, in order to mime a
-    // solar eclipse. This is yet untested though...
-    // Euhh, actually the ecplise doesn't work...
-
-    // earthsMoon->newImage();
-    // Step 2b:  Add the sun
-    // ourSun->newImage();
-    // Step 2c: Add the planets
-    xglBegin(GL_POINTS);
-    mercury->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    venus  ->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    mars   ->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    jupiter->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    saturn ->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    uranus ->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    neptune->getPos(&ra, &dec, &magnitude);addPlanetToList(ra, dec, magnitude);
-    xglEnd();
-    xglEnable(GL_LIGHTING);
-  }
-  xglEndList();
-#endif
-}
-
-/*****************************************************************************
- * double SolarSystem::scaleMagnitude(double magn)
- * This private member function rescales the original magnitude, as used in the
- * astronomical sense of the word, into a value used by OpenGL to draw a 
- * convincing Star or planet
- * 
- * Argument: the astronomical magnitude
- *
- * return value: the rescaled magnitude
- ****************************************************************************/
-double SolarSystem::scaleMagnitude(double magn)
-{
-  double magnitude = (0.0 - magn) / 5.0 + 1.0;
-  magnitude = magnitude * 0.7 + (3 * 0.1);
-  if (magnitude > 1.0) magnitude = 1.0;
-  if (magnitude < 0.0) magnitude = 0.0;
-  return magnitude;
-}
-
-/***************************************************************************
- * void SolarSytem::addPlanetToList(double ra, double dec, double magn);
- *
- * This private member function first causes the magnitude to be properly
- * rescaled, and then adds the planet to the display list.
- * 
- * arguments: Right Ascension, declination, and magnitude
- *
- * return value: none
- **************************************************************************/
-void SolarSystem::addPlanetToList(double ra, double dec, double magn)
-{
-  double
-    magnitude = scaleMagnitude ( magn );
-
-  fgLIGHT *l = &cur_light_params;
-
-#if 0
-  if ((double) (l->sun_angle - FG_PI_2) > 
-      ((magnitude - 1.0) * - 20 * DEG_TO_RAD)) 
-    {
-      xglColor3f (magnitude, magnitude, magnitude);
-      xglVertex3f( 50000.0 * cos (ra) * cos (dec),
-		   50000.0 * sin (ra) * cos (dec),
-		   50000.0 * sin (dec));
-    }
-#endif
-}
-
-
-SolarSystem* SolarSystem::theSolarSystem = 0;
-
-/******************************************************************************
- * void solarSystemRebuild()
- * this a just a wrapper function, provided for use as an interface to the 
- * event manager
- *****************************************************************************/
-void solarSystemRebuild()
-{
-  SolarSystem::theSolarSystem->rebuild();
-}
diff --git a/simgear/ephemeris/solarsystem.hxx b/simgear/ephemeris/solarsystem.hxx
deleted file mode 100644
index fe713d07..00000000
--- a/simgear/ephemeris/solarsystem.hxx
+++ /dev/null
@@ -1,91 +0,0 @@
-/**************************************************************************
- * solarsystem.hxx
- * Written by Durk Talsma. Originally started October 1997, for distribution  
- * with the FlightGear project. Version 2 was written in August and 
- * September 1998. This code is based upon algorithms and data kindly 
- * provided by Mr. Paul Schlyter. (pausch@saaf.se). 
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id$
- **************************************************************************/
-#ifndef _SOLARSYSTEM_H_
-#define _SOLARSYSTEM_H_
-
-#include <Time/light.hxx>
-#include <Time/fg_time.hxx>
-#include <Main/views.hxx>
-
-#include "star.hxx"
-#include "moon.hxx"
-#include "mercury.hxx"
-#include "venus.hxx"
-#include "mars.hxx"
-#include "jupiter.hxx"
-#include "saturn.hxx"
-#include "uranus.hxx"
-#include "neptune.hxx"
-#include "pluto.hxx"
-
-
-class SolarSystem
-{
-private:
-  Star*    ourSun;
-  Moon*    earthsMoon;
-  Mercury* mercury;
-  Venus*   venus;
-  Mars*    mars;
-  Jupiter* jupiter;
-  Saturn*  saturn;
-  Uranus*  uranus;
-  Neptune* neptune;
-  //Pluto*   pluto;
-  
-  GLint displayList;
-  double scaleMagnitude(double magn);
-  void addPlanetToList(double ra, double dec, double magn);
-
-
-public:
-  SolarSystem(FGTime *t);
-  CelestialBody *getSun();
-  CelestialBody *getMoon();
-  ~SolarSystem();
-
-  static SolarSystem *theSolarSystem;  // thanks to Bernie Bright!
-  void rebuild();
-  friend void solarSystemRebuild();
-  void draw();
-};
-
-inline CelestialBody* SolarSystem::getSun()
-{
-  return ourSun;
-}
-
-inline CelestialBody* SolarSystem::getMoon()
-{
-  return earthsMoon;
-}
-
-inline void SolarSystem::draw()
-{
-  xglCallList(displayList);
-}
-  
-extern void solarSystemRebuild();
-
-#endif // _SOLARSYSTEM_H_
diff --git a/simgear/ephemeris/stars.cxx b/simgear/ephemeris/stars.cxx
index 2a767748..ff5d6aa4 100644
--- a/simgear/ephemeris/stars.cxx
+++ b/simgear/ephemeris/stars.cxx
@@ -1,8 +1,8 @@
-// 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
@@ -19,250 +19,98 @@
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 //
 // $Id$
-//*************************************************************************/
 
 
-#ifdef HAVE_CONFIG_H
-#  include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-#  include <windows.h>
-#endif
-
-#include <simgear/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>
-#endif
-
-#include <string>
+#include <simgear/misc/fgstream.hxx>
 
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
+#include "stars.hxx"
 
-#include <simgear/constants.h>
-#include <simgear/debug/logstream.hxx>
-#include <simgear/misc/fgpath.hxx>
-#include <simgear/misc/fgstream.hxx>
-#include <simgear/misc/stopwatch.hxx>
 
-#include <Aircraft/aircraft.hxx>
-#include <Main/options.hxx>
-#include <Main/views.hxx>
-#include <Time/fg_time.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" );
+    cout << "  Loading stars from " << data_path.str() << endl;
 
-    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() ) {
+	cout << "Cannot open star file: " << data_path.str() << endl;
 	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() );
-
-    fg_gzifstream in( path.str() );
-    if ( ! in ) {
-	FG_LOG( FG_ASTRO, FG_ALERT, "Cannot open star file: " << path.str() );
-	exit(-1);
-    }
+    double ra, dec, mag;
+    char c;
+    string name;
 
-    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++ ) {
+        getline( in, name, ',' );
+	// cout << "  data = " << name << endl;
 
-	stars[i] = xglGenLists(1);
-	xglNewList( stars[i], GL_COMPILE );
-	xglBegin( GL_POINTS );
-
-	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;
+    cout << "  Loaded " << nstars << " stars" << endl;
 
-    f = current_aircraft.fdm_state;
-    l = &cur_light_params;
-    t = FGTime::cur_time_params;
-
-    // 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;
 }
-
-
diff --git a/simgear/ephemeris/stars.hxx b/simgear/ephemeris/stars.hxx
index 79a72c52..2714ac44 100644
--- a/simgear/ephemeris/stars.hxx
+++ b/simgear/ephemeris/stars.hxx
@@ -1,8 +1,8 @@
-// stars.hxx -- data structures and routines for managing and rendering stars.
+// stars.hxx -- 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
@@ -25,23 +25,37 @@
 #define _STARS_HXX
 
 
-#ifndef __cplusplus                                                          
-# error This library requires C++
-#endif                                   
+#include <plib/sg.h>
 
-#include <Time/fg_time.hxx>
+#include <simgear/misc/fgpath.hxx>
 
-#define FG_STAR_LEVELS 8         // how many star transitions
 
-// Initialize the Star Management Subsystem
-int fgStarsInit( void );
+#define FG_MAX_STARS 3500
 
-// Draw the Stars
-void fgStarsRender( void );
 
-// [no longer used?] extern FGTime cur_time_params;
+class FGStars {
 
+    int nstars;
+    sgdVec3 *stars;
+    
+    FGPath data_path;
 
-#endif // _STARS_HXX
+public:
+
+    // Constructor
+    FGStars();
+    FGStars( FGPath path );
+
+    // Destructor
+    ~FGStars();
 
+    // load the stars database
+    bool load();
 
+    // stars
+    inline int getNumStars() const { return nstars; }
+    inline sgdVec3 *getStars() { return stars; }
+};
+
+
+#endif // _STARS_HXX
-- 
2.39.5