Talsma.
noinst_LIBRARIES = libAstro.a
libAstro_a_SOURCES = \
+ celestialBody.cxx celestialBody.hxx \
+ jupiter.cxx jupiter.hxx \
+ mars.cxx mars.hxx \
+ mercury.cxx mercury.hxx \
moon.cxx moon.hxx \
- orbits.cxx orbits.hxx \
- planets.cxx planets.hxx \
+ neptune.cxx neptune.hxx \
+ saturn.cxx saturn.hxx \
sky.cxx sky.hxx \
+ solarsystem.cxx solarsystem.hxx \
+ star.cxx star.hxx \
stars.cxx stars.hxx \
- sun.cxx sun.hxx
+ uranus.cxx uranus.hxx \
+ venus.cxx venus.hxx
INCLUDES += -I$(top_builddir) -I$(top_builddir)/Lib -I$(top_builddir)/Simulator
--- /dev/null
+/**************************************************************************
+ * celestialBody.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+#include "celestialBody.hxx"
+#include "star.hxx"
+#include <Debug/fg_debug.h>
+
+/**************************************************************************
+ * void CelestialBody::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * Basically, this member function provides a general interface for
+ * calculating the right ascension and declinaion. This function is
+ * used for calculating the planetary positions. For the planets, an
+ * overloaded member function is provided to additionally calculate the
+ * planet's magnitude.
+ * The sun and moon have their own overloaded updatePosition member, as their
+ * position is calculated an a slightly different manner.
+ *
+ * arguments:
+ * fgTIME t: provides the current time.
+ * Star *ourSun: the sun's position is needed to convert heliocentric
+ * coordinates into geocentric coordinates.
+ *
+ * return value: none
+ *
+ *************************************************************************/
+void CelestialBody::updatePosition(fgTIME *t, Star *ourSun)
+{
+ double eccAnom, v, ecl, actTime,
+ xv, yv, xh, yh, zh, xg, yg, zg, xe, ye, ze;
+
+ updateOrbElements(t);
+ actTime = fgCalcActTime(t);
+
+ // calcualate the angle bewteen ecliptic and equatorial coordinate system
+ ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 *actTime);
+
+ eccAnom = fgCalcEccAnom(M, e); //calculate the eccentric anomaly
+ xv = a * (cos(eccAnom) - e);
+ yv = a * (sqrt (1.0 - e*e) * sin(eccAnom));
+ v = atan2(yv, xv); // the planet's true anomaly
+ r = sqrt (xv*xv + yv*yv); // the planet's distance
+
+ // calculate the planet's position in 3D space
+ xh = r * (cos(N) * cos(v+w) - sin(N) * sin(v+w) * cos(i));
+ yh = r * (sin(N) * cos(v+w) + cos(N) * sin(v+w) * cos(i));
+ zh = r * (sin(v+w) * sin(i));
+
+ // calculate the ecliptic longitude and latitude
+ xg = xh + ourSun->getxs();
+ yg = yh + ourSun->getys();
+ zg = zh;
+
+ xe = xg;
+ ye = yg * cos(ecl) - zg * sin(ecl);
+ ze = yg * sin(ecl) + zg * cos(ecl);
+ rightAscension = atan2(ye, xe);
+ declination = atan2(ze, sqrt(xe*xe + ye*ye));
+ fgPrintf(FG_GENERAL, FG_INFO, "Planet found at : %f (ra), %f (dec)\n",
+ rightAscension, declination);
+
+ //calculate some variables specific to calculating the magnitude
+ //of the planet
+ R = sqrt (xg*xg + yg*yg + zg*zg);
+ s = ourSun->getDistance();
+ FV = RAD_TO_DEG * acos( (r*r + R*R - s*s) / (2*r*R));
+};
+
+/****************************************************************************
+ * double CelestialBody::fgCalcEccAnom(double M, double e)
+ * this private member calculates the eccentric anomaly of a celestial body,
+ * given its mean anomaly and eccentricity.
+ *
+ * -Mean anomaly: the approximate angle between the perihelion and the current
+ * position. this angle increases uniformly with time.
+ *
+ * True anomaly: the actual angle between perihelion and current position.
+ *
+ * Eccentric anomaly: this is an auxilary angle, used in calculating the true
+ * anomaly from the mean anomaly.
+ *
+ * -eccentricity. Indicates the amount in which the orbit deviates from a
+ * circle (0 = circle, 0-1, is ellipse, 1 = parabola, > 1 = hyperbola).
+ *
+ * This function is also known as solveKeplersEquation()
+ *
+ * arguments:
+ * M: the mean anomaly
+ * e: the eccentricity
+ *
+ * return value:
+ * the eccentric anomaly
+ *
+ ****************************************************************************/
+double CelestialBody::fgCalcEccAnom(double M, double e)
+{
+ double
+ eccAnom, E0, E1, diff;
+
+ eccAnom = M + e * sin(M) * (1.0 + e * cos (M));
+ // iterate to achieve a greater precision for larger eccentricities
+ if (e > 0.05)
+ {
+ E0 = eccAnom;
+ do
+ {
+ E1 = E0 - (E0 - e * sin(E0) - M) / (1 - e *cos(E0));
+ diff = fabs(E0 - E1);
+ E0 = E1;
+ }
+ while (diff > (DEG_TO_RAD * 0.001));
+ return E0;
+ }
+ return eccAnom;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * celestialBody.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _CELESTIALBODY_H_
+#define _CELESTIALBODY_H_
+
+#ifndef __cplusplus
+# error This library requires C++
+#endif
+
+
+#include <stdio.h>
+#include <math.h>
+
+#include <Time/fg_time.hxx>
+#include <Include/fg_constants.h>
+
+class Star;
+
+class CelestialBody
+{
+protected: // make the data protected, in order to give the inherited
+ // classes direct access to the data
+ double NFirst; /* longitude of the ascending node first part */
+ double NSec; /* longitude of the ascending node second part */
+ double iFirst; /* inclination to the ecliptic first part */
+ double iSec; /* inclination to the ecliptic second part */
+ double wFirst; /* first part of argument of perihelion */
+ double wSec; /* second part of argument of perihelion */
+ double aFirst; /* semimayor axis first part*/
+ double aSec; /* semimayor axis second part */
+ double eFirst; /* eccentricity first part */
+ double eSec; /* eccentricity second part */
+ double MFirst; /* Mean anomaly first part */
+ double MSec; /* Mean anomaly second part */
+
+ double N, i, w, a, e, M; /* the resulting orbital elements, obtained from the former */
+
+ double rightAscension, declination;
+ double r, R, s, FV;
+ double magnitude;
+
+ double fgCalcEccAnom(double M, double e);
+ double fgCalcActTime(fgTIME *t);
+ void updateOrbElements(fgTIME *t);
+
+public:
+ CelestialBody(double Nf, double Ns,
+ double If, double Is,
+ double wf, double ws,
+ double af, double as,
+ double ef, double es,
+ double Mf, double Ms, fgTIME *t);
+ void getPos(double *ra, double *dec);
+ void getPos(double *ra, double *dec, double *magnitude);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+/*****************************************************************************
+ * inline CelestialBody::CelestialBody
+ * public constructor for a generic celestialBody object.
+ * initializes the 6 primary orbital elements. The elements are:
+ * N: longitude of the ascending node
+ * i: inclination to the ecliptic
+ * w: argument of perihelion
+ * a: semi-major axis, or mean distance from the sun
+ * e: eccenticity
+ * M: mean anomaly
+ * Each orbital element consists of a constant part and a variable part that
+ * gradually changes over time.
+ *
+ * Argumetns:
+ * the 13 arguments to the constructor constitute the first, constant
+ * ([NiwaeM]f) and the second variable ([NiwaeM]s) part of the orbital
+ * elements. The 13th argument is the current time. Note that the inclination
+ * is written with a capital (If, Is), because 'if' is a reserved word in the
+ * C/C++ programming language.
+ ***************************************************************************/
+inline CelestialBody::CelestialBody(double Nf, double Ns,
+ double If, double Is,
+ double wf, double ws,
+ double af, double as,
+ double ef, double es,
+ double Mf, double Ms, fgTIME *t)
+{
+ NFirst = Nf; NSec = Ns;
+ iFirst = If; iSec = Is;
+ wFirst = wf; wSec = ws;
+ aFirst = af; aSec = as;
+ eFirst = ef; eSec = es;
+ MFirst = Mf; MSec = Ms;
+ updateOrbElements(t);
+};
+
+/****************************************************************************
+ * inline void CelestialBody::updateOrbElements(fgTIME *t)
+ * given the current time, this private member calculates the actual
+ * orbital elements
+ *
+ * Arguments: fgTIME *t: the current time:
+ *
+ * return value: none
+ ***************************************************************************/
+inline void CelestialBody::updateOrbElements(fgTIME *t)
+{
+ double actTime = fgCalcActTime(t);
+ M = DEG_TO_RAD * (MFirst + (MSec * actTime));
+ w = DEG_TO_RAD * (wFirst + (wSec * actTime));
+ N = DEG_TO_RAD * (NFirst + (NSec * actTime));
+ i = DEG_TO_RAD * (iFirst + (iSec * actTime));
+ e = eFirst + (eSec * actTime);
+ a = aFirst + (aSec * actTime);
+}
+/*****************************************************************************
+ * inline double CelestialBody::fgCalcActTime(fgTIME *t)
+ * this private member function returns the offset in days from the epoch for
+ * wich the orbital elements are calculated (Jan, 1st, 2000).
+ *
+ * Argument: the current time
+ *
+ * return value: the (fractional) number of days until Jan 1, 2000.
+ ****************************************************************************/
+inline double CelestialBody::fgCalcActTime(fgTIME *t)
+{
+ return (t->mjd - 36523.5);
+}
+
+/*****************************************************************************
+ * inline void CelestialBody::getPos(double* ra, double* dec)
+ * gives public access to Right Ascension and declination
+ *
+ ****************************************************************************/
+inline void CelestialBody::getPos(double* ra, double* dec)
+{
+ *ra = rightAscension;
+ *dec = declination;
+}
+
+/*****************************************************************************
+ * inline void CelestialBody::getPos(double* ra, double* dec, double* magnitude
+ * gives public acces to the current Right ascension, declination, and
+ * magnitude
+ ****************************************************************************/
+inline void CelestialBody::getPos(double* ra, double* dec, double* magn)
+{
+ *ra = rightAscension;
+ *dec = declination;
+ *magn = magnitude;
+}
+
+
+#endif // _CELESTIALBODY_H_
+
+
+
+
+
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * jupiter.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+#include "jupiter.hxx"
+
+/*************************************************************************
+ * Jupiter::Jupiter(fgTIME *t)
+ * Public constructor for class Jupiter
+ * Argument: The current time.
+ * the hard coded orbital elements for Jupiter are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Jupiter::Jupiter(fgTIME *t) :
+ CelestialBody(100.4542, 2.7685400E-5,
+ 1.3030, -1.557E-7,
+ 273.8777, 1.6450500E-5,
+ 5.2025600, 0.000000,
+ 0.048498, 4.469E-9,
+ 19.89500, 0.08308530010, t)
+{
+}
+
+/*************************************************************************
+ * void Jupiter::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Jupiter, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Jupiter specific equation
+ *************************************************************************/
+void Jupiter::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -9.25 + 5*log10( r*R ) + 0.014 * FV;
+}
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * jupiter.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _JUPITER_HXX_
+#define _JUPITER_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Jupiter : public CelestialBody
+{
+public:
+ Jupiter (fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+#endif // _JUPITER_HXX_
--- /dev/null
+/**************************************************************************
+ * mars.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "mars.hxx"
+
+/*************************************************************************
+ * Mars::Mars(fgTIME *t)
+ * Public constructor for class Mars
+ * Argument: The current time.
+ * the hard coded orbital elements for Mars are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Mars::Mars(fgTIME *t) :
+ CelestialBody(49.55740, 2.1108100E-5,
+ 1.8497, -1.78E-8,
+ 286.5016, 2.9296100E-5,
+ 1.5236880, 0.000000,
+ 0.093405, 2.516E-9,
+ 18.60210, 0.52402077660, t)
+{
+}
+/*************************************************************************
+ * void Mars::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Mars, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Mars specific equation
+ *************************************************************************/
+void Mars::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -1.51 + 5*log10( r*R ) + 0.016 * FV;
+}
--- /dev/null
+/**************************************************************************
+ * mars.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _MARS_HXX_
+#define _MARS_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Mars : public CelestialBody
+{
+public:
+ Mars ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+#endif // _MARS_HXX_
--- /dev/null
+/**************************************************************************
+ * mercury.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "mercury.hxx"
+
+/*************************************************************************
+ * Mercury::Mercury(fgTIME *t)
+ * Public constructor for class Mercury
+ * Argument: The current time.
+ * the hard coded orbital elements for Mercury are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Mercury::Mercury(fgTIME *t) :
+ CelestialBody (48.33130, 3.2458700E-5,
+ 7.0047, 5.00E-8,
+ 29.12410, 1.0144400E-5,
+ 0.3870980, 0.000000,
+ 0.205635, 5.59E-10,
+ 168.6562, 4.09233443680, t)
+{
+}
+/*************************************************************************
+ * void Mercury::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Mercury, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Mercury specific equation
+ *************************************************************************/
+void Mercury::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -0.36 + 5*log10( r*R ) + 0.027 * FV + 2.2E-13 * pow(FV, 6);
+}
+
+
--- /dev/null
+/**************************************************************************
+ * mercury.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _MERCURY_HXX_
+#define _MERCURY_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Mercury : public CelestialBody
+{
+public:
+ Mercury ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star* ourSun);
+};
+
+#endif // _MERURY_HXX_
/**************************************************************************
- * moon.c
- * Written by Durk Talsma. Started October 1997, for the flight gear project.
+ * moon.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
* $Id$
* (Log is kept at end of this file)
**************************************************************************/
+#include <Flight/flight.h>
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <math.h>
-#include <GL/glut.h>
-#include <XGL/xgl.h>
-
-#include <Aircraft/aircraft.h>
-#include <Debug/fg_debug.h>
-#include <Include/fg_constants.h>
-#include <Include/general.h>
-#include <Main/views.hxx>
-#include <Time/fg_time.hxx>
-
-#include "orbits.hxx"
+#include <string.h>
#include "moon.hxx"
+#include <Debug/fg_debug.h>
+#include <Objects/texload.h>
+
+static GLuint moon_texid;
+static GLubyte *moon_texbuf;
+
+/*************************************************************************
+ * Moon::Moon(fgTIME *t)
+ * Public constructor for class Moon. Initializes the orbital elements and
+ * sets up the moon texture.
+ * Argument: The current time.
+ * the hard coded orbital elements for Moon are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Moon::Moon(fgTIME *t) :
+ CelestialBody(125.1228, -0.0529538083,
+ 5.1454, 0.00000,
+ 318.0634, 0.1643573223,
+ 60.266600, 0.000000,
+ 0.054900, 0.000000,
+ 115.3654, 13.0649929509, t)
+{
+ string tpath, fg_tpath;
+ int width, height;
+
+ fgPrintf( FG_GENERAL, FG_INFO, "Initializing Moon Texture\n");
+#ifdef GL_VERSION_1_1
+ xglGenTextures(1, &moon_texid);
+ xglBindTexture(GL_TEXTURE_2D, moon_texid);
+#elif GL_EXT_texture_object
+ xglGenTexturesEXT(1, &moon_texid);
+ xglBindTextureEXT(GL_TEXTURE_2D, moon_texid);
+#else
+# error port me
+#endif
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-struct CelestialCoord moonPos;
-
-static float xMoon, yMoon, zMoon;
-static GLint moon = 0;
-
-
-
-/* --------------------------------------------------------------
- This section contains the code that calculates the actual
- position of the moon in the night sky.
-----------------------------------------------------------------*/
-struct CelestialCoord fgCalculateMoon(struct OrbElements params,
- struct OrbElements sunParams,
- fgTIME t)
-{
- struct CelestialCoord
- geocCoord, topocCoord;
+ // load in the texture data
+ tpath = current_options.get_fg_root() + "/Textures/" + "moon.rgb";
- double
+ if ( (moon_texbuf = read_rgb_texture(tpath.c_str(), &width, &height))
+ == NULL )
+ {
+ // Try compressed
+ fg_tpath = tpath + ".gz";
+ if ( (moon_texbuf = read_rgb_texture(fg_tpath.c_str(), &width, &height))
+ == NULL )
+ {
+ fgPrintf( FG_GENERAL, FG_EXIT,
+ "Error in loading moon texture %s\n", tpath );
+ exit(1);
+ }
+ }
+
+ glTexImage2D( GL_TEXTURE_2D,
+ 0,
+ GL_RGB,
+ 256, 256,
+ 0,
+ GL_RGB, GL_UNSIGNED_BYTE,
+ moon_texbuf);
+}
+/*****************************************************************************
+ * void Moon::updatePosition(fgTIME *t, Star *ourSun)
+ * this member function calculates the actual topocentric position (i.e.)
+ * the position of the moon as seen from the current position on the surface
+ * of the moon.
+ ****************************************************************************/
+void Moon::updatePosition(fgTIME *t, Star *ourSun)
+{
+ double
eccAnom, ecl, lonecl, latecl, actTime,
xv, yv, v, r, xh, yh, zh, xg, yg, zg, xe, ye, ze,
- Ls, Lm, D, F, mpar, gclat, rho, HA, g;
+ Ls, Lm, D, F, mpar, gclat, rho, HA, g,
+ geoRa, geoDec;
- fgAIRCRAFT *a;
+ fgAIRCRAFT *air;
fgFLIGHT *f;
- a = ¤t_aircraft;
- f = a->flight;
-
- /* calculate the angle between ecliptic and equatorial coordinate
- * system, in Radians */
+ air = ¤t_aircraft;
+ f = air->flight;
+
+ updateOrbElements(t);
actTime = fgCalcActTime(t);
- ecl = ((DEG_TO_RAD * 23.4393) - (DEG_TO_RAD * 3.563E-7) * actTime);
- /*ecl = 0.409093 - 6.2186E-9 * actTime; */
-
- /* calculate the eccentric anomaly */
- eccAnom = fgCalcEccAnom(params.M, params.e);
- /* calculate the moon's distance (r) and true anomaly (v) */
- xv = params.a * ( cos(eccAnom) - params.e);
- yv = params.a * ( sqrt(1.0 - params.e*params.e) * sin(eccAnom));
- v =atan2(yv, xv);
- r = sqrt(xv*xv + yv*yv);
+ // calculate the angle between ecliptic and equatorial coordinate system
+ // in Radians
+ ecl = ((DEG_TO_RAD * 23.4393) - (DEG_TO_RAD * 3.563E-7) * actTime);
+ eccAnom = fgCalcEccAnom(M, e); // Calculate the eccentric anomaly
+ xv = a * (cos(eccAnom) - e);
+ yv = a * (sqrt(1.0 - e*e) * sin(eccAnom));
+ v = atan2(yv, xv); // the moon's true anomaly
+ r = sqrt (xv*xv + yv*yv); // and its distance
- /* estimate the geocentric rectangular coordinates here */
- xh = r * (cos (params.N) * cos (v + params.w) -
- sin (params.N) * sin (v + params.w) * cos (params.i));
- yh = r * (sin (params.N) * cos (v + params.w) +
- cos (params.N) * sin (v + params.w) * cos (params.i));
- zh = r * (sin(v + params.w) * sin(params.i));
-
- /* calculate the ecliptic latitude and longitude here */
- lonecl = atan2( yh, xh);
- latecl = atan2( zh, sqrt( xh*xh + yh*yh));
-
- /* calculate a number of perturbations, i.e. disturbances caused by
- * the gravitational influence of the sun and the other mayor
- * planets. The largest of these even have their own names */
- Ls = sunParams.M + sunParams.w;
- Lm = params.M + params.w + params.N;
+ // estimate the geocentric rectangular coordinates here
+ xh = r * (cos(N) * cos (v+w) - sin (N) * sin(v+w) * cos(i));
+ yh = r * (sin(N) * cos (v+w) + cos (N) * sin(v+w) * cos(i));
+ zh = r * (sin(v+w) * sin(i));
+
+ // calculate the ecliptic latitude and longitude here
+ lonecl = atan2 (yh, xh);
+ latecl = atan2(zh, sqrt(xh*xh + yh*yh));
+
+ /* Calculate a number of perturbatioin, i.e. disturbances caused by the
+ * gravitational infuence of the sun and the other major planets.
+ * The largest of these even have a name */
+ Ls = ourSun->getM() + ourSun->getw();
+ Lm = M + w + N;
D = Lm - Ls;
- F = Lm - params.N;
+ F = Lm - N;
- lonecl += DEG_TO_RAD * (
- - 1.274 * sin (params.M - 2*D) /* the Evection */
- + 0.658 * sin (2 * D) /* the Variation */
- - 0.186 * sin (sunParams.M) /* the yearly variation */
- - 0.059 * sin (2*params.M - 2*D)
- - 0.057 * sin (params.M - 2*D + sunParams.M)
- + 0.053 * sin (params.M + 2*D)
- + 0.046 * sin (2*D - sunParams.M)
- + 0.041 * sin (params.M - sunParams.M)
- - 0.035 * sin (D) /* the Parallactic Equation */
- - 0.031 * sin (params.M + sunParams.M)
- - 0.015 * sin (2*F - 2*D)
- + 0.011 * sin (params.M - 4*D)
+ lonecl += DEG_TO_RAD * (-1.274 * sin (M - 2*D)
+ +0.658 * sin (2*D)
+ -0.186 * sin(ourSun->getM())
+ -0.059 * sin(2*M - 2*D)
+ -0.057 * sin(M - 2*D + ourSun->getM())
+ +0.053 * sin(M + 2*D)
+ +0.046 * sin(2*D - ourSun->getM())
+ +0.041 * sin(M - ourSun->getM())
+ -0.035 * sin(D)
+ -0.031 * sin(M + ourSun->getM())
+ -0.015 * sin(2*F - 2*D)
+ +0.011 * sin(M - 4*D)
);
- latecl += DEG_TO_RAD * (
- - 0.173 * sin (F - 2*D)
- - 0.055 * sin (params.M - F - 2*D)
- - 0.046 * sin (params.M + F - 2*D)
- + 0.033 * sin (F + 2*D)
- + 0.017 * sin (2 * params.M + F)
+ latecl += DEG_TO_RAD * (-0.173 * sin(F-2*D)
+ -0.055 * sin(M - F - 2*D)
+ -0.046 * sin(M + F - 2*D)
+ +0.033 * sin(F + 2*D)
+ +0.017 * sin(2*M + F)
);
-
- r += (
- - 0.58 * cos(params.M - 2*D)
- - 0.46 * cos(2*D)
+ r += (-0.58 * cos(M - 2*D)
+ -0.46 * cos(2*D)
);
-
+ fgPrintf(FG_GENERAL, FG_INFO, "Running moon update\n");
xg = r * cos(lonecl) * cos(latecl);
yg = r * sin(lonecl) * cos(latecl);
zg = r * sin(latecl);
-
- xe = xg;
- ye = yg * cos(ecl) - zg * sin(ecl);
- ze = yg * sin(ecl) + zg * cos(ecl);
+ xe = xg;
+ ye = yg * cos(ecl) -zg * sin(ecl);
+ ze = yg * sin(ecl) +zg * cos(ecl);
-
+ geoRa = atan2(ye, xe);
+ geoDec = atan2(ze, sqrt(xe*xe + ye*ye));
- geocCoord.RightAscension = atan2(ye, xe);
- geocCoord.Declination = atan2(ze, sqrt(xe*xe + ye*ye));
-
- /* New since 25 december 1997 */
- /* Calculate the moon's topocentric position instead of it's geocentric! */
+ // Given the moon's geocentric ra and dec, calculate its
+ // topocentric ra and dec. i.e. the position as seen from the
+ // surface of the earth, instead of the center of the earth
- /* calculate the moon's parrallax, i.e. the apparent size of the
- * (equatorial) radius of the Earth, as seen from the moon */
- mpar = asin( 1 / r);
- gclat = FG_Latitude - 0.083358 * sin (2 * DEG_TO_RAD * FG_Latitude);
+ // First calculates the moon's parrallax, that is, the apparent size of the
+ // (equatorial) radius of the earth, as seen from the moon
+ mpar = asin ( 1 / r);
+ gclat = FG_Latitude - 0.003358 * sin (2 * DEG_TO_RAD * FG_Latitude);
rho = 0.99883 + 0.00167 * cos(2 * DEG_TO_RAD * FG_Latitude);
-
- if (geocCoord.RightAscension < 0)
- geocCoord.RightAscension += (2*FG_PI);
-
- HA = t.lst - (3.8197186 * geocCoord.RightAscension);
-
- g = atan (tan(gclat) / cos( (HA / 3.8197186)));
-
-
-
- topocCoord.RightAscension = geocCoord.RightAscension -
- mpar * rho * cos (gclat) * sin (HA) / cos (geocCoord.Declination);
- topocCoord.Declination = geocCoord.Declination -
- mpar * rho * sin (gclat) * sin (g - geocCoord.Declination) / sin (g);
- return topocCoord;
+ if (geoRa < 0)
+ geoRa += (2*FG_PI);
+
+ HA = t->lst - (3.8197186 * geoRa);
+ g = atan (tan(gclat) / cos ((HA / 3.8197186)));
+ rightAscension = geoRa - mpar * rho * cos(gclat) * sin(HA) / cos (geoDec);
+ declination = geoDec - mpar * rho * sin (gclat) * sin (g - geoDec) / sin(g);
}
-void fgMoonInit( void ) {
- fgPrintf( FG_ASTRO, FG_INFO, "Initializing the Moon\n");
- fgSolarSystemUpdate(&(pltOrbElements[1]), cur_time_params);
- moonPos = fgCalculateMoon(pltOrbElements[1], pltOrbElements[0],
- cur_time_params);
- fgPrintf( FG_ASTRO, FG_DEBUG,
- "Moon found at %f (ra), %f (dec)\n", moonPos.RightAscension,
- moonPos.Declination);
-
- xMoon = 60000.0 * cos(moonPos.RightAscension) * cos(moonPos.Declination);
- yMoon = 60000.0 * sin(moonPos.RightAscension) * cos(moonPos.Declination);
- zMoon = 60000.0 * sin(moonPos.Declination);
-
- if (moon) {
- xglDeleteLists (moon, 1);
- }
-
- moon = xglGenLists (1);
- xglNewList (moon, GL_COMPILE);
-
- xglPushMatrix ();
- xglTranslatef (xMoon, yMoon, zMoon);
- // xglScalef (1400, 1400, 1400);
-
- // glutSolidSphere (1.0, 10, 10);
- glutSolidSphere (1200.0, 10, 10);
- xglPopMatrix ();
- xglEndList ();
+/************************************************************************
+ * void Moon::newImage(float ra, float dec)
+ *
+ * This function regenerates a new visual image of the moon, which is added to
+ * solarSystem display list.
+ *
+ * Arguments: Right Ascension and declination
+ *
+ * return value: none
+ **************************************************************************/
+void Moon::newImage(float ra, float dec)
+{
+ glEnable(GL_TEXTURE_2D);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ glBindTexture(GL_TEXTURE_2D, moon_texid);
+
+ //xglRotatef(-90, 0.0, 0.0, 1.0);
+ xglRotatef(((RAD_TO_DEG * ra)- 90.0), 0.0, 0.0, 1.0);
+ xglRotatef((RAD_TO_DEG * dec), 1.0, 0.0, 0.0);
+
+ fgPrintf( FG_GENERAL, FG_INFO,
+ "Ra = (%f), Dec= (%f)", (RAD_TO_DEG *ra), (RAD_TO_DEG *dec) );
+ xglTranslatef(0.0, 58600.0, 0.0);
+ Object = gluNewQuadric();
+ gluQuadricTexture( Object, GL_TRUE );
+ gluSphere( Object, 1367, 12, 12 );
+ glDisable(GL_TEXTURE_2D);
}
-/* Draw the moon */
-void fgMoonRender( void ) {
- GLfloat moonColor[4] = {0.85, 0.75, 0.35, 1.0};
- GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
- xglMaterialfv (GL_FRONT, GL_AMBIENT, black);
- xglMaterialfv (GL_FRONT, GL_DIFFUSE, moonColor);
- xglCallList(moon);
-}
-/* $Log$
-/* Revision 1.6 1998/09/03 21:25:39 curt
-/* log file tweak.
-/*
- * Revision 1.5 1998/07/30 23:43:30 curt
- * Eliminated glScale call so that glutSolidSphere normals are preserved
- * correctly. Also made the sun & moon a bit smaller.
- *
- * Revision 1.4 1998/04/28 01:18:59 curt
- * Type-ified fgTIME and fgVIEW
- *
- * Revision 1.3 1998/04/25 22:06:24 curt
- * Edited cvs log messages in source files ... bad bad bad!
- *
- * Revision 1.2 1998/04/24 00:45:00 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:28 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.9 1998/04/18 04:13:56 curt
- * Moved fg_debug.c to it's own library.
- *
- * Revision 1.8 1998/04/03 21:52:49 curt
- * Converting to Gnu autoconf system.
- *
- * Revision 1.7 1998/02/23 19:07:54 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.6 1998/02/07 15:29:32 curt
- * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.5 1998/02/02 20:53:21 curt
- * To version 0.29
- *
- * Revision 1.4 1998/01/27 00:47:46 curt
- * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
- * system and commandline/config file processing code.
- *
- * Revision 1.3 1998/01/19 19:26:57 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.2 1998/01/19 18:40:16 curt
- * Tons of little changes to clean up the code and to remove fatal errors
- * when building with the c++ compiler.
- *
- * Revision 1.1 1998/01/07 03:16:16 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.16 1998/01/06 01:20:24 curt
- * Tweaks to help building with MSVC++
- *
- * Revision 1.15 1998/01/05 18:44:35 curt
- * Add an option to advance/decrease time from keyboard.
- *
- * Revision 1.14 1997/12/30 20:47:50 curt
- * Integrated new event manager with subsystem initializations.
- *
- * Revision 1.13 1997/12/30 16:41:00 curt
- * Added log at end of file.
- *
- */
+
/**************************************************************************
- * moon.h
- *
- * Written 1997 by Durk Talsma, started October, 1997.
+ * moon.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
* $Id$
* (Log is kept at end of this file)
**************************************************************************/
-
-
-#ifndef _MOON_HXX
-#define _MOON_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-#include <math.h>
-
+#ifndef _MOON_HXX_
+#define _MOON_HXX_
+
+#include <Aircraft/aircraft.h>
+#include <Debug/fg_debug.h>
+#include <Include/fg_constants.h>
+#include <Include/general.h>
+#include <Main/views.hxx>
#include <Time/fg_time.hxx>
-#include "orbits.hxx"
-
-
-/* Initialize the Moon Display management Subsystem */
-void fgMoonInit( void );
-
-/* Draw the Moon */
-void fgMoonRender( void );
-
-struct CelestialCoord fgCalculateMoon(struct OrbElements Params,
- struct OrbElements sunParams,
- fgTIME t);
-
-extern struct OrbElements pltOrbElements[9];
+#include "celestialBody.hxx"
+#include "star.hxx"
+class Moon : public CelestialBody
+{
+private:
+ void TexInit(); // This should move to the constructor eventually.
-#endif /* _MOON_HXX */
+ GLUquadricObj *Object;
+ GLuint Sphere;
+
+public:
+ Moon ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+ void newImage(float, float);
+};
-/* $Log$
-/* Revision 1.3 1998/04/28 01:19:00 curt
-/* Type-ified fgTIME and fgVIEW
-/*
- * Revision 1.2 1998/04/24 00:45:00 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:28 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.7 1998/04/21 17:02:30 curt
- * Prepairing for C++ integration.
- *
- * Revision 1.6 1998/02/23 19:07:54 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.5 1998/02/02 20:53:21 curt
- * To version 0.29
- *
- * Revision 1.4 1998/01/22 02:59:27 curt
- * Changed #ifdef FILE_H to #ifdef _FILE_H
- *
- * Revision 1.3 1998/01/19 19:26:58 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.2 1998/01/19 18:40:17 curt
- * Tons of little changes to clean up the code and to remove fatal errors
- * when building with the c++ compiler.
- *
- * Revision 1.1 1998/01/07 03:16:16 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.4 1997/12/11 04:43:56 curt
- * Fixed sun vector and lighting problems. I thing the moon is now lit
- * correctly.
- *
- * Revision 1.3 1997/11/25 19:25:35 curt
- * Changes to integrate Durk's moon/sun code updates + clean up.
- *
- * Revision 1.2 1997/10/25 03:24:23 curt
- * Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
- *
- * Revision 1.1 1997/10/25 03:16:09 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
+#endif // _MOON_HXX_
--- /dev/null
+/**************************************************************************
+ * neptune.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+#include "neptune.hxx"
+
+/*************************************************************************
+ * Neptune::Neptune(fgTIME *t)
+ * Public constructor for class Neptune
+ * Argument: The current time.
+ * the hard coded orbital elements for Neptune are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Neptune::Neptune(fgTIME *t) :
+ CelestialBody(131.7806, 3.0173000E-5,
+ 1.7700, -2.550E-7,
+ 272.8461, -6.027000E-6,
+ 30.058260, 3.313E-8,
+ 0.008606, 2.150E-9,
+ 260.2471, 0.00599514700, t)
+{
+}
+/*************************************************************************
+ * void Neptune::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Neptune, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Neptune specific equation
+ *************************************************************************/
+void Neptune::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -6.90 + 5*log10 (r*R) + 0.001 *FV;
+}
--- /dev/null
+/**************************************************************************
+ * neptune.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _NEPTUNE_HXX_
+#define _NEPTUNE_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Neptune : public CelestialBody
+{
+public:
+ Neptune ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+#endif // _NEPTUNE_HXX_
+++ /dev/null
-/**************************************************************************
- * orbits.c - calculates the orbital elements of the sun, moon and planets.
- * For inclusion in flight gear
- *
- * Written 1997 by Durk Talsma, started October 19, 1997.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <math.h>
-#include <string.h>
-#include <string>
-
-#include <Debug/fg_debug.h>
-#include <Include/fg_constants.h>
-#include <Include/fg_zlib.h>
-#include <Main/options.hxx>
-#include <Time/fg_time.hxx>
-
-#include "orbits.hxx"
-
-
-struct OrbElements pltOrbElements[9];
-
-static fgFile data;
-
-
-double fgCalcActTime(fgTIME t)
-{
- return (t.mjd - 36523.5);
-}
-
-
-double fgCalcEccAnom(double M, double e)
-{
- double
- eccAnom, E0, E1, diff;
-
- eccAnom = M + e * sin(M) * (1.0 + e * cos(M));
- /* iterate to achieve a greater precision for larger eccentricities */
- if (e > 0.05)
- {
- E0 = eccAnom;
- do
- {
- E1 = E0 - (E0 - e * sin(E0) - M) / (1 - e * cos(E0));
- diff = fabs(E0 - E1);
- E0 = E1;
- }
- while (diff > (DEG_TO_RAD * 0.001));
- return E0;
- }
- return eccAnom;
-}
-
-
-/* This function assumes that if the FILE ptr is valid that the
- contents will be valid. Should we check the file for validity? */
-
-/* Sounds like a good idea to me. What type of checks are you thinking
- of, other than feof(FILE*)? That's currently the only check I can
- think of (Durk) */
-
-int fgReadOrbElements(struct OrbElements *dest, gzFile src) {
- char line[256];
- int i, j, len;
-
- j = 0;
- do {
- if ( fggets(src, line, 256) == NULL ) {
- fgPrintf (FG_ASTRO, FG_ALERT,
- "End of file found while reading planetary positions:\n");
- return 0;
- }
- len = strlen(line);
-
- for (i = 0; i < len; i++) {
- if (line[i] == '#')
- line[i] = 0;
- }
- // printf("Reading line %d = %s\n", j++, line);
- } while (!(strlen(line)));
-
- sscanf(line, "%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf,%lf\n",
- &dest->NFirst, &dest->NSec,
- &dest->iFirst, &dest->iSec,
- &dest->wFirst, &dest->wSec,
- &dest->aFirst, &dest->aSec,
- &dest->eFirst, &dest->eSec,
- &dest->MFirst, &dest->MSec);
-
- return(1);
-}
-
-
-int fgSolarSystemInit(fgTIME t)
-{
- string path, gzpath;
- int i, ret_val;
-
- fgPrintf( FG_ASTRO, FG_INFO, "Initializing solar system\n");
-
- /* build the full path name to the orbital elements database file */
- path = current_options.get_fg_root() + "/Astro/planets";
- gzpath = path + ".gz";
-
- if ( (data = fgopen(path.c_str(), "rb")) == NULL ) {
- if ( (data = fgopen(gzpath.c_str(), "rb")) == NULL ) {
- fgPrintf( FG_ASTRO, FG_EXIT,
- "Cannot open data file: '%s'\n", path.c_str());
- }
- }
-
- /* printf(" reading datafile %s\n", path); */
- fgPrintf( FG_ASTRO, FG_INFO, " reading datafile %s\n", path.c_str());
-
- /* for all the objects... */
- for (i = 0; i < 9; i ++) {
- /* ...read from the data file ... */
- if (!(fgReadOrbElements (&pltOrbElements[i], data))) {
- ret_val = 0;
- }
- /* ...and calculate the actual values */
- fgSolarSystemUpdate(&pltOrbElements[i], t);
- }
-
- fgclose(data);
-
- return ( 1 );
-}
-
-
-void fgSolarSystemUpdate(struct OrbElements *planet, fgTIME t)
-{
- double
- actTime;
-
- actTime = fgCalcActTime(t);
-
- /* calculate the actual orbital elements */
- planet->M = DEG_TO_RAD * (planet->MFirst + (planet->MSec * actTime));
- planet->w = DEG_TO_RAD * (planet->wFirst + (planet->wSec * actTime));
- planet->N = DEG_TO_RAD * (planet->NFirst + (planet->NSec * actTime));
- planet->i = DEG_TO_RAD * (planet->iFirst + (planet->iSec * actTime));
- planet->e = planet->eFirst + (planet->eSec * actTime);
- planet->a = planet->aFirst + (planet->aSec * actTime);
-}
-
-
-/* $Log$
-/* Revision 1.10 1998/08/27 17:02:00 curt
-/* Contributions from Bernie Bright <bbright@c031.aone.net.au>
-/* - use strings for fg_root and airport_id and added methods to return
-/* them as strings,
-/* - inlined all access methods,
-/* - made the parsing functions private methods,
-/* - deleted some unused functions.
-/* - propogated some of these changes out a bit further.
-/*
- * Revision 1.9 1998/08/25 20:53:28 curt
- * Shuffled $FG_ROOT file layout.
- *
- * Revision 1.8 1998/08/22 01:18:59 curt
- * Minor tweaks to avoid using unitialized memory.
- *
- * Revision 1.7 1998/07/13 21:00:09 curt
- * Wrote access functions for current fgOPTIONS.
- *
- * Revision 1.6 1998/05/29 20:35:41 curt
- * Added zlib support for reading in compressed data files.
- *
- * Revision 1.5 1998/05/13 18:25:34 curt
- * Root path info moved to fgOPTIONS.
- *
- * Revision 1.4 1998/04/28 01:19:00 curt
- * Type-ified fgTIME and fgVIEW
- *
- * Revision 1.3 1998/04/25 22:06:25 curt
- * Edited cvs log messages in source files ... bad bad bad!
- *
- * Revision 1.2 1998/04/24 00:45:01 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:29 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.10 1998/04/18 04:13:57 curt
- * Moved fg_debug.c to it's own library.
- *
- * Revision 1.9 1998/03/14 00:27:12 curt
- * Updated fgGENERAL to a "type" of struct.
- *
- * Revision 1.8 1998/02/23 19:07:55 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.7 1998/02/12 21:59:33 curt
- * Incorporated code changes contributed by Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.6 1998/02/03 23:20:11 curt
- * Lots of little tweaks to fix various consistency problems discovered by
- * Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
- * passed arguments along to the real printf(). Also incorporated HUD changes
- * by Michele America.
- *
- * Revision 1.5 1998/02/02 20:53:22 curt
- * To version 0.29
- *
- * Revision 1.4 1998/01/27 00:47:47 curt
- * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
- * system and commandline/config file processing code.
- *
- * Revision 1.3 1998/01/22 02:59:27 curt
- * Changed #ifdef FILE_H to #ifdef _FILE_H
- *
- * Revision 1.2 1998/01/19 19:26:58 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.1 1998/01/07 03:16:17 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.6 1997/12/30 20:47:52 curt
- * Integrated new event manager with subsystem initializations.
- *
- * Revision 1.5 1997/12/15 23:55:02 curt
- * Add xgl wrappers for debugging.
- * Generate terrain normals on the fly.
- *
- * Revision 1.4 1997/12/10 22:37:51 curt
- * Prepended "fg" on the name of all global structures that didn't have it yet.
- * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
- *
- * Revision 1.3 1997/11/25 23:20:44 curt
- * Changed planets.dat Planets.dat
- *
- * Revision 1.2 1997/11/25 19:25:36 curt
- * Changes to integrate Durk's moon/sun code updates + clean up.
- *
- * Revision 1.1 1997/10/25 03:16:10 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
+++ /dev/null
-/**************************************************************************
- * orbits.h - calculates the orbital elements of the sun, moon and planets.
- * For inclusion in flight gear
- *
- * Written 1997 by Durk Talsma, started October 19, 1997.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifndef _ORBITS_HXX
-#define _ORBITS_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-#include <stdio.h>
-#include <math.h>
-
-#include <Time/fg_time.hxx>
-
-
-
-//#define STANDARDEPOCH 2000
-
-typedef struct {
- double xs;
- double ys;
- double dist;
- double lonSun;
-} fgSUNPOS;
-
-extern fgSUNPOS solarPosition;
-
-
-struct OrbElements {
- double NFirst; /* longitude of the ascending node first part */
- double NSec; /* longitude of the ascending node second part */
- double iFirst; /* inclination to the ecliptic first part */
- double iSec; /* inclination to the ecliptic second part */
- double wFirst; /* first part of argument of perihelion */
- double wSec; /* second part of argument of perihelion */
- double aFirst; /* semimayor axis first part*/
- double aSec; /* semimayor axis second part */
- double eFirst; /* eccentricity first part */
- double eSec; /* eccentricity second part */
- double MFirst; /* Mean anomaly first part */
- double MSec; /* Mean anomaly second part */
-
- double N, i, w, a, e, M; /* the resultant orbital elements, obtained from the former */
-};
-
-struct CelestialCoord {
- double RightAscension;
- double Declination;
- double distance;
- double magnitude;
-};
-
-
-double fgCalcEccAnom(double M, double e);
-double fgCalcActTime(fgTIME t);
-
-int fgReadOrbElements (struct OrbElements *dest, FILE * src);
-int fgSolarSystemInit(fgTIME t);
-void fgSolarSystemUpdate(struct OrbElements *planets, fgTIME t);
-
-
-#endif /* _ORBITS_HXX */
-
-
-/* $Log$
-/* Revision 1.3 1998/04/28 01:19:01 curt
-/* Type-ified fgTIME and fgVIEW
-/*
- * Revision 1.2 1998/04/24 00:45:01 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:30 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.7 1998/04/21 17:02:31 curt
- * Prepairing for C++ integration.
- *
- * Revision 1.6 1998/02/23 19:07:55 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.5 1998/02/12 21:59:35 curt
- * Incorporated code changes contributed by Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.4 1998/02/02 20:53:22 curt
- * To version 0.29
- *
- * Revision 1.3 1998/01/22 02:59:27 curt
- * Changed #ifdef FILE_H to #ifdef _FILE_H
- *
- * Revision 1.2 1998/01/19 19:26:58 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.1 1998/01/07 03:16:17 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.2 1997/12/30 16:36:52 curt
- * Merged in Durk's changes ...
- *
- * Revision 1.1 1997/10/25 03:16:10 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
+++ /dev/null
-/**************************************************************************
- * planets.c
- *
- * Written 1997 by Durk Talsma, started October, 1997. For the flight gear
- * project.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <XGL/xgl.h>
-
-#include <Debug/fg_debug.h>
-#include <Include/fg_constants.h>
-#include <Time/fg_time.hxx>
-#include <Time/light.hxx>
-
-#include "orbits.hxx"
-#include "planets.hxx"
-#include "sun.hxx"
-
-GLint planets = 0;
-
-void fgCalculatePlanet(struct OrbElements planet, struct OrbElements theSun,
- fgTIME t, int idx, struct CelestialCoord *result)
-{
- // struct CelestialCoord result;
-
- // fgSUNPOS SolarPosition;
-
- double eccAnom, r, v, ecl, actTime, R, s, ir, Nr, B, FV, ring_magn,
- xv, yv, xh, yh, zh, xg, yg, zg, xe, ye, ze;
-
- actTime = fgCalcActTime(t);
- /*calculate the angle between ecliptic and equatorial coordinate system */
- ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime);
-
- /* calculate the eccentric anomaly */
- eccAnom = fgCalcEccAnom(planet.M, planet.e);
-
- /* calculate the planets distance (r) and true anomaly (v) */
- xv = planet.a * (cos(eccAnom) - planet.e);
- yv = planet.a * (sqrt(1.0 - planet.e*planet.e) * sin(eccAnom));
- v = atan2(yv, xv);
- r = sqrt ( xv*xv + yv*yv);
-
- /* calculate the planets position in 3-dimensional space */
- xh = r * (cos (planet.N) * cos (v + planet.w) -
- sin (planet.N) * sin (v + planet.w) * cos (planet.i));
- yh = r * (sin (planet.N) * cos (v + planet.w) +
- cos (planet.N) * sin (v + planet.w) * cos (planet.i));
- zh = r * ( sin(v+planet.w) * sin(planet.i));
-
- /* calculate the ecliptic longitude and latitude */
-
- xg = xh + solarPosition.xs;
- yg = yh + solarPosition.ys;
- zg = zh;
-
- xe = xg;
- ye = yg * cos(ecl) - zg * sin(ecl);
- ze = yg * sin(ecl) + zg * cos(ecl);
-
- result->RightAscension = atan2(ye,xe);
- result->Declination = atan2(ze, sqrt(xe*xe + ye*ye));
-
- /* Let's calculate the brightness of the planet */
- R = sqrt ( xg*xg + yg*yg + zg*zg);
- s = solarPosition.dist;
- FV = acos( (r*r + R*R - s*s) / (2*r*R));
- FV *= 57.29578; /* convert radians to degrees */
- switch(idx)
- {
- case 2: /* mercury */
- result->magnitude = -0.36 + 5*log10( r*R ) + 0.027 * FV + 2.2E-13 * pow(FV, 6);
- break;
- case 3: /*venus */
- result->magnitude = -4.34 + 5*log10( r*R ) + 0.013 * FV + 4.2E-07 * pow(FV,3);
- break;
- case 4: /* mars */
- result->magnitude = -1.51 + 5*log10( r*R ) + 0.016 * FV;
- break;
- case 5: /* Jupiter */
- result->magnitude = -9.25 + 5*log10( r*R ) + 0.014 * FV;
- break;
- case 6: /* Saturn */
-
- ir = 0.4897394;
- Nr = 2.9585076 + 6.6672E-7*actTime;
-
- B = asin (sin (result->Declination) * cos (ir) -
- cos (result->Declination) * sin (ir) *
- sin (result->RightAscension - Nr));
- ring_magn = -2.6 * sin (fabs(B)) + 1.2 * pow(sin(B),2);
- result->magnitude = -9.0 + 5*log10( r*R ) + 0.044 * FV + ring_magn;
- break;
- case 7: /* Uranus */
- result->magnitude = -7.15 + 5*log10( r*R) + 0.001 * FV;
- break;
- case 8: /* Neptune */
- result->magnitude = -6.90 + 5*log10 (r*R) + 0.001 *FV;
- break;
- default:
- fgPrintf( FG_ASTRO, FG_ALERT, "index %d out of range !!!!\n", idx);
- }
- fgPrintf( FG_ASTRO, FG_DEBUG,
- " Planet found at %f (ra), %f (dec)\n",
- result->RightAscension, result->Declination);
- fgPrintf( FG_ASTRO, FG_DEBUG,
- " Geocentric dist %f\n"
- " Heliocentric dist %f\n"
- " Distance to the sun %f\n"
- " Phase angle %f\n"
- " Brightness %f\n", R, r, s, FV, result->magnitude);
-
- // return result;
-}
-
-
-void fgPlanetsInit( void )
-{
- fgLIGHT *l;
- int i;
- struct CelestialCoord pltPos;
- double magnitude;
-
- l = &cur_light_params;
- /* if the display list was already built during a previous init,
- then recycle it */
-
- if (planets) {
- xglDeleteLists(planets, 1);
- }
-
- planets = xglGenLists(1);
- xglNewList( planets, GL_COMPILE );
- xglBegin( GL_POINTS );
-
-
- /* Add the planets to all four display lists */
- for ( i = 2; i < 9; i++ ) {
- fgSolarSystemUpdate(&(pltOrbElements[i]), cur_time_params);
- fgCalculatePlanet(pltOrbElements[i], pltOrbElements[0],
- cur_time_params, i, &pltPos);
-
- magnitude = (0.0 - pltPos.magnitude) / 5.0 + 1.0;
-
- /* scale magnitudes again so they look ok */
- /* magnitude =
- magnitude * 0.7 + (((FG_STAR_LEVELS - 1) - i) * 0.1); */
-
- /* the following statement could be made a little more sopisticated
- for the moment: Stick to this one */
- magnitude = magnitude * 0.7 + (3 * 0.1);
- if ( magnitude > 1.0 ) { magnitude = 1.0; }
- if ( magnitude < 0.0 ) { magnitude = 0.0; }
-
- /* Add planets to the display list, based on sun_angle and current
- magnitude It's pretty experimental... */
-
- if ((double) (l->sun_angle - FG_PI_2) >
- ((magnitude - 1.0) * -20 * DEG_TO_RAD))
- {
- xglColor3f (magnitude, magnitude, magnitude);
- printf ("Sun Angle to Horizon (in Rads) = %f\n",
- (double) (l->sun_angle - FG_PI_2));
- printf ("Transformed Magnitude is :%f %f\n",
- magnitude, (magnitude - 1.0) * -20 * DEG_TO_RAD);
-
- xglVertex3f (50000.0 * cos (pltPos.RightAscension) *
- cos (pltPos.Declination),
- 50000.0 * sin (pltPos.RightAscension) *
- cos (pltPos.Declination),
- 50000.0 * sin (pltPos.Declination));
- }
- }
- xglEnd();
- xglEndList();
-
-}
-
-
-void fgPlanetsRender( void ) {
- xglCallList(planets);
-}
-
-
-/* $Log$
-/* Revision 1.7 1998/08/22 02:01:11 curt
-/* Nailed a uninitialized variable usage bug that was killing us on some
-/* platforms with some compiler options.
-/*
- * Revision 1.6 1998/06/27 16:51:54 curt
- * In fgCalculatePlanet() pass a pointer to a structure to be modified, rather
- * than returning the entire structure.
- *
- * Revision 1.5 1998/04/28 01:19:01 curt
- * Type-ified fgTIME and fgVIEW
- *
- * Revision 1.4 1998/04/26 05:10:01 curt
- * "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
- *
- * Revision 1.3 1998/04/25 22:06:25 curt
- * Edited cvs log messages in source files ... bad bad bad!
- *
- * Revision 1.2 1998/04/24 00:45:02 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:31 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.9 1998/04/18 04:13:57 curt
- * Moved fg_debug.c to it's own library.
- *
- * Revision 1.8 1998/04/03 21:52:50 curt
- * Converting to Gnu autoconf system.
- *
- * Revision 1.7 1998/02/23 19:07:55 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.6 1998/02/12 21:59:36 curt
- * Incorporated code changes contributed by Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.5 1998/02/03 23:20:12 curt
- * Lots of little tweaks to fix various consistency problems discovered by
- * Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
- * passed arguments along to the real printf(). Also incorporated HUD changes
- * by Michele America.
- *
- * Revision 1.4 1998/02/02 20:53:23 curt
- * To version 0.29
- *
- * Revision 1.3 1998/01/27 00:47:47 curt
- * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
- * system and commandline/config file processing code.
- *
- * Revision 1.2 1998/01/19 19:26:59 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.1 1998/01/07 03:16:18 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.4 1997/12/30 20:47:52 curt
- * Integrated new event manager with subsystem initializations.
- *
- * Revision 1.3 1997/12/30 16:36:52 curt
- * Merged in Durk's changes ...
- *
- * Revision 1.2 1997/12/12 21:41:29 curt
- * More light/material property tweaking ... still a ways off.
- *
- * Revision 1.1 1997/10/25 03:16:10 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
-
-
+++ /dev/null
-/**************************************************************************
- * planets.hxx
- *
- * Written 1997 by Durk Talsma, started October, 1997. For the flight gear
- * project.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifndef _PLANETS_HXX
-#define _PLANETS_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-void fgCalculatePlanet(struct OrbElements planet, struct OrbElements theSun,
- fgTIME t, int idx, struct CelestialCoord *result);
-
-void fgPlanetsInit( void );
-void fgPlanetsRender( void );
-
-
-#endif /* PLANETS_HXX */
-
-
-/* $Log$
-/* Revision 1.3 1998/06/27 16:51:54 curt
-/* In fgCalculatePlanet() pass a pointer to a structure to be modified, rather
-/* than returning the entire structure.
-/*
- * Revision 1.2 1998/04/28 01:19:02 curt
- * Type-ified fgTIME and fgVIEW
- *
- * Revision 1.1 1998/04/22 13:21:32 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.5 1998/04/21 17:02:31 curt
- * Prepairing for C++ integration.
- *
- * Revision 1.4 1998/02/12 21:59:38 curt
- * Incorporated code changes contributed by Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.3 1998/02/02 20:53:23 curt
- * To version 0.29
- *
- * Revision 1.2 1998/01/22 02:59:28 curt
- * Changed #ifdef FILE_H to #ifdef _FILE_H
- *
- * Revision 1.1 1998/01/07 03:16:18 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.3 1997/12/30 16:36:53 curt
- * Merged in Durk's changes ...
- *
- * Revision 1.2 1997/12/12 21:41:30 curt
- * More light/material property tweaking ... still a ways off.
- *
- * Revision 1.1 1997/10/25 03:16:11 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
--- /dev/null
+/**************************************************************************
+ * pluto.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _PLUTO_HXX_
+#define _PLUTO_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+
+class Pluto : public CelestialBody
+{
+public:
+ Pluto ( fgTIME t);
+};
+
+#endif // _PLUTO_HXX_
--- /dev/null
+/**************************************************************************
+ * saturn.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "saturn.hxx"
+
+/*************************************************************************
+ * Saturn::Saturn(fgTIME *t)
+ * Public constructor for class Saturn
+ * Argument: The current time.
+ * the hard coded orbital elements for Saturn are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Saturn::Saturn(fgTIME *t) :
+ CelestialBody(113.6634, 2.3898000E-5,
+ 2.4886, -1.081E-7,
+ 339.3939, 2.9766100E-5,
+ 9.5547500, 0.000000,
+ 0.055546, -9.499E-9,
+ 316.9670, 0.03344422820, t)
+{
+}
+
+/*************************************************************************
+ * void Saturn::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Saturn, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Saturn specific equation
+ *************************************************************************/
+void Saturn::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+
+ double actTime = fgCalcActTime(t);
+ double ir = 0.4897394;
+ double Nr = 2.9585076 + 6.6672E-7*actTime;
+ double B = asin (sin(declination) * cos(ir) -
+ cos(declination) * sin(ir) *
+ sin(rightAscension - Nr));
+ double ring_magn = -2.6 * sin(fabs(B)) + 1.2 * pow(sin(B), 2);
+ magnitude = -9.0 + 5*log10(r*R) + 0.044 * FV + ring_magn;
+}
+
--- /dev/null
+/**************************************************************************
+ * saturn.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _SATURN_HXX_
+#define _SATURN_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Saturn : public CelestialBody
+{
+public:
+ Saturn ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+#endif // _SATURN_HXX_
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * 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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include <GL/glut.h>
+#include <XGL/xgl.h>
+#include <Debug/fg_debug.h>
+#include <Time/sunpos.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)
+ {
+ fgPrintf(FG_GENERAL, FG_EXIT, "Error: only one solarsystem allowed\n");
+ }
+ 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;
+ danger: Huge Explosions ahead! (-:))
+ ------------------------------------------------------------------------*/
+SolarSystem::~SolarSystem()
+{
+ delete ourSun;
+ delete earthsMoon;
+ delete mercury;
+ delete venus;
+ delete mars;
+ delete jupiter;
+ delete saturn;
+ delete uranus;
+ delete neptune;
+ //delete pluto;
+}
+/****************************************************************************
+ * 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 = &cur_time_params;
+ float x, y, z,
+ xx, yy,zz;
+ double ra, dec;
+ double x_2, x_4, x_8, x_10;
+ double magnitude;
+ GLfloat ambient;
+ GLfloat amb[4];
+ GLfloat moonColor[4] = {0.85, 0.75, 0.35, 1.0};
+ GLfloat black[4] = {0.0, 0.0,0.0,1.0};
+ GLfloat white[4] = {1.0, 1.0,1.0,1.0};
+
+ // 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.
+ if (displayList)
+ xglDeleteLists(displayList, 1);
+
+ displayList = xglGenLists(1);
+ // Step 2: rebuild the display list
+ xglNewList( displayList, GL_COMPILE);
+ {
+ // Step 2a: Add the moon...
+ xglEnable( GL_LIGHTING );
+ xglEnable( GL_LIGHT0 );
+ // set lighting parameters
+ xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
+ xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
+ xglEnable( GL_CULL_FACE );
+
+ // Enable blending, in order to effectively eliminate the dark side of the
+ // moon
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ONE, GL_ONE);
+ earthsMoon->getPos(&ra, &dec);
+ x = 60000.0 * cos(ra) * cos (dec);
+ y = 60000.0 * sin(ra) * cos (dec);
+ z = 60000.0 * sin(dec);
+ xx = cos(ra) * cos(dec);
+ yy = sin(ra) * cos(dec);
+ zz = sin(dec);
+ xglMaterialfv(GL_FRONT, GL_AMBIENT, black);
+ xglMaterialfv(GL_FRONT, GL_DIFFUSE, moonColor);
+ xglPushMatrix();
+ {
+ earthsMoon->newImage(ra,dec);
+ }
+ xglPopMatrix();
+ glDisable(GL_BLEND);
+ xglDisable(GL_LIGHTING);
+
+ // Step 2b: Add the sun
+ x_2 = l -> sun_angle * l->sun_angle;
+ x_4 = x_2 * x_2;
+ x_8 = x_4 * x_4;
+ x_10 = x_8 * x_2;
+ ambient = (0.4 * pow (1.1, - x_10 / 30.0));
+ if (ambient < 0.3) ambient = 0.3;
+ if (ambient > 1.0) ambient = 1.0;
+
+ amb[0] = 0.00 + ((ambient * 6.0) - 1.0); // minimum value = 0.8
+ amb[1] = 0.00 + ((ambient * 11.0) - 3.0); // minimum value = 0.3
+ amb[2] = 0.00 + ((ambient * 12.0) - 3.6); // minimum value = 0.0
+ amb[3] = 1.00;
+
+ if (amb[0] > 1.0) amb[0] = 1.0;
+ if (amb[1] > 1.0) amb[1] = 1.0;
+ if (amb[2] > 1.0) amb[2] = 1.0;
+
+ ourSun->getPos(&ra, &dec);
+ x = 60000.0 * cos(ra) * cos(dec);
+ y = 60000.0 * sin(ra) * cos(dec);
+ z = 60000.0 * sin(dec);
+ xglPushMatrix();
+ {
+ // xglPushMatrix();
+ xglTranslatef(x,y,z);
+ xglColor3f(amb[0], amb[1], amb[2]);
+ glutSolidSphere(1400.0, 10, 10);
+ }
+ glPopMatrix();
+ // 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();
+}
+
+/*****************************************************************************
+ * 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 ((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));
+ }
+}
+
+
+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();
+}
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * 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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include <GL/glut.h>
+#include <XGL/xgl.h>
+#include <Debug/fg_debug.h>
+#include <Time/sunpos.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)
+ {
+ fgPrintf(FG_GENERAL, FG_EXIT, "Error: only one solarsystem allowed\n");
+ }
+ 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;
+ danger: Huge Explosions ahead! (-:))
+ ------------------------------------------------------------------------*/
+SolarSystem::~SolarSystem()
+{
+ delete ourSun;
+ delete earthsMoon;
+ delete mercury;
+ delete venus;
+ delete mars;
+ delete jupiter;
+ delete saturn;
+ delete uranus;
+ delete neptune;
+ //delete pluto;
+}
+/****************************************************************************
+ * 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 = &cur_time_params;
+ float x, y, z,
+ xx, yy,zz;
+ double ra, dec;
+ double x_2, x_4, x_8, x_10;
+ double magnitude;
+ GLfloat ambient;
+ GLfloat amb[4];
+ GLfloat moonColor[4] = {0.85, 0.75, 0.35, 1.0};
+ GLfloat black[4] = {0.0, 0.0,0.0,1.0};
+ GLfloat white[4] = {1.0, 1.0,1.0,1.0};
+
+ // 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.
+ if (displayList)
+ xglDeleteLists(displayList, 1);
+
+ displayList = xglGenLists(1);
+ // Step 2: rebuild the display list
+ xglNewList( displayList, GL_COMPILE);
+ {
+ // Step 2a: Add the moon...
+ xglEnable( GL_LIGHTING );
+ xglEnable( GL_LIGHT0 );
+ // set lighting parameters
+ xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
+ xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
+ xglEnable( GL_CULL_FACE );
+
+ // Enable blending, in order to effectively eliminate the dark side of the
+ // moon
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_ONE, GL_ONE);
+ earthsMoon->getPos(&ra, &dec);
+ x = 60000.0 * cos(ra) * cos (dec);
+ y = 60000.0 * sin(ra) * cos (dec);
+ z = 60000.0 * sin(dec);
+ xx = cos(ra) * cos(dec);
+ yy = sin(ra) * cos(dec);
+ zz = sin(dec);
+ xglMaterialfv(GL_FRONT, GL_AMBIENT, black);
+ xglMaterialfv(GL_FRONT, GL_DIFFUSE, moonColor);
+ xglPushMatrix();
+ {
+ earthsMoon->newImage(ra,dec);
+ }
+ xglPopMatrix();
+ glDisable(GL_BLEND);
+ xglDisable(GL_LIGHTING);
+
+ // Step 2b: Add the sun
+ x_2 = l -> sun_angle * l->sun_angle;
+ x_4 = x_2 * x_2;
+ x_8 = x_4 * x_4;
+ x_10 = x_8 * x_2;
+ ambient = (0.4 * pow (1.1, - x_10 / 30.0));
+ if (ambient < 0.3) ambient = 0.3;
+ if (ambient > 1.0) ambient = 1.0;
+
+ amb[0] = 0.00 + ((ambient * 6.0) - 1.0); // minimum value = 0.8
+ amb[1] = 0.00 + ((ambient * 11.0) - 3.0); // minimum value = 0.3
+ amb[2] = 0.00 + ((ambient * 12.0) - 3.6); // minimum value = 0.0
+ amb[3] = 1.00;
+
+ if (amb[0] > 1.0) amb[0] = 1.0;
+ if (amb[1] > 1.0) amb[1] = 1.0;
+ if (amb[2] > 1.0) amb[2] = 1.0;
+
+ ourSun->getPos(&ra, &dec);
+ x = 60000.0 * cos(ra) * cos(dec);
+ y = 60000.0 * sin(ra) * cos(dec);
+ z = 60000.0 * sin(dec);
+ xglPushMatrix();
+ {
+ xglPushMatrix();
+ xglTranslatef(x,y,z);
+ xglColor3f(amb[0], amb[1], amb[2]);
+ glutSolidSphere(1400.0, 10, 10);
+ }
+ glPopMatrix();
+ // 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();
+}
+
+/*****************************************************************************
+ * 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 ((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));
+ }
+}
+
+
+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();
+}
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * 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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#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"
+
+
+extern fgLIGHT cur_light_params;
+extern fgTIME cur_time_params;
+extern fgVIEW current_view;
+
+
+
+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);
+ Star *getSun();
+ ~SolarSystem();
+
+ static SolarSystem *theSolarSystem; // thanks to Bernie Bright!
+ void rebuild();
+ friend void solarSystemRebuild();
+ void draw();
+
+};
+
+inline Star * SolarSystem::getSun()
+{
+ return ourSun;
+}
+
+inline void SolarSystem::draw()
+{
+ xglCallList(displayList);
+}
+
+extern void solarSystemRebuild();
+
+#endif // _SOLARSYSTEM_H_
+
+
+
+
+
+
+
+
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * star.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "star.hxx"
+
+/*************************************************************************
+ * Star::Star(fgTIME *t)
+ * Public constructor for class Star
+ * Argument: The current time.
+ * the hard coded orbital elements our sun are passed to
+ * CelestialBody::CelestialBody();
+ * note that the word sun is avoided, in order to prevent some compilation
+ * problems on sun systems
+ ************************************************************************/
+Star::Star(fgTIME *t) :
+ CelestialBody (0.000000, 0.0000000000,
+ 0.0000, 0.00000,
+ 282.9404, 4.7093500E-5,
+ 1.0000000, 0.000000,
+ 0.016709, -1.151E-9,
+ 356.0470, 0.98560025850, t)
+{
+}
+/*************************************************************************
+ * void Jupiter::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of our sun.
+ *************************************************************************/
+void Star::updatePosition(fgTIME *t)
+{
+ double
+ actTime, eccAnom,
+ xv, yv, v, r,
+ xe, ye, ze, ecl;
+
+ updateOrbElements(t);
+
+ actTime = fgCalcActTime(t);
+ ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime); // Angle in Radians
+ eccAnom = fgCalcEccAnom(M, e); // Calculate the eccentric Anomaly (also known as solving Kepler's equation)
+
+ xv = cos(eccAnom) - e;
+ yv = sqrt (1.0 - e*e) * sin(eccAnom);
+ v = atan2 (yv, xv); // the sun's true anomaly
+ r = sqrt (xv*xv + yv*yv); // and its distance
+
+ longitude = v + w; // the sun's true longitude
+
+ // convert the sun's true longitude to ecliptic rectangular
+ // geocentric coordinates (xs, ys)
+ xs = r * cos (longitude);
+ ys = r * sin (longitude);
+
+ // convert ecliptic coordinates to equatorial rectangular
+ // geocentric coordinates
+
+ xe = xs;
+ ye = ys * cos (ecl);
+ ze = ys * sin (ecl);
+
+ // And finally, calculate right ascension and declination
+ rightAscension = atan2 (ye, xe);
+ declination = atan2 (ze, sqrt (xe*xe + ye*ye));
+}
+
+
+
+
+
--- /dev/null
+/**************************************************************************
+ * star.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _STAR_HXX_
+#define _STAR_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+
+
+class Star : public CelestialBody
+{
+private:
+ double longitude; // the sun's true longitude
+ double xs, ys; // the sun's rectangular geocentric coordinates
+ double distance; // the sun's distance to the earth
+
+public:
+ Star (fgTIME *t);
+ void updatePosition(fgTIME *t);
+ double getM();
+ double getw();
+ double getLon();
+ double getxs();
+ double getys();
+ double getDistance();
+};
+
+
+
+inline double Star::getM()
+{
+ return M;
+}
+
+inline double Star::getw()
+{
+ return w;
+}
+
+inline double Star::getLon()
+{
+ return longitude;
+}
+
+inline double Star::getxs()
+{
+ return xs;
+}
+
+inline double Star::getys()
+{
+ return ys;
+}
+
+inline double Star::getDistance()
+{
+ return distance;
+}
+
+
+#endif // _STAR_HXX_
+
+
+
+
+
+
+
+
+
+
+
+
+
+
#include <Misc/stopwatch.hxx>
#include <Time/fg_time.hxx>
-#include "orbits.hxx"
-#include "planets.hxx"
+// #include "orbits.hxx"
+// #include "planets.hxx"
#include "stars.hxx"
/* $Log$
-/* Revision 1.13 1998/09/01 19:03:04 curt
-/* Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
-/* - The new classes in libmisc.tgz define a stream interface into zlib.
-/* I've put these in a new directory, Lib/Misc. Feel free to rename it
-/* to something more appropriate. However you'll have to change the
-/* include directives in all the other files. Additionally you'll have
-/* add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
-/*
-/* The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
-/* test so I've included the required changes in config.tgz.
-/*
-/* There are a fair few changes to Simulator/Objects as I've moved
-/* things around. Loading tiles is quicker but thats not where the delay
-/* is. Tile loading takes a few tenths of a second per file on a P200
-/* but it seems to be the post-processing that leads to a noticeable
-/* blip in framerate. I suppose its time to start profiling to see where
-/* the delays are.
-/*
-/* I've included a brief description of each archives contents.
-/*
-/* Lib/Misc/
-/* zfstream.cxx
-/* zfstream.hxx
-/* C++ stream interface into zlib.
-/* Taken from zlib-1.1.3/contrib/iostream/.
-/* Minor mods for STL compatibility.
-/* There's no copyright associated with these so I assume they're
-/* covered by zlib's.
-/*
-/* fgstream.cxx
-/* fgstream.hxx
-/* FlightGear input stream using gz_ifstream. Tries to open the
-/* given filename. If that fails then filename is examined and a
-/* ".gz" suffix is removed or appended and that file is opened.
-/*
-/* stopwatch.hxx
-/* A simple timer for benchmarking. Not used in production code.
-/* Taken from the Blitz++ project. Covered by GPL.
-/*
-/* strutils.cxx
-/* strutils.hxx
-/* Some simple string manipulation routines.
-/*
-/* Simulator/Airports/
-/* Load airports database using fgstream.
-/* Changed fgAIRPORTS to use set<> instead of map<>.
-/* Added bool fgAIRPORTS::search() as a neater way doing the lookup.
-/* Returns true if found.
-/*
-/* Simulator/Astro/
-/* Modified fgStarsInit() to load stars database using fgstream.
-/*
-/* Simulator/Objects/
-/* Modified fgObjLoad() to use fgstream.
-/* Modified fgMATERIAL_MGR::load_lib() to use fgstream.
-/* Many changes to fgMATERIAL.
-/* Some changes to fgFRAGMENT but I forget what!
+/* Revision 1.14 1998/09/15 04:26:22 curt
+/* New textured moon and rewritten/restructured Astro code contributed by Durk
+/* Talsma.
/*
+ * Revision 1.13 1998/09/01 19:03:04 curt
+ * Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
+ * - The new classes in libmisc.tgz define a stream interface into zlib.
+ * I've put these in a new directory, Lib/Misc. Feel free to rename it
+ * to something more appropriate. However you'll have to change the
+ * include directives in all the other files. Additionally you'll have
+ * add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
+ *
+ * The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
+ * test so I've included the required changes in config.tgz.
+ *
+ * There are a fair few changes to Simulator/Objects as I've moved
+ * things around. Loading tiles is quicker but thats not where the delay
+ * is. Tile loading takes a few tenths of a second per file on a P200
+ * but it seems to be the post-processing that leads to a noticeable
+ * blip in framerate. I suppose its time to start profiling to see where
+ * the delays are.
+ *
+ * I've included a brief description of each archives contents.
+ *
+ * Lib/Misc/
+ * zfstream.cxx
+ * zfstream.hxx
+ * C++ stream interface into zlib.
+ * Taken from zlib-1.1.3/contrib/iostream/.
+ * Minor mods for STL compatibility.
+ * There's no copyright associated with these so I assume they're
+ * covered by zlib's.
+ *
+ * fgstream.cxx
+ * fgstream.hxx
+ * FlightGear input stream using gz_ifstream. Tries to open the
+ * given filename. If that fails then filename is examined and a
+ * ".gz" suffix is removed or appended and that file is opened.
+ *
+ * stopwatch.hxx
+ * A simple timer for benchmarking. Not used in production code.
+ * Taken from the Blitz++ project. Covered by GPL.
+ *
+ * strutils.cxx
+ * strutils.hxx
+ * Some simple string manipulation routines.
+ *
+ * Simulator/Airports/
+ * Load airports database using fgstream.
+ * Changed fgAIRPORTS to use set<> instead of map<>.
+ * Added bool fgAIRPORTS::search() as a neater way doing the lookup.
+ * Returns true if found.
+ *
+ * Simulator/Astro/
+ * Modified fgStarsInit() to load stars database using fgstream.
+ *
+ * Simulator/Objects/
+ * Modified fgObjLoad() to use fgstream.
+ * Modified fgMATERIAL_MGR::load_lib() to use fgstream.
+ * Many changes to fgMATERIAL.
+ * Some changes to fgFRAGMENT but I forget what!
+ *
* Revision 1.12 1998/08/27 17:02:01 curt
* Contributions from Bernie Bright <bbright@c031.aone.net.au>
* - use strings for fg_root and airport_id and added methods to return
# error This library requires C++
#endif
+#include <Time/fg_time.hxx>
#define FG_STAR_LEVELS 8 /* how many star transitions */
/* $Log$
-/* Revision 1.3 1998/08/06 12:45:20 curt
-/* Modified to bring in stars in 8 increments based on magnitude, not number
-/* of stars.
+/* Revision 1.4 1998/09/15 04:26:23 curt
+/* New textured moon and rewritten/restructured Astro code contributed by Durk
+/* Talsma.
/*
+ * Revision 1.3 1998/08/06 12:45:20 curt
+ * Modified to bring in stars in 8 increments based on magnitude, not number
+ * of stars.
+ *
* Revision 1.2 1998/04/28 01:19:03 curt
* Type-ified fgTIME and fgVIEW
*
+++ /dev/null
-/**************************************************************************
- * sun.c
- *
- * Written 1997 by Durk Talsma, started October, 1997. For the flight gear
- * project.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <XGL/xgl.h>
-
-#include <Debug/fg_debug.h>
-#include <Include/fg_constants.h>
-#include <Main/views.hxx>
-#include <Time/fg_time.hxx>
-#include <Time/sunpos.hxx>
-
-#include "orbits.hxx"
-#include "sun.hxx"
-
-
-GLint sun_obj = 0;
-
-static struct CelestialCoord sunPos;
-
-fgSUNPOS solarPosition;
-
-void fgCalcSunPos(struct OrbElements params)
-{
- double EccAnom, xv, yv, v, r;
-
- /* calculate the eccentric anomaly */
- EccAnom = fgCalcEccAnom(params.M, params.e);
-
- /* calculate the Suns distance (r) and its true anomaly (v) */
- xv = cos(EccAnom) - params.e;
- yv = sqrt(1.0 - params.e*params.e) * sin(EccAnom);
- v = atan2(yv, xv);
- r = sqrt(xv*xv + yv*yv);
-
- /* calculate the the Sun's true longitude (lonsun) */
- solarPosition.lonSun = v + params.w;
-
- /* convert true longitude and distance to ecliptic rectangular
- geocentric coordinates (xs, ys) */
- solarPosition.xs = r * cos (solarPosition.lonSun);
- solarPosition.ys = r * sin (solarPosition.lonSun);
- solarPosition.dist = r;
- /* return solarPosition; */
-}
-
-
-struct CelestialCoord fgCalculateSun (struct OrbElements params,
- fgTIME t)
-{
- struct CelestialCoord result;
- double xe, ye, ze, ecl, actTime;
-
- /* calculate the angle between ecliptic and equatorial coordinate
- * system */
- actTime = fgCalcActTime (t);
- ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime); // Angle now in Rads
-
- /* calculate the sun's ecliptic position */
- fgCalcSunPos (params);
-
- /* convert ecliptic coordinates to equatorial rectangular
- * geocentric coordinates */
- xe = solarPosition.xs;
- ye = solarPosition.ys * cos (ecl);
- ze = solarPosition.ys * sin (ecl);
-
- /* and finally... Calulate Right Ascention and Declination */
- result.RightAscension = atan2 (ye, xe);
- result.Declination = atan2 (ze, sqrt (xe * xe + ye * ye));
- return result;
-}
-
-
-/* Initialize the Sun */
-void fgSunInit( void ) {
- fgLIGHT *l;
- fgTIME *t;
- fgVIEW *v;
- float xSun, ySun, zSun;
-
- /* GLfloat color[4] = { 1.00, 1.00, 1.00, 1.00 }; */
- double x_2, x_4, x_8, x_10;
- GLfloat ambient;
- GLfloat amb[4];
-
- l = &cur_light_params;
- t = &cur_time_params;
- v = ¤t_view;
-
- fgPrintf( FG_ASTRO, FG_INFO, " Initializing the Sun\n");
-
- // Calculate basic sun position
- fgSolarSystemUpdate(&(pltOrbElements[0]), cur_time_params);
- sunPos = fgCalculateSun(pltOrbElements[0], cur_time_params);
-
- // Calculate additional sun position parameters based on the above
- // position that are needed by other parts of FG
- fgUpdateSunPos();
-
- fgPrintf( FG_ASTRO, FG_INFO,
- "Sun found at %f (ra), %f (dec)\n",
- sunPos.RightAscension, sunPos.Declination);
-
- xSun = 60000.0 * cos(sunPos.RightAscension) * cos(sunPos.Declination);
- ySun = 60000.0 * sin(sunPos.RightAscension) * cos(sunPos.Declination);
- zSun = 60000.0 * sin(sunPos.Declination);
-
-
- if (sun_obj) {
- xglDeleteLists(sun_obj, 1);
- }
-
- /* printf("First time through, creating sun display list\n"); */
-
- sun_obj = xglGenLists(1);
- xglNewList(sun_obj, GL_COMPILE );
-
-
- t = &cur_time_params;
- v = ¤t_view;
- l = &cur_light_params;
-
- x_2 = l->sun_angle * l->sun_angle;
- x_4 = x_2 * x_2;
- x_8 = x_4 * x_4;
- x_10 = x_8 * x_2;
-
- ambient = (0.4 * pow(1.1, -x_10 / 30.0));
- if ( ambient < 0.3 ) ambient = 0.3;
- if ( ambient > 1.0 ) ambient = 1.0;
-
- amb[0] = 0.00 + ((ambient * 6.0) - 1.0); /* minimum val = 0.8 */
- amb[1] = 0.00 + ((ambient * 11.0) - 3.0); /* minimum val = 0.3 */
- amb[2] = 0.00 + ((ambient * 12.0) - 3.6); /* minimum val = 0.0 */
- amb[3] = 1.00;
-
- if (amb[0] > 1.0) amb[0] = 1.0;
- if (amb[1] > 1.0) amb[1] = 1.0;
- if (amb[2] > 1.0) amb[2] = 1.0;
-
- fgPrintf( FG_ASTRO, FG_DEBUG,
- "Color of the sun: %f, %f, %f\n"
- "Ambient value : %f\n"
- "Sun Angle : %f\n" ,
- amb[0], amb[1], amb[2], ambient, l->sun_angle);
-
- xglPushMatrix();
- xglTranslatef(xSun, ySun, zSun);
- xglColor3f(amb[0], amb[1], amb[2]);
- glutSolidSphere(1200.0, 10, 10);
- xglPopMatrix();
- xglEndList();
-}
-
-
-/* Draw the Sun */
-void fgSunRender( void ) {
- xglCallList(sun_obj);
-}
-
-
-/* $Log$
-/* Revision 1.6 1998/07/30 23:43:31 curt
-/* Eliminated glScale call so that glutSolidSphere normals are preserved
-/* correctly. Also made the sun & moon a bit smaller.
-/*
- * Revision 1.5 1998/04/28 01:19:04 curt
- * Type-ified fgTIME and fgVIEW
- *
- * Revision 1.4 1998/04/26 05:10:02 curt
- * "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
- *
- * Revision 1.3 1998/04/25 22:06:26 curt
- * Edited cvs log messages in source files ... bad bad bad!
- *
- * Revision 1.2 1998/04/24 00:45:04 curt
- * Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
- * Fixed a bug when generating sky colors.
- *
- * Revision 1.1 1998/04/22 13:21:36 curt
- * C++ - ifing the code a bit.
- *
- * Revision 1.10 1998/04/18 04:13:58 curt
- * Moved fg_debug.c to it's own library.
- *
- * Revision 1.9 1998/04/03 21:52:51 curt
- * Converting to Gnu autoconf system.
- *
- * Revision 1.8 1998/03/09 22:47:25 curt
- * Incorporated Durk's updates.
- *
- * Revision 1.7 1998/02/23 19:07:56 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.6 1998/02/12 21:59:39 curt
- * Incorporated code changes contributed by Charlie Hotchkiss
- * <chotchkiss@namg.us.anritsu.com>
- *
- * Revision 1.5 1998/02/02 20:53:24 curt
- * To version 0.29
- *
- * Revision 1.4 1998/01/27 00:47:50 curt
- * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
- * system and commandline/config file processing code.
- *
- * Revision 1.3 1998/01/19 19:27:00 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.2 1998/01/19 18:40:18 curt
- * Tons of little changes to clean up the code and to remove fatal errors
- * when building with the c++ compiler.
- *
- * Revision 1.1 1998/01/07 03:16:20 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.12 1998/01/05 18:44:36 curt
- * Add an option to advance/decrease time from keyboard.
- *
- * Revision 1.11 1997/12/30 23:09:40 curt
- * Worked on winding problem without luck, so back to calling glFrontFace()
- * 3 times for each scenery area.
- *
- * Revision 1.10 1997/12/30 20:47:54 curt
- * Integrated new event manager with subsystem initializations.
- *
- * Revision 1.9 1997/12/30 16:36:54 curt
- * Merged in Durk's changes ...
- *
- * Revision 1.8 1997/12/19 23:35:00 curt
- * Lot's of tweaking with sky rendering and lighting.
- *
- * Revision 1.7 1997/12/17 23:12:16 curt
- * Fixed so moon and sun display lists aren't recreate periodically.
- *
- * Revision 1.6 1997/12/15 23:55:04 curt
- * Add xgl wrappers for debugging.
- * Generate terrain normals on the fly.
- *
- * Revision 1.5 1997/12/12 21:41:31 curt
- * More light/material property tweaking ... still a ways off.
- *
- * Revision 1.4 1997/12/10 22:37:53 curt
- * Prepended "fg" on the name of all global structures that didn't have it yet.
- * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
- *
- * Revision 1.3 1997/12/09 05:11:56 curt
- * Working on tweaking lighting.
- *
- * Revision 1.2 1997/11/25 19:25:39 curt
- * Changes to integrate Durk's moon/sun code updates + clean up.
- *
- * Revision 1.1 1997/10/25 03:16:11 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
-
-
-
-
-
+++ /dev/null
-/**************************************************************************
- * sun.hxx
- *
- * Written 1997 by Durk Talsma, started October, 1997. For the flight gear
- * project.
- *
- * 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.
- *
- * $Id$
- * (Log is kept at end of this file)
- **************************************************************************/
-
-
-#ifndef _SUN_HXX
-#define _SUN_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-extern fgSUNPOS solarPosition;
-
-
-void fgCalcSunPos (struct OrbElements sunParams);
-extern struct OrbElements pltOrbElements[9];
-
-
-/* Initialize the Sun */
-void fgSunInit( void );
-
-
-/* Draw the Sun */
-void fgSunRender( void );
-
-
-#endif /* _SUN_HXX */
-
-
-/* $Log$
-/* Revision 1.1 1998/04/22 13:21:37 curt
-/* C++ - ifing the code a bit.
-/*
- * Revision 1.6 1998/04/21 17:02:33 curt
- * Prepairing for C++ integration.
- *
- * Revision 1.5 1998/03/09 22:47:26 curt
- * Incorporated Durk's updates.
- *
- * Revision 1.4 1998/02/23 19:07:57 curt
- * Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
- * calculation code between sun display, and other FG sections that use this
- * for things like lighting.
- *
- * Revision 1.3 1998/01/22 02:59:29 curt
- * Changed #ifdef FILE_H to #ifdef _FILE_H
- *
- * Revision 1.2 1998/01/19 18:40:19 curt
- * Tons of little changes to clean up the code and to remove fatal errors
- * when building with the c++ compiler.
- *
- * Revision 1.1 1998/01/07 03:16:21 curt
- * Moved from .../Src/Scenery/ to .../Src/Astro/
- *
- * Revision 1.3 1997/12/11 04:43:56 curt
- * Fixed sun vector and lighting problems. I thing the moon is now lit
- * correctly.
- *
- * Revision 1.2 1997/11/25 19:25:39 curt
- * Changes to integrate Durk's moon/sun code updates + clean up.
- *
- * Revision 1.1 1997/10/25 03:16:12 curt
- * Initial revision of code contributed by Durk Talsma.
- *
- */
--- /dev/null
+/**************************************************************************
+ * uranus.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "uranus.hxx"
+
+/*************************************************************************
+ * Uranus::Uranus(fgTIME *t)
+ * Public constructor for class Uranus
+ * Argument: The current time.
+ * the hard coded orbital elements for Uranus are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Uranus::Uranus(fgTIME *t) :
+ CelestialBody(74.00050, 1.3978000E-5,
+ 0.7733, 1.900E-8,
+ 96.66120, 3.0565000E-5,
+ 19.181710, -1.55E-8,
+ 0.047318, 7.450E-9,
+ 142.5905, 0.01172580600, t)
+{
+}
+
+/*************************************************************************
+ * void Uranus::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Uranus, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Uranus specific equation
+ *************************************************************************/
+void Uranus::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -7.15 + 5*log10( r*R) + 0.001 * FV;
+}
--- /dev/null
+/**************************************************************************
+ * uranus.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _URANUS_HXX_
+#define _URANUS_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Uranus : public CelestialBody
+{
+public:
+ Uranus ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *sun);
+};
+
+#endif // _URANUS_HXX_
--- /dev/null
+/**************************************************************************
+ * venus.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#include "venus.hxx"
+
+/*************************************************************************
+ * Venus::Venus(fgTIME *t)
+ * Public constructor for class Venus
+ * Argument: The current time.
+ * the hard coded orbital elements for Venus are passed to
+ * CelestialBody::CelestialBody();
+ ************************************************************************/
+Venus::Venus(fgTIME *t) :
+ CelestialBody(76.67990, 2.4659000E-5,
+ 3.3946, 2.75E-8,
+ 54.89100, 1.3837400E-5,
+ 0.7233300, 0.000000,
+ 0.006773, -1.302E-9,
+ 48.00520, 1.60213022440, t)
+{
+}
+
+/*************************************************************************
+ * void Venus::updatePosition(fgTIME *t, Star *ourSun)
+ *
+ * calculates the current position of Venus, by calling the base class,
+ * CelestialBody::updatePosition(); The current magnitude is calculated using
+ * a Venus specific equation
+ *************************************************************************/
+void Venus::updatePosition(fgTIME *t, Star *ourSun)
+{
+ CelestialBody::updatePosition(t, ourSun);
+ magnitude = -4.34 + 5*log10( r*R ) + 0.013 * FV + 4.2E-07 * pow(FV,3);
+}
--- /dev/null
+/**************************************************************************
+ * venus.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.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+#ifndef _VENUS_HXX_
+#define _VENUS_HXX_
+
+#include <Time/fg_time.hxx>
+#include "celestialBody.hxx"
+#include "star.hxx"
+
+class Venus : public CelestialBody
+{
+public:
+ Venus ( fgTIME *t);
+ void updatePosition(fgTIME *t, Star *ourSun);
+};
+
+#endif // _VENUS_HXX_
projects / simgear.git / commitdiff