From: curt Date: Tue, 25 Nov 1997 23:20:22 +0000 (+0000) Subject: Initial revision. X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=8feb45fa729529f575c68baa1cace3cb31524adb;p=simgear.git Initial revision. --- diff --git a/Scenery/astro.c b/Scenery/astro.c new file mode 100644 index 00000000..a9534696 --- /dev/null +++ b/Scenery/astro.c @@ -0,0 +1,125 @@ +/************************************************************************** + * astro.c + * + * Written by Durk Talsma. Started November 1997, for use with 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) + **************************************************************************/ + + +#include +#include +#include +#include + +#include + +#include "astro.h" +#include "moon.h" +#include "orbits.h" +#include "planets.h" +#include "stars.h" +#include "sun.h" + +#include "../constants.h" +#include "../general.h" + +#include "../Main/views.h" +#include "../Aircraft/aircraft.h" +#include "../Time/fg_time.h" + +static double prevUpdate = 0; + + +/* Initialize Astronomical Objects */ +void fgAstroInit() { + struct fgTIME *t; + t = &cur_time_params; + + /* Initialize the orbital elements of sun, moon and mayor planets */ + fgSolarSystemInit(*t); + + /* Intialize the moon's position */ + fgMoonInit(); + + /* Initialize the sun's position */ + fgSunInit(); + + /* Initialize the Stars subsystem */ + fgStarsInit(); +} + + +/* Render Astronomical Objects */ +void fgAstroRender() { + struct FLIGHT *f; + struct VIEW *v; + struct fgTIME *t; + double angle; + + f = ¤t_aircraft.flight; + t = &cur_time_params; + v = ¤t_view; + + /* a hack: Force sun and moon position to be updated on an hourly basis */ + if (((t->gst - prevUpdate) > 1) || (t->gst < prevUpdate)) { + prevUpdate = t->gst; + fgSunInit(); + fgMoonInit(); + } + + /* Disable fog effects */ + glDisable( GL_FOG ); + + /* reverse light direction so the moon is displayed properly */ + glLightfv( GL_LIGHT0, GL_POSITION, t->sun_vec_inv ); + + glPushMatrix(); + + /* Translate to view position */ + glTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z ); + + /* Rotate based on gst (side real time) */ + angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/ +#ifdef DEBUG + printf("Rotating astro objects by %.2f degrees\n",angle); +#endif + glRotatef( angle, 0.0, 0.0, -1.0 ); + + /* render the stars */ + fgStarsRender(); + + /* render the moon */ + fgMoonRender(); + + /* render the sun */ + fgSunRender(); + + glPopMatrix(); + + /* reenable fog effects */ + glEnable( GL_FOG ); +} + + +/* $Log$ +/* Revision 1.1 1997/11/25 23:20:22 curt +/* Initial revision. +/* + */ diff --git a/Scenery/astro.h b/Scenery/astro.h new file mode 100644 index 00000000..c273d1a8 --- /dev/null +++ b/Scenery/astro.h @@ -0,0 +1,55 @@ +/************************************************************************** + * astro.h + * + * Written by Durk Talsma. Started November 1997, for use with 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 _ASTRO_H_ +#define _ASTRO_H_ + +#include +#include "stars.h" + +extern struct CelestialCoord + moonPos; + +extern float xMoon, yMoon, zMoon, xSun, ySun, zSun; +extern GLint moon, sun; +extern GLint stars[FG_STAR_LEVELS]; +extern GLfloat fgClearColor[4]; + + +/* Initialize Astronomical Objects */ +void fgAstroInit(); + +/* Render Astronomical objects */ +void fgAstroRender(); + + +#endif /* _ASTRO_H_ */ + + +/* $Log$ +/* Revision 1.1 1997/11/25 23:20:23 curt +/* Initial revision. +/* + */