+++ /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();
-}
-
-
-
-
-
-
-
projects / simgear.git / commitdiff