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kstars

planetcatalog.cpp

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/***************************************************************************
                          planetcatalog.cpp  -  description
                             -------------------
    begin                : Mon Feb 18 2002
    copyright          : (C) 2002 by Mark Hollomon
    email                : mhh@mindspring.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include <qstring.h>

#include "planetcatalog.h"
#include "dms.h"
#include "kstarsdata.h"
#include "ksnumbers.h"
#include "ksplanetbase.h"
#include "ksplanet.h"
#include "kssun.h"
#include "kspluto.h"
#include "skypoint.h"
#include "skyobject.h"
#include "objectnamelist.h"

PlanetCatalog::PlanetCatalog(KStarsData *dat) : Earth(0), Sun(0), kd(dat) {
    planets.setAutoDelete(true);
}

PlanetCatalog::~PlanetCatalog() {
    //
    // do NOT delete Sun. It is also in the QList
    // and will be deleted automatically.
    //
    delete Earth;
}



bool PlanetCatalog::initialize() {
    KSPlanetBase *ksp;

    Earth = new KSPlanet( kd, I18N_NOOP( "Earth" ), "", 12756.28 /*diameter in km*/ );
    if (!Earth->loadData())
        return false;

    Sun = new KSSun( kd, "sun.png", 1392000. /*diameter in km*/ );
    if (Sun->loadData()) {
        planets.append(Sun);
    }

    ksp = new KSPluto( kd, "pluto.png", 2320. /*diameter in km*/ );
    planets.append(ksp);

    ksp = new KSPlanet( kd, I18N_NOOP( "Mercury" ), "mercury.png", 4879.4 /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Venus" ), "venus.png", 12103.6 /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Mars" ), "mars.png", 6792.4 /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Jupiter" ), "jupiter.png", 142984. /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Saturn" ), "saturn.png", 120536. /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Uranus" ), "uranus.png", 51118. /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    ksp = new KSPlanet( kd, I18N_NOOP( "Neptune" ), "neptune.png", 49572. /*diameter in km*/ );
    if (ksp->loadData()) {
        planets.append(ksp);
    }

    return true;
}

void PlanetCatalog::addObject( ObjectNameList &ObjNames ) const {
    QPtrListIterator<KSPlanetBase> it(planets);

    for (KSPlanetBase *ksp = it.toFirst(); ksp != 0; ksp = ++it) {
        ObjNames.append( ksp );
    }
}

void PlanetCatalog::findPosition( const KSNumbers *num, const dms *lat, const dms *LST ) {
    Earth->findPosition(num);
    for (KSPlanetBase * ksp = planets.first(); ksp != 0; ksp = planets.next()) {
        ksp->findPosition(num, lat, LST, Earth);
    }
}

void PlanetCatalog::EquatorialToHorizontal( dms *LST, const dms *lat ) {
    for (KSPlanetBase * ksp = planets.first(); ksp != 0; ksp = planets.next()) {
        ksp->EquatorialToHorizontal( LST, lat);
        if ( ksp->hasTrail() ) ksp->updateTrail( LST, lat );
    }
}

bool PlanetCatalog::isPlanet(SkyObject *so) const {
    if (so == Earth)
        return true;

    QPtrListIterator<KSPlanetBase> it(planets);

    for (KSPlanetBase *ksp = it.toFirst(); ksp != 0; ksp = ++it) {
        if (so == ksp)
            return true;
    }

    return false;
}

KSPlanetBase *PlanetCatalog::findByName( const QString n) const {
    if (n == "Earth")
        return Earth;

    QPtrListIterator<KSPlanetBase> it(planets);

    for (KSPlanetBase *ksp = it.toFirst(); ksp != 0; ksp = ++it) {
        if (ksp->name() == n)
            return ksp;
    }

    kdDebug() << k_funcinfo << "could not find planet named " << n << endl;

    return 0;
}

static double dist_squared(const SkyPoint *a, const SkyPoint *b) {
    double dRA = a->ra()->Hours() - b->ra()->Hours();
    double dDec = a->dec()->Degrees() - b->dec()->Degrees();
    double f = 15.0*cos( a->dec()->radians() );

    return f*f*dRA*dRA + dDec*dDec;
}

SkyObject *PlanetCatalog::findClosest(const SkyPoint *p, double &r) const {
    QPtrListIterator<KSPlanetBase> it(planets);
    SkyObject *found = 0;
    double trialr = 0.0;
    double rmin = 100000.0;

    for (KSPlanetBase *ksp = it.toFirst(); ksp != 0; ksp = ++it) {
        trialr = dist_squared(ksp, p);
        if (trialr < rmin) {
            rmin = trialr;
            found = ksp;
        }
    }

    r = rmin;
    return found;

}

#include "planetcatalog.moc"

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