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flightgear/src/Environment/ephemeris.cxx

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// ephemeris.cxx -- wrap SGEphemeris code in a subsystem
//
// Written by James Turner, started June 2010.
//
// Copyright (C) 2010 Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#include <Environment/ephemeris.hxx>
#include <simgear/timing/sg_time.hxx>
#include <simgear/ephemeris/ephemeris.hxx>
#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
static void tieStar(const char* prop, Star* s, double (Star::*getter)() const)
{
fgGetNode(prop, true)->tie(SGRawValueMethods<Star, double>(*s, getter, NULL));
}
Ephemeris::Ephemeris() :
_impl(NULL),
_latProp(NULL)
{
}
Ephemeris::~Ephemeris()
{
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}
SGEphemeris* Ephemeris::data()
{
return _impl;
}
void Ephemeris::init()
{
SGPath ephem_data_path(globals->get_fg_root());
ephem_data_path.append("Astro");
_impl = new SGEphemeris(ephem_data_path.local8BitStr());
tieStar("/ephemeris/sun/xs", _impl->get_sun(), &Star::getxs);
tieStar("/ephemeris/sun/ys", _impl->get_sun(), &Star::getys);
tieStar("/ephemeris/sun/ze", _impl->get_sun(), &Star::getze);
tieStar("/ephemeris/sun/ye", _impl->get_sun(), &Star::getye);
tieStar("/ephemeris/sun/lat-deg", _impl->get_sun(), &Star::getLat);
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_latProp = fgGetNode("/position/latitude-deg", true);
update(0.0);
}
void Ephemeris::shutdown()
{
delete _impl;
_impl = NULL;
}
void Ephemeris::postinit()
{
}
void Ephemeris::bind()
{
}
void Ephemeris::unbind()
{
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_latProp = 0;
}
void Ephemeris::update(double)
{
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SGTime* st = globals->get_time_params();
_impl->update(st->getMjd(), st->getLst(), _latProp->getDoubleValue());
}