// magvarmanager.cxx -- Wraps the SimGear SGMagVar in a subsystem // // Copyright (C) 2012 James Turner - zakalawe@mac.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. // // 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. // #ifdef HAVE_CONFIG_H # include <config.h> #endif #include "magvarmanager.hxx" #include <simgear/sg_inlines.h> #include <simgear/magvar/magvar.hxx> #include <simgear/timing/sg_time.hxx> #include <simgear/math/SGMath.hxx> #include <Main/globals.hxx> #include <Main/fg_props.hxx> FGMagVarManager::FGMagVarManager() : _magVar(new SGMagVar) { } FGMagVarManager::~FGMagVarManager() { } void FGMagVarManager::init() { update(0.0); // force an immediate update } void FGMagVarManager::bind() { _magVarNode = fgGetNode("/environment/magnetic-variation-deg", true); _magDipNode = fgGetNode("/environment/magnetic-dip-deg", true); } void FGMagVarManager::unbind() { _magVarNode = SGPropertyNode_ptr(); _magDipNode = SGPropertyNode_ptr(); } void FGMagVarManager::update(double dt) { SG_UNUSED(dt); // update magvar model _magVar->update( globals->get_aircraft_position(), globals->get_time_params()->getJD() ); _magVarNode->setDoubleValue(_magVar->get_magvar() * SG_RADIANS_TO_DEGREES); _magDipNode->setDoubleValue(_magVar->get_magdip() * SG_RADIANS_TO_DEGREES); } // Register the subsystem. SGSubsystemMgr::Registrant<FGMagVarManager> registrantFGMagVarManager;