71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// magvarmanager.cxx -- Wraps the SimGear SGMagVar in a subsystem
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//
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// Copyright (C) 2012 James Turner - zakalawe@mac.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "magvarmanager.hxx"
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#include <simgear/sg_inlines.h>
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#include <simgear/magvar/magvar.hxx>
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#include <simgear/timing/sg_time.hxx>
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#include <simgear/math/SGMath.hxx>
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#include <Main/globals.hxx>
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#include <Main/fg_props.hxx>
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FGMagVarManager::FGMagVarManager() :
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_magVar(new SGMagVar)
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{
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}
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FGMagVarManager::~FGMagVarManager()
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{
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}
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void FGMagVarManager::init()
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{
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update(0.0); // force an immediate update
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}
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void FGMagVarManager::bind()
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{
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_magVarNode = fgGetNode("/environment/magnetic-variation-deg", true);
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_magDipNode = fgGetNode("/environment/magnetic-dip-deg", true);
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}
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void FGMagVarManager::unbind()
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{
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_magVarNode = SGPropertyNode_ptr();
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_magDipNode = SGPropertyNode_ptr();
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}
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void FGMagVarManager::update(double dt)
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{
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SG_UNUSED(dt);
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// update magvar model
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_magVar->update( globals->get_aircraft_position(),
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globals->get_time_params()->getJD() );
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_magVarNode->setDoubleValue(_magVar->get_magvar() * SG_RADIANS_TO_DEGREES);
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_magDipNode->setDoubleValue(_magVar->get_magdip() * SG_RADIANS_TO_DEGREES);
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}
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