61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
/**************************************************************************
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* venus.cxx
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* Written by Durk Talsma. Originally started October 1997, for distribution
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* with the FlightGear project. Version 2 was written in August and
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* September 1998. This code is based upon algorithms and data kindly
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* provided by Mr. Paul Schlyter. (pausch@saaf.se).
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#ifdef __BORLANDC__
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# define exception c_exception
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#endif
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#include <math.h>
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#include "venus.hxx"
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/*************************************************************************
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* Venus::Venus(fgTIME *t)
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* Public constructor for class Venus
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* Argument: The current time.
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* the hard coded orbital elements for Venus are passed to
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* CelestialBody::CelestialBody();
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************************************************************************/
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Venus::Venus(fgTIME *t) :
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CelestialBody(76.67990, 2.4659000E-5,
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3.3946, 2.75E-8,
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54.89100, 1.3837400E-5,
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0.7233300, 0.000000,
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0.006773, -1.302E-9,
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48.00520, 1.60213022440, t)
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{
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}
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/*************************************************************************
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* void Venus::updatePosition(fgTIME *t, Star *ourSun)
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*
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* calculates the current position of Venus, by calling the base class,
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* CelestialBody::updatePosition(); The current magnitude is calculated using
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* a Venus specific equation
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*************************************************************************/
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void Venus::updatePosition(fgTIME *t, Star *ourSun)
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{
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CelestialBody::updatePosition(t, ourSun);
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magnitude = -4.34 + 5*log10( r*R ) + 0.013 * FV + 4.2E-07 * pow(FV,3);
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}
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