SO3Sun.cpp

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/*
-----------------------------------------------------------------------------
This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com
 
Copyright (c) 2012 I-maginer
 
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser 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 Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt
 
-----------------------------------------------------------------------------
*/
 
#include "SO3SceneGraph/SO3Sun.h"
#include "SO3SceneGraph/SO3Environment.h"
 
namespace SO3
{
 
SSun::SSun(SEnvironment* parent, const std::string& sunName) : SSkyLight(parent, sunName, Ogre::ColourValue(0.8, 0.8, 0.8))
{
  SetCastShadowEnable(true);
}
 
SSun::SSun() : SSkyLight(0, "", Ogre::ColourValue::Black)
{
  // Forbiden (private)
}
 
SSun::~SSun()
{
}
 
const Ogre::Vector3 SSun::ComputeDirectionImpl(const double& julianDay)
{
  return GetSunDirection(julianDay);
}
 
const Ogre::Vector3 SSun::GetSunDirection(const double& jday)
{
  Ogre::Degree azimuth;
  Ogre::Degree altitude;
  {
    ScopedHighPrecissionFloatSwitch precisionSwitch;
    SAstronomy::GetHorizontalSunPosition(jday, parentEnvironment->GetLongitude(), parentEnvironment->GetLatitude(), azimuth, altitude);         
  }
  Ogre::Vector3 res = MakeDirection(azimuth, altitude);
  return res;
}
 
 
}