SO3Engine: SO3Engine/SO3SceneGraph/SO3Sun.cpp Source File

00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OpenSpace3D
00004 For the latest info, see http://www.openspace3d.com
00005 
00006 Copyright (c) 2010 I-maginer
00007 
00008 This program is free software; you can redistribute it and/or modify it under
00009 the terms of the GNU Lesser General Public License as published by the Free Software
00010 Foundation; either version 2 of the License, or (at your option) any later
00011 version.
00012 
00013 This program is distributed in the hope that it will be useful, but WITHOUT
00014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00016 
00017 You should have received a copy of the GNU Lesser General Public License along with
00018 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00019 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00020 http://www.gnu.org/copyleft/lesser.txt
00021 
00022 You may alternatively use this source under the terms of a specific version of
00023 the OpenSpace3D Unrestricted License provided you have obtained such a license from
00024 I-maginer.
00025 -----------------------------------------------------------------------------
00026 */
00027 
00035 #include "SO3Sun.h"
00036 #include "SO3Environment.h"
00037 
00038 namespace SO3
00039 {
00040 
00041 SSun::SSun(SEnvironment* parent, std::string sunName) : SSkyLight(parent, sunName)
00042 {
00043 }
00044 
00045 SSun::SSun() : SSkyLight(0, "")
00046 {
00047   // Forbiden (private)
00048 }
00049 
00050 SSun::~SSun()
00051 {
00052 }
00053 
00054 const Ogre::Vector3 SSun::ComputeDirectionImpl(double julianDay)
00055 {
00056   return GetSunDirection(julianDay);
00057 }
00058 
00059 const Ogre::Vector3 SSun::GetSunDirection(double jday)
00060 {
00061   Ogre::Degree azimuth;
00062   Ogre::Degree altitude;
00063   {
00064     ScopedHighPrecissionFloatSwitch precisionSwitch;
00065     SAstronomy::GetHorizontalSunPosition(jday, parentEnvironment->GetLongitude(), parentEnvironment->GetLatitude(), azimuth, altitude);         
00066   }
00067   Ogre::Vector3 res = MakeDirection(azimuth, altitude);
00068   return res;
00069 }
00070 
00071 
00072 }