SO3Engine: SO3Engine/SO3SceneGraph/SO3SkyLight.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 "SO3SkyLight.h"
00036 #include "SO3Environment.h"
00037 #include "SO3Scene.h"
00038 
00039 namespace SO3
00040 {
00041 
00042 SSkyLight::SSkyLight(SEnvironment* parent, std::string skyLightName) : SData(skyLightName)
00043 {
00044   parentEnvironment = parent;
00045   ogreSceneManager = parent->GetScene()->GetOgreScenePointer();
00046   lastJulDay = 0;
00047 
00048   // No scene node needed to render the light.
00049   ogreSkyLight = ogreSceneManager->createLight(skyLightName +"/Light");
00050   ogreSkyLight->setType(Ogre::Light::LT_DIRECTIONAL);
00051   ogreSkyLight->setVisible(false);
00052 }
00053 
00054 SSkyLight::SSkyLight() : SData("")
00055 {
00056   // Forbiden (private)
00057 }
00058 
00059 SSkyLight::~SSkyLight()
00060 {
00061   if(ogreSkyLight)
00062   {
00063     ogreSceneManager->destroyLight(ogreSkyLight);
00064     ogreSkyLight = 0;
00065   }
00066 
00067   ogreSceneManager = 0;
00068   parentEnvironment = 0;
00069 }
00070 
00071 SEnvironment* SSkyLight::GetEnvironment()
00072 {
00073   return parentEnvironment;
00074 }
00075 
00076 void SSkyLight::Update()
00077 {
00078   // Update only when necessary
00079   double julDay = parentEnvironment->GetUniversalClock()->GetJulianDay();
00080   if((lastJulDay == 0)||(lastJulDay != julDay))
00081   {
00082     SetLightDirection(ComputeDirectionImpl(julDay));
00083     lastJulDay = julDay;
00084   }
00085 }
00086 
00087 const Ogre::Vector3 SSkyLight::GetLightDirection() const
00088 {
00089   return ogreSkyLight->getDirection();
00090 }
00091 
00092 void SSkyLight::SetLightDirection(const Ogre::Vector3& direction)
00093 {
00094   ogreSkyLight->setDirection(direction);
00095 }
00096 
00097 const Ogre::ColourValue SSkyLight::GetLightColour() const
00098 {
00099   return Ogre::ColourValue::Black;
00100 }
00101 
00102 void SSkyLight::SetLightColour(const Ogre::ColourValue& newColour)
00103 {
00104   // TODO
00105 }
00106 
00107 const Ogre::Vector3 SSkyLight::MakeDirection(Ogre::Degree azimuth, Ogre::Degree altitude)
00108 {
00109     Ogre::Vector3 res;
00110     res.z = Ogre::Math::Cos(azimuth) * Ogre::Math::Cos(altitude);   // North 
00111     res.x = -Ogre::Math::Sin(azimuth) * Ogre::Math::Cos(altitude);  // East
00112     res.y = -Ogre::Math::Sin(altitude);                             // Zenith
00113     return res;
00114 }
00115 
00116 }