main/include/SkyColourModel.h

/*
This file is part of Caelum.
See http://www.ogre3d.org/wiki/index.php/Caelum 

Copyright (c) 2006-2007 Caelum team. See Contributors.txt for details.

Caelum 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 3 of the License, or
(at your option) any later version.

Caelum 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 Caelum. If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef SKYCOLOURMODEL_H
#define SKYCOLOURMODEL_H

#include "CaelumPrerequisites.h"

namespace caelum {

class CAELUM_EXPORT SkyColourModel {
// Attributes -----------------------------------------------------------------
    private:
        Ogre::Image *mSkyGradientsImage;

        Ogre::Image *mSunColoursImage;

        float mFogDensityMultiplier;

// Methods --------------------------------------------------------------------
    public:
        SkyColourModel (
                const Ogre::String &skyGradients = "EarthClearSky2.png",
                const Ogre::String &sunColours = "SunGradient.png"
                );

        virtual ~SkyColourModel ();

        Ogre::ColourValue getFogColour (float time, const Ogre::Vector3 &sunDir);

        float getFogDensity (float time, const Ogre::Vector3 &sunDir);

        Ogre::ColourValue getSunSphereColour (float time, const Ogre::Vector3 &sunDir);

        Ogre::ColourValue getSunLightColour (float time, const Ogre::Vector3 &sunDir);

        Ogre::ColourValue getMoonBodyColour (const Ogre::Vector3 &moonDir);

        Ogre::ColourValue getMoonLightColour (const Ogre::Vector3 &moonDir);

        void setSkyGradientsImage (const Ogre::String &filename);

        void setSunColoursImage (const Ogre::String &filename);
};

} // namespace caelum

#endif //SKYCOLOURMODEL_H

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