OgreShadowCameraSetupPSSM.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2013 Torus Knot Software Ltd
Copyright (c) 2006 Matthias Fink, netAllied GmbH <matthias.fink@web.de>                             

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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*/
#ifndef __ShadowCameraSetupPSSM_H__
#define __ShadowCameraSetupPSSM_H__

#include "OgrePrerequisites.h"
#include "OgreShadowCameraSetupLiSPSM.h"

namespace Ogre
{

    class _OgreExport PSSMShadowCameraSetup : public Ogre::LiSPSMShadowCameraSetup
    {
    public:
        typedef vector<Real>::type SplitPointList;
        typedef vector<Real>::type OptimalAdjustFactorList;

    protected:
        size_t mSplitCount;
        SplitPointList mSplitPoints;
        OptimalAdjustFactorList mOptimalAdjustFactors;
        Real mSplitPadding;

        mutable size_t mCurrentIteration;

    public:
        PSSMShadowCameraSetup();
        ~PSSMShadowCameraSetup();

        void calculateSplitPoints(size_t splitCount, Real nearDist, Real farDist, Real lambda = 0.95);

        void setSplitPoints(const SplitPointList& newSplitPoints);

        void setOptimalAdjustFactor(size_t splitIndex, Real factor);

        void setSplitPadding(Real pad) { mSplitPadding = pad; }

        Real getSplitPadding() const { return mSplitPadding; }
        size_t getSplitCount() const { return mSplitCount; }

        virtual void getShadowCamera(const Ogre::SceneManager *sm, const Ogre::Camera *cam,
            const Ogre::Viewport *vp, const Ogre::Light *light, Ogre::Camera *texCam, size_t iteration) const;

        inline const SplitPointList& getSplitPoints() const
        { return mSplitPoints; }

        inline Real getOptimalAdjustFactor(size_t splitIndex) const
        { return mOptimalAdjustFactors[splitIndex]; }

        Real getOptimalAdjustFactor() const;

    };
}
#endif