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) 2000-2012 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
all copies or substantial portions of the Software.

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