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
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

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
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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*/
#ifndef __ShadowCameraSetupPSSM_H__
#define __ShadowCameraSetupPSSM_H__

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

namespace Ogre
{

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

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

        mutable size_t mCurrentIteration;

    public:
        PSSMShadowCameraSetup();
        ~PSSMShadowCameraSetup();

        void calculateSplitPoints(uint 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; }
        uint 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;

    };
}

#include "OgreHeaderSuffix.h"

#endif