OgreShadowCameraSetupLiSPSM.h

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

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#ifndef __ShadowCameraSetupLiSPSM_H__
#define __ShadowCameraSetupLiSPSM_H__

#include "OgrePrerequisites.h"
#include "OgreShadowCameraSetupFocused.h"


namespace Ogre 
{

    class _OgreExport LiSPSMShadowCameraSetup : public FocusedShadowCameraSetup
    {
    protected:
        Real mOptAdjustFactor;
        bool mUseSimpleNOpt;
        mutable Real mOptAdjustFactorTweak;
        Real mCosCamLightDirThreshold;

        Matrix4 calculateLiSPSM(const Matrix4& lightSpace, const PointListBody& bodyB, 
            const PointListBody& bodyLVS, const SceneManager& sm, 
            const Camera& cam, const Light& light) const;

        Real calculateNOpt(const Matrix4& lightSpace, const AxisAlignedBox& bodyBABB_ls, 
            const PointListBody& bodyLVS, const Camera& cam) const;

        Real calculateNOptSimple(const PointListBody& bodyLVS, 
            const Camera& cam) const;

        Vector3 calculateZ0_ls(const Matrix4& lightSpace, const Vector3& e, Real bodyB_zMax_ls, 
            const Camera& cam) const;

        Matrix4 buildFrustumProjection(Real left, Real right, Real bottom, 
            Real top, Real near, Real far) const;

    public:
        LiSPSMShadowCameraSetup(void);

        virtual ~LiSPSMShadowCameraSetup(void);

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

        virtual void setOptimalAdjustFactor(Real n) { mOptAdjustFactor = n; }
        virtual Real getOptimalAdjustFactor() const { return mOptAdjustFactor; }
        virtual void setUseSimpleOptimalAdjust(bool s) { mUseSimpleNOpt = s; }
        virtual bool getUseSimpleOptimalAdjust() const { return mUseSimpleNOpt; }

        virtual void setCameraLightDirectionThreshold(Degree angle);

        virtual Degree getCameraLightDirectionThreshold() const;


    };
}

#endif