GU_PrimVolumeCache.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        GU_PrimVolumeCache.h ( GU Library, C++)
 *
 * COMMENTS:
 */

#ifndef __GU_PrimVolumeCache__
#define __GU_PrimVolumeCache__

#include "GU_API.h"

#include <string.h>
#include <UT/UT_Vector3.h>
#include <UT/UT_Vector4.h>
#include <UT/UT_Array.h>
#include <UT/UT_VoxelArray.h>
#include <UT/UT_ThreadedAlgorithm.h>

#include <GEO/GEO_PrimVolume.h>

#include "GU_Detail.h"
#include "GU_DetailHandle.h"
#include "GU_DisplayCache.h"

class UT_Ramp;
class GEO_PrimVolume;
class GEO_PrimVDB;

// TODO: When deleting GU_DisplayCache, DON'T delete
//       GU_PrimVolumeCache.  Move it to GT_PrimVolumeCache,
//       along with any functions needed from the superclass.
//       It's still used by GT_PrimVolume!!!
SYS_DEPRECATED_PUSH_DISABLE()

class GU_API GU_PrimVolumeCacheLight
{
public:
    GU_PrimVolumeCacheLight()
        : myOrg(0,0,0), myDir(0,0,0), myCd(0,0,0), myShadow(0.0),
          myHasAttenuation(false), myIsAmbient(false), myIsInfinite(false),
          myIsHeadlight(false), myIsEnvironment(false), myIsCone(false)
    {
        for(int i = 0; i < 8; i++)
            myAtten[i] = 1;
    }
    
    bool                 operator==(const GU_PrimVolumeCacheLight &l) const
                        {
                            // ignore headlight to prevent updates on tumble
                            if (myIsHeadlight &&
                                myIsHeadlight == l.myIsHeadlight)
                                return true;
                            
                // Ensure attenuation parameters are the same...
                if(myHasAttenuation != l.myHasAttenuation || (myHasAttenuation &&
                        (myAttenuationCoeffs[0] != l.myAttenuationCoeffs[0]
                      || myAttenuationCoeffs[1] != l.myAttenuationCoeffs[1]
                      || myAttenuationCoeffs[2] != l.myAttenuationCoeffs[2])))
                    return false;
                // Ensure cone light parameters are the same...
                if(myIsCone != l.myIsCone || (myIsCone &&
                        (myConeAngle != l.myConeAngle
                      || myConeDelta != l.myConeDelta
                      || myConeRolloff != l.myConeRolloff)))
                    return false;

                            return (myOrg == l.myOrg) &&
                                   (myDir == l.myDir) &&
                                   (myCd == l.myCd) &&
                                   (myIsAmbient == l.myIsAmbient) &&
                                   (myIsInfinite == l.myIsInfinite) &&
                                   (myShadow == l.myShadow) &&
                                   (myIsEnvironment == l.myIsEnvironment);
                        }
    
    void                 setOrg(const UT_Vector3 &org) { myOrg = org; }
    void                 setDir(const UT_Vector3 &dir) { myDir = dir; }
    void                 setCd(const UT_Vector3 &cd) { myCd = cd; }
    void                 setShadowIntensity(float shadow) { myShadow = shadow; }
    void                 setIsAmbient(bool isamb) { myIsAmbient = isamb; }
    void                 setIsInfinite(bool isinf) { myIsInfinite = isinf; }
    void                 setIsHeadlight(bool hl) { myIsHeadlight = hl; }
    void                 setIsEnvironment(bool env) { myIsEnvironment = env; }
    void         setIsCone(bool cone) { myIsCone = cone; }
    void         setConeAngle(float angle) { myConeAngle = angle; }
    void         setConeDelta(float delta) { myConeDelta = delta; }
    void         setConeRolloff(float rolloff) { myConeRolloff = rolloff; }
    
    const UT_Vector3    &getOrg() const { return myOrg; }
    const UT_Vector3    &getDir() const { return myDir; }
    const UT_Vector3    &getCd() const { return myCd; }
    float                getShadow() const { return myShadow; }
    float        getConeAngle() const { return myConeAngle; }
    float        getConeDelta() const { return myConeDelta; }
    float        getConeRolloff() const { return myConeRolloff; }

    bool                 isAmbient() const { return myIsAmbient; }
    bool                 isInfinite() const { return myIsInfinite; }
    bool                 isHeadlight() const { return myIsHeadlight; }
    bool                 isEnvironment() const { return myIsEnvironment; }
    bool         isCone() const { return myIsCone; }

    float                getDistance(const UT_Vector3 &pos) const;
    // Inv Brightness attenuation for the 8 corners: x, then y, then z; - then +
    // interpolate, then invert. 
    void                 setCornerAttenuation(float a[8])
                         {
                             myHasAttenuation = true;
                             for(int i=0; i<8; i++)
                                 myAtten[i] = a[i];
                         }
    bool                 hasAttenuation() const { return myHasAttenuation; }
    float                getAttenuation(const UT_Vector3F &uvw) const;
    const float* getCornerAttenuation() const { return myAtten; }

    float*       getAttenuationCoeffArray() { return myAttenuationCoeffs; }
    const float* getConstAttenuationCoeffArray() const { return myAttenuationCoeffs; }

protected:
    UT_Vector3          myOrg, myDir;
    UT_Vector3          myCd;
    float               myShadow;
    bool                myHasAttenuation;
    float               myAtten[8];
    float       myAttenuationCoeffs[3];
    bool                myIsAmbient, myIsInfinite, myIsHeadlight;
    bool                myIsEnvironment;
    bool        myIsCone;
    float       myConeAngle, myConeDelta, myConeRolloff;
};


class GU_PrimVolumeCacheParms;
class GU_PrimVolume;

class GU_API GU_PrimVolumeTexture
{
public: 
    SYS_DEPRECATED_HDK(13.0)
                 GU_PrimVolumeTexture() {}
    SYS_DEPRECATED_HDK(13.0)
    virtual     ~GU_PrimVolumeTexture() {}

    SYS_DEPRECATED_HDK(13.0)
    virtual void         refresh(const UT_VoxelArrayV4 *voxels) = 0;
    SYS_DEPRECATED_HDK(13.0)
    virtual int64        getMemoryUsage(bool inclusive) const = 0;
};

class GU_API GU_PrimVolumeCacheRamp
{
public:
    GU_PrimVolumeCacheRamp(UT_Ramp *ramp, bool periodic);
    ~GU_PrimVolumeCacheRamp();

    void                eval(float &rval, float val) const;     
    void                eval(UT_Vector4 &rval, float val) const;        

protected:
    UT_Ramp             *myRamp;
    bool                 myPeriodic;
};

class GU_API GU_PrimVolumeCacheSampler
{
public:
    GU_PrimVolumeCacheSampler(const GEO_Detail *gdp, const GEO_Primitive *vol);
    ~GU_PrimVolumeCacheSampler();

    GU_PrimVolumeCacheRamp *buildRampFromAttribute(
                                    const GEO_Detail *gdp, 
                                    const char *attribname) const;
    int                  findCollationIndex(const GEO_Detail *gdp,
                                            const GEO_Primitive *vol) const;
    const GEO_Primitive *selectVolumeFromAttribute(
                                    const GEO_Detail *gdp, 
                                    const char *attribname,
                                    int collateidx) const;
    void                 selectVolumesFromAttribute(
                                    const GEO_Primitive *vol[3], 
                                    const GEO_Detail *gdp, 
                                    const char *attribname,
                                    int collateidx) const;
    void                 getRangeFromAttribute(
                                    const GEO_Detail *gdp, 
                                    const char *attribname, 
                                    float &rmin, float &rscale) const;
    float                getFloatFromAttribute(
                                    const GEO_Detail *gdp, 
                                    const char *attribname, 
                                    float def) const;

    float       getDensity(int x, int y, int z) const;
    UT_Vector4  getDiffuse(int x, int y, int z) const;

    void        getDensityProbe(UT_VoxelProbeF &probe) const;
    void        getEmitProbe(UT_VoxelProbeF &probe) const;
    void        getEmitCdProbe(UT_VoxelProbeV4 &probe) const;
    const UT_VoxelArrayF *getDensityArray() const;

    const GEO_Primitive *densityField() const { return myDensityField; }
    void                 setDensityField(const GEO_Primitive *densityfield);

    void    hardenFields(const UT_VoxelArray<UT_Vector4> &refvol, 
                         const GEO_PrimVolumeXform &volxform,
                         bool isheightfield);

    UT_VoxelArrayReadHandleF    hardenScalar(const UT_VoxelArrayV4 &refvol, 
                            const GEO_PrimVolumeXform &volxform,
                            const GEO_Primitive *field,
                            GU_PrimVolumeCacheRamp *ramp,
                            float rmin, float rinvscale);
    UT_VoxelArrayReadHandleV4   hardenVector(const UT_VoxelArrayV4 &refvol, 
                            const GEO_PrimVolumeXform &volxform,
                            const GEO_Primitive *field,
                            GU_PrimVolumeCacheRamp *ramp,
                            float rmin, float rinvscale);
    UT_VoxelArrayReadHandleV4 hardenVectorMulti(const UT_VoxelArrayV4 &refvol, 
                            const GEO_PrimVolumeXform &volxform,
                            const GEO_Primitive *field[3],
                            GU_PrimVolumeCacheRamp *ramp,
                            float rmin, float rinvscale);
    UT_VoxelArrayReadHandleV4   hardenVDBVector(const UT_VoxelArrayV4 &refvol, 
                            const GEO_PrimVolumeXform &volxform,
                            const GEO_Primitive *field,
                            GU_PrimVolumeCacheRamp *ramp,
                            float rmin, float rinvscale);

    THREADED_METHOD7_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenAligned,
                            UT_VoxelArrayF *, dst,
                            const UT_VoxelArrayF *, src,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenAlignedPartial(UT_VoxelArrayF *dst,
                                const UT_VoxelArrayF *src,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD7_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenUnaligned,
                            UT_VoxelArrayF *, dst,
                            const UT_VoxelArrayF *, src,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenUnalignedPartial(UT_VoxelArrayF *dst,
                                const UT_VoxelArrayF *src,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD7_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorAligned,
                            UT_VoxelArrayV4 *, dst,
                            const UT_VoxelArrayF *, src,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorAlignedPartial(UT_VoxelArrayV4 *dst,
                                const UT_VoxelArrayF *src,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD7_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorUnaligned,
                            UT_VoxelArrayV4 *, dst,
                            const UT_VoxelArrayF *, src,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorUnalignedPartial(UT_VoxelArrayV4 *dst,
                                const UT_VoxelArrayF *src,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD8_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorAxisAligned,
                            UT_VoxelArrayV4 *, dst,
                            const UT_VoxelArrayF *, src,
                            int, axis,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorAxisAlignedPartial(UT_VoxelArrayV4 *dst,
                                const UT_VoxelArrayF *src,
                                int axis,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD8_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorAxisUnaligned,
                            UT_VoxelArrayV4 *, dst,
                            const UT_VoxelArrayF *, src,
                            int, axis,
                            const GEO_PrimVolumeXform &, dst_xform,
                            const GEO_PrimVolumeXform &, src_xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorAxisUnalignedPartial(UT_VoxelArrayV4 *dst,
                                const UT_VoxelArrayF *src,
                                int axis,
                                const GEO_PrimVolumeXform &dst_xform,
                                const GEO_PrimVolumeXform &src_xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;

    THREADED_METHOD6_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVDB,
                            UT_VoxelArrayF *, dst,
                            const GEO_PrimVDB *, src,
                            const GEO_PrimVolumeXform &, xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVDBPartial(UT_VoxelArrayF *dst,
                                const GEO_PrimVDB *src,
                                const GEO_PrimVolumeXform &xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD6_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorVDB,
                            UT_VoxelArrayV4 *, dst,
                            const GEO_PrimVDB *, src,
                            const GEO_PrimVolumeXform &, xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorVDBPartial(UT_VoxelArrayV4 *dst,
                                const GEO_PrimVDB *src,
                                const GEO_PrimVolumeXform &xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD7_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorAxisVDB,
                            UT_VoxelArrayV4 *, dst,
                            const GEO_PrimVDB *, src,
                            int, axis,
                            const GEO_PrimVolumeXform &, xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorAxisVDBPartial(UT_VoxelArrayV4 *dst,
                                const GEO_PrimVDB *src,
                                int axis,
                                const GEO_PrimVolumeXform &xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;
    THREADED_METHOD6_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            doHardenVectorVectorVDB,
                            UT_VoxelArrayV4 *, dst,
                            const GEO_PrimVDB *, src,
                            const GEO_PrimVolumeXform &, xform,
                            GU_PrimVolumeCacheRamp *, ramp,
                            float, rmin,
                            float, rinvscale)
    void        doHardenVectorVectorVDBPartial(UT_VoxelArrayV4 *dst,
                                const GEO_PrimVDB *src,
                                const GEO_PrimVolumeXform &xform,
                                GU_PrimVolumeCacheRamp *ramp,
                                float rmin, float rinvscale,
                                const UT_JobInfo &info) const;

    THREADED_METHOD2_CONST(GU_PrimVolumeCacheSampler,
                            dst->numTiles() > 1,
                            applyAmbientLight,
                            UT_VoxelArrayV4 *, dst,
                            const UT_Vector4, cd)
    void        applyAmbientLightPartial(UT_VoxelArrayV4 *dst,
                                        const UT_Vector4 &cd,
                                        const UT_JobInfo &info) const;

    bool        hasEmission() const;
    float       getEmissionScale() const { return myEmissionScale; }
    float       getShadowScale() const { return myShadowScale; }

protected:
    float                        myDensityMin, myDensityInvRange;
    const GEO_Primitive         *myDensityField;
    GU_PrimVolumeCacheRamp      *myDensityRamp;
    float                        myShadowScale;


    float                        myDiffuseMin, myDiffuseInvRange;
    const GEO_Primitive         *myDiffuseField[3];
    GU_PrimVolumeCacheRamp      *myDiffuseRamp;

    float                        myEmissionScale;
    float                        myEmissionMin, myEmissionInvRange;
    const GEO_Primitive         *myEmissionField;
    GU_PrimVolumeCacheRamp      *myEmissionRamp;


    float                        myEmissionCdMin, myEmissionCdInvRange;
    const GEO_Primitive         *myEmissionCdField[3];
    GU_PrimVolumeCacheRamp      *myEmissionCdRamp;

    UT_VoxelArrayReadHandleF     myDensityHandle;
    UT_VoxelArrayReadHandleV4    myDiffuseHandle;
    UT_VoxelArrayReadHandleF     myEmissionHandle;
    UT_VoxelArrayReadHandleV4    myEmissionCdHandle;
};

class GU_API GU_PrimVolumeCache : public GU_DisplayCache
{
public:
                 GU_PrimVolumeCache(void);
    virtual     ~GU_PrimVolumeCache(void);

    // Build the cache.
    int          refresh(const GEO_Primitive *parent_prim,
                         const GU_PrimVolumeCacheParms &parms);

    // Get the cached data.
    UT_VoxelArrayV4             *getShadedVoxels(bool *reduced=nullptr) const
                                {
                                    if(reduced)
                                        *reduced = myVolumeReduced;
                                    return myVoxels;
                                }
    SYS_DEPRECATED_HDK(13.0)
    GU_PrimVolumeTexture        *getTexture() const      { return myTexture; }
    SYS_DEPRECATED_HDK(13.0)
    void                         setTexture(GU_PrimVolumeTexture *tex)
                                 { myTexture = tex; }

    GU_ConstDetailHandle         getIsoSurface() const  { return myIsoSurf; }

    UT_Vector3                   getIsoCd() const { return myIsoCd; }

    /// The cached resolution
    UT_Vector3I                  getRes() const { return myCacheRes; }

    GEO_PrimVolumeXform          getSpaceTransform() const
                                    { return myVolumeXform; }

    int64 getMemoryUsage(bool inclusive) const
    {
        int64 mem = inclusive ? sizeof(*this) : 0;
        if (myVoxels)
            mem += myVoxels->getMemoryUsage(true);
        mem += myLightList.getMemoryUsage(true);
        if (myTexture)
            mem += myTexture->getMemoryUsage(true);
        mem += myIsoSurf.getMemoryUsage(false);
        return mem;
    }

protected:
    void         lightVoxelsFromLight(const GU_PrimVolumeCacheSampler &sampler,
                                    const GU_PrimVolumeCacheLight &light,
                                    const UT_Vector3 &cd,
                                    float shadowdensity);

    void         rainbowVoxels(const GU_PrimVolumeCacheSampler &sampler);

    THREADED_METHOD3(GU_PrimVolumeCache, myVoxels->numTiles() > 1,
                    computeAlphaVoxels,
                    const GU_PrimVolumeCacheSampler &, sampler,
                    float, lightdensity,
                    bool, premultiply)
    void         computeAlphaVoxelsPartial(
                                const GU_PrimVolumeCacheSampler &sampler,
                                float lightdensity,
                                bool premultiply,
                                const UT_JobInfo &info);

    /// Maximum per-axis resolution to do the self shadowing calculations
    /// at.
    int                  getMaxRes(const GEO_Primitive *volume,
                                   const GU_PrimVolumeCacheParms &parms,
                                   int axis) const;

    /// Used to convert to and from our *cached* indices, not the
    /// actual primitive indices that may be a different resolution
    bool                 indexToPos(int x, int y, int z, UT_Vector3 &pos) const;
    bool                 posToIndex(UT_Vector3 pos, int &x, int &y, int &z) const;      

    UT_VoxelArrayV4             *myVoxels;
    UT_Array<GU_PrimVolumeCacheLight> myLightList;
    SYS_DEPRECATED_HDK(13.0)
    GU_PrimVolumeTexture        *myTexture;
    GU_DetailHandle              myIsoSurf;
    float                        myOldLOD;
    UT_Vector3                   myIsoCd;
    
    UT_Vector3I                  myCacheRes;
    GEO_PrimVolumeXform          myVolumeXform;
    bool                         myVolumeReduced;
    
    // Ignore these
    UT_Matrix4                   myCacheXform;
    UT_Matrix4                   myCacheIXform;
    
    const UT_VoxelArrayV4               *myCacheVolume;
};

class GU_API GU_PrimVolumeCacheParms : public GU_CacheParms
{
public:
                 GU_PrimVolumeCacheParms(void)
                     : myMaxResW(0), myMaxResH(0), myMaxResD(0)
                     , myMax2DRes(0)
                     , myIsoPoints(false)
                     , myPreMultiply(true)
                     , myCachedFlag(true)
                 {}
    virtual     ~GU_PrimVolumeCacheParms(void) {}

    void        setLights(UT_Array<GU_PrimVolumeCacheLight> &lightlist)
                { myLightList = lightlist; }
    const UT_Array<GU_PrimVolumeCacheLight> &getLights() const
                { return myLightList; }

    void        setMaxResolution(int w, int h, int d)
                { myMaxResW = w; myMaxResH = h; myMaxResD = d; }
    void        getMaxResolution(int &w, int &h, int &d) const
                { w = myMaxResW; h = myMaxResH; d = myMaxResD; }

    void        setMax2DRes(int s)
                { myMax2DRes = s; }
    int         getMax2DRes() const
                { return myMax2DRes; }

    void        setIsoPoints(bool iso_pts)  { myIsoPoints = iso_pts; }
    bool        isIsoPoints() const         { return myIsoPoints; }

    void        setPreMultiply(bool premultiply) { myPreMultiply = premultiply; }
    bool        getPreMultiply() const { return myPreMultiply; }

    void        setCached(bool b) const { myCachedFlag = b; }
    bool        isCached() const { return myCachedFlag; }

private:
    UT_Array<GU_PrimVolumeCacheLight> myLightList;
    int                               myMaxResW;
    int                               myMaxResH;
    int                               myMaxResD;
    int                               myMax2DRes;
    bool                              myIsoPoints;
    bool                              myPreMultiply;
    mutable bool                      myCachedFlag;
};

SYS_DEPRECATED_POP_DISABLE()

#endif