SOP_Node.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:        SOP Library (C++)
 *
 * COMMENTS:    The base class for all SOP operators
 *              Every SOP is responsible for filling in the following methods:
 *                      cookMe(float t);
 *
 */

#ifndef __SOP_Node_h__
#define __SOP_Node_h__

#include "SOP_API.h"

#include "SOP_Error.h"
#include "SOP_Guide.h"
#include "SOP_NodeFlags.h"
#include "SOP_ObjectAppearanceFwd.h"

#include <GOP/GOP_Manager.h>
#include <GU/GU_Detail.h>
#include <GU/GU_DetailHandle.h>
#include <GU/GU_DetailGroupPair.h>
#include <GU/GU_SelectType.h>
#include <GU/GU_SelectionSet.h>
#include <GEO/GEO_Detail.h>
#include <GA/GA_AttributeRef.h>
#include <GA/GA_Types.h>
#include <CH/CH_LocalVariable.h>
#include <OP/OP_InputChangeHelper.h>
#include <OP/OP_Network.h>
#include <PRM/PRM_Shared.h>
#include <UT/UT_Function.h>
#include <UT/UT_Lock.h>
#include <UT/UT_SymbolTable.h>
#include <UT/UT_IntArray.h>
#include <UT/UT_Array.h>
#include <UT/UT_String.h>
#include <SYS/SYS_Deprecated.h>

class UT_InfoTree;
class UT_Undo;
class GU_Selection;
class OP_OperatorTable;
class SOP_Node;
class SOP_SoftLockData;
class DD_Source;

class sop_AttributeEvaluator;
class SOP_NodeVerb;
class SOP_NodeParms;
class SOP_NodeCache;

enum SOP_UIChangeType
{
    SOP_UICHANGE_CACHE_UNLOAD_STATE = OP_UICHANGE_OPTYPE_SOP
};

extern "C" {
    SYS_VISIBILITY_EXPORT extern void   newSopOperator(OP_OperatorTable *table);
};

class sopVarInfo;

class SOP_API sop_attribRef
{
public:
    UT_String   myName;
    int         mySize;
    GA_Storage  myStorage;
};

// A call back operator for local variables:
typedef fpreal (SOP_Node::*SOP_LocalVarFunc)
                (sopVarInfo *varinfo);

class SOP_API sopVarInfo
{
public:
    CH_LocalVariable    myVar; // Actual variable name.
    int                 myTable; // Which table to use
    UT_String           myAttribName; // Name of the attribute
    GA_ROAttributeRef   myOffset; // Offset in attrib
    sopVarInfo          *mySecondaryVariable;   // For LIFE that needs two.
    int                 myTupleIndex; // Component in tuple
    fpreal              myDefault; // Default value if not present
    GA_StorageClass     myStorageClass; // Float, Int, or String
    GA_AttributeOwner   myDictionary; // Vertex, Point, Primitive, or Detail
    int                 myVaridx; // Call back parameter.
    SOP_LocalVarFunc    myCallback; // Call back function
};

// Handy function to build a meta kernel menu. Used in several sops.
SOP_API extern void     SOPfillMetaKernelMenu(
                                void *, PRM_Name *names, int size,
                                const PRM_SpareData *, const PRM_Parm *);

#define SOP_LOCALVAR_START      1000000 // Start of local variable indices

//___________________________________________________________________________

typedef void sopVisualizeCallback(void * /*data*/, SOP_Node *, OP_Context &, GU_Detail *);

class SOP_API SOP_Node : public OP_Network
{
public:
    const char                  *getChildType() const override;
    const char                  *getOpType() const override;

    OP_OpTypeId          getChildTypeID() const override;
    OP_OpTypeId          getOpTypeID() const override;

    const SOP_NodeFlags         &getFlags() const { return mySopFlags; }

    // Whether a SOP is cooking render is whether its object creator is.
    int                          isCookingRender() const override
                                 { return getCreator()->isCookingRender(); }

    // This allows us to tap into flag changes and perform unloads
    // if necessary.
    void                         opChanged(OP_EventType reason, 
                                           void *data=0) override;

    // SOP networks need some logic to switch between using
    // output nodes, display nodes, or render nodes. This function can
    // also be used to just return the Output SOPs by passing false to
    // "fallback_to_display_render".
    // Note that this function may require syncDelayedOTL to be called 
    // beforehand if the OTL has not yet been loaded.
    SOP_Node                    *getOutputSop(int outputidx,
                                        bool fallback_to_display_render = true);

    //
    // Local variable functions:
    //
    
    // Used to accumulate local variables:
    const CH_LocalVariable *resolveVariable(
            const char *name) override;
    const CH_LocalVariable *resolveExtraVariableForSyntaxHighlight(
            const char *name) override;
    
    // Each one gets a precedence from 0-3.  Resolution within
    // a precedence is undefined.
    // 0 is highest precedence.
    // This is used for generic variables like Cd 
    void                         setVariableOrder(int detail, int prim, 
                                                  int pt, int vtx);
    // Gets the index of specified level.  Index is same as the parameter
    // order in setVariableOrder
    int                          getVariableOrder(int level) const;
    // Given a variable idx, gives the precedence.
    int                          getVariablePrecedence(int var) const;

    // Wipe the table of local variables
    // This is automatically called by the setup function so
    // shouldn't be called outside it.

    bool                         usesFootprint() const override 
                                 { return true; }

    void                         setVisualizeCallback(sopVisualizeCallback *callback, void *data);

    /// Moves visualizer into our output list
    bool                         addOrMoveVisualizerToOutput(
                                        int outputidx) override;

private:
    void                         clearLocalVars();
    void                         updateLocalVarOffsets();

    // invalidate any cached data
    void                         clearCache() override;

    // This resets the attribute caches for @ style local variables.
    // It is implied by setupLocalVars, resetLocalVarRefs,
    // and clearLocalVars.
    void                         clearAttributeEvalCaches();
public:

    // the flag indicating the capture override state (on/off)
    // This override is mirroring the kinematic override at the OBJ level.
    // It is used to determine whether capture related SOPs use the
    // capture parameter or regular animation parameters for cooking
    static void                  setCaptureOverrideFlag( bool flag )
                                        {
                                            theGlobalCaptOverride = flag;
                                        }
    static bool                  getCaptureOverrideFlag() 
                                        {
                                            return theGlobalCaptOverride; 
                                        }

    
    // Build the local variable table
    // This should be done AFTER you have set the local variable
    // order & AFTER you have initialized your myGdp[*].
    bool                         setupLocalVars();

    // This resets all the myCur*s to zero so we can be sure they
    // are all cleared out.  It does NOT clear the bounding box
    // build states.
    void                         resetLocalVarRefs();

    void                         setCurGdh(int index,
                                           const GU_DetailHandle &gdh);
    void                         clearCurGdh(int index);
    const GU_DetailHandle       &getCurGdh(int index);

    void                         setCurPoint(int index,
                                           GA_Offset ptoff);
    void                         clearCurPoint(int index);
    void                         setCurVertex(int index,
                                           GA_Offset ptoff);
    void                         clearCurVertex(int index);
    void                         setCurPrim(int index,
                                           GA_Offset primoff);
    void                         clearCurPrim(int index);
    void                         setCurVertexNum(int index,
                                           exint vtxnum);
    void                         clearCurVertexNum(int index);

    // Called by evalVariableValue() to resolve local variables.
    // Note that this will not resolve global variables like $F!
    bool                         getVariableValueFP(fpreal &val, int index);

    // This gets the variable value as an fpreal value.
    // Note that you should call the base class if you don't handle the given
    // index.
    bool                         evalVariableValue(fpreal &val, int index,
                                                   int thread) override;

    // This gets the variable value as a string.  Not the string
    // corresponding to the specified index.
    // Note that you should call the base class if you don't handle the given
    // index.
    bool                         evalVariableValue(UT_String &value, int index,
                                                   int thread) override;

    /// A simple wrapper class to help in the semantic transition of specific
    /// addGenericVariable() and addSpecificVariable() overloads that now use
    /// higher level tuple index arguments instead of lower level byte offset
    /// arguments.
    class SOP_API AttribTupleIndexArg
    {
        public:
            explicit AttribTupleIndexArg(int index) : myIndex(index) {}
            operator int() const { return myIndex; }
        private:
            int          myIndex;

    };

    // Tries to add the variable to each of our gdps, using the appropriate
    // "" or "2" suffix.
    void                         addGenericVariable(const char *varname,
                                        GEO_Standard_Attributes attr,
                                        const AttribTupleIndexArg &tuple_idx,
                                        GA_StorageClass storage = GA_STORECLASS_REAL,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    void                         addGenericVariable(const char *varname, 
                                        const char *attribname,
                                        const AttribTupleIndexArg &tuple_idx,
                                        GA_StorageClass storage = GA_STORECLASS_REAL,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    void                         addGenericVariable(const char *varname,
                                        int varidx,
                                        SOP_LocalVarFunc callback,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    // Add variables to our look up table, provided they exist in the GDP
    // The addGeneric adds all the prefixed versions, then finds the first
    // one which is valid and sets itself to that.
    void                         addGenericVariable(const GU_Detail *gdp, 
                                        int gdpidx,
                                        const char *varname, 
                                        const char *attribname,
                                        const AttribTupleIndexArg &tuple_idx,
                                        GA_StorageClass storage = GA_STORECLASS_REAL,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    void                         addGenericVariable(int gpdidx,
                                        const char *varname,
                                        int varidx,
                                        SOP_LocalVarFunc callback,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    void                         addSpecificVariable(const GU_Detail *gdp, 
                                        int gdpidx,
                                        const char *varname,
                                        const char *attribname,
                                        const AttribTupleIndexArg &tuple_idx,
                                        GA_StorageClass storage,
                                        GA_AttributeOwner dictionary,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));
    void                         addSpecificVariable(int gpidx,
                                        const char *varname,
                                        int varidx,
                                        GA_AttributeOwner dictionary,
                                        SOP_LocalVarFunc callback,
                                        GA_Defaults const& defaults = GA_Defaults(0.0f));

    static int                   addCustomVariableCallback(const char *attr,
                                        const char *varname, void *data);
    void                         addCustomVariable(const char *attr,
                                        const char *varname);

    void                         cacheVarPtBox(int gpdidx);
    void                         cacheVarPrimBox(int gpdidx);

    //
    // These are the call back functions to evaluate various variable
    // types.
    //
    fpreal               varCallbackT(sopVarInfo *varinfo);

    fpreal               varCallbackPT(sopVarInfo *varinfo);
    fpreal               varCallbackPR(sopVarInfo *varinfo);
    fpreal               varCallbackVTX(sopVarInfo *varinfo);

    fpreal               varCallbackNPT(sopVarInfo *varinfo);
    fpreal               varCallbackNPR(sopVarInfo *varinfo);
    fpreal               varCallbackNVTX(sopVarInfo *varinfo);

    fpreal               varCallbackCE(sopVarInfo *varinfo);
    fpreal               varCallbackMIN(sopVarInfo *varinfo);
    fpreal               varCallbackMAX(sopVarInfo *varinfo);
    fpreal               varCallbackSIZE(sopVarInfo *varinfo);
    fpreal               varCallbackLIFE(sopVarInfo *varinfo);
    fpreal               varCallbackAGE(sopVarInfo *varinfo);
    fpreal               varCallbackBB(sopVarInfo *varinfo);
    fpreal               varCallbackWEIGHT(sopVarInfo *varinfo);

    // These methods return the variables being iterated over.  The index
    // must be 0 or 1.
    const GU_DetailHandle &curGdh(int index) const
    { UT_ASSERT(index == 0 || index == 1); return myCurGdh[index]; }

    // Note that the current vertex num will be 0 even if there is no
    // current vertex.  Use curVertex() to check if there is a current
    // vertex.
    int                  curVertexNum(int index) const
    { UT_ASSERT(index == 0 || index == 1); return myCurVtxNum[index]; }

    const GU_Detail     *curGdp(int index) const
    { UT_ASSERT(index == 0 || index == 1); return myCurGdp[index]; }

    GA_Offset            curVertex(int local_var_gdp_index) const
    { UT_ASSERT(local_var_gdp_index == 0 || local_var_gdp_index == 1);
      if (!myCurGdp[local_var_gdp_index]) return GA_INVALID_OFFSET;
      return myCurVtxOff[local_var_gdp_index]; }

    GA_Offset curPoint(int index) const
    { UT_ASSERT(index == 0 || index == 1); if (!myCurGdp[index]) return GA_INVALID_OFFSET; return myCurPtOff[index]; }

    const GEO_Primitive *curPrim(int index) const
    { UT_ASSERT(index == 0 || index == 1); if (!myCurGdp[index]) return 0; return myCurGdp[index]->getGEOPrimitive(myCurPrimOff[index]); }

    GA_Offset curPrimOff(int index) const
    { UT_ASSERT(index == 0 || index == 1); if (!myCurGdp[index]) return GA_INVALID_OFFSET; return myCurPrimOff[index]; }

    // The point bounding box is used from $BBX, $BBY, and $BBZ.
    UT_BoundingBox       curPointBBox(int index)
    {
        UT_ASSERT(index == 0 || index == 1);
        cacheVarPtBox(index);
        return myCurPtBox[index];
    }

    // The primitive bounding box is used from $MINX, $MINY, and $MINZ.
    UT_BoundingBox       curPrimBBox(int index)
    {
        UT_ASSERT(index == 0 || index == 1);
        cacheVarPrimBox(index);
        return myCurPrimBox[index];
    }


    // Function to set the pivot parm to the centroid of the input group
    void                 setPivotParmToGroupCentroid(OP_Context &context);

private:
    // Helper function for building the drop down group menus.
    void                getGroupMenuHeader(int sourcenum, const char * title,
                                            UT_String & header);

    static int          buildSopGroups(const GU_Detail *src,
                                const char *prim_header,
                                const char *pt_header,
                                const char *edge_header,
                                const char *vertex_header,
                                PRM_Name *menuEntries, int themenusize,
                                unsigned type, int start,
                                bool includeselection, const PRM_Parm *parm,
                                bool include_name_attrib = true);

    static int          buildSopEdgeGroups(const GU_Detail *src,
                                const char * edge_header,
                                const char *prim_header, const char *pt_header,
                                const char *vertex_header,
                                PRM_Name *menuEntries, int themenusize, 
                                bool addprim, int start,
                                const PRM_Parm *parm);

    static int          buildSopBreakpointGroups(const GU_Detail *src,
                                const char * brkpt_header,
                                const char * prim_header, const char *pt_header,
                                const char * edge_header,
                                const char *vertex_header,
                                PRM_Name *choicenames, int menusize, 
                                bool addprim, int start,
                                const PRM_Parm *parm);

public:
    //  The following method has to be public for some static functions in
    //  the code
    static void          buildGroupsFromSop( SOP_Node * src_sop, 
                                    const PRM_Parm *parm,
                                    const PRM_SpareData *spare, 
                                    unsigned type, int start,
                                    PRM_Name *menuEntries, int thelistsize,
                                    bool include_name_attrib = true);

    static int           buildEdgeGroupsFromSop( SOP_Node * src_sop, 
                                    const PRM_Parm *parm,
                                    const PRM_SpareData *spare, 
                                    bool addprim, int start,
                                    PRM_Name *menuEntries, int thelistsize );

    static int           buildBreakpointGroupsFromSop( SOP_Node * src_sop, 
                                    const PRM_Parm *parm,
                                    const PRM_SpareData *spare, 
                                    bool addprim, int start,
                                    PRM_Name *menuEntries, int thelistsize );

    void                 buildNamedPrims(int thesourcenum,
                                        PRM_Name *thechoicenames,
                                        int themenusize,
                                        const PRM_Parm *parm,
                                        bool globvectors,
                                        bool numberedvolumes);

    void                 buildInputGroups(int thesourcenum,
                                        PRM_Name *thechoicenames,
                                        int themenusize,
                                        unsigned type, int start,
                                        bool includeselection,
                                        const PRM_Parm *parm);

    int                  buildInputEdgeGroups(int sourcenum,
                                        PRM_Name *choicenames, int menusize,
                                        bool addprim, int start,
                                        const PRM_Parm *parm);

    int                  buildInputBreakpointGroups(int sourcenum, 
                                        PRM_Name *choicenames, int menusize,
                                        bool addprim, int start,
                                        const PRM_Parm *parm);

    OP_LockTypes         setModelLock(OP_LockTypes lock_type, 
                                      void *modeler = nullptr,
                                      bool allow_softlock_promotion = false,
                                      UT_Undo *undo = nullptr) override;

    //  Nobody should have to override this, but it's public for other people
    OP_DataType          getCookedDataType() const override;

    void                *getCookedData(const OP_Context &ctx) override;

    bool                 getBoundingBox(UT_BoundingBox &box, 
                                        OP_Context &ctx) override;

    // Get cooked geometry. If "forced" is true and cooking fails, we create
    // an empty gdp and clear the cooking flags.
    // Note that the resulting handle may be reused in future cooks!
    // To prevent the handle from being reused, call addPreserveRequest()
    // on the handle.
    const GU_Detail     *getCookedGeo(OP_Context &, int forced = 0);
    GU_DetailHandle      getCookedGeoHandle(OP_Context &, int forced = 0);

    // Cook an Output at index outputidx.
    // Add data interests to interests pointer if it isn't null.
    // If **output isn't null, return the node that was cooked inside the 
    // subnet or nullptr if the node is bypassed.
    GU_DetailHandle      cookOutput(OP_Context &context, int outputidx, SOP_Node *interests);

    const SOP_Guide     *getCookedGuide1() const;
    const SOP_Guide     *getCookedGuide2() const;

    // Cooks the view output sop if this is a subnet, otherwise itself.
    // If it is redirected, the optional target_sop will be non-null
    // and point to the actual SOP cooked (and to which dependencies
    // should be added, as well as flag dependencies to this node)
    GU_DetailHandle      getCookedViewGeoHandle(OP_Context &, int forced = 0, SOP_Node **target_sop = nullptr);

    // This is similar to the getCookedGeo except it merely returns the
    // cached GEO, if any.  If none, it returns NULL without trying to cook.
    const GU_Detail     *getLastGeo() const;

    // Returns the equivalent of getLastGeo of the given input.  This lets
    // you get an input geometry without locking the input and without
    // risking cooking it.  It can, and will, return NULL without trying
    // to cook in many cases.
    const GU_Detail     *getInputLastGeo(int input, fpreal time) const;

    OP_ERROR             cookGuide1(OP_Context &context);
    OP_ERROR             cookGuide2(OP_Context &context);


    enum class GuideType
    {
        VIEWPORT,        // To be drawn by viewport
        STATE            // To pass geometry to states
    };

    virtual int          getNumGuides() { return 0; }
    virtual GuideType    getGuideType(int guide_idx)
                            { return GuideType::VIEWPORT; }
    virtual bool         isGuideTimeDep(int guide_idx) const { return false; }

    GU_DetailHandle      cookGuide(int guide_idx, OP_Context &context);

    // The guide list can consist of either GOP_Guide derived objects or simple
    // GU_Detail objects (but not a combination).  This method is used to query
    // which of the two, if any, the node generates.
    virtual GOP_GuideListType   getGuideListType() const
                                    { return OP_GUIDELIST_GUDETAIL; }

    OP_ERROR             lockInput(unsigned idx, 
                                   OP_Context &context) override;
    void                 unlockInput(unsigned idx) override;
    OP_ERROR             lockInputs(OP_Context &context) override;
    void                 unlockInputs() override;

    static void          buildOperatorTable(OP_OperatorTable &table);
    static void          initializeExpressions();

    // Change the string into a valid group name.  A return value of true
    // indicates that the string needed changing, in which case severity
    // specifies the level of error this method generated (UT_ERROR_NONE,
    // UT_ERROR_WARNING, or UT_ERROR_ABORT).
    // Note that this does not force the name to be non-zero in length.
    bool                 forceValidGroupName(UT_String &name,
                                             UT_ErrorSeverity severity);
    static bool          forceValidGroupName(UT_String &name,
                                             UT_ErrorManager *error,
                                             UT_ErrorSeverity severity);
    // Change the string into a valid group prefix.  A return value of true
    // indicates that the string needed changing, in which case severity
    // specifies the level of error this method generated (UT_ERROR_NONE,
    // UT_ERROR_WARNING, or UT_ERROR_ABORT).
    // Note that this does not force the prefix to be non-zero in length.
    bool                 forceValidGroupPrefix(UT_String &prefix,
                                               UT_ErrorSeverity severity);

    void                 expandGroupMask(const char *pattern,
                                         UT_String &outNames,
                                         GA_GroupType type,
                                         const GU_Detail *pgdp);
    void                 expandGroupMask(const char *pattern,
                                         UT_String &outNames,
                                         GA_GroupType type)
                         { expandGroupMask(pattern, outNames, type, gdp); }

    /// Typedef to help make use of GroupCreator less verbose.
    typedef GOP_Manager::GroupCreator GroupCreator;

    const GA_PrimitiveGroup     *parsePrimitiveGroups(const char *pattern,
                                                      const GroupCreator &creator,
                                                      bool allow_numeric = true,
                                                      bool ordered = false,
                                                      bool strict = false,
                                                      GA_Index offset = GA_Index(0));
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    const GA_PrimitiveGroup     *parsePrimitiveGroups(const char *pattern,
                                                      GU_Detail *pgdp,
                                                      int allow_numeric=1,
                                                      int ordered = 1,
                                                      bool strict = false,
                                                      int offset = 0);
    const GA_PrimitiveGroup     *parsePrimitiveGroups(const char *pattern)
                                 { return parsePrimitiveGroups(pattern, GroupCreator(gdp, false), true, true); }

    GA_PrimitiveGroup           *parsePrimitiveGroupsCopy(const char *pattern,
                                                          const GroupCreator &creator,
                                                          bool allow_numeric = true,
                                                          bool ordered = false,
                                                          bool strict = false);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    GA_PrimitiveGroup           *parsePrimitiveGroupsCopy(const char *pattern,
                                                          GU_Detail *pgdp,
                                                          int allow_numeric=1,
                                                          int ordered = 1,
                                                          bool strict = false);
    GA_PrimitiveGroup           *parsePrimitiveGroupsCopy(const char *pattern)
                                 { return parsePrimitiveGroupsCopy(pattern, GroupCreator(gdp, false), true, true); }

    const GA_PointGroup         *parsePointGroups(const char *pattern,
                                                  const GroupCreator &creator,
                                                  bool allow_numeric = true,
                                                  bool ordered = false,
                                                  bool strict = false,
                                                  GA_Index offset = GA_Index(0));
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    const GA_PointGroup         *parsePointGroups(const char *pattern,
                                                  GU_Detail *pgdp,
                                                  int allow_numeric=1,
                                                  int ordered = 1,
                                                  bool strict = false,
                                                  int offset = 0);
    const GA_PointGroup         *parsePointGroups(const char *pattern)
                                 { return parsePointGroups(pattern, GroupCreator(gdp, false), true, true); }

    GA_PointGroup               *parsePointGroupsCopy(const char *pattern,
                                                  const GroupCreator &creator,
                                                  bool allow_numeric = true,
                                                  bool ordered = false,
                                                  bool strict = false);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    GA_PointGroup               *parsePointGroupsCopy(const char *pattern,
                                                  GU_Detail *pgdp,
                                                  int allow_numeric=1,
                                                  int ordered = 1,
                                                  bool strict = false);
    GA_PointGroup               *parsePointGroupsCopy(const char *pattern)
                                 { return parsePointGroupsCopy(pattern, GroupCreator(gdp, false), true, true); }

    const GA_EdgeGroup          *parseEdgeGroups(const char *pattern,
                                                 const GU_Detail *pgdp,
                                                 bool strict = true,
                                                 GA_Index prim_offset = GA_Index(0),
                                                 GA_Index point_offset = GA_Index(0));
    const GA_EdgeGroup          *parseEdgeGroups(const char *pattern)
                                 { return parseEdgeGroups(pattern, (const GU_Detail *)gdp); }

    GA_EdgeGroup                *parseEdgeGroupsCopy(const char *pattern,
                                                     const GU_Detail *pgdp);
    GA_EdgeGroup                *parseEdgeGroupsCopy(const char *pattern)
                                 { return parseEdgeGroupsCopy(pattern, (const GU_Detail *)gdp); }

    const GA_BreakpointGroup    *parseBreakpointGroups(const char *pattern,
                                                       const GU_Detail *pgdp,
                                                       bool strict = true,
                                                       GA_Index offset = GA_Index(0));
    const GA_BreakpointGroup    *parseBreakpointGroups(const char *pattern)
                                 { return parseBreakpointGroups(pattern, (const GU_Detail *)gdp); }

    GA_BreakpointGroup          *parseBreakpointGroupsCopy(const char *pattern,
                                                           const GU_Detail *pgdp);
    GA_BreakpointGroup          *parseBreakpointGroupsCopy(const char *pattern)
                                {return parseBreakpointGroupsCopy(pattern,(const GU_Detail *)gdp);}

    const GA_VertexGroup        *parseVertexGroups(const char *pattern,
                                                       const GU_Detail *pgdp,
                                                       bool strict = true,
                                                       GA_Index offset = GA_Index(0));
    const GA_VertexGroup        *parseVertexGroups(const char *pattern)
                                 { return parseVertexGroups(pattern, (const GU_Detail *)gdp); }

    GA_VertexGroup              *parseVertexGroupsCopy(const char *pattern,
                                                           const GU_Detail *pgdp);
    GA_VertexGroup              *parseVertexGroupsCopy(const char *pattern)
                                 { return parseVertexGroupsCopy(pattern, (const GU_Detail *)gdp); }

    const GA_Group              *parseAllGroups(const char *pattern,
                                    const GroupCreator &creator,
                                    bool allow_numeric = true,
                                    bool ordered = false,
                                    GA_GroupMaskType mask=GA_GMASK_FULL_MASK,
                                    GA_GroupType bestguess=GA_GROUP_PRIMITIVE);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    const GA_Group              *parseAllGroups(const char *pattern,
                                    GU_Detail *pgdp,
                                    int allow_numeric=1,
                                    int ordered=1,
                                    GA_GroupMaskType mask=GA_GMASK_FULL_MASK);
    const GA_Group              *parseAllGroups(const char *pattern)
                                 { return parseAllGroups(pattern, GroupCreator(gdp, false), true, true); }

    GA_Group            *parseAllGroupsCopy(const char *pattern,
                                    const GroupCreator &creator,
                                    bool allow_numeric = true,
                                    bool ordered = false,
                                    GA_GroupMaskType mask=GA_GMASK_FULL_MASK,
                                    GA_GroupType bestguess=GA_GROUP_PRIMITIVE);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function and dont cast away const on input geo)
    GA_Group            *parseAllGroupsCopy(const char *pattern,
                                    GU_Detail *pgdp,
                                    int allow_numeric=1,
                                    int ordered=1,
                                    GA_GroupMaskType mask=GA_GMASK_FULL_MASK);
    GA_Group            *parseAllGroupsCopy(const char *pattern)
                                 { return parseAllGroupsCopy(pattern, GroupCreator(gdp, false), true, true); }

    // Explicitly destroy an adhoc group. Usually this is done on your behalf
    // internally, after the SOP cooks, but this method allows you to delete
    // an adhoc group within the cooking methods. Return is 0 if not found.
    // An adhoc group is created when the SOP groups are parsed, or when you
    // call createAdhocPrimGroup() or createAdhocPointGroup().

    int                  destroyAdhocGroup (const GA_Group *group)
                         { return myGroupParse.destroyAdhocGroup(group); }
    void                 destroyAdhocGroups()
                         { myGroupParse.destroyAdhocGroups(); }
    void                 destroyAdhocGroups(const GU_Detail *g)
                         { myGroupParse.destroyAdhocGroups(g); }

    // Set the selection based on the given geometry:
    
    /// Update the selection object on the detail to match the one for this
    /// SOP node.
    SYS_DEPRECATED(16.0)
    void updateUserSelectionOnDetail();
    
    /// Set a specific override selection for this node only. Automatically 
    /// updates the selection object on the detail.
    SYS_DEPRECATED(16.0)
    void setNodeSelectionSet(GU_SelectionSetHandle selection_set);
    
    SYS_DEPRECATED(16.0)
    GU_SelectionSetHandle nodeSelectionSet() const;
    
    /// Clears the override selection. Automatically updates the selection 
    /// object on the detail.
    SYS_DEPRECATED(16.0)
    void clearNodeSelectionSet();
    
    /// Copies the cooked selection generated by the SOP to the detail-external
    /// user selection. If \c context is NULL, then the last successful cook,
    /// if any, is used.
    SYS_DEPRECATED(16.0)
    void copyCookedSelectionToUserSelection(OP_Context *context = 0);
    
public:
    
    SYS_DEPRECATED_PUSH_DISABLE()
    SYS_DEPRECATED_REPLACE(14.0, "SOP_Node::select(GA_GroupType gtype)")
    void                 select(GU_SelectionType stype);
    SYS_DEPRECATED_POP_DISABLE()
    
    void                 select(GA_GroupType gtype = GA_GROUP_PRIMITIVE);
    
    void                 select(GU_SelectionHandle selection, 
                                bool add_to_sel = false);
    
                         // Select the group. opt use its type as sel type
    void                 select(const GA_Group &group, bool use_gtype = true,
                                bool add_to_sel = false);
    
    void                 select(const GEO_Primitive &prim, bool sel_prim = true,
                                bool add_to_sel = false);
    void                 selectPrimitive(GA_Offset primoff,
                                bool prim_sel = true,
                                bool add_to_sel = false);
    void                 selectPoint(GA_Offset ptoff, bool point_sel = true,
                                bool add_to_sel = false);
    void                 selectFrom(const GEO_Primitive &prim, bool sel_prim = true,
                                    bool add_to_sel = false);
    void                 selectPointsFrom(GA_Offset ptoff, bool point_sel = true,
                                    bool add_to_sel = false);
    void                 select(const GA_Range &range, bool use_rtype = true,
                                bool add_to_sel = false);

    // Selects input based on the group supplied and the group type.  If
    // group is not null, then it's type is used, otherwise the group type
    // is used.
    void                 selectInputGroup(const GA_Group *group,
                                          GA_GroupType grouptype);
    // FIXME: Delete this function once it's swept out, because
    //        the int corresponds with PRM_GroupType instead of
    //        GA_GroupType.
    void                 selectInputGroup(const GA_Group *group,
                                          int grouptype);

    // If no selection is present, then create a new empty primitive cook   
    // selection group. Otherwise, clear the selection.
    void                 clearSelection();

    SYS_DEPRECATED_PUSH_DISABLE()
    SYS_DEPRECATED_REPLACE(14.0, "SOP_Node::clearSelection(GA_GroupType gtype)")
    void                 clearSelection(GU_SelectionType stype);
    SYS_DEPRECATED_POP_DISABLE()

    /// If the cook selection group is not of the given type, create an empty
    /// cook selection group of that type. Otherwise, clear the existing cook
    /// selection group.
    void                 clearSelection(GA_GroupType gtype);
    
    // Blow away the selection and reinitialize it to 0. Much more radical
    // than clearSelection(), which leaves behind a clean, empty selection.
    // This method returns 1 if it had anything to destroy, else 0.
    bool                 destroySelection();

    // Return 1 if selection is enabled, 0 if false.
    bool                 selectionEnabled() const
                         {
                             return getHighlight();
                         }

    bool                 hasCookedSelection() const
                         {
                             return myHasCookedSelection;
                         }

    // Copy all the temp selections from the given SOP into this one. All
    // existing selections on this SOP will be destroyed first. If there are
    // no temp selections, then the cook selection is copied into a temp
    // selection.
    bool                 copyTempSelections(OP_Context &context, SOP_Node *src);

    /// Functions to convert between different group type representations.
    /// When no group type can be guessed, GA_GROUP_INVALID,
    /// PRM_GROUPTYPE_GUESS, PRM_UVGROUPTYPE_GUESS, or GA_ATTRIB_INVALID
    /// Will be returned.
    /// @{
    static GA_GroupType getGAGroupType(PRM_GroupType prmgrouptype, GA_GroupType guess = GA_GROUP_INVALID);
    static GA_GroupType getGAGroupType(PRM_UVGroupType prmuvgrouptype, GA_GroupType guess = GA_GROUP_INVALID);
    SYS_DEPRECATED_PUSH_DISABLE()
    static GA_GroupType getGAGroupType(GU_SelectionType guseltype);
    SYS_DEPRECATED_POP_DISABLE()
    static GA_GroupType getGAGroupType(GA_AttributeOwner owner);
    static GA_GroupType getGAGroupType(const char *possiblename, GA_GroupType guess = GA_GROUP_INVALID);
    static PRM_GroupType getPRMGroupType(GA_GroupType gagrouptype);
    static PRM_UVGroupType getPRMUVGroupType(GA_GroupType gagrouptype);
    SYS_DEPRECATED_PUSH_DISABLE()
    static GU_SelectionType getGUSelType(GA_GroupType gagrouptype, GU_SelectionType guess = GU_SPrimitive);
    SYS_DEPRECATED_POP_DISABLE()
    static GA_AttributeOwner getGroupAttribOwner(GA_GroupType gagrouptype, GA_AttributeOwner guess = GA_ATTRIB_INVALID);
    static const char *getGroupTypeName(GA_GroupType gagrouptype, const char *guess = "guess");
    /// @}


    virtual void         resetSimulation () {}

    int                  getNetOverviewColor( UT_Color &color ) override;

    void                 addInstanceReference(SOP_Node *node);
    void                 clearInstanceReference(SOP_Node *node);

    /// This makes *this an instance of node.  It must be called within
    /// a cookMySop.  myGdpHandle is assumed to have an active write lock.
    /// this->gdp is updated to point to the new gdp.  It is assumed
    /// that clearInstance() has already been called.
    /// The node that you pass in must be cooked prior to instancing!
    /// This has occured for free if it was lockInputed.  Otherwise,
    /// one must use getCookedGeoHandle to cook the SOP.
    void                 makeInstanceOf(SOP_Node *node, OP_Context &context, int inputidx);

    /// This makes us shallow copy the given gu_detailhandle.
    /// We are marked as a preserve request so with our next
    /// cook we will not re-use this gdp.  This should be
    /// called while cooking - ie, gdp is locked.
    /// While you can alter gdp afterwards, it is a bad idea as
    /// you will also alter the source.
    void                 makeInstanceOf(GU_ConstDetailHandle gdh);

    /// A hint to this node that it is about to be cooked at an
    /// unexpected time so shouldn't reuse the existing GDP. 
    /// Should not be used without understanding the consequences.
    virtual void         makePreserveRequest();

    virtual void         setVisualization(bool) {}
    virtual void         setForceCapture(bool) {}

    void                 getNodeSpecificInfoText(OP_Context &context,
                                OP_NodeInfoParms &iparms) override;

    /// Fill in tree with this SOP's details
    void                 fillInfoTreeNodeSpecific(UT_InfoTree &tree, 
                                const OP_NodeInfoTreeParms &parms) override;
    /// Helper class that puts our geometry info into a branch.
    void                 fillInfoTreeForGeometry(UT_InfoTree &branch,
                                const OP_NodeInfoTreeParms &parms);

    /// Return an interface to apply appearance operations.  The default
    /// behaviour is to return a NULL pointer.
    virtual SOP_ObjectAppearancePtr     getObjectAppearance();

    /// Spare data used to determine which input the group menu is associated
    /// with.
    /// Because these rely on static initialization, do NOT use,
    /// use the sparedata functions instead.
    static PRM_SpareData        theFirstInput;
    static PRM_SpareData        theSecondInput;
    static PRM_SpareData        theThirdInput;
    static PRM_SpareData        theFourthInput;
    /// Uses the second input if present, else the first input.
    /// FIXME: Support for this has only been added to allAttribsMenu.
    static PRM_SpareData        theSecondElseFirstInput;

    /// Spare data to determine whcih input the group menu is associated
    /// with.
    static PRM_SpareData        *sparedataFirstInput();
    static PRM_SpareData        *sparedataSecondInput();
    static PRM_SpareData        *sparedataThirdInput();
    static PRM_SpareData        *sparedataFourthInput();
    static PRM_SpareData        *sparedataSecondElseFirstInput();

    ///Absolute Width
    fpreal               getW() const override;
    ///Absolute Height
    fpreal               getH() const override;


    /// Provide a verb interface to this SOP.  Verb interfaces are designed
    /// to ensure thread safety and prevent any persistent storage between
    /// cooks.
    virtual const SOP_NodeVerb  *cookVerb() const { return 0; }

protected:
             SOP_Node(OP_Network *parent, const char *name, OP_Operator *entry);
            ~SOP_Node() override;

    // We listen to these as our Cache relies on unique ids, so must
    // know when they are no longer valid.
    void                 setUniqueId(int id) override;
    void                 clearUniqueId() override;

    // Remove the adhoc group(s) from the list of adhocs to be deleted when
    // cooking ends. This way, deletion of the group becomes your
    // responsibility. You should rarely and cautiously use these methods.
    // Most of the time you need destroyAdhocGroup[s] instead.
    // You *MUST* use the parse.*Copy methods to get the adhoc group.
    // Otherwise, you may delete a group which you don't have ownership of.
    int                  removeAdhocGroup (const GA_Group *group)
                         { return myGroupParse.removeAdhocGroup(group); }
    void                 removeAdhocGroups()
                         { myGroupParse.removeAdhocGroups(); }

    //  Protected virtuals:
    //
    //  "cookMe" is where the actual work is done.
    //  The error is returned (OP_ERR_NONE on success).
    //
    OP_ERROR             cookMe(OP_Context &context) override;
    OP_ERROR             bypassMe(OP_Context &context, 
                                  int &copied_input) override;
    
    virtual OP_ERROR     cookMySop(OP_Context &context) = 0;

    /// This is meant to be called within cookMySop() if all you
    /// want to do is invoke the verb returned by cookVerb().
    OP_ERROR             cookMyselfAsVerb(OP_Context &context);

    // The interests node is the node to get an extra input on whatever
    // actual real data node is at the source of this chain.
    virtual GU_DetailHandle cookMySopOutput(OP_Context &context, int outputidx, SOP_Node *interests);

    virtual OP_ERROR     cookMyGuide1(OP_Context &context);
    virtual OP_ERROR     cookMyGuide2(OP_Context &context);

    virtual
    GU_DetailHandle      cookMyGuide(int guide_idx, OP_Context &context)
                            { return GU_DetailHandle(); }



    OP_ERROR             pubCookInputGroups(OP_Context &context, 
                                            int alone = 0) override;

    void                 notifyGroupParmListeners(
                            int parm_index, int group_type_index,
                            const GU_Detail *pgdp, const GA_Group *group);

    /// The cookInput.+Groups functions are helper functions that look at
    /// your Group Name and Group Type parameters (the offsets for which
    /// are passed in parm_index, for Group Name, and group_type_index,
    /// for group_type), evaluate them, and then call parse.+Group on that
    /// group name. For every method other than cookInputAllGroups,
    /// group_type_index is used only to determine whether the parm is dirty.
    /// The pointer group is set as a return value.
    /// If alone is true, we are cooking for a selector, and can't assume that
    /// our gdp is valid (because it might not have been constructed by now).
    /// If allow_reference is true, the group returned may not be modified.
    /// If fetchgdp is true and alone is true, these new groups will be
    /// created on the input_index-th input (because the gdp isn't constructed
    /// yet).
    /// If fetchgdp is true and alone is false, false, groups will be
    /// constructed on the current gdp.
    /// If fetchgdp is false, you must supply a gdp to create groups on in
    /// the paramerer pgdp.
    OP_ERROR             cookInputPrimitiveGroups(OP_Context &context,
                            const GA_PrimitiveGroup *&group,
                            bool alone = false, bool do_selection = true,
                            int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = true,
                            bool ordered = false,
                            bool detached = true,
                            int input_index = 0);
    OP_ERROR             cookInputPrimitiveGroups(OP_Context &context,
                            const GA_PrimitiveGroup *&group,
                            bool alone, bool do_selection,
                            int parm_index,
                            int group_type_index,
                            bool allow_reference,
                            bool ordered,
                            const GroupCreator &creator);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo and be careful since defaults have changed)
    virtual OP_ERROR     cookInputPrimitiveGroups(OP_Context &context,
                            const GA_PrimitiveGroup *&group,
                            GU_DetailGroupPair &detail_group_pair,
                            int alone = 0, bool do_selection = true,
                            int input_index = 0, int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = true,
                            bool fetchgdp = true,
                            GU_Detail *pgdp = NULL); 

    /// See cookInputPrimitiveGroups.
    OP_ERROR             cookInputPointGroups(OP_Context &context,
                            const GA_PointGroup *&group,
                            bool alone = false, bool do_selection = true,
                            int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = true,
                            bool ordered = false,
                            bool detached = true,
                            int input_index = 0);
    OP_ERROR             cookInputPointGroups(OP_Context &context,
                            const GA_PointGroup *&group,
                            bool alone, bool do_selection,
                            int parm_index,
                            int group_type_index,
                            bool allow_reference,
                            bool ordered,
                            const GroupCreator &creator);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo and be careful since defaults have changed)
    virtual OP_ERROR     cookInputPointGroups(OP_Context &context,
                            const GA_PointGroup *&group,
                            GU_DetailGroupPair &detail_group_pair,
                            int alone = 0, bool do_selection = true,
                            int input_index = 0, int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = true,
                            bool fetchgdp = true,
                            GU_Detail *pgdp = NULL);

    /// See cookInputPrimitiveGroups.
    OP_ERROR             cookInputEdgeGroups(OP_Context &context,
                            const GA_EdgeGroup *&group,
                            bool alone = false, bool do_selection = true,
                            int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = true,
                            int input_index = 0);
    OP_ERROR             cookInputEdgeGroups(OP_Context &context,
                            const GA_EdgeGroup *&group,
                            bool alone, bool do_selection,
                            int parm_index,
                            int group_type_index,
                            bool allow_reference,
                            const GU_Detail *pgdp);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo and be careful since defaults have changed)
    virtual OP_ERROR     cookInputEdgeGroups(OP_Context &context,
                            const GA_EdgeGroup *&group,
                            GU_DetailGroupPair &detail_group_pair,
                            int alone = 0, bool do_selection = true,
                            int input_index = 0, int parm_index = 0,
                            int group_type_index = -1,
                            // JML: I do not know why Edge Groups
                            // used Copy instead of the reference version.
                            // They are left like this so as to not cause
                            // problems unforeseen.
                            bool allow_reference = false,
                            bool fetchgdp = true,
                            GU_Detail *pgdp = NULL);

    /// See cookInputPrimitiveGroups. Also, is_default_prim only affects
    /// cases when we're not able to guess the type of groups; in those
    /// cases, we try again with primitive groups if is_default_prim is
    /// true, and point groups otherwise.
     OP_ERROR            cookInputAllGroups(OP_Context &context,
                            const GA_Group *&group,
                            bool alone = false, bool do_selection = true,
                            int parm_index = 0,
                            int group_type_index = -1,
                            GA_GroupType grouptype = GA_GROUP_INVALID,
                            bool allow_reference = true,
                            bool is_default_prim = true,
                            bool ordered = false,
                            bool detached = true,
                            int input_index = 0);
    OP_ERROR             cookInputAllGroups(OP_Context &context,
                            const GA_Group *&group,
                            bool alone, bool do_selection,
                            int parm_index,
                            int group_type_index,
                            GA_GroupType grouptype,
                            bool allow_reference,
                            bool is_default_prim,
                            bool ordered,
                            const GroupCreator &creator);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo and be careful since defaults have changed)
    virtual OP_ERROR     cookInputAllGroups(OP_Context &context,
                            const GA_Group *&group,
                            GU_DetailGroupPair  &detail_group_pair,
                            int alone = 0, bool do_selection = true,
                            int input_index = 0, int parm_index = 0,
                            int group_type_index = -1,
                            bool allow_reference = false,
                            bool is_default_prim = true,
                            bool fetchgdp = true,
                            GU_Detail *pgdp = NULL);

    /// Parse the input group specified by groupname, of type grouptype,
    /// in detail gdp. If allow_reference is true, this group cannot be
    /// later modified. If is_default_prim is true, if the group's type cannot
    /// be guessed, we'll try with a primitive group; otherwise, we'll try
    /// with a point group.
    const GA_Group *parseInputGroup(const UT_String &groupname,
                            GA_GroupType grouptype, const GroupCreator &creator,
                            bool allow_reference, bool is_default_prim,
                            bool ordered=false);
    const GA_Group *parseInputGroup(const UT_String &groupname,
                            int grouptype, GU_Detail *gdp,
                            bool allow_reference, bool is_default_prim);

    /// Retrieve a list of the local variables visible to this node.
    /// This list is unsorted and may contain duplicates.
    void                buildLocalVarNames(UT_StringArray &out_vars) override;

private:
    /// Helper function for cookInput.+Groups. You shouldn't need to use it.
    OP_ERROR cookInputGroupsPrologue(OP_Context &context,
                                     bool alone, int input_index, bool detached,
                                     GroupCreator &creator);
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function)
    OP_ERROR cookInputGroupsPrologue(OP_Context &context, bool fetchgdp,
                                     bool alone, int input_index,
                                     GU_Detail *&pgdp);

    /// Helper function for cookInput.+Groups. You shouldn't need to use it.
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator version of function)
    void cookInputGroupsEpilogue(int parm_index, int group_type_index,
                                 const GU_Detail *pgdp, const GA_Group *group,
                                 int input_index, bool fetchgdp, bool alone);

protected:
    void                 inputConnectChanged(int which_input) override;

//_________________________________________________________________________
//
//  Some very useful methods used in cooking SOPs, convenience if you will
//_________________________________________________________________________
//

    // Note that the context parameter is unused!
    const GU_Detail     *inputGeo(int index, OP_Context &)
                         { return inputGeo(index); }
    const GU_Detail     *inputGeo(int index) const;
    GU_DetailHandle      inputGeoHandle(int index) const;

//_________________________________________________________________________
//
//  Convenience Error methods...
//_________________________________________________________________________
//
public:
    void                 addError(int code, const char *msg = 0)
                         { getLockedErrorManager()->addError(SOP_OPTYPE_NAME,
                                                             code, msg); }
    void                 addMessage(SOP_ErrorCodes code, const char *msg = 0)
                         { getLockedErrorManager()->addMessage(SOP_OPTYPE_NAME,
                                                               code, msg); }
    void                 addWarning(SOP_ErrorCodes code, const char *msg = 0)
                         { getLockedErrorManager()->addWarning(SOP_OPTYPE_NAME,
                                                               code, msg); }
    void                 addFatal(SOP_ErrorCodes code, const char *msg = 0)
                         { getLockedErrorManager()->addFatal(SOP_OPTYPE_NAME,
                                                             code, msg); }
    void                 addSystemError(const char *msg = 0)
                         { getLockedErrorManager()->systemError(msg);}
    void                 addCommonError(UT_CommonErrorCode what,
                                        const char *msg = 0)
                         { getLockedErrorManager()->commonError(what, msg);}
    void                 addCommonWarning(UT_CommonErrorCode what,
                                        const char *msg = 0)
                         { getLockedErrorManager()->commonWarning(what, msg);}

protected:
    //
    //  Methods for dealing with groups in SOPs

    /// We want these public as we it is perfectly fine to use them in
    /// static parm templates.  This occurs, for example, when instancing
    /// multiparms.
public:
    static PRM_ChoiceList        allGroupMenu;        // All the groups
    static PRM_ChoiceList        groupMenu;           // Prim and point groups
    static PRM_ChoiceList        primGroupMenu;
    static PRM_ChoiceList        pointGroupMenu;
    static PRM_ChoiceList        edgeGroupMenu;
    static PRM_ChoiceList        edgePointGroupMenu;  // Edge and point groups
    static PRM_ChoiceList        breakpointGroupMenu;
    static PRM_ChoiceList        primNamedGroupMenu;  // Named prim grps only
    static PRM_ChoiceList        pointNamedGroupMenu; // Named pt groups only
    static PRM_ChoiceList        edgeNamedGroupMenu;  // Named edge groups only
    static PRM_ChoiceList        vertexNamedGroupMenu;// Named vertex groups only

    static PRM_ChoiceList        allGroupReplaceMenu;         // All the groups
    static PRM_ChoiceList        groupReplaceMenu;            // Prim and point groups
    static PRM_ChoiceList        primGroupReplaceMenu;
    static PRM_ChoiceList        pointGroupReplaceMenu;
    static PRM_ChoiceList        edgeGroupReplaceMenu;
    static PRM_ChoiceList        edgePointGroupReplaceMenu;  // Edge and point groups
    static PRM_ChoiceList        breakpointGroupReplaceMenu;
    static PRM_ChoiceList        primNamedGroupReplaceMenu;  // Named prim grps only
    static PRM_ChoiceList        pointNamedGroupReplaceMenu; // Named pt groups only
    static PRM_ChoiceList        edgeNamedGroupReplaceMenu;  // Named edge groups only
    static PRM_ChoiceList        vertexNamedGroupReplaceMenu;// Named vertex groups only

    static PRM_ChoiceList        groupNameMenu;
    static PRM_ChoiceList        namedPrimsMenu;
    static PRM_ChoiceList        namedPrimsGlobMenu;
    static PRM_ChoiceList        namedVolumesMenu;
    static PRM_ChoiceList        namedVolumesGlobMenu;

    static PRM_ChoiceList        allAttribMenu;
    static PRM_ChoiceList        detailAttribMenu;
    static PRM_ChoiceList        primAttribMenu;
    static PRM_ChoiceList        pointAttribMenu;
    static PRM_ChoiceList        vertexAttribMenu;

    static PRM_ChoiceList        allAttribReplaceMenu;
    static PRM_ChoiceList        detailAttribReplaceMenu;
    static PRM_ChoiceList        primAttribReplaceMenu;
    static PRM_ChoiceList        pointAttribReplaceMenu;
    static PRM_ChoiceList        vertexAttribReplaceMenu;

    static PRM_ChoiceList        allTextureCoordMenu;
    static PRM_ChoiceList        vertexTextureCoordMenu;

    /// Returns spare data that adds a "group select" button which runs a
    /// python script to invoke soputils.selectGroupParm. The group_type
    /// should be used if only one group type is supported by the group parm.
    /// The group_type_parm value should be used (with group_type set to
    /// GA_GROUP_INVALID) if there is a separate menu parameter to specify
    /// the group type. The input_index indicates which input of the SOP
    /// the group refers to. The merge_spare_data can contain any other
    /// PRM_SpareData that you want on the parameter (the most common being
    /// "&SOP_Node::theSecondInput" to control the input used by the
    /// SOP_Node::primGroupMenu, SOP_Node::pointGroupMenu, or other SOP_Node
    /// standard parameter group menus.
    /// If the SOP requires or supports multi-stage selection, then it's 
    /// possible to show previous selections during this picking sessions to
    /// assist the user. To do this, a comma-separated list of group types /  
    /// group parm names can be given with assoc_groups 
    /// (e.g. "point my_point_group_parm, edge my_edge_group_parm"). 
    /// If use_name_attr is given, the numbered group will be converted to
    /// "@name=group" format.
    /// If select_script is given, it will replace the
    ///  `soputils.selectGroupParm(kwargs)` line.
    enum class GroupSelectAsOrdered
    {
        /// AUTO: Use any bound selectors to determine whether the selection
        ///       should be ordered or not.
        AUTO,
        /// FORCE_UNORDERED: Force an unordered selection.
        FORCE_UNORDERED,
        /// FORCE_ORDERED: Force an ordered selection.
        FORCE_ORDERED
    };
    static PRM_SpareData        *getGroupSelectButton(
                                        GA_GroupType group_type,
                                        const char *group_type_parm = NULL,
                                        int input_index = 0,
                                        PRM_SpareData *merge_spare_data = NULL,
                                        const char *assoc_groups = NULL,
                                        GroupSelectAsOrdered ordered =
                                            GroupSelectAsOrdered::AUTO,
                                        const char *use_name_attr=nullptr,
                                        const char *select_script=nullptr);

    static PRM_SpareData        *getGroupSelectButton(
                                        GA_GroupMaskType group_mask,
                                        const char *group_type_parm = NULL,
                                        int input_index = 0,
                                        PRM_SpareData *merge_spare_data = NULL,
                                        const char *assoc_groups = NULL,
                                        GroupSelectAsOrdered ordered =
                                            GroupSelectAsOrdered::AUTO,
                                        const char *use_name_attr=nullptr,
                                        const char *select_script=nullptr);

protected:
    /// Open a tree chooser populated by the values from the @c path_attrib
    /// string values so the user can select primitives.  The @c stringparm
    /// parameter is evaluated to choose the selected primitives, and the
    /// result is written back to the @c stringparm when the user makes their
    /// selection.  If the @c path_attrib doesn't exist, then optionally,
    /// packed primitive intrinsic names can be used to populate the tree.
    void        pickPrimitivesUsingPathAttribute(
                    const GU_Detail &gdp,
                    const GA_Range &srcrange,
                    const char *stringparm,
                    fpreal t,
                    const char *path_attrib="path",
                    bool use_packed_names=true);
    /// Pick assuming that the range is a full range of primitives.  This
    /// method gets the primitive range from the specified @c input_number.
    void        pickPrimitivesUsingPathAttribute(
                    const char *stringparm,
                    fpreal t,
                    int input_number=0,
                    const char *path_attrib="path",
                    bool use_packed_names=true);
    /// Create a GA_Range containing the primitives specified by the values in
    /// the @c pickedstring.  The primitives are selected from the @c
    /// srcrange in the given @c gdp.
    static GA_Range     getPickedRangeUsingPathAttribute(
                            const GU_Detail &gdp,
                            const GA_Range &srcrange,
                            const char *pickedstring,
                            const char *path_attrib="path",
                            bool use_packed_names=true);

    /// WARNING:  The groups returned are const and should not be modified
    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo)
    int                          parseGroups(const char *pattern,
                                             GU_Detail *gdp,
                                             const GA_PrimitiveGroup *&prim,
                                             const GA_PointGroup *&points,
                                             bool strict = false);

    SYS_DEPRECATED_HDK_REPLACE(15.0,GroupCreator or other version of function and dont cast away const on input geo)
    int                          parseGroupsCopy(const char *pattern,
                                             GU_Detail *gdp,
                                             GA_PrimitiveGroup *&prim,
                                             GA_PointGroup *&points,
                                             GA_EdgeGroup *&edges,
                                             int unify,
                                             bool strict = false,
                                             GA_GroupType numeric_type
                                                        = GA_GROUP_PRIMITIVE);

public:
    /// Method to help fill in the menu entries representing attributes
    /// It will iterate though the attributes of the 'dictionary' supplied
    /// from the input 'input_index'. The 'approve' filter callback is applied 
    /// (if present) and if it returns ture for an attribute, this attribute
    /// is appended to the 'menu_entries'. If not present, all attributes
    /// are appended. The number of entries appended does not exceed
    /// 'max_menu_size' (including the terminating sentinel). 'menu_entries' are
    /// sorted alphabetically and the function returns the number of entries
    /// appended (excluding the terminating sentinel).
    /// If decode_tokens is true, the tokens will contain the decoded name of
    /// any encoded attribute names (see UT_VarEncode::encodeAttrib). This can
    /// be used for parameters that support matching against decoded names
    /// rather than the actual attribute names.
    int                  fillAttribNameMenu(PRM_Name *menu_entries,
                                int max_menu_size,
                                GA_AttributeOwner dictionary,
                                int input_index,
                                bool (*approve)(const GA_Attribute*,void*)=NULL,
                                void *approve_data = NULL,
                                bool decode_tokens = false);

    /// utility method for pruning the duplicate entries in a sorted menu
    static void          removeMenuDuplicates(PRM_Name *menuEntries, int size);

    /// Obtains pointers to the vertex, point, and primitive vector attributes.
    /// Only vector attributes are considered.
    /// NB: it needs access to the gdp, so use it only in the cook methods
    void                 getVectorAttribs( const char * attrib_names,
                                UT_Array<GA_Attribute *> &vertex_attribs,
                                UT_Array<GA_Attribute *> &point_attribs,
                                UT_Array<GA_Attribute *> &prim_attribs);
    static void          getVectorAttribs( GU_Detail *gdp,
                                const char * attrib_names,
                                UT_Array<GA_Attribute *> &vertex_attribs,
                                UT_Array<GA_Attribute *> &point_attribs,
                                UT_Array<GA_Attribute *> &prim_attribs);

    /// parses the vector attrib parameter and fills attribs array
    static void          getVectorAttribs(const GA_AttributeDict &dict,
                                const char * attrib_string,
                                UT_Array<GA_Attribute *> &attribs,
                                UT_String &bad_attribs);

protected:

    /// Drag-n-drop receiver functions

    int                  acceptDragDrop(DD_Source &src, 
                                        const char *l) override;
    int                  testDragDrop(DD_Source &src) override;
    void                 getDragDropChoice(DD_Source &src,
                                           DD_ChoiceList &choices) override;

    typedef void (SOP_Node::*GroupOperation)(const GA_Group *, void *);

    /// Perform an operation on each group matching the specified mask.
    int forEachGroupMatchingMask(
        const char *pattern,
        GroupOperation operation,
        void *data,
        GA_GroupType grpType,
        const GEO_Detail *pgdp=nullptr,
        bool maintainorder=false);
public:
    static int invokeForEachGroupMatchingMask(
        const GU_Detail *gdp,
        const char *pattern,
        GA_GroupType grpType,
        const UT_Function<void(const GA_Group *)> &operation,
        bool maintainorder);
protected:

    /// Take an optional group and subdivide it into smaller groups as
    /// input to operation

public:
    static void invokeForSubdivisionOfPrimitiveGroup(
                const UT_Function<void(const GA_Group *)> &operation,
                const GA_PrimitiveGroup *group, 
                int optype, 
                int opstep, const char *oplabel,
                const GU_Detail *gdp);

protected:
    void                        subdividePrimitiveGroup(
                                        GroupOperation operation,
                                        const GA_PrimitiveGroup *group, 
                                        void *data, int optype, 
                                        int opstep, const char *oplabel,
                                        const GU_Detail *gdp=0);
    void                        subdivideMixPrimitiveGroup(
                                        GroupOperation operation,
                                        const GA_PrimitiveGroup *group, 
                                        void *data, int optype, 
                                        int opstep, const char *oplabel,
                                        GU_Detail *gdp=0);
    void                        subdividePointGroup(
                                        GroupOperation operation,
                                        const GA_PointGroup *group, 
                                        void *data, int optype, 
                                        int opstep, const char *oplabel,
                                        GU_Detail *gdp=0);


    /// Create an adhoc (internal) group and add it to the list of adhoc groups.
    /// The group will be deleted for you after cooking.
    GA_PrimitiveGroup   *createAdhocPrimGroup (GU_Detail &geo,
                                               const char *p="adhoc")
                         { return myGroupParse.createPrimitiveGroup(geo, p); }
    GA_PointGroup       *createAdhocPointGroup(GU_Detail &geo,
                                               const char *p="adhoc")
                         { return myGroupParse.createPointGroup(geo, p); }
    GA_EdgeGroup        *createAdhocEdgeGroup (GU_Detail &geo,
                                               const char *p="adhoc")
                         { return myGroupParse.createEdgeGroup(geo, p); }
    GA_VertexGroup      *createAdhocVertexGroup (GU_Detail &geo,
                                                 const char *p="adhoc")
                         { return myGroupParse.createVertexGroup(geo, p); }
    GA_PrimitiveGroup   *createAdhocPrimGroup(const GEO_Detail &geo)
    {
        return myGroupParse.appendAdhocGroup(
                                geo.createDetachedPrimitiveGroup());
    }
    GA_PointGroup       *createAdhocPointGroup(const GEO_Detail &geo)
    {
        return myGroupParse.appendAdhocGroup(geo.createDetachedPointGroup());
    }
    GA_EdgeGroup        *createAdhocEdgeGroup(const GEO_Detail &geo)
    {
        return myGroupParse.appendAdhocGroup(geo.createDetachedEdgeGroup());
    }
    GA_VertexGroup      *createAdhocVertexGroup(const GEO_Detail &geo)
    {
        return myGroupParse.appendAdhocGroup(geo.createDetachedVertexGroup());
    }
    GA_BreakpointGroup  *createAdhocBreakpointGroup (const GEO_Detail &geo)
    {
        return myGroupParse.createBreakpointGroup(geo);
    }

    /// This is only called when the instance flag is set.  
    /// The gdp will be modified shortly after this function is called.  After
    /// the return, the gdp member data should contain an empty (or full)
    /// GU_Detail.  Setting the duplicate flag will duplicate the current gdp
    /// in the new one.
    /// This used to require one to derive from it to clear references
    ///  to myInstanceOp.  This is now handled at this level.
    void                 clearInstance(int duplicate = 0);
    /// True if another SOP has an instance of our geometry.
    bool                 hasInstances();
    /// Counts the number SOPs that are descended instances of our geometry.
    int                  countInstances();
    /// Clears SOPs with descended instances of our geometry.
    void                 clearAllInstances();

    /// In between cooks, the gdp pointer might be reset by the cooking engine
    /// (eg. if its gdp was instanced by some other SOP). If this function
    /// returns true, then it will be reset to an empty gdp. If this function
    /// returns false, then the contents of the old gdp will be duplicated into
    /// the new gdp. SOPs performing simulation which rely on the cooked
    /// contents of its gdp from the last frame should override this to return
    /// false.
    virtual bool         shouldResetGeoToEmpty() const  { return true; }

    /// The duplicate*Source methods take a context parameter but do not
    /// use it for anything.
    /// The specified input must already be locked.  The context used to
    /// lock the input is the context used for duplication.
    OP_ERROR             duplicateSource(unsigned index, OP_Context &context,
                                         GU_Detail *gdp, bool clean=true);
    OP_ERROR             duplicateSource(unsigned index, OP_Context &context)
    {
        return duplicateSource(index, context, gdp, true);
    }

    /// Only duplicates the source if the source has changed. Otherwise,
    /// it copies the points from the source to our gdp. It's meant to be
    /// used by most deformer SOPs, which simply transform the points and
    /// or the primitives. If wattrib is true, we check if any transforming
    /// primitive or vertex attributes are present and if any point attribs
    /// exist, and copy those too.
    ///
    /// NOTE: Do not use this if you are creating or destroying point
    /// attributes.
    ///
    /// NOTE: While this takes a gdp to operate on, if it is not the SOP's
    /// own gdp, it will just do a duplicateSource.
    OP_ERROR             duplicatePointSource(unsigned index, OP_Context &ctx,
                                         GU_Detail *gdp, bool clean = true,
                                         bool wattrib = true,
                                         bool *fully = 0);
    OP_ERROR             duplicatePointSource(unsigned index, OP_Context &ctx)
                         {
                             return duplicatePointSource(index, ctx, gdp, 1,
                                                         true, 0);
                         }

    /// This copies all the point positions from the given input gdp into
    /// the current one.
    /// @pre input_i has already been locked via lockInput
    bool                 copyPointPosFromSource(
                            unsigned input_i, OP_Context &ctx);

    /// @brief Only duplicates the source if the source has changed since the
    /// last call to this method.
    OP_ERROR             duplicateChangedSource(unsigned idx, OP_Context &ctx,
                                        int *changed = 0, bool force=false);

    /// Only duplicates primitives in primgroup from src_gdp to dest_gdp
    OP_ERROR             duplicateSourceGroup(const GU_Detail *src_gdp,
                                          const GA_PrimitiveGroup *primgroup,
                                          GU_Detail *dest_gdp=0);
    
    /// Forces duplicateChangedSource() to do the duplication on its next call.
    /// Can specify an input index (-1 to reset all)
    void                 resetChangedSourceFlags();
    void                 resetChangedSourceFlags(int which_input);

    /// @brief Checks if a duplication will occur on the next call to
    /// duplicateChangedSource().
    ///
    /// Similar to useInputSource() except it doesn't affect the flags. It's
    /// used to simply query whether the given input has changed. Returns false
    /// if there's errors on the input. Upon return, @c changed is updated.
    OP_ERROR             checkChangedSourceFlags(unsigned idx, OP_Context &ctx,
                                        int *changed);

    /// @brief Mark the given input as used for cooking by this node.
    ///
    /// This updates source flags to mark the input as now clean, returning
    /// whether the input has changed since the last time this function was
    /// called. If force is true, then we treat the input as always dirty.
    /// Returns false if the input has errors.
    /// @note duplicateChangedSource() calls this function.
    bool                 useInputSource(unsigned idx, bool &changed, bool force)
                         {
                             return myInputChangeHelper.useInput(
                                                *this, idx, changed, force);
                         }

    void                 deleteCookedData() override;
    int                  deleteNodeData(void *) override;

    /// Methods for dealing with group centroid
    void                 convertPivotAboutGroupCentroid(
                                    PRM_Parm &grppivot_parm,
                                    int pivot_parm_idx,
                                    const UT_Vector3 *centroid = 0);
    void                 convertPivotAboutGroupCentroid(
                                    PRM_Parm &grppivot_parm,
                                    const char *pivot_parm_name,
                                    const UT_Vector3 *centroid = 0);
    
    
    /// subclasses override this to return the group centroid if they support
    /// it.
    virtual bool         getGroupCentroid(OP_Context & /*context*/,
                                          UT_Vector3 & /*centroid*/)
                                    { return false; }

    //
    //  I/O methods
    //
    OP_ERROR             save(std::ostream &os,
                              const OP_SaveFlags &flags,
                              const char *pathPrefix,
                              const UT_String &name_override = UT_String()
                              ) override;
    bool                 load(UT_IStream &is,
                              const char *extension,
                              const char *path=0) override;

    void                 refreshGdp();


    //
    // Data for the SOP class
    //

    /// The gdp handle provides a indirect reference to the current
    /// gdp of this SOP.
    GU_DetailHandle      myGdpHandle;

    /// During cooks, myGdpHandle is writelocked and stored in the
    /// gdp variable.  This is to provide backwards compatibility.
    /// The gdp variable should not be trusted or accessed elsewhere.
    GU_Detail           *gdp;
    SOP_Guide           *myGuide1;      // primary guide geometry
    SOP_Guide           *myGuide2;      // secondary guide geometry
    SOP_NodeFlags        mySopFlags;

private:
    //
    //  These virtuals are methods that nobody should override...
    //
    //  I/O methods
    //
    OP_ERROR             saveIntrinsic(std::ostream &os, 
                                       const OP_SaveFlags &flags) override;

    bool                 loadPacket(UT_IStream &is, 
                                    short class_id, short sig,
                                    const char *path=0) override;
    bool                 loadPacket(UT_IStream &is, const char *token,
                                    const char *path=0) override;

    void                 clearAndDestroy() override;

    int                  saveCookedData(const char *, 
                                        OP_Context &) override;
    int                  saveCookedData(std::ostream &os, 
                                        OP_Context &, 
                                        int binary = 0) override;
    bool                 loadCookedData(UT_IStream &is, 
                                        const char *path=0) override;

    /// loadHardCookedData is just like loadCookedData, except it doesn't
    /// check if this SOP is softlocked.  Use it only if you know you are
    /// loading hardlocked data (as in SOP_UndoModel)
            bool         loadHardCookedData(UT_IStream &is, const char *path=0);

    const char          *getFileExtension(int binary) const override;

    bool                 softLockable(const GU_Detail &unmodelled_gdp,
                                      const GU_Detail &modelled_gdp) const;
    /// take a snapshot of the current gdp and stores the soft lock data.
    /// copies the previous slock data to the given reference (so caller
    /// can use it for undo)
    /// returns true on success, false otherwise
    bool                 storeSoftLockData(OP_Context &context,
                                           SOP_SoftLockData *old_slockdata=0);

    sopVisualizeCallback *myVisualizeCallback;
    void                 *myVisualizeCallbackData;
    
public:

    // compact the weight data of an index pair attribute
    static void compactIndexPair(GA_Attribute *attrib);

public:
    /// Do not use this function! Using it will likely cause crashes.
    virtual void         unloadDataHack();

    /// Unload data for this node, called by unload flag heuristics, etc.
    /// @note Does not clear verb data by default. To ensure that is
    ///       also cleared, call clearVerbCache().
    bool                 unloadData() override;

    /// Clears the node verb cache and parms
    void                 clearVerbCache();

    /// Returns the amount of memory owned by this node, *NOT* including
    /// any cooked geometry.
    int64                getMemoryUsage(bool inclusive) const override;

    /// Returns the amount of memory used by this SOP, that will
    /// be unloaded by an unload call.  Baseclass defaults to
    /// returning the GDP's data.
    virtual int64        getLoadedMemoryUsage() const;

    /// Returns whether this node currently has cooked data or not.
    bool                 isLoaded() const override;

    /// Returns if the sop cache manager will allow unloading.
    bool                 shouldUnload() const;

    /// Convenience method to prepare newly allocated GU_Detail objects to
    /// act as the output.
    /// Note that this returns the passed in gdp pointer.
    static GU_Detail            *prepNewDetail(GU_Detail *gdp);

    /// This method is automatically called at the conclusion of cooking to
    /// notify the gdp that it's data has changed.  By default, this will call:
    /// @code
    ///   if (bumpalldataid)
    ///       gdp->bumpAllDataIds();
    ///   gdp->defragment();
    ///   gdp->edgeGroups().makeAllEdgesValid();
    ///   gdp->incrementMetaCacheCount();
    /// @endcode
    static void         markDetailDirty(GU_Detail *dirtygdp,
                                        bool bumpalldataid);

    /// All SOP nodes can be a selection owner.
    /// This replaces the previous inheritance from SOP_SelectionOwner.
    bool                isSelectionOwnerType() const override final
                            { return true; }


private:
    OP_InputChangeHelper myInputChangeHelper;

    /// We store all locked inputs in this list.  We can then allow
    /// the same source node to be cooked with different contexts
    /// and let copy on write semantics avoid problems.
    /// Any non-null handle here has PreserveRequest set and should
    /// have it removed before removing.
    UT_ValArray<GU_DetailHandle *>      myInputGeoHandles;

    GOP_Manager          myGroupParse;
    
    friend class         SOP_UndoModel; // needs access to gdp
    friend class         SOP_CacheManager; // needs access to handle.
    friend class         SOP_CacheData; // needs access to handle.
    friend class         sop_AttributeEvaluator; // needs access to local var info

    //
    // Private data
    //
    SOP_SoftLockData    *mySoftLockData;

    bool                 myHasCookedSelection;

    /// the capture override flag is used to indicate wheter the SOPs should
    /// use their capture parameters or cook capture geometry. (e.g., 
    /// SOP_CaptureRegion). This flag is mirrored from OBJ_Bone, which
    /// allows to view bones and capture region in their capture configuration
    static  bool         theGlobalCaptOverride;

    UT_Lock              myInstancingOpsLock;
    UT_Set<int>          myInstancingOps;
    int                  myInstanceOp;          // Which op we are instancing.

public:
    // This method needs to be public so HOM can flag an expression as needing
    // corresponding to local variables.
    void                         setUsesSOPLocalVar()
                                 { myUsesSOPLocalVar = true; }

    UT_AttributeEvaluator   *createAttributeEvaluator(
                                    const char *name) override;
    void                     getAttributeEvaluatorNames(
                                    UT_StringArray &names) override;

    // CHOP Transform Tracks
    bool hasTransformTracks() const override;
    bool evaluateTransformTracks( OP_Context &context,
                    OP_EvaluateTransformTracksArgs &args ) override;
    bool evaluateTransformTracksTargets( OP_Context &context,
                    OP_NodeList &nodes, OP_Node *caller) override;

protected:
    /// Local variable items:
    UT_SymbolMap<sopVarInfo *>   myLocalVarTable;
    UT_ValArray<sopVarInfo *>    myLocalVarArray;
    int                          myLocalVarOrder;
    
    /// Tracks if any expression has triggered a local variable,
    /// like $PT, etc.  If this is false, it is safe to only
    /// evaluate the parm once for all subtypes.
    /// The higher level code is expected to clear this flag, evaluate their
    /// relevant parms, and then test this flag.
    bool                         myUsesSOPLocalVar;
private:
    // myFlagUnused used to be myLocalVarActive, which has been moved down to
    // OP_Node. It's still here to avoid breaking HDK binary compatibility.
    bool                         myFlagUnused;
    const GU_Detail             *myCurGdp[2];
    GU_DetailHandle              myCurGdh[2];

    /// This is the selection set we use when the footprint flag is on.
    GU_SelectionSetHandle        myFootprintSelectionSet;
    
    /// This is a complete override for all selection sets. Used temporarily
    /// by selectors.
    GU_SelectionSetHandle        mySelectionSetOverride;
    
protected:
    GA_Offset                    myCurVtxOff[2];
    int                          myCurVtxNum[2];
    GA_Offset                    myCurPtOff[2];
    GA_Offset                    myCurPrimOff[2];
    int                          myCurBuiltPtBox[2];
    UT_BoundingBox               myCurPtBox[2];
    int                          myCurBuiltPrimBox[2];
    UT_BoundingBox               myCurPrimBox[2];

    int                          myCurGdpVal;   // Which gdp is being traversed

    /// Cached values so we can tell if we have to rebuild.
    int                          myLocalVarOrderCache;
    int                          myCurrentLayerCache;
    /// This is all the old attribute information, one for each of the
    /// dictionary types...  If this (including the order) matches the
    /// new attribute data, no offsets will have changed.
    UT_Array<sop_attribRef>      myAttribCache[2][4];
    UT_String                    myVarMapCache[2];
    int                          myAttribCacheOffsetGdpId[2];
    int                          myAttribCacheOffsetMetaCacheCount[2];
    unsigned int                 myAttribCacheTotalDictSize[2];
    /// Stores the @ cache lookups generated JIT.
    UT_StringMap<sop_AttributeEvaluator *>      myAttributeEvaluatorCache;

    /// Stores the parms & cache for old-style node cooking of verb
    /// based nodes.
    SOP_NodeCache               *myNodeVerbCache;
    SOP_NodeParms               *myNodeVerbParms;
    friend class SOP_NodeVerb;
    friend class SOP_NodeParms;
    friend class sop_NodeInputs;
};

/// Function to get a list of template arrays containing parm names that must
/// be reserved when compiling VEX SOPs.
SOP_API extern void
SOPgetVexReservedTemplateLists(UT_ValArray<PRM_Template *> &tplatelists);

#endif