GU_Topology.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        GU_Topology.h ( GU Library, C++)
 *
 * COMMENTS:    Topology checker - builds a structure with which you can
 *              determine different degrees of topology changes (this is
 *              done when you set up the checker)
 */

#ifndef __GU_Topology__
#define __GU_Topology__

#include "GU_API.h"

#include <UT/UT_ValArray.h>
#include <GA/GA_Types.h>

class GU_Detail;
class gu_TopologyAttrib;
class gu_TopologyGroup;

class GU_API GU_TopologyFlags
{
public:
    GU_TopologyFlags() {
        myPrimCount = 1;                // We're interested in # primitives
        myPointCount = 1;               // Interested in # points
        myVertexCount = 0;              // Not in # vertices per prim
        myGroups = 1;                   // Interested if groups change
        myAttributes = 1;               // Interested in attribute changes
    };

    unsigned    myPrimCount:1,
                myPointCount:1,
                myVertexCount:1,
                myGroups:1,
                myAttributes:1;
};

/// WARNING: The behaviour of this class is highly suspect!
///          Please, do not use it in new code!
class GU_API GU_Topology
{
public:
     GU_Topology();
    ~GU_Topology();

    void                setFlags(const GU_TopologyFlags &flags);
    void                initialize(const GU_Detail *gdp);
    int                 isDifferent(const GU_Detail *gdp) const;

private:
    void                 clearAndDestroy();
    void                 clearAttributes();
    void                 clearGroups();

    GU_TopologyFlags                    myFlags;
    GA_Size                             myPrims;
    GA_Size                             myPoints;
    GA_Size                             myVertices;
    UT_ValArray<gu_TopologyAttrib *>    myPtAttribs;
    UT_ValArray<gu_TopologyAttrib *>    myPrimAttribs;
    UT_ValArray<gu_TopologyAttrib *>    myVtxAttribs;
    UT_ValArray<gu_TopologyAttrib *>    myDetailAttribs;
    UT_ValArray<gu_TopologyGroup *>     myPtGroups;
    UT_ValArray<gu_TopologyGroup *>     myPrimGroups;
    UT_ValArray<gu_TopologyGroup *>     myVtxGroups;
};

#endif