GU/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.
 *
 * Produced by:
 *      Mark Elendt
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * 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"
class GU_Detail;
class GU_TopologyAttrib;
class GU_TopologyGroup;
class GB_AttributeDict;

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;
};

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;
    int                  myPrims;
    int                  myPoints;
    int                 *myVertices;
    GU_TopologyAttrib   *myPtAttribs;
    GU_TopologyAttrib   *myPrimAttribs;
    GU_TopologyAttrib   *myVtxAttribs;
    GU_TopologyAttrib   *myDetailAttribs;
    int                  myPtAttribCount;
    int                  myPrimAttribCount;
    int                  myVtxAttribCount;
    int                  myDetailAttribCount;
    GU_TopologyGroup    *myPtGroups;
    GU_TopologyGroup    *myPrimGroups;
    int                  myPtGroupCount;
    int                  myPrimGroupCount;
};

#endif

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