GB/GB_Edge.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:
 *      George ElKoura
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        Base class for an edge (C++)
 *
 * COMMENTS:    
 *
 */
#ifndef __GB_Edge_h__
#define __GB_Edge_h__

#include "GB_API.h"
#include <UT/UT_LinkList.h>
#include "GB_Element.h"

class GB_Detail;
class UT_IStream;

class GB_API GB_Edge : public UT_LinkNode
{
public:


    GB_Edge(GB_Element *ppt0=0, GB_Element *ppt1=0, GB_Element *pprim=0);
    GB_Edge(const GB_Edge &e);
    
    virtual ~GB_Edge(void);

    GB_Edge             &operator=(const GB_Edge &e) 
                         { 
                            myP0=e.myP0; 
                            myP1=e.myP1;
                            myPrim=e.myPrim;
                            return *this; 
                         }
    unsigned             operator==(const GB_Edge &e);

    const GB_Element     *p0()   const  { return myP0; }
          GB_Element    *&p0()          { return myP0; }
    const GB_Element     *p1()   const  { return myP1; }
          GB_Element    *&p1()          { return myP1; }
    const GB_Element     *prim() const  { return myPrim; }
          GB_Element    *&prim()        { return myPrim; }


    // I/O methods, returning 0 if OK and -1 otherwise:
    int                  save(ostream &os, int binary) const;
    bool                 load(UT_IStream &is, const GB_Detail &gdp);

protected:

    // The two end-points
    GB_Element  *myP0;
    GB_Element  *myP1;

    // Optional primitive to which this edge belongs
    GB_Element  *myPrim;

private:
    friend class        GB_Detail;
};

#endif

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