GDT/GDT_Token.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:        GDT Library. (Geo Delta)
 *
 * COMMENTS:    A Token describes changes to a gdp attribute or position,
 *              on points, primitives or vertices.
 *
 */
#ifndef __GDT_Token_h__
#define __GDT_Token_h__

#include "GDT_API.h"
#include <fstream.h>
#include <iostream.h>

class GEO_Detail;
class GDT_TokenList;
class UT_IStream;

// This is the base class for all tokens.
class GDT_API GDT_Token
{
public:
    GDT_Token() {}
    GDT_Token(const GDT_Token &) {}
    virtual ~GDT_Token() {}

    virtual void                 applyDeltas(const GDT_TokenList &list,
                                             GEO_Detail &gdp,
                                             bool inverse=false) const = 0;

    virtual unsigned int         entries() const  = 0;
    virtual void                 resize(unsigned int size) = 0; 

    virtual int                  save(ostream &os, int binary = 0) const = 0;
    virtual bool                 load(UT_IStream &is) = 0;
};

#endif

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