GDT/GDT_Position.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 GDT_Position contains a full list of vectors that describe
 *              the changes to the gdp's point positions.
 *
 */
#ifndef __GDT_Position_h__
#define __GDT_Position_h__

#include "GDT_API.h"
#include <UT/UT_BitArray.h>
#include <UT/UT_Vector4Array.h>

#include "GDT_Token.h"

#include "GDT_CoordinateFrames.h"
#include "GDT_SymmetryTransform.h"

class GA_PointGroup;
class GA_AIFEditDelta;
class GA_AIFEditSnapshot;
class GDT_TokenList;
class GEO_Point;

class GDT_API GDT_Position : public GDT_Token
{
public:
    GDT_Position() : myDelta(0), mySnapshot(0),
                                      myCoordinateFrames(0) {}
    GDT_Position(const GDT_Position &other);

    virtual ~GDT_Position() {}


    virtual void                applyDeltas(const GDT_TokenList &list,
                                            GEO_Detail &gdp,
                                            const GA_AIFEditDeltaMap &map,
                                            bool inverse=false) const;
    virtual void                applyScaledDelta(GEO_Detail &gdp, GEO_Point &pt,
                                            fpreal64 scale,
                                            const GA_AIFEditDeltaMap &map) const;
    virtual void                applyScaledDeltas(GEO_Detail &gdp,
                                            fpreal64 scale,
                                            const GA_PointGroup *ptgroup,
                                            const GA_AIFEditDeltaMap &map) const;

    void                        mergePositionDeltas(const GDT_Position &other,
                                                    bool inverse = false);

    // Zero all the deltas non-destructively
    virtual void                zeroDeltas();
    
    // Begin/end a change to a point position
    void                        beginPointPositionChange(const GA_Attribute *P,
                                                         GA_Offset element);
    void                        endPointPositionChange(
                                                const GA_AIFEditDeltaMap &map);

    virtual unsigned int        changed() const;

    // I/O Methods
    virtual bool                legacyLoad(UT_IStream &is,
                                           unsigned int numtotal);

    virtual bool                save(UT_JSONWriter &w,
                                     const GDT_JSON &json) const;
    virtual bool                load(UT_JSONParser &p,
                                     const GDT_JSON &json);

    void                        setCoordinateFrames(const GDT_CoordinateFrames *coords);

    void                        createSymmetryDeltas(const GDT_Position &input,
                                            GDT_SymmetryTransform *transform,
                                            const GA_AIFEditDeltaMap &map);

private:
    GA_AIFEditDelta             *myDelta;
    GA_AIFEditSnapshot          *mySnapshot;

    const GDT_CoordinateFrames  *myCoordinateFrames;
};

#endif

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