GDT_Transform.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:        GDT Library.  (Geo Delta)
 *
 * COMMENTS:    A GDT_Transform contains a list of matrices that describe
 *              the changes to the gdp's primitive transforms.
 *
 */
#ifndef __GDT_Transform_h__
#define __GDT_Transform_h__

#include "GDT_API.h"
#include <UT/UT_BitArray.h>
#include <UT/UT_ValArray.h>
#include <UT/UT_Matrix3.h>

#include "GDT_Token.h"

class GA_PrimitiveGroup;
class GDT_TokenList;

class GDT_API GDT_Transform : public GDT_Token
{
public:
    GDT_Transform(unsigned int size) : myUsedEntries(size) {}
    GDT_Transform(const GDT_Transform &other);

    ~GDT_Transform() override;

    int64                       getMemoryUsage(
                                        bool inclusive = false) const override;

    void                        applyDeltas(const GDT_TokenList &list,
                                            GEO_Detail &gdp,
                                            const GA_AIFEditDeltaMap &map,
                                            bool inverse=false) const override;

    void                        mergeTransformDeltas(
                                            const GDT_Transform &other,
                                            bool inverse = false);

    // Reset elements with deltas to the values from the source detail.
    void                        resetElementsFromSource(GEO_Detail &gdp,
                                    const GA_AIFEditDeltaMap &map,
                                    const GEO_Detail &src_gdp,
                                    const GA_AIFEditDeltaMap &src_map) const;

    // Apply stored deltas for elements also recordered in other to the
    // given gdp.
    void                 applyIntersectionDeltas(
                                    const GDT_TokenList &token_list,
                                    GEO_Detail &gdp,
                                    const GA_AIFEditDeltaMap &map,
                                    const GDT_Transform &other) const;

    // Zero all the deltas non-destructively
    virtual void                zeroDeltas();
    
    // Begin/end a change to a point position
    void                        beginPrimitiveTransformChange(
                                                    const UT_Matrix3 &mat);
    void                        endPrimitiveTransformChange(
                                                    const UT_Matrix3 &endmat,
                                                    unsigned int index);

    virtual void                resize(unsigned int size);

    virtual unsigned int        changed() const
                                { return myUsedEntries.numBitsSet(); }
    virtual unsigned int        entries() const 
                                { return myUsedEntries.size(); }

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

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

private:
    UT_Matrix3                   mySavedMat;

    UT_ValArray<UT_Matrix3 *>    myValues;
    UT_BitArray                  myUsedEntries;
};

#endif