GEO_PrimMetaBall.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:        Geometry Library (C++)
 *
 * COMMENTS:
 *
 */

#ifndef __GEO_PrimMetaBall_H__
#define __GEO_PrimMetaBall_H__

#include "GEO_API.h"
#include <UT/UT_Vector3.h>
#include "GEO_MetaPrim.h"
#include "GEO_PrimSphere.h"

class TS_MetaEllipsoid;
class UT_MemoryCounter;

class GEO_API GEO_PrimMetaBall : public GEO_PrimSphere, public GEO_MetaPrim
{
protected:
    /// NOTE: The constructor should only be called from subclass
    ///       constructors.
    GEO_PrimMetaBall(GEO_Detail *d, GA_Offset offset = GA_INVALID_OFFSET)
        : GEO_PrimSphere(d, offset)
    {}

    /// NOTE: The destructor should only be called from subclass
    ///       destructors.
    ~GEO_PrimMetaBall() override {}

public:
    void                         copyPrimitive(
                                        const GEO_Primitive *src) override;
    bool                         isDegenerate() const override;
    GEO_Primitive               *copy(int preserve_shared_pts=0) const override;
    void                         copySubclassData(
                                        const GA_Primitive *source) override;

//
//  Methods to handle meta interface
    void                         fillTSPrim(TS_MetaEllipsoid &tsprim) const;

    // A function that allocates a new TS_MetaEllipsoid and returns it.
    // Used in the metaExpression parser to handle multiple instances
    // of a metaball being used in the same expression
    TS_MetaPrimitive            *getNewMetaPrim() const override;

    float                        density(const UT_Vector3 &pos) const override;
    void                         getBBox(UT_BoundingBox &bbox) const override;

    bool                         getBBox(UT_BoundingBox *bbox) const override
    { return GEO_PrimSphere::getBBox(bbox); }

    GEO_MetaPrim                *castToMetaPrim() override;
    const GEO_MetaPrim          *castToMetaPrim() const override;

    const GA_PrimitiveJSON      *getJSON() const override;

protected:
    /// We explicitly do not include the mask from the GEO_PrimSphere base.
    static GA_PrimitiveFamilyMask       buildFamilyMask()
                                            { return GEO_FAMILY_META; }

    // Declare intrinsic attributes
    GA_DECLARE_INTRINSICS(override);

    bool                         savePrivateH9(std::ostream &os,
                                               bool binary) const override;
    bool                         loadPrivateH9(UT_IStream &is) override;
};
#endif