GU_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:        GU_PrimMetaBall.h (C++)
 *
 * COMMENTS:
 *      Header file for GU_PrimMetaBall.h class...
 * 
 */

#ifndef __GU_PrimMetaBall_h__
#define __GU_PrimMetaBall_h__

#include "GU_API.h"
#include <GEO/GEO_PrimMetaBall.h>
#include "GU_Detail.h"

class GEO_ConvertParms;
class GEO_Hull;
class GU_PrimPoly;
class GU_PrimMesh;
class GU_PrimNURBSurf;
class GU_PrimRBezSurf;
class UT_MemoryCounter;

/////////////////////////////////////////////////////////////
//                                                         //
// Class:       GU_PrimMetaBall                            //
// Descr:     This class is responsible for operations     //
//       done on sphere primitives.  As we need to access  //
//       the GU_Detail, the pointer is passed in the       //
//       constructor.  The second constructor creates a    //
//       sphere with the given parameters.                 //
//                                                         //
/////////////////////////////////////////////////////////////

class GU_API GU_PrimMetaBallParms
{
public:
    GU_PrimMetaBallParms(GU_Detail *gdp=NULL, GA_Offset ptoff=GA_INVALID_OFFSET,
                        fpreal weight=2);

    GU_Detail   *gdp;
    GA_Offset    ptoff; // use this point instead of yours
    UT_Matrix4   xform;
    float        weight;
};

class GU_API GU_PrimMetaBall : public GEO_PrimMetaBall
{
protected:
    /// NOTE: Primitives should not be deleted directly.  They are managed
    ///       by the GA_PrimitiveList and the stash.
    ~GU_PrimMetaBall() override
    {}

public:
    /// NOTE: This constructor should only be called via GU_PrimitiveFactory.
    GU_PrimMetaBall(GU_Detail *gdp, GA_Offset offset=GA_INVALID_OFFSET)
        : GEO_PrimMetaBall(gdp, offset)
    {}

    /// Report approximate memory usage.
    int64 getMemoryUsage() const override;

    /// Count memory usage using a UT_MemoryCounter in order to count
    /// shared memory correctly.
    /// NOTE: This should always include sizeof(*this).
    void countMemory(UT_MemoryCounter &counter) const override;

    const GA_PrimitiveDefinition &getTypeDef() const override
    {
        UT_ASSERT(theDefinition);
        return *theDefinition;
    }

    
    // Conversion Methods 
    GEO_Primitive               *convert(GEO_ConvertParms &parms,
                                         GA_PointGroup *usedpts = 0) override;
    GEO_Primitive               *convertNew(GEO_ConvertParms &parms) override;

    void                        normal(NormalComp &output) const override {}
    void                        normal(NormalCompD &output) const override {}

    // Optional Build Method 
    static GU_PrimMetaBall      *build(const GU_PrimMetaBallParms &parms,
                                       const char *type = "wyvill");

    // Other representations. The rotation vector must be specified in a
    // RIGHT-HANDED system.

    int                 intersectRay(const UT_Vector3 &o, const UT_Vector3 &d,
                                float tmax = 1E17F, float tol = 1E-12F,
                                float *distance = 0, UT_Vector3 *pos = 0,
                                UT_Vector3 *nml = 0, int accurate = 0,
                                float *u = 0, float *v = 0,
                                int ignoretrim = 1) const override;

private:
    static GA_PrimitiveDefinition       *theDefinition;
    friend class                         GU_PrimitiveFactory;

// Don't warn about overriding deprecated virtual methods
SYS_DEPRECATED_PUSH_DISABLE()
};
SYS_DEPRECATED_POP_DISABLE()

#endif