GU/GU_PrimMetaSQuad.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:
 *      Dale Ducharme
 *      Side Effects Software Inc.
 *      20 Maud St.
 *      Toronto, Ontario,  M5V 2M5
 *      Canada
 *      416-366-4607
 *
 * NAME:        GU_PrimMetaSQuad.h (C++)
 *
 * COMMENTS:
 *      Header file for GU_PrimMetaSQuad.h class...
 * 
 */

#ifndef __GU_PrimMetaSQuad_h__
#define __GU_PrimMetaSQuad_h__

#include "GU_API.h"
#include <GEO/GEO_PrimMetaSQuad.h>
#include "GU_Detail.h"
#include "GU_Prim.h"

class GEO_Hull;
class GU_PrimPoly;
class GU_PrimMesh;
class GU_PrimNURBSurf;
class GU_PrimRBezSurf;

/////////////////////////////////////////////////////////////
//                                                         //
// Class:       GU_PrimMetaSQuad                           //
// 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_PrimMetaSQuadParms
{
public:
    GU_PrimMetaSQuadParms();

    GU_Detail           *gdp;
    GEO_Point           *ppt;
    UT_Matrix4           xform;
    float                weight;
    float                xyExp;
    float                zExp;
};

class GU_API GU_PrimMetaSQuad : public GEO_PrimMetaSQuad, public GU_Primitive
{
public:
    // This constructor creates a new GU_PrimMetaSQuad but does
    // not append it to the detail
    GU_PrimMetaSQuad(GU_Detail *gdp) : GEO_PrimMetaSQuad(gdp), GU_Primitive()
    {
        gdp->incrementCacheables();
    }

    // Class destructor.
    virtual ~GU_PrimMetaSQuad();

    
    // Conversion Methods 
    GEO_Primitive      *convert(GU_ConvertParms &parms, 
                                GB_PointGroup *usedpts = 0);

    GEO_Primitive      *convertNew(GU_ConvertParms &parms);

    virtual void        normal(int noff) const;
    virtual void        normal(UT_Vector3Array &output) const;

    void               *castTo() const;

    // Optional Build Method 
    static GU_PrimMetaSQuad     *build(const GU_PrimMetaSQuadParms &parms,
                                       const char *kernel="wyvill");

    virtual 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;

    // Methods to handle display caching.
    virtual void         notifyCache(int type);
    virtual void         notifyCache(int type, const GEO_Point &ppt);
    virtual void         notifyCache(int type, const GB_PointGroup &grp);
    virtual void         notifyCache(int type, const UT_Matrix4 &xform, 
                                     int push);
    virtual void         notifyCache(int type, const UT_Vector3 &delta);
    // Persistent is true if the returned cache is not to be deleted by
    // the caller.
    virtual GU_RayIntersect     *createRayCache(int &persistent);

    virtual const GEO_Primitive *castToGeo(void) const;

private:
    void                create(const UT_Matrix4 &xform,
                                float weight, float xyExp, float zExp,
                                const char *kernel = "wyvill",
                                GEO_Point *ppt = 0);
};

#endif

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