GU/GU_PrimSphere.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_PrimSphere.h (C++)
 *
 * COMMENTS:
 *      Header file for GU_PrimSphere.h class...
 * 
 */

#ifndef __GU_PrimSphere_h__
#define __GU_PrimSphere_h__

#include "GU_API.h"
#include <UT/UT_Matrix4.h>
#include <GEO/GEO_PrimSphere.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_PrimSphere                              //
// 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_PrimSphereParms {
public:
    GU_PrimSphereParms();

    GU_Detail           *gdp;
    GEO_Point           *ppt;           // use this point instead of yours
    UT_Matrix4           xform;
    int                  freq;          // For polygons
    int                  rows, cols;            // For mesh
    int                  uniquePole;    // For mesh&others
    int                  orderu;        // for surfaces
    int                  orderv;
    int                  imperfect;     // nonrational
    GEO_SurfaceType      type;          // For hull types
};


class GU_API GU_PrimSphere : public GEO_PrimSphere, public GU_Primitive
{
public:
    // This constructor creates a new GU_PrimSphere but does
    // not append it to the detail
    GU_PrimSphere(GU_Detail *gdp) : GEO_PrimSphere(gdp), GU_Primitive() {}

    // Class destructor.
    ~GU_PrimSphere();
    
    virtual void                *castTo() const;
    virtual const GEO_Primitive *castToGeo(void) const;

    virtual GU_DisplayMesh      *getDisplayMesh(int noff, float lod);

    // 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;


    // NOTE:  For static member functions please call in the following
    //        manner.  <ptrvalue> = GU_PrimSphere::<functname>
    //        i.e.      sphereptr = GU_PrimSphere::sphereBuild(params...);

    // Optional Build Method 

    static GEO_Primitive        *build(const GU_PrimSphereParms &parms,
                                        unsigned type = GEOPRIMSPHERE);

    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;
    // Persistent is true if the returned cache is not to be deleted by
    // the caller.
    virtual GU_RayIntersect     *createRayCache(int &persistent);

private:

    // The following will create a sphere primitive
    void                create(const UT_Matrix4 &mat, GEO_Point *ppt = 0);

    // Pass center attributes to converted geometry:
    void                passAttributesToPolys(GU_PrimPoly *dest,
                                              int preserve_groups) const;
    void                passAttributesToMesh(GEO_Primitive &dest,
                                             int preserve_groups) const;
};

#endif

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