GU/GU_PrimRBezSurf.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_PrimRBezSurf.h (C++)
 *
 * COMMENTS:
 *      Header file for GU_PrimRBezSurf.h class...
 * 
 */

#ifndef __GU_PrimRBezSurf_h__
#define __GU_PrimRBezSurf_h__

#include "GU_API.h"
#include <GEO/GEO_PrimRBezSurf.h>
#include <GEO/GEO_PrimNURBSurf.h>
#include "GU_TPSurf.h"

class GB_EdgeGroup;
class GU_Detail;

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

class GU_API GU_PrimRBezSurf : public GEO_PrimRBezSurf, public GU_TPSurf
{
public:
    // This constructor creates a new GU_PrimRBezSurf but does
    // not append it to the detail
    GU_PrimRBezSurf(GU_Detail *gdp);

    virtual ~GU_PrimRBezSurf();

    virtual void                *castTo() const;
    virtual const GEO_Primitive *castToGeo(void) const;

    // Fill the surface with data and build the bases. Return 0 if OK, and -1
    // if error.
    int                 create(int rows, int cols, int orderu=4, int orderv=4,
                            int wrapu = 0, int wrapv = 0,
                            GEO_SurfaceType type = GEO_PATCH_QUADS,
                            int appendPoints = 1);

    // Conversion Method 
    // uses 'this' for surfacetype, primattribs, orderu and orderv.
    GEO_PrimNURBSurf    *convertToNURBNew(void);

    // This only works with unit patches.  And only well for order 4 
    // and less.
    GEO_Primitive       *convertToTriBezNew(GU_ConvertParms &parms);

    GEO_Primitive       *convertNew(GU_ConvertParms &parms);

     // This is more powerful than convertNew. It always returns a NEW
     // object, so free it when you're done with it. It may return
     // a NURB surface or a Bezier surface depending on the type.
     virtual GEO_Hull   *reconfigure(unsigned type, int orderu, int orderv,
                                     int openu, int openv, int, int) const;

    // Another notification method. This one's intended to be heard by the
    // geometry cache.
    virtual void         changedVertices(void);

    // Cut a wedge of the primitive given a domain range
    // ind1 and ind2 are indices to the refined values
    // They are updated if negative on input, else used as is.
    // If keep is zero the curve is only refined and the indices
    // updated.

    virtual GU_TPSurf   *cutU(float u1, float u2, 
                              int &ind1, int &ind2, int keep);
    virtual GU_TPSurf   *cutV(float v1, float v2, 
                              int &ind1, int &ind2, int keep);

    // Open the primitive at the given domain value
    virtual void         openAtU(float u);
    virtual void         openAtV(float v);

    // Divide a surface into its components patches.  Do not
    // modify 'this'.
    //  every_patch     - Split even if this is already a minimal patch
    //  appendPoints    - Add new points for split patches
    //  outprims        - Group to add created primitives to
    // Return:  npatches added or -1 on error
    int                  split(int every_patch = 0,
                                int append_points = 0, 
                                GB_PrimitiveGroup *out_prims = 0);
                        
    // Construct a curve that has our characteristics in u or v. The
    // CVs of the new curve are not set.
    virtual GEO_Curve   *buildRowCurve(int appendPoints = 1,
                                       GU_Detail *parent = 0) const;
    virtual GEO_Curve   *buildColCurve(int appendPoints = 1,
                                       GU_Detail *parent = 0) const;

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

    // Optional Build Method. Returns 0 if it fails. 

     static GU_PrimRBezSurf     *build( GU_Detail *gudp, 
                                       int rows, int cols, 
                                       int orderu = 4, int orderv = 4,
                                       int wrapu = 0, int wrapv = 0,
                                       GEO_SurfaceType type = GEO_PATCH_QUADS,
                                       int appendPoints = 1);

        // Remove as many of the given edges of possible from this poly.
        // If edge #a is removed, bit a in the bit array is set to a & 1.
        // returns 0 if successful, -1 if the poly becomes degenerate, and
        // -2 if the poly should be removed.
        int                      removeEdges(const GB_EdgeGroup &edges,
                                             UT_BitArray *remove_edges=0);


protected:
    virtual GEO_Hull    *getSubHull(int top, int left, int bottom, int right,
                                        GEO_SubHullFlags break_flags);

private:
};

#endif

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