GEO/GEO_Breakpoint.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:
 *      Cristin Barghiel
 *      Side Effects Software Inc.
 *      20 Maud St.
 *      Toronto, Ontario,  M5V 2M5
 *      Canada
 *      416-366-4607
 *
 * NAME:        GEO_Breakpoint (C++)
 *
 * COMMENTS:
 *      Breakpoint.
 *
 */

#ifndef __GEO_Breakpoint_h__
#define __GEO_Breakpoint_h__

#include "GEO_API.h"
#include <iostream.h>
#include <UT/UT_LinkList.h>
#include <GB/GB_Breakpoint.h>

#include "GEO_Primitive.h"
#include "GEO_PrimType.h"


class GEO_API GEO_Breakpoint : public GB_Breakpoint
{
public:
    // Class constructor and destructor.
    GEO_Breakpoint(GB_Primitive *prim = 0, int uidx = -1, int vidx = -1) :
        GB_Breakpoint( (prim && (prim->getPrimitiveId() & GEOSPLINE)) ? prim:0,
                       uidx, vidx) 
    { 
    }

    GEO_Breakpoint(const GEO_Breakpoint &b) : GB_Breakpoint(b) { }
    GEO_Breakpoint(const GB_Breakpoint &b)  : GB_Breakpoint(b) { }

    virtual ~GEO_Breakpoint();

    // Compute the location of the breakpoint. Return 0 if OK, else -1.
    int                  evaluate(UT_Vector4 &pos, int du=0, int dv=0) const;

    // This method performs the iterateFunc on all the CVs affecting this
    // breakpoint and returns the sum of the results.
    int                  iterateOverCVs(void *data, iterateFuncPtr func);
    int                  iterateOverCVs(void *data, iterateVertexFuncPtr func);

    // These methods return the knot indices corresponding to the breakpoint,
    // or the parameter values at these knot indices.  Pointers to the bases
    // are returned in ubasis_ret and vbasis_ret, if these arguments are
    // not nil.
    void                 getKnotIndices(int &ukidx, int &vkidx,
                                        GB_Basis **ubasis_ret=0,
                                        GB_Basis **vbasis_ret=0) const;
    void                 getParameter(float &u, float &v) const;
};

#endif

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