nurbstess.h

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/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */
 
/*
 * nurbstess.h
 *
 */
 
#ifndef __glunurbstess_h_
#define __glunurbstess_h_
 
//#include "mysetjmp.h"
#include "subdivider.h"
#include "renderhints.h"
#include "backend.h"
#include "maplist.h"
#include "reader.h"
//#include "nurbsconsts.h"
 
struct Knotvector;
class Quilt;
class DisplayList;
class BasicCurveEvaluator;
class BasicSurfaceEvaluator;
 
class NurbsTessellator {
public:
                NurbsTessellator( BasicCurveEvaluator &c,
                                          BasicSurfaceEvaluator &e );
                virtual ~NurbsTessellator( void );
 
    void            getnurbsproperty( long, INREAL * );
    void            getnurbsproperty( long, long, INREAL * );
    void            setnurbsproperty( long, INREAL );
    void            setnurbsproperty( long, long, INREAL );
    void        setnurbsproperty( long, long, INREAL * );
    void        setnurbsproperty( long, long, INREAL *, long, long );
 
    // called before a tessellation begins/ends
    virtual void    bgnrender( void );
    virtual void    endrender( void );
 
    // called to make a display list of the output vertices
    virtual void    makeobj( int n );
    virtual void    closeobj( void );
 
    // called when a error occurs
    virtual void    errorHandler( int );
 
    void            bgnsurface( long );
    void            endsurface( void );
    void            bgntrim( void );
    void            endtrim( void );
    void            bgncurve( long );
    void            endcurve( void );
    void            pwlcurve( long, INREAL[], long, long );
    void            nurbscurve( long, INREAL[], long, INREAL[], long, long );
    void            nurbssurface( long, INREAL[], long, INREAL[], long, long,
                INREAL[], long, long, long );
 
    void        defineMap( long, long, long );
    void        redefineMaps( void );
 
    // recording of input description
    void        discardRecording( void * );
    void *      beginRecording( void );
    void        endRecording( void );
    void        playRecording( void * );
 
    //for optimizing untrimmed nurbs in the case of domain distance sampling
    void set_domain_distance_u_rate(REAL u_rate);
    void set_domain_distance_v_rate(REAL v_rate);
    void set_is_domain_distance_sampling(int flag);
    
 
protected:
    Renderhints     renderhints;
    Maplist     maplist;
    Backend     backend;
 
private:
 
    void        resetObjects( void );
    int         do_check_knots( Knotvector *, const char * );
    void        do_nurbserror( int );
    void        do_bgncurve( O_curve * );
    void        do_endcurve( void );
    void        do_freeall( void );
    void        do_freecurveall( O_curve * );
    void        do_freebgntrim( O_trim * );
    void        do_freebgncurve( O_curve * );
    void        do_freepwlcurve( O_pwlcurve * );
    void        do_freenurbscurve( O_nurbscurve * );
    void        do_freenurbssurface( O_nurbssurface * );
    void        do_freebgnsurface( O_surface * );
    void        do_bgnsurface( O_surface * );
    void        do_endsurface( void );
    void        do_bgntrim( O_trim * );
    void        do_endtrim( void );
    void        do_pwlcurve( O_pwlcurve * );
    void        do_nurbscurve( O_nurbscurve * );
    void        do_nurbssurface( O_nurbssurface * );
    void        do_freenurbsproperty( Property * );
    void        do_setnurbsproperty( Property * );
    void        do_setnurbsproperty2( Property * );
 
    Subdivider      subdivider;
    JumpBuffer*     jumpbuffer;
    Pool        o_pwlcurvePool;
    Pool        o_nurbscurvePool;
    Pool        o_curvePool;
    Pool        o_trimPool;
    Pool        o_surfacePool;
    Pool        o_nurbssurfacePool;
    Pool        propertyPool;
public:
    Pool        quiltPool;
private:
    TrimVertexPool  extTrimVertexPool;
 
    int         inSurface;      /* bgnsurface seen */
    int         inCurve;        /* bgncurve seen */
    int         inTrim;         /* bgntrim seen */
    int         isCurveModified;    /* curve changed */
    int         isTrimModified;     /* trim curves changed */
    int         isSurfaceModified;  /* surface changed */
    int         isDataValid;        /* all data is good */
    int         numTrims;       /* valid trim regions */
    int         playBack;
 
    O_trim**        nextTrim;       /* place to link o_trim */
    O_curve**       nextCurve;      /* place to link o_curve */
    O_nurbscurve**  nextNurbscurve;     /* place to link o_nurbscurve */
    O_pwlcurve**    nextPwlcurve;       /* place to link o_pwlcurve */
    O_nurbssurface**    nextNurbssurface;   /* place to link o_nurbssurface */
 
    O_surface*      currentSurface;
    O_trim*     currentTrim;
    O_curve*        currentCurve;
 
    DisplayList     *dl;
 
};
 
#endif /* __glunurbstess_h_ */