reader.h

/*
 * 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.
 */

/*
 * reader.h
 *
 */

#ifndef __glureader_h_
#define __glureader_h_

#include "bufpool.h"
#include "types.h"

enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
    
struct Property;
struct O_surface;
struct O_nurbssurface;
struct O_trim;
class O_pwlcurve;
struct O_nurbscurve;
struct O_curve;
class  Quilt;
class TrimVertex;


struct O_curve : public PooledObj {
    union {
        O_nurbscurve    *o_nurbscurve;
        O_pwlcurve      *o_pwlcurve;
    } curve;
    Curvetype           curvetype;      /* arc type: pwl or nurbs       */
    O_curve *           next;           /* next arc in loop             */
    O_surface *         owner;          /* owning surface               */
    int                 used;           /* curve called in cur surf     */
    int                 save;           /* 1 if in display list         */
    long                nuid;
                        O_curve() { next = 0; used = 0; owner = 0; 
                                    curve.o_pwlcurve = 0; }
    };

struct O_nurbscurve : public PooledObj {
    Quilt               *bezier_curves; /* array of bezier curves       */
    long                type;           /* range descriptor             */
    REAL                tesselation;    /* tesselation tolerance        */
    int                 method;         /* tesselation method           */
    O_nurbscurve *      next;           /* next curve in list           */
    int                 used;           /* curve called in cur surf     */
    int                 save;           /* 1 if in display list         */
    O_curve *           owner;          /* owning curve                 */
                        O_nurbscurve( long _type ) 
                           { type = _type; owner = 0; next = 0; used = 0; }
    };
 
class O_pwlcurve : public PooledObj {
public:
    TrimVertex          *pts;           /* array of trim vertices       */
    int                 npts;           /* number of trim vertices      */
    O_pwlcurve *        next;           /* next curve in list           */
    int                 used;           /* curve called in cur surf     */
    int                 save;           /* 1 if in display list         */
    O_curve *           owner;          /* owning curve                 */
                        O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
    };

struct O_trim : public PooledObj {
    O_curve             *o_curve;       /* closed trim loop             */
    O_trim *            next;           /* next loop along trim         */
    int                 save;           /* 1 if in display list         */
                        O_trim() { next = 0; o_curve = 0; }
    };

struct O_nurbssurface : public PooledObj {
    Quilt *             bezier_patches;/* array of bezier patches       */
    long                type;           /* range descriptor             */
    O_surface *         owner;          /* owning surface               */
    O_nurbssurface *    next;           /* next surface in chain        */
    int                 save;           /* 1 if in display list         */
    int                 used;           /* 1 if prev called in block    */
                        O_nurbssurface( long _type ) 
                           { type = _type; owner = 0; next = 0; used = 0; }
    };

struct O_surface : public PooledObj {
    O_nurbssurface *    o_nurbssurface; /* linked list of surfaces      */
    O_trim *            o_trim;         /* list of trim loops           */
    int                 save;           /* 1 if in display list         */
    long                nuid;
                        O_surface() { o_trim = 0; o_nurbssurface = 0; }
    };

struct Property : public PooledObj {
    long                type;
    long                tag;
    REAL                value;
    int                 save;           /* 1 if in display list         */
                        Property( long _type, long _tag, INREAL _value )
                        { type = _type; tag = _tag; value = (REAL) _value; }
                        Property( long _tag, INREAL _value )
                        { type = 0; tag = _tag; value = (REAL) _value; }
    };

class NurbsTessellator;
#endif /* __glureader_h_ */