reader.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
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 */

/*
 * 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; curvetype = ct_none; save = 0; nuid = 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 ) 
               { bezier_curves = 0; type = _type; tesselation = 0; method = 0; next = 0; used = 0; save = 0; owner = 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; save = 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 ) 
               { bezier_patches = 0; type = _type; owner = 0; next = 0; save = 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; save = 0; nuid = 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; save = 0; }
            Property( long _tag, INREAL _value )
            { type = 0; tag = _tag; value = (REAL) _value; save = 0; }
    };

class NurbsTessellator;
#endif /* __glureader_h_ */