1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31/*
32 * quilt.h
33 *
34 */
35
36#ifndef __gluquilt_h_
37#define __gluquilt_h_
38
39#include "defines.h"
40#include "bufpool.h"
41#include "types.h"
42
43class Backend;
44class Mapdesc;
45class Flist;
46struct Knotvector;
47
48/* constants for memory allocation of NURBS to Bezier conversion */
49#define	MAXDIM 		2
50
51struct Quiltspec { /* a specification for a dimension of a quilt */
52    int			stride;		/* words between points */
53    int			width;		/* number of segments */
54    int			offset;		/* words to first point */
55    int			order;		/* order */
56    int			index;		/* current segment number */
57    int			bdry[2];	/* boundary edge flag */
58    REAL  		step_size;
59    Knot *		breakpoints;
60};
61
62typedef Quiltspec *Quiltspec_ptr;
63
64class Quilt : public PooledObj { /* an array of bezier patches */
65public:
66    			Quilt( Mapdesc * );
67    Mapdesc *		mapdesc;	/* map descriptor */
68    REAL *		cpts;		/* control points */
69    Quiltspec		qspec[MAXDIM];	/* the dimensional data */
70    Quiltspec_ptr	eqspec;		/* qspec trailer */
71    Quilt		*next;		/* next quilt in linked list */
72
73public:
74    void		deleteMe( Pool& );
75    void		toBezier( Knotvector &, INREAL *, long  );
76    void		toBezier( Knotvector &, Knotvector &, INREAL *, long  );
77    void		select( REAL *, REAL * );
78    int			getDimension( void ) { return eqspec - qspec; }
79    void 		download( Backend & );
80    void		downloadAll( REAL *, REAL *, Backend & );
81    int 		isCulled( void );
82    void		getRange( REAL *, REAL *, Flist&, Flist & );
83    void		getRange( REAL *, REAL *, int, Flist & );
84    void		getRange( REAL *, REAL *, Flist&  );
85    void		findRates( Flist& slist, Flist& tlist, REAL[2] );
86    void		findSampleRates( Flist& slist, Flist& tlist );
87    void		show();
88};
89
90typedef class Quilt *Quilt_ptr;
91
92#endif /* __gluquilt_h_ */
93