Merge commit 'origin/gallium-0.1' into gallium-0.2
[mesa.git] / src / glu / sgi / libnurbs / internals / hull.h
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 * hull.h
33 *
34 */
35
36 #ifndef __gluhull_h_
37 #define __gluhull_h_
38
39 #include "trimline.h"
40 #include "trimregion.h"
41 #include "trimvertex.h"
42 #include "gridtrimvertex.h"
43
44 struct Gridline;
45 class Uarray;
46
47 class Hull : virtual public TrimRegion {
48 public:
49 Hull( void );
50 ~Hull( void );
51 void init( void );
52 GridTrimVertex * nextlower( GridTrimVertex * );
53 GridTrimVertex * nextupper( GridTrimVertex * );
54 private:
55 struct Side {
56 Trimline *left;
57 Gridline *line;
58 Trimline *right;
59 long index;
60 };
61
62 Side lower;
63 Side upper;
64 Trimline fakeleft;
65 Trimline fakeright;
66 };
67
68
69 #endif /* __gluhull_h_ */