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  * trimregion.h
33  *
34  */
35 
36 #ifndef __glutrimregion_h_
37 #define __glutrimregion_h_
38 
39 #include "trimline.h"
40 #include "gridline.h"
41 #include "uarray.h"
42 
43 class Arc;
44 class Backend;
45 
46 class TrimRegion {
47 public:
48 			TrimRegion();
49     Trimline		left;
50     Trimline		right;
51     Gridline		top;
52     Gridline		bot;
53     Uarray		uarray;
54 
55     void		init( REAL );
56     void		advance( REAL, REAL, REAL );
57     void		setDu( REAL );
58     void		init( long, Arc_ptr );
59     void		getPts( Arc_ptr );
60     void		getPts( Backend & );
61     void		getGridExtent( TrimVertex *, TrimVertex * );
62     void		getGridExtent( void );
63     int			canTile( void );
64 private:
65     REAL		oneOverDu;
66 };
67 
68 inline void
69 TrimRegion::init( REAL vval )
70 {
71     bot.vval = vval;
72 }
73 
74 inline void
75 TrimRegion::advance( REAL topVindex, REAL botVindex, REAL botVval )
76 {
77     top.vindex	= (long) topVindex;
78     bot.vindex	= (long) botVindex;
79     top.vval	= bot.vval;
80     bot.vval	= botVval;
81     top.ustart	= bot.ustart;
82     top.uend	= bot.uend;
83 }
84 #endif /* __glutrimregion_h_ */
85