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  * slicer.h
33  *
34  */
35 
36 #ifndef __gluslicer_h_
37 #define __gluslicer_h_
38 
39 //#include "trimregion.h"
40 #include "mesher.h"
41 #include "coveandtiler.h"
42 //#include "primitiveStream.h"
43 #include "rectBlock.h"
44 
45 class Backend;
46 class Arc;
47 class TrimVertex;
48 
49 class Slicer : public CoveAndTiler, public Mesher {
50 public:
51     			Slicer( Backend & );
52 			~Slicer( void );
53     void		slice( Arc_ptr );
54     void		slice_old( Arc_ptr);
55     void		slice_new( Arc_ptr );
56     void                evalStream(primStream* );
57     void                evalRBArray(rectBlockArray* rbArray, gridWrap* grid);
58 
59     void		outline( Arc_ptr );
60     void		setstriptessellation( REAL, REAL );
61     void		setisolines( int );
62 
63     void                set_ulinear(int ulinear_flag)
64       {
65 	ulinear = ulinear_flag;
66       }
67     void                set_vlinear(int vlinear_flag)
68       {
69 	vlinear = vlinear_flag;
70       }
71 private:
72     Backend&		backend;
73     REAL		oneOverDu;
74     REAL		du, dv;
75     int			isolines;
76 
77     void		outline( void );
78     void		initGridlines( void );
79     void		advanceGridlines( long );
80 
81     int                ulinear; //indicate whether uorder is 2 or not
82     int                vlinear; //indicate whether vorder is 2 or not
83 };
84 #endif /* __gluslicer_h_ */
85