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 * trimline.h
33 *
34 */
35
36 #ifndef __glutrimline_h_
37 #define __glutrimline_h_
38
39 class Arc;
40 class Backend;
41
42 //#include "trimvertex.h"
43 #include "jarcloc.h"
44
45
46 class Trimline {
47 private:
48 TrimVertex** pts;
49 long numverts;
50 long i;
51 long size;
52 Jarcloc jarcl;
53 TrimVertex t, b;
54 TrimVertex *tinterp, *binterp;
reset(void)55 void reset( void ) { numverts = 0; }
56 inline void grow( long );
57 inline void swap( void );
58 inline void append( TrimVertex * );
59 static long interpvert( TrimVertex *, TrimVertex *, TrimVertex *, REAL );
60
61
62
63 public:
64 Trimline();
65 ~Trimline();
66 void init( TrimVertex * );
67 void init( long, Arc_ptr, long );
68 void getNextPt( void );
69 void getPrevPt( void );
70 void getNextPts( REAL, Backend & );
71 void getPrevPts( REAL, Backend & );
72 void getNextPts( Arc_ptr );
73 void getPrevPts( Arc_ptr );
74 inline TrimVertex * next( void );
75 inline TrimVertex * prev( void );
76 inline TrimVertex * first( void );
77 inline TrimVertex * last( void );
78 };
79
80 inline TrimVertex *
next(void)81 Trimline::next( void )
82 {
83 if( i < numverts) return pts[i++]; else return 0;
84 }
85
86 inline TrimVertex *
prev(void)87 Trimline::prev( void )
88 {
89 if( i >= 0 ) return pts[i--]; else return 0;
90 }
91
92 inline TrimVertex *
first(void)93 Trimline::first( void )
94 {
95 i = 0; return pts[i];
96 }
97
98 inline TrimVertex *
last(void)99 Trimline::last( void )
100 {
101 i = numverts; return pts[--i];
102 }
103 #endif /* __glutrimline_h_ */
104