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
39class Arc;
40class Backend;
41
42#include "trimvertex.h"
43#include "jarcloc.h"
44
45
46class Trimline {
47private:
48    TrimVertex**	pts;
49    long 		numverts;
50    long		i;
51    long		size;
52    Jarcloc		jarcl;
53    TrimVertex		t, b;
54    TrimVertex 		*tinterp, *binterp;
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
63public:
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
80inline TrimVertex *
81Trimline::next( void )
82{
83    if( i < numverts) return pts[i++]; else return 0;
84}
85
86inline TrimVertex *
87Trimline::prev( void )
88{
89    if( i >= 0 ) return pts[i--]; else return 0;
90}
91
92inline TrimVertex *
93Trimline::first( void )
94{
95    i = 0; return pts[i];
96}
97
98inline TrimVertex *
99Trimline::last( void )
100{
101    i = numverts; return pts[--i];
102}
103#endif /* __glutrimline_h_ */
104