1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33*/
34
35/*
36 * bin.c++
37 *
38 */
39
40#include "glimports.h"
41#include "mystdio.h"
42#include "myassert.h"
43#include "bin.h"
44
45/*----------------------------------------------------------------------------
46 * Constructor and destructor
47 *----------------------------------------------------------------------------
48 */
49Bin::Bin()
50{
51    head = NULL;
52    current = NULL;
53}
54
55Bin::~Bin()
56{
57    assert( head == NULL);
58}
59
60/*----------------------------------------------------------------------------
61 * remove_this_arc - remove given Arc_ptr from bin
62 *----------------------------------------------------------------------------
63 */
64
65void
66Bin::remove_this_arc( Arc_ptr arc )
67{
68    Arc_ptr *j;
69    for( j = &(head); (*j != 0) && (*j != arc); j = &((*j)->link) );
70
71    if( *j != 0 ) {
72        if( *j == current )
73	    current = (*j)->link;
74	*j = (*j)->link;
75    }
76}
77
78/*----------------------------------------------------------------------------
79 * numarcs - count number of arcs in bin
80 *----------------------------------------------------------------------------
81 */
82
83int
84Bin::numarcs()
85{
86    long count = 0;
87    for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
88	count++;
89    return count;
90}
91
92/*----------------------------------------------------------------------------
93 * adopt - place an orphaned arcs into their new parents bin
94 *----------------------------------------------------------------------------
95 */
96
97void
98Bin::adopt()
99{
100    markall();
101
102    Arc_ptr orphan;
103    while( (orphan = removearc()) != NULL ) {
104	for( Arc_ptr parent = orphan->next; parent != orphan; parent = parent->next ) {
105	    if (! parent->ismarked() ) {
106		orphan->link = parent->link;
107		parent->link = orphan;
108		orphan->clearmark();
109		break;
110	    }
111	}
112    }
113}
114
115
116/*----------------------------------------------------------------------------
117 * show - print out descriptions of the arcs in the bin
118 *----------------------------------------------------------------------------
119 */
120
121void
122Bin::show( const char *name )
123{
124#ifndef NDEBUG
125    _glu_dprintf( "%s\n", name );
126    for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
127        jarc->show( );
128#endif
129}
130
131
132
133/*----------------------------------------------------------------------------
134 * markall - mark all arcs with an identifying tag
135 *----------------------------------------------------------------------------
136 */
137
138void
139Bin::markall()
140{
141    for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() )
142	jarc->setmark();
143}
144
145/*----------------------------------------------------------------------------
146 * listBezier - print out all arcs that are untessellated border arcs
147 *----------------------------------------------------------------------------
148 */
149
150void
151Bin::listBezier( void )
152{
153    for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() ) {
154	if( jarc->isbezier( ) ) {
155    	    assert( jarc->pwlArc->npts == 2 );
156#ifndef NDEBUG
157	    TrimVertex  *pts = jarc->pwlArc->pts;
158    	    REAL s1 = pts[0].param[0];
159    	    REAL t1 = pts[0].param[1];
160    	    REAL s2 = pts[1].param[0];
161    	    REAL t2 = pts[1].param[1];
162	   _glu_dprintf( "arc (%g,%g) (%g,%g)\n", s1, t1, s2, t2 );
163#endif
164	}
165    }
166}
167
168