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      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  */
     49 Bin::Bin()
     50 {
     51     head = NULL;
     52     current = NULL;
     53 }
     54 
     55 Bin::~Bin()
     56 {
     57     assert( head == NULL);
     58 }
     59 
     60 /*----------------------------------------------------------------------------
     61  * remove_this_arc - remove given Arc_ptr from bin
     62  *----------------------------------------------------------------------------
     63  */
     64 
     65 void
     66 Bin::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 
     83 int
     84 Bin::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 
     97 void
     98 Bin::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 
    121 void
    122 Bin::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 
    138 void
    139 Bin::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 
    150 void
    151 Bin::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