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168 lines
5 KiB
C++
168 lines
5 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* bin.c++
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/bin.cc,v 1.1 2004/02/02 16:39:10 navaraf Exp $
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*/
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#include "glimports.h"
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#include "mystdio.h"
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#include "myassert.h"
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#include "bin.h"
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/*----------------------------------------------------------------------------
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* Constructor and destructor
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*----------------------------------------------------------------------------
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*/
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Bin::Bin()
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{
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head = NULL;
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}
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Bin::~Bin()
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{
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assert( head == NULL);
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}
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/*----------------------------------------------------------------------------
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* remove_this_arc - remove given Arc_ptr from bin
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*----------------------------------------------------------------------------
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*/
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void
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Bin::remove_this_arc( Arc_ptr arc )
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{
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Arc_ptr *j;
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for( j = &(head); (*j != 0) && (*j != arc); j = &((*j)->link) );
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if( *j != 0 ) {
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if( *j == current )
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current = (*j)->link;
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*j = (*j)->link;
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}
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}
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/*----------------------------------------------------------------------------
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* numarcs - count number of arcs in bin
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*----------------------------------------------------------------------------
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*/
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int
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Bin::numarcs()
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{
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long count = 0;
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for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
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count++;
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return count;
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}
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/*----------------------------------------------------------------------------
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* adopt - place an orphaned arcs into their new parents bin
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*----------------------------------------------------------------------------
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*/
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void
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Bin::adopt()
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{
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markall();
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Arc_ptr orphan;
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while( (orphan = removearc()) != NULL ) {
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for( Arc_ptr parent = orphan->next; parent != orphan; parent = parent->next ) {
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if (! parent->ismarked() ) {
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orphan->link = parent->link;
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parent->link = orphan;
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orphan->clearmark();
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break;
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}
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}
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}
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}
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/*----------------------------------------------------------------------------
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* show - print out descriptions of the arcs in the bin
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*----------------------------------------------------------------------------
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*/
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void
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Bin::show( const char *name )
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{
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#ifndef NDEBUG
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dprintf( "%s\n", name );
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for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
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jarc->show( );
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#endif
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}
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/*----------------------------------------------------------------------------
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* markall - mark all arcs with an identifying tag
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*----------------------------------------------------------------------------
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*/
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void
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Bin::markall()
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{
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for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() )
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jarc->setmark();
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}
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/*----------------------------------------------------------------------------
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* listBezier - print out all arcs that are untessellated border arcs
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*----------------------------------------------------------------------------
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*/
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void
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Bin::listBezier( void )
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{
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for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() ) {
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if( jarc->isbezier( ) ) {
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assert( jarc->pwlArc->npts == 2 );
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TrimVertex *pts = jarc->pwlArc->pts;
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REAL s1 = pts[0].param[0];
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REAL t1 = pts[0].param[1];
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REAL s2 = pts[1].param[0];
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REAL t2 = pts[1].param[1];
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#ifndef NDEBUG
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dprintf( "arc (%g,%g) (%g,%g)\n", s1, t1, s2, t2 );
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#endif
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}
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}
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}
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