IABSD.fr/xenocara/lib/libGLU/src/libnurbs/internals/bin.cc

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• Author : jsg
  Date : 2013-09-01 03:51:12
  Hash : 729f7da4
  Message : Update to GLU 9.0.0, GLU was previously part of Mesa but is now seperate. tested in a ports bulk build by landry@, ok matthieu@

• lib/libGLU/src/libnurbs/internals/bin.cc

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