src/glu/sgi/libnurbs/internals/hull.h

   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  * hull.h
  37  *
  38  * $Date: 2001/08/07 17:34:11 $ $Revision: 1.2 $
  39  * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/hull.h,v 1.2 2001/08/07 17:34:11 brianp Exp $
  40  */
  41
  42 #ifndef __gluhull_h_
  43 #define __gluhull_h_
  44
  45 #include "trimline.h"
  46 #include "trimregion.h"
  47 #include "trimvertex.h"
  48 #include "gridtrimvertex.h"
  49
  50 struct Gridline;
  51 class Uarray;
  52
  53 class Hull : virtual public TrimRegion {
  54 public:
  55                         Hull( void );
  56                         ~Hull( void );
  57     void                init( void );
  58     GridTrimVertex *    nextlower( GridTrimVertex * );
  59     GridTrimVertex *    nextupper( GridTrimVertex * );
  60 private:
  61     struct Side {
  62         Trimline        *left;
  63         Gridline        *line;
  64         Trimline        *right;
  65         long            index;
  66     };
  67
  68     Side                lower;
  69     Side                upper;
  70     Trimline            fakeleft;
  71     Trimline            fakeright;
  72 };
  73
  74
  75 #endif /* __gluhull_h_ */