reactos/lib/glu32/libnurbs/internals/trimregion.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  * trimregion.h
  37  *
  38  * $Date$ $Revision: 1.1 $
  39  * $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/trimregion.h,v 1.1 2004/02/02 16:39:13 navaraf Exp $
  40  */
  41
  42 #ifndef __glutrimregion_h_
  43 #define __glutrimregion_h_
  44
  45 #include "trimline.h"
  46 #include "gridline.h"
  47 #include "uarray.h"
  48
  49 class Arc;
  50 class Backend;
  51
  52 class TrimRegion {
  53 public:
  54                         TrimRegion();
  55     Trimline            left;
  56     Trimline            right;
  57     Gridline            top;
  58     Gridline            bot;
  59     Uarray              uarray;
  60
  61     void                init( REAL );
  62     void                advance( REAL, REAL, REAL );
  63     void                setDu( REAL );
  64     void                init( long, Arc_ptr );
  65     void                getPts( Arc_ptr );
  66     void                getPts( Backend & );
  67     void                getGridExtent( TrimVertex *, TrimVertex * );
  68     void                getGridExtent( void );
  69     int                 canTile( void );
  70 private:
  71     REAL                oneOverDu;
  72 };
  73
  74 inline void
  75 TrimRegion::init( REAL vval )
  76 {
  77     bot.vval = vval;
  78 }
  79
  80 inline void
  81 TrimRegion::advance( REAL topVindex, REAL botVindex, REAL botVval )
  82 {
  83     top.vindex  = (long) topVindex;
  84     bot.vindex  = (long) botVindex;
  85     top.vval    = bot.vval;
  86     bot.vval    = botVval;
  87     top.ustart  = bot.ustart;
  88     top.uend    = bot.uend;
  89 }
  90 #endif /* __glutrimregion_h_ */