dll/opengl/glu32/src/libnurbs/internals/trimregion.h

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /*
  32  * trimregion.h
  33  *
  34  */
  35
  36 #ifndef __glutrimregion_h_
  37 #define __glutrimregion_h_
  38
  39 #include "trimline.h"
  40 #include "gridline.h"
  41 #include "uarray.h"
  42
  43 class Arc;
  44 class Backend;
  45
  46 class TrimRegion {
  47 public:
  48                         TrimRegion();
  49     Trimline            left;
  50     Trimline            right;
  51     Gridline            top;
  52     Gridline            bot;
  53     Uarray              uarray;
  54
  55     void                init( REAL );
  56     void                advance( REAL, REAL, REAL );
  57     void                setDu( REAL );
  58     void                init( long, Arc_ptr );
  59     void                getPts( Arc_ptr );
  60     void                getPts( Backend & );
  61     void                getGridExtent( TrimVertex *, TrimVertex * );
  62     void                getGridExtent( void );
  63     int                 canTile( void );
  64 private:
  65     REAL                oneOverDu;
  66 };
  67
  68 inline void
  69 TrimRegion::init( REAL vval )
  70 {
  71     bot.vval = vval;
  72 }
  73
  74 inline void
  75 TrimRegion::advance( REAL topVindex, REAL botVindex, REAL botVval )
  76 {
  77     top.vindex  = (long) topVindex;
  78     bot.vindex  = (long) botVindex;
  79     top.vval    = bot.vval;
  80     bot.vval    = botVval;
  81     top.ustart  = bot.ustart;
  82     top.uend    = bot.uend;
  83 }
  84 #endif /* __glutrimregion_h_ */