src/glu/sgi/libnurbs/internals/slicer.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  * slicer.h
  33  *
  34  */
  35
  36 #ifndef __gluslicer_h_
  37 #define __gluslicer_h_
  38
  39 #include "trimregion.h"
  40 #include "mesher.h"
  41 #include "coveandtiler.h"
  42 #include "primitiveStream.h"
  43 #include "rectBlock.h"
  44
  45 class Backend;
  46 class Arc;
  47 class TrimVertex;
  48
  49 class Slicer : public CoveAndTiler, public Mesher {
  50 public:
  51                         Slicer( Backend & );
  52                         ~Slicer( void );
  53     void                slice( Arc_ptr );
  54     void                slice_old( Arc_ptr);
  55     void                slice_new( Arc_ptr );
  56     void                evalStream(primStream* );
  57     void                evalRBArray(rectBlockArray* rbArray, gridWrap* grid);
  58
  59     void                outline( Arc_ptr );
  60     void                setstriptessellation( REAL, REAL );
  61     void                setisolines( int );
  62
  63     void                set_ulinear(int ulinear_flag)
  64       {
  65         ulinear = ulinear_flag;
  66       }
  67     void                set_vlinear(int vlinear_flag)
  68       {
  69         vlinear = vlinear_flag;
  70       }
  71 private:
  72     Backend&            backend;
  73     REAL                oneOverDu;
  74     REAL                du, dv;
  75     int                 isolines;
  76
  77     void                outline( void );
  78     void                initGridlines( void );
  79     void                advanceGridlines( long );
  80
  81     int                ulinear; //indicate whether uorder is 2 or not
  82     int                vlinear; //indicate whether vorder is 2 or not
  83 };
  84 #endif /* __gluslicer_h_ */