dll/opengl/mesa/src/glu/sgi/libnurbs/internals/quilt.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  * quilt.h
  33  *
  34  */
  35
  36 #ifndef __gluquilt_h_
  37 #define __gluquilt_h_
  38
  39 #include "defines.h"
  40 #include "bufpool.h"
  41 #include "types.h"
  42
  43 class Backend;
  44 class Mapdesc;
  45 class Flist;
  46 struct Knotvector;
  47
  48 /* constants for memory allocation of NURBS to Bezier conversion */
  49 #define MAXDIM          2
  50
  51 struct Quiltspec { /* a specification for a dimension of a quilt */
  52     int                 stride;         /* words between points */
  53     int                 width;          /* number of segments */
  54     int                 offset;         /* words to first point */
  55     int                 order;          /* order */
  56     int                 index;          /* current segment number */
  57     int                 bdry[2];        /* boundary edge flag */
  58     REAL                step_size;
  59     Knot *              breakpoints;
  60 };
  61
  62 typedef Quiltspec *Quiltspec_ptr;
  63
  64 class Quilt : public PooledObj { /* an array of bezier patches */
  65 public:
  66                         Quilt( Mapdesc * );
  67     Mapdesc *           mapdesc;        /* map descriptor */
  68     REAL *              cpts;           /* control points */
  69     Quiltspec           qspec[MAXDIM];  /* the dimensional data */
  70     Quiltspec_ptr       eqspec;         /* qspec trailer */
  71     Quilt               *next;          /* next quilt in linked list */
  72
  73 public:
  74     void                deleteMe( Pool& );
  75     void                toBezier( Knotvector &, INREAL *, long  );
  76     void                toBezier( Knotvector &, Knotvector &, INREAL *, long  );
  77     void                select( REAL *, REAL * );
  78     int                 getDimension( void ) { return eqspec - qspec; }
  79     void                download( Backend & );
  80     void                downloadAll( REAL *, REAL *, Backend & );
  81     int                 isCulled( void );
  82     void                getRange( REAL *, REAL *, Flist&, Flist & );
  83     void                getRange( REAL *, REAL *, int, Flist & );
  84     void                getRange( REAL *, REAL *, Flist&  );
  85     void                findRates( Flist& slist, Flist& tlist, REAL[2] );
  86     void                findSampleRates( Flist& slist, Flist& tlist );
  87     void                show();
  88 };
  89
  90 typedef class Quilt *Quilt_ptr;
  91
  92 #endif /* __gluquilt_h_ */