src/glu/sgi/libnurbs/internals/quilt.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  * quilt.h
  37  *
  38  */
  39
  40 #ifndef __gluquilt_h_
  41 #define __gluquilt_h_
  42
  43 #include "defines.h"
  44 #include "bufpool.h"
  45 #include "types.h"
  46
  47 class Backend;
  48 class Mapdesc;
  49 class Flist;
  50 struct Knotvector;
  51
  52 /* constants for memory allocation of NURBS to Bezier conversion */
  53 #define MAXDIM          2
  54
  55 struct Quiltspec { /* a specification for a dimension of a quilt */
  56     int                 stride;         /* words between points */
  57     int                 width;          /* number of segments */
  58     int                 offset;         /* words to first point */
  59     int                 order;          /* order */
  60     int                 index;          /* current segment number */
  61     int                 bdry[2];        /* boundary edge flag */
  62     REAL                step_size;
  63     Knot *              breakpoints;
  64 };
  65
  66 typedef Quiltspec *Quiltspec_ptr;
  67
  68 class Quilt : public PooledObj { /* an array of bezier patches */
  69 public:
  70                         Quilt( Mapdesc * );
  71     Mapdesc *           mapdesc;        /* map descriptor */
  72     REAL *              cpts;           /* control points */
  73     Quiltspec           qspec[MAXDIM];  /* the dimensional data */
  74     Quiltspec_ptr       eqspec;         /* qspec trailer */
  75     Quilt               *next;          /* next quilt in linked list */
  76
  77 public:
  78     void                deleteMe( Pool& );
  79     void                toBezier( Knotvector &, INREAL *, long  );
  80     void                toBezier( Knotvector &, Knotvector &, INREAL *, long  );
  81     void                select( REAL *, REAL * );
  82     int                 getDimension( void ) { return eqspec - qspec; }
  83     void                download( Backend & );
  84     void                downloadAll( REAL *, REAL *, Backend & );
  85     int                 isCulled( void );
  86     void                getRange( REAL *, REAL *, Flist&, Flist & );
  87     void                getRange( REAL *, REAL *, int, Flist & );
  88     void                getRange( REAL *, REAL *, Flist&  );
  89     void                findRates( Flist& slist, Flist& tlist, REAL[2] );
  90     void                findSampleRates( Flist& slist, Flist& tlist );
  91     void                show();
  92 };
  93
  94 typedef class Quilt *Quilt_ptr;
  95
  96 #endif /* __gluquilt_h_ */