reactos/dll/win32/glu32/libnurbs/internals/arc.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  * arc.h
  37  *
  38  * $Date$ $Revision: 1.1 $
  39  * $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/arc.h,v 1.1 2004/02/02 16:39:10 navaraf Exp $
  40  */
  41
  42 #ifndef __gluarc_h_
  43 #define __gluarc_h_
  44
  45 #include "myassert.h"
  46 #include "bufpool.h"
  47 #include "mystdio.h"
  48 #include "types.h"
  49 #include "pwlarc.h"
  50 #include "trimvertex.h"
  51
  52 class Bin;
  53 class Arc;
  54 struct BezierArc;
  55
  56 typedef class Arc *Arc_ptr;
  57
  58 enum arc_side { arc_none = 0, arc_right, arc_top, arc_left, arc_bottom };
  59
  60
  61 class Arc: public PooledObj { /* an arc, in two list, the trim list and bin */
  62
  63 public:
  64     static const int bezier_tag;
  65     static const int arc_tag;
  66     static const int tail_tag;
  67     Arc_ptr             prev;           /* trim list pointer */
  68     Arc_ptr             next;           /* trim list pointer */
  69     Arc_ptr             link;           /* bin pointers */
  70     BezierArc *         bezierArc;      /* associated bezier arc */
  71     PwlArc *            pwlArc; /* associated pwl arc */
  72     long                type;           /* curve type */
  73     long                nuid;
  74
  75     inline              Arc( Arc *, PwlArc * );
  76     inline              Arc( arc_side, long );
  77
  78     Arc_ptr             append( Arc_ptr );
  79     int                 check( void );
  80     int                 isMonotone( void );
  81     int                 isDisconnected( void );
  82     int                 numpts( void );
  83     void                markverts( void );
  84     void                getextrema( Arc_ptr[4] );
  85     void                print( void );
  86     void                show( void );
  87     void                makeSide( PwlArc *, arc_side );
  88     inline int          isTessellated() { return pwlArc ? 1 : 0; }
  89     inline long         isbezier()      { return type & bezier_tag; }
  90     inline void         setbezier()     { type |= bezier_tag; }
  91     inline void         clearbezier()   { type &= ~bezier_tag; }
  92     inline long         npts()          { return pwlArc->npts; }
  93     inline TrimVertex * pts()           { return pwlArc->pts; }
  94     inline REAL *       tail()          { return pwlArc->pts[0].param; }
  95     inline REAL *       head()          { return next->pwlArc->pts[0].param; }
  96     inline REAL *       rhead()         { return pwlArc->pts[pwlArc->npts-1].param; }
  97     inline long         ismarked()      { return type & arc_tag; }
  98     inline void         setmark()       { type |= arc_tag; }
  99     inline void         clearmark()     { type &= (~arc_tag); }
 100     inline void         clearside()     { type &= ~(0x7 << 8); }
 101     inline void         setside( arc_side s ) { clearside(); type |= (((long)s)<<8); }
 102     inline arc_side     getside()       { return (arc_side) ((type>>8) & 0x7); }
 103     inline int          getitail()      { return type & tail_tag; }
 104     inline void         setitail()      { type |= tail_tag; }
 105     inline void         clearitail()    { type &= (~tail_tag); }
 106 };
 107
 108 /*--------------------------------------------------------------------------
 109  * Arc - initialize a new Arc with the same type and uid of
 110  *          a given Arc and a given pwl arc
 111  *--------------------------------------------------------------------------
 112  */
 113
 114 inline
 115 Arc::Arc( Arc *j, PwlArc *p )
 116 {
 117     bezierArc = NULL;
 118     pwlArc = p;
 119     type = j->type;
 120     nuid = j->nuid;
 121 }
 122
 123 /*--------------------------------------------------------------------------
 124  * Arc - initialize a new Arc with the same type and uid of
 125  *          a given Arc and a given pwl arc
 126  *--------------------------------------------------------------------------
 127  */
 128
 129 inline
 130 Arc::Arc( arc_side side, long _nuid )
 131 {
 132     bezierArc = NULL;
 133     pwlArc = NULL;
 134     type = 0;
 135     setside( side );
 136     nuid = _nuid;
 137 }
 138
 139 #endif /* __gluarc_h_ */