reactos/dll/opengl/mesa/src/glu/sgi/libnurbs/internals/trimline.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  * trimline.h
  33  *
  34  */
  35
  36 #ifndef __glutrimline_h_
  37 #define __glutrimline_h_
  38
  39 class Arc;
  40 class Backend;
  41
  42 #include "trimvertex.h"
  43 #include "jarcloc.h"
  44
  45
  46 class Trimline {
  47 private:
  48     TrimVertex**        pts;
  49     long                numverts;
  50     long                i;
  51     long                size;
  52     Jarcloc             jarcl;
  53     TrimVertex          t, b;
  54     TrimVertex          *tinterp, *binterp;
  55     void                reset( void ) { numverts = 0; }
  56     inline void         grow( long );
  57     inline void         swap( void );
  58     inline void         append( TrimVertex * );
  59     static long         interpvert( TrimVertex *, TrimVertex *, TrimVertex *, REAL );
  60
  61
  62
  63 public:
  64                         Trimline();
  65                         ~Trimline();
  66     void                init( TrimVertex * );
  67     void                init( long, Arc_ptr, long );
  68     void                getNextPt( void );
  69     void                getPrevPt( void );
  70     void                getNextPts( REAL, Backend & );
  71     void                getPrevPts( REAL, Backend & );
  72     void                getNextPts( Arc_ptr );
  73     void                getPrevPts( Arc_ptr );
  74     inline TrimVertex * next( void );
  75     inline TrimVertex * prev( void );
  76     inline TrimVertex * first( void );
  77     inline TrimVertex * last( void );
  78 };
  79
  80 inline TrimVertex *
  81 Trimline::next( void )
  82 {
  83     if( i < numverts) return pts[i++]; else return 0;
  84 }
  85
  86 inline TrimVertex *
  87 Trimline::prev( void )
  88 {
  89     if( i >= 0 ) return pts[i--]; else return 0;
  90 }
  91
  92 inline TrimVertex *
  93 Trimline::first( void )
  94 {
  95     i = 0; return pts[i];
  96 }
  97
  98 inline TrimVertex *
  99 Trimline::last( void )
 100 {
 101     i = numverts; return pts[--i];
 102 }
 103 #endif /* __glutrimline_h_ */