reactos/dll/glu32/libnurbs/internals/backend.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  * backend.h
  37  *
  38  * $Date$ $Revision: 1.1 $
  39  * $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/backend.h,v 1.1 2004/02/02 16:39:10 navaraf Exp $
  40  */
  41
  42 #ifndef __glubackend_h_
  43 #define __glubackend_h_
  44
  45 #include "trimvertex.h"
  46 #include "gridvertex.h"
  47 #include "gridtrimvertex.h"
  48
  49 class BasicCurveEvaluator;
  50 class BasicSurfaceEvaluator;
  51
  52 class Backend {
  53 private:
  54     BasicCurveEvaluator&        curveEvaluator;
  55     BasicSurfaceEvaluator&      surfaceEvaluator;
  56 public:
  57                         Backend( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e )
  58                         : curveEvaluator(c), surfaceEvaluator(e) {}
  59
  60     /* surface backend routines */
  61     void                bgnsurf( int, int, long  );
  62     void                patch( REAL, REAL, REAL, REAL );
  63     void                surfpts( long, REAL *, long, long, int, int,
  64                                  REAL, REAL, REAL, REAL );
  65     void                surfbbox( long, REAL *, REAL * );
  66     void                surfgrid( REAL, REAL, long, REAL, REAL, long );
  67     void                surfmesh( long, long, long, long );
  68     void                bgntmesh( char * );
  69     void                endtmesh( void );
  70     void                swaptmesh( void );
  71     void                tmeshvert( GridTrimVertex * );
  72     void                tmeshvert( TrimVertex * );
  73     void                tmeshvert( GridVertex * );
  74     void                tmeshvert( REAL u,  REAL v );
  75     void                linevert( TrimVertex * );
  76     void                linevert( GridVertex * );
  77     void                bgnoutline( void );
  78     void                endoutline( void );
  79     void                endsurf( void );
  80     void                triangle( TrimVertex*, TrimVertex*, TrimVertex* );
  81
  82     void                bgntfan();
  83     void                endtfan();
  84     void                bgnqstrip();
  85     void                endqstrip();
  86     void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
  87                                    int n_lower, REAL v_lower, REAL* lower_val
  88                                    );
  89     void                evalVStrip(int n_left, REAL u_left, REAL* left_val,
  90                                    int n_right, REAL v_right, REAL* right_val
  91                                    );
  92     void                tmeshvertNOGE(TrimVertex *t);
  93     void                tmeshvertNOGE_BU(TrimVertex *t);
  94     void                tmeshvertNOGE_BV(TrimVertex *t);
  95     void                preEvaluateBU(REAL u);
  96     void                preEvaluateBV(REAL v);
  97
  98
  99     /* curve backend routines */
 100     void                bgncurv( void );
 101     void                segment( REAL, REAL );
 102     void                curvpts( long, REAL *, long, int, REAL, REAL );
 103     void                curvgrid( REAL, REAL, long );
 104     void                curvmesh( long, long );
 105     void                curvpt( REAL  );
 106     void                bgnline( void );
 107     void                endline( void );
 108     void                endcurv( void );
 109 private:
 110 #ifndef NOWIREFRAME
 111     int                 wireframetris;
 112     int                 wireframequads;
 113     int                 npts;
 114     REAL                mesh[3][4];
 115     int                 meshindex;
 116 #endif
 117 };
 118
 119 #endif /* __glubackend_h_ */