src/glu/sgi/libnurbs/internals/mapdesc.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  * mapdesc.h
  37  *
  38  * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
  39  * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/mapdesc.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
  40  */
  41
  42 #ifndef __glumapdesc_h_
  43 #define __glumapdesc_h_
  44
  45 #include "mystdio.h"
  46 #include "types.h"
  47 #include "defines.h"
  48 #include "bufpool.h"
  49 #include "nurbsconsts.h"
  50
  51 typedef REAL Maxmatrix[MAXCOORDS][MAXCOORDS];
  52
  53 class Backend;
  54
  55 class Mapdesc : public PooledObj {
  56     friend class Maplist;
  57
  58 public:
  59                         Mapdesc( long, int, int, Backend & );
  60     int                 isProperty( long );
  61     REAL                getProperty( long );
  62     void                setProperty( long, REAL );
  63     int                 isConstantSampling( void );
  64     int                 isDomainSampling( void );
  65     int                 isRangeSampling( void );
  66     int                 isSampling( void );
  67     int                 isParametricDistanceSampling( void );
  68     int                 isObjectSpaceParaSampling( void );
  69     int                 isObjectSpacePathSampling( void );
  70     int                 isSurfaceAreaSampling( void );
  71     int                 isPathLengthSampling( void );
  72     int                 isCulling( void );
  73     int                 isBboxSubdividing( void );
  74     long                getType( void );
  75
  76     /* curve routines */
  77     void                subdivide( REAL *, REAL *, REAL, int, int );
  78     int                 cullCheck( REAL *, int, int );
  79     void                xformBounding( REAL *, int, int, REAL *, int );
  80     void                xformCulling( REAL *, int, int, REAL *, int );
  81     void                xformSampling( REAL *, int, int, REAL *, int );
  82     void                xformMat( Maxmatrix, REAL *, int, int, REAL *, int );
  83     REAL                calcPartialVelocity ( REAL *, int, int, int, REAL );
  84     int                 project( REAL *, int, REAL *, int, int );
  85     REAL                calcVelocityRational( REAL *, int, int );
  86     REAL                calcVelocityNonrational( REAL *, int, int );
  87
  88     /* surface routines */
  89     void                subdivide( REAL *, REAL *, REAL, int, int, int, int );
  90     int                 cullCheck( REAL *, int, int, int, int );
  91     void                xformBounding( REAL *, int, int, int, int, REAL *, int, int );
  92     void                xformCulling( REAL *, int, int, int, int, REAL *, int, int );
  93     void                xformSampling( REAL *, int, int, int, int, REAL *, int, int );
  94     void                xformMat( Maxmatrix, REAL *, int, int, int, int, REAL *, int, int );
  95     REAL                calcPartialVelocity ( REAL *, REAL *, int, int, int, int, int, int, REAL, REAL, int );
  96     int                 project( REAL *, int, int, REAL *, int, int, int, int);
  97     void                surfbbox( REAL bb[2][MAXCOORDS] );
  98
  99     int                 bboxTooBig( REAL *, int, int, int, int, REAL [2][MAXCOORDS] );
 100     int                 xformAndCullCheck( REAL *, int, int, int, int );
 101
 102     void                identify( REAL[MAXCOORDS][MAXCOORDS] );
 103     void                setBboxsize( INREAL *);
 104     inline void         setBmat( INREAL*, long, long );
 105     inline void         setCmat( INREAL*, long, long );
 106     inline void         setSmat( INREAL*, long, long );
 107     inline int          isRational( void );
 108     inline int          getNcoords( void );
 109
 110     REAL                pixel_tolerance;    /* pathlength sampling tolerance */
 111     REAL                error_tolerance;    /* parametric error sampling tolerance*/
 112     REAL                object_space_error_tolerance;    /* object space tess*/
 113     REAL                clampfactor;
 114     REAL                minsavings;
 115     REAL                maxrate;
 116     REAL                maxsrate;
 117     REAL                maxtrate;
 118     REAL                bboxsize[MAXCOORDS];
 119
 120 private:
 121     long                type;
 122     int                 isrational;
 123     int                 ncoords;
 124     int                 hcoords;
 125     int                 inhcoords;
 126     int                 mask;
 127     Maxmatrix           bmat;
 128     Maxmatrix           cmat;
 129     Maxmatrix           smat;
 130     REAL                s_steps;                /* max samples in s direction */
 131     REAL                t_steps;                /* max samples in t direction */
 132     REAL                sampling_method;
 133     REAL                culling_method;         /* check for culling */
 134     REAL                bbox_subdividing;
 135     Mapdesc *           next;
 136     Backend &           backend;
 137
 138     void                bbox( REAL [2][MAXCOORDS], REAL *, int, int, int, int );
 139     REAL                maxDifference( int, REAL *, int );
 140     static void         copy( Maxmatrix, long, INREAL *, long, long );
 141
 142     /* individual control point routines */
 143     static void         transform4d( float[4], float[4], float[4][4] );
 144     static void         multmatrix4d ( float[4][4], const float[4][4],
 145                                          const float[4][4] );
 146     void                copyPt( REAL *, REAL * );
 147     void                sumPt( REAL *, REAL *, REAL *, REAL, REAL );
 148     void                xformSampling( REAL *, REAL * );
 149     void                xformCulling( REAL *, REAL * );
 150     void                xformRational( Maxmatrix, REAL *, REAL * );
 151     void                xformNonrational( Maxmatrix, REAL *, REAL * );
 152     unsigned int        clipbits( REAL * );
 153 };
 154
 155 inline void
 156 Mapdesc::setBmat( INREAL *mat, long rstride, long cstride )
 157 {
 158     copy( bmat, hcoords, mat, rstride, cstride );
 159 }
 160
 161 inline void
 162 Mapdesc::setCmat( INREAL *mat, long rstride, long cstride )
 163 {
 164     copy( cmat, hcoords, mat, rstride, cstride );
 165 }
 166
 167 inline void
 168 Mapdesc::setSmat( INREAL *mat, long rstride, long cstride )
 169 {
 170     copy( smat, hcoords, mat, rstride, cstride );
 171 }
 172
 173 inline long
 174 Mapdesc::getType( void )
 175 {
 176     return type;
 177 }
 178
 179 inline void
 180 Mapdesc::xformCulling( REAL *d, REAL *s )
 181 {
 182     if( isrational )
 183         xformRational( cmat, d, s );
 184     else
 185         xformNonrational( cmat, d, s );
 186 }
 187
 188 inline void
 189 Mapdesc::xformSampling( REAL *d, REAL *s )
 190 {
 191     if( isrational )
 192         xformRational( smat, d, s );
 193     else
 194         xformNonrational( smat, d, s );
 195 }
 196
 197 inline int
 198 Mapdesc::isRational( void )
 199 {
 200     return isrational ? 1 : 0;
 201 }
 202
 203 inline int
 204 Mapdesc::getNcoords( void )
 205 {
 206     return ncoords;
 207 }
 208
 209 inline int
 210 Mapdesc::isConstantSampling( void )
 211 {
 212     return ((sampling_method == N_FIXEDRATE) ? 1 : 0);
 213 }
 214
 215 inline int
 216 Mapdesc::isDomainSampling( void )
 217 {
 218     return ((sampling_method == N_DOMAINDISTANCE) ? 1 : 0);
 219 }
 220
 221 inline int
 222 Mapdesc::isParametricDistanceSampling( void )
 223 {
 224     return ((sampling_method == N_PARAMETRICDISTANCE) ? 1 : 0);
 225 }
 226
 227 inline int
 228 Mapdesc::isObjectSpaceParaSampling( void )
 229 {
 230     return ((sampling_method == N_OBJECTSPACE_PARA) ? 1 : 0);
 231 }
 232
 233 inline int
 234 Mapdesc::isObjectSpacePathSampling( void )
 235 {
 236     return ((sampling_method == N_OBJECTSPACE_PATH) ? 1 : 0);
 237 }
 238
 239 inline int
 240 Mapdesc::isSurfaceAreaSampling( void )
 241 {
 242     return ((sampling_method == N_SURFACEAREA) ? 1 : 0);
 243 }
 244
 245 inline int
 246 Mapdesc::isPathLengthSampling( void )
 247 {
 248     return ((sampling_method == N_PATHLENGTH) ? 1 : 0);
 249 }
 250
 251 inline int
 252 Mapdesc::isRangeSampling( void )
 253 {
 254     return ( isParametricDistanceSampling() || isPathLengthSampling() ||
 255             isSurfaceAreaSampling() ||
 256             isObjectSpaceParaSampling() ||
 257             isObjectSpacePathSampling());
 258 }
 259
 260 inline int
 261 Mapdesc::isSampling( void )
 262 {
 263     return isRangeSampling() || isConstantSampling() || isDomainSampling();
 264 }
 265
 266 inline int
 267 Mapdesc::isCulling( void )
 268 {
 269     return ((culling_method != N_NOCULLING) ? 1 : 0);
 270 }
 271
 272 inline int
 273 Mapdesc::isBboxSubdividing( void )
 274 {
 275     return ((bbox_subdividing != N_NOBBOXSUBDIVISION) ? 1 : 0);
 276 }
 277 #endif /* __glumapdesc_h_ */