src/glu/sgi/libnurbs/internals/mapdesc.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  * mapdesc.h
  33  *
  34  */
  35
  36 #ifndef __glumapdesc_h_
  37 #define __glumapdesc_h_
  38
  39 #include "mystdio.h"
  40 #include "types.h"
  41 #include "defines.h"
  42 #include "bufpool.h"
  43 #include "nurbsconsts.h"
  44
  45 typedef REAL Maxmatrix[MAXCOORDS][MAXCOORDS];
  46
  47 class Backend;
  48
  49 class Mapdesc : public PooledObj {
  50     friend class Maplist;
  51
  52 public:
  53                         Mapdesc( long, int, int, Backend & );
  54     int                 isProperty( long );
  55     REAL                getProperty( long );
  56     void                setProperty( long, REAL );
  57     int                 isConstantSampling( void );
  58     int                 isDomainSampling( void );
  59     int                 isRangeSampling( void );
  60     int                 isSampling( void );
  61     int                 isParametricDistanceSampling( void );
  62     int                 isObjectSpaceParaSampling( void );
  63     int                 isObjectSpacePathSampling( void );
  64     int                 isSurfaceAreaSampling( void );
  65     int                 isPathLengthSampling( void );
  66     int                 isCulling( void );
  67     int                 isBboxSubdividing( void );
  68     long                getType( void );
  69
  70     /* curve routines */
  71     void                subdivide( REAL *, REAL *, REAL, int, int );
  72     int                 cullCheck( REAL *, int, int );
  73     void                xformBounding( REAL *, int, int, REAL *, int );
  74     void                xformCulling( REAL *, int, int, REAL *, int );
  75     void                xformSampling( REAL *, int, int, REAL *, int );
  76     void                xformMat( Maxmatrix, REAL *, int, int, REAL *, int );
  77     REAL                calcPartialVelocity ( REAL *, int, int, int, REAL );
  78     int                 project( REAL *, int, REAL *, int, int );
  79     REAL                calcVelocityRational( REAL *, int, int );
  80     REAL                calcVelocityNonrational( REAL *, int, int );
  81
  82     /* surface routines */
  83     void                subdivide( REAL *, REAL *, REAL, int, int, int, int );
  84     int                 cullCheck( REAL *, int, int, int, int );
  85     void                xformBounding( REAL *, int, int, int, int, REAL *, int, int );
  86     void                xformCulling( REAL *, int, int, int, int, REAL *, int, int );
  87     void                xformSampling( REAL *, int, int, int, int, REAL *, int, int );
  88     void                xformMat( Maxmatrix, REAL *, int, int, int, int, REAL *, int, int );
  89     REAL                calcPartialVelocity ( REAL *, REAL *, int, int, int, int, int, int, REAL, REAL, int );
  90     int                 project( REAL *, int, int, REAL *, int, int, int, int);
  91     void                surfbbox( REAL bb[2][MAXCOORDS] );
  92
  93     int                 bboxTooBig( REAL *, int, int, int, int, REAL [2][MAXCOORDS] );
  94     int                 xformAndCullCheck( REAL *, int, int, int, int );
  95
  96     void                identify( REAL[MAXCOORDS][MAXCOORDS] );
  97     void                setBboxsize( INREAL *);
  98     inline void         setBmat( INREAL*, long, long );
  99     inline void         setCmat( INREAL*, long, long );
 100     inline void         setSmat( INREAL*, long, long );
 101     inline int          isRational( void );
 102     inline int          getNcoords( void );
 103
 104     REAL                pixel_tolerance;    /* pathlength sampling tolerance */
 105     REAL                error_tolerance;    /* parametric error sampling tolerance*/
 106     REAL                object_space_error_tolerance;    /* object space tess*/
 107     REAL                clampfactor;
 108     REAL                minsavings;
 109     REAL                maxrate;
 110     REAL                maxsrate;
 111     REAL                maxtrate;
 112     REAL                bboxsize[MAXCOORDS];
 113
 114 private:
 115     long                type;
 116     int                 isrational;
 117     int                 ncoords;
 118     int                 hcoords;
 119     int                 inhcoords;
 120     int                 mask;
 121     Maxmatrix           bmat;
 122     Maxmatrix           cmat;
 123     Maxmatrix           smat;
 124     REAL                s_steps;                /* max samples in s direction */
 125     REAL                t_steps;                /* max samples in t direction */
 126     REAL                sampling_method;
 127     REAL                culling_method;         /* check for culling */
 128     REAL                bbox_subdividing;
 129     Mapdesc *           next;
 130     Backend &           backend;
 131
 132     void                bbox( REAL [2][MAXCOORDS], REAL *, int, int, int, int );
 133     REAL                maxDifference( int, REAL *, int );
 134     static void         copy( Maxmatrix, long, INREAL *, long, long );
 135
 136     /* individual control point routines */
 137     static void         transform4d( float[4], float[4], float[4][4] );
 138     static void         multmatrix4d ( float[4][4], const float[4][4],
 139                                          const float[4][4] );
 140     void                copyPt( REAL *, REAL * );
 141     void                sumPt( REAL *, REAL *, REAL *, REAL, REAL );
 142     void                xformSampling( REAL *, REAL * );
 143     void                xformCulling( REAL *, REAL * );
 144     void                xformRational( Maxmatrix, REAL *, REAL * );
 145     void                xformNonrational( Maxmatrix, REAL *, REAL * );
 146     unsigned int        clipbits( REAL * );
 147 };
 148
 149 inline void
 150 Mapdesc::setBmat( INREAL *mat, long rstride, long cstride )
 151 {
 152     copy( bmat, hcoords, mat, rstride, cstride );
 153 }
 154
 155 inline void
 156 Mapdesc::setCmat( INREAL *mat, long rstride, long cstride )
 157 {
 158     copy( cmat, hcoords, mat, rstride, cstride );
 159 }
 160
 161 inline void
 162 Mapdesc::setSmat( INREAL *mat, long rstride, long cstride )
 163 {
 164     copy( smat, hcoords, mat, rstride, cstride );
 165 }
 166
 167 inline long
 168 Mapdesc::getType( void )
 169 {
 170     return type;
 171 }
 172
 173 inline void
 174 Mapdesc::xformCulling( REAL *d, REAL *s )
 175 {
 176     if( isrational )
 177         xformRational( cmat, d, s );
 178     else
 179         xformNonrational( cmat, d, s );
 180 }
 181
 182 inline void
 183 Mapdesc::xformSampling( REAL *d, REAL *s )
 184 {
 185     if( isrational )
 186         xformRational( smat, d, s );
 187     else
 188         xformNonrational( smat, d, s );
 189 }
 190
 191 inline int
 192 Mapdesc::isRational( void )
 193 {
 194     return isrational ? 1 : 0;
 195 }
 196
 197 inline int
 198 Mapdesc::getNcoords( void )
 199 {
 200     return ncoords;
 201 }
 202
 203 inline int
 204 Mapdesc::isConstantSampling( void )
 205 {
 206     return ((sampling_method == N_FIXEDRATE) ? 1 : 0);
 207 }
 208
 209 inline int
 210 Mapdesc::isDomainSampling( void )
 211 {
 212     return ((sampling_method == N_DOMAINDISTANCE) ? 1 : 0);
 213 }
 214
 215 inline int
 216 Mapdesc::isParametricDistanceSampling( void )
 217 {
 218     return ((sampling_method == N_PARAMETRICDISTANCE) ? 1 : 0);
 219 }
 220
 221 inline int
 222 Mapdesc::isObjectSpaceParaSampling( void )
 223 {
 224     return ((sampling_method == N_OBJECTSPACE_PARA) ? 1 : 0);
 225 }
 226
 227 inline int
 228 Mapdesc::isObjectSpacePathSampling( void )
 229 {
 230     return ((sampling_method == N_OBJECTSPACE_PATH) ? 1 : 0);
 231 }
 232
 233 inline int
 234 Mapdesc::isSurfaceAreaSampling( void )
 235 {
 236     return ((sampling_method == N_SURFACEAREA) ? 1 : 0);
 237 }
 238
 239 inline int
 240 Mapdesc::isPathLengthSampling( void )
 241 {
 242     return ((sampling_method == N_PATHLENGTH) ? 1 : 0);
 243 }
 244
 245 inline int
 246 Mapdesc::isRangeSampling( void )
 247 {
 248     return ( isParametricDistanceSampling() || isPathLengthSampling() ||
 249             isSurfaceAreaSampling() ||
 250             isObjectSpaceParaSampling() ||
 251             isObjectSpacePathSampling());
 252 }
 253
 254 inline int
 255 Mapdesc::isSampling( void )
 256 {
 257     return isRangeSampling() || isConstantSampling() || isDomainSampling();
 258 }
 259
 260 inline int
 261 Mapdesc::isCulling( void )
 262 {
 263     return ((culling_method != N_NOCULLING) ? 1 : 0);
 264 }
 265
 266 inline int
 267 Mapdesc::isBboxSubdividing( void )
 268 {
 269     return ((bbox_subdividing != N_NOBBOXSUBDIVISION) ? 1 : 0);
 270 }
 271 #endif /* __glumapdesc_h_ */