PostGIS  2.3.7dev-r@@SVN_REVISION@@
int getPoint4d_p ( const POINTARRAY pa,
int  n,
POINT4D point 
)

Definition at line 244 of file lwgeom_api.c.

References POINTARRAY::flags, FLAGS_GET_ZM, getPoint_internal(), LWDEBUG, LWDEBUGF, lwerror(), POINT4D::m, NO_M_VALUE, NO_Z_VALUE, POINTARRAY::npoints, and POINT4D::z.

Referenced by _lwt_AddLineEdge(), _lwt_EdgeMotionArea(), circstring_from_pa(), getPoint4d(), linestring_from_pa(), lwcircstring_calculate_gbox_cartesian(), lwcircstring_stroke(), lwcompound_add_lwgeom(), lwcompound_stroke(), LWGEOM_dumppoints(), LWGEOM_line_interpolate_point(), LWGEOM_setpoint_linestring(), LWGEOM_snaptogrid_pointoff(), lwgeom_wrapx(), lwline_add_lwpoint(), lwline_clip_to_ordinate_range(), lwline_from_lwmpoint(), lwline_simplify(), lwline_split_by_point_to(), lwmpoint_construct(), lwpoint_get_m(), lwpoint_get_x(), lwpoint_get_y(), lwpoint_get_z(), lwpoint_getPoint4d_p(), lwpointiterator_peek(), lwpoly_from_twkb_state(), lwpsurface_is_closed(), lwt_AddPoint(), lwtin_is_closed(), parse_kml_polygon(), pointArray_toX3D3(), printPA(), pta_unstroke(), ptarray_affine(), ptarray_append_point(), ptarray_calculate_gbox_cartesian(), ptarray_collect_mvals(), ptarray_flip_coordinates(), ptarray_force_dims(), ptarray_force_geodetic(), ptarray_grid(), ptarray_length_spheroid(), ptarray_locate_along(), ptarray_locate_along_linear(), ptarray_locate_between_m(), ptarray_locate_point(), ptarray_nudge_geodetic(), ptarray_scale(), ptarray_segmentize2d(), ptarray_segmentize_sphere(), ptarray_simplify(), ptarray_startpoint(), ptarray_substring(), ptarray_swap_ordinates(), ptarray_to_kml2_sb(), ptarray_transform(), RTreeCreateLeafNode(), ST_Scale(), test_raster_convex_hull(), and test_raster_envelope_geom().

245 {
246  uint8_t *ptr;
247  int zmflag;
248 
249 #if PARANOIA_LEVEL > 0
250  if ( ! pa ) lwerror("getPoint4d_p: NULL pointarray");
251 
252  if ( (n<0) || (n>=pa->npoints))
253  {
254  lwerror("getPoint4d_p: point offset out of range");
255  }
256 #endif
257 
258  LWDEBUG(4, "getPoint4d_p called.");
259 
260  /* Get a pointer to nth point offset and zmflag */
261  ptr=getPoint_internal(pa, n);
262  zmflag=FLAGS_GET_ZM(pa->flags);
263 
264  LWDEBUGF(4, "ptr %p, zmflag %d", ptr, zmflag);
265 
266  switch (zmflag)
267  {
268  case 0: /* 2d */
269  memcpy(op, ptr, sizeof(POINT2D));
270  op->m=NO_M_VALUE;
271  op->z=NO_Z_VALUE;
272  break;
273 
274  case 3: /* ZM */
275  memcpy(op, ptr, sizeof(POINT4D));
276  break;
277 
278  case 2: /* Z */
279  memcpy(op, ptr, sizeof(POINT3DZ));
280  op->m=NO_M_VALUE;
281  break;
282 
283  case 1: /* M */
284  memcpy(op, ptr, sizeof(POINT3DM));
285  op->m=op->z; /* we use Z as temporary storage */
286  op->z=NO_Z_VALUE;
287  break;
288 
289  default:
290  lwerror("Unknown ZM flag ??");
291  }
292  return 1;
293 
294 }
int npoints
Definition: liblwgeom.h:370
#define FLAGS_GET_ZM(flags)
Definition: liblwgeom.h:152
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:83
uint8_t flags
Definition: liblwgeom.h:368
uint8_t * getPoint_internal(const POINTARRAY *pa, int n)
Definition: ptarray.c:1706
#define NO_Z_VALUE
#define NO_M_VALUE
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:102

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