PostGIS  2.5.2dev-r@@SVN_REVISION@@

◆ getPoint3dz_p()

int getPoint3dz_p ( const POINTARRAY pa,
uint32_t  n,
POINT3DZ op 
)

Definition at line 215 of file lwgeom_api.c.

References POINTARRAY::flags, FLAGS_GET_Z, FLAGS_NDIMS, getPoint_internal(), LWDEBUGF, lwerror(), lwnotice(), NO_Z_VALUE, POINTARRAY::npoints, and POINT3DZ::z.

Referenced by BOX3D_construct(), define_plane(), getPoint3dz(), lw_dist3d_point_line(), lw_dist3d_point_point(), lw_dist3d_point_poly(), lw_dist3d_pt_ptarray(), lw_dist3d_ptarray_poly(), lw_dist3d_ptarray_ptarray(), LWGEOM_z_point(), lwline_measured_from_lwline(), lwpoint_getPoint3dz_p(), pt_in_ring_3d(), ptarray_length(), and ptarray_to_SFCGAL().

216 {
217  uint8_t *ptr;
218 
219  if ( ! pa )
220  {
221  lwerror("%s [%d] NULL POINTARRAY input", __FILE__, __LINE__);
222  return 0;
223  }
224 
225  if ( n>=pa->npoints )
226  {
227  lwnotice("%s [%d] called with n=%d and npoints=%d", __FILE__, __LINE__, n, pa->npoints);
228  return 0;
229  }
230 
231  LWDEBUGF(2, "getPoint3dz_p called on array of %d-dimensions / %u pts",
232  FLAGS_NDIMS(pa->flags), pa->npoints);
233 
234  /* Get a pointer to nth point offset */
235  ptr=getPoint_internal(pa, n);
236 
237  /*
238  * if input POINTARRAY has the Z, it is always
239  * at third position so make a single copy
240  */
241  if ( FLAGS_GET_Z(pa->flags) )
242  {
243  memcpy(op, ptr, sizeof(POINT3DZ));
244  }
245 
246  /*
247  * Otherwise copy the 2d part and initialize
248  * Z to NO_Z_VALUE
249  */
250  else
251  {
252  memcpy(op, ptr, sizeof(POINT2D));
253  op->z=NO_Z_VALUE;
254  }
255 
256  return 1;
257 
258 }
double z
Definition: liblwgeom.h:337
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
uint8_t flags
Definition: liblwgeom.h:372
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:140
#define NO_Z_VALUE
uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: ptarray.c:1750
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
#define FLAGS_NDIMS(flags)
Definition: liblwgeom.h:152
unsigned char uint8_t
Definition: uthash.h:79
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
uint32_t npoints
Definition: liblwgeom.h:374
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