PostGIS  2.5.0dev-r@@SVN_REVISION@@

◆ getPoint3dz_p()

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

Definition at line 205 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().

206 {
207  uint8_t *ptr;
208 
209  if ( ! pa )
210  {
211  lwerror("%s [%d] NULL POINTARRAY input", __FILE__, __LINE__);
212  return 0;
213  }
214 
215  if ( n>=pa->npoints )
216  {
217  lwnotice("%s [%d] called with n=%d and npoints=%d", __FILE__, __LINE__, n, pa->npoints);
218  return 0;
219  }
220 
221  LWDEBUGF(2, "getPoint3dz_p called on array of %d-dimensions / %u pts",
222  FLAGS_NDIMS(pa->flags), pa->npoints);
223 
224  /* Get a pointer to nth point offset */
225  ptr=getPoint_internal(pa, n);
226 
227  /*
228  * if input POINTARRAY has the Z, it is always
229  * at third position so make a single copy
230  */
231  if ( FLAGS_GET_Z(pa->flags) )
232  {
233  memcpy(op, ptr, sizeof(POINT3DZ));
234  }
235 
236  /*
237  * Otherwise copy the 2d part and initialize
238  * Z to NO_Z_VALUE
239  */
240  else
241  {
242  memcpy(op, ptr, sizeof(POINT2D));
243  op->z=NO_Z_VALUE;
244  }
245 
246  return 1;
247 
248 }
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
uint8_t flags
Definition: liblwgeom.h:371
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:139
#define NO_Z_VALUE
uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: ptarray.c:1743
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
#define FLAGS_NDIMS(flags)
Definition: liblwgeom.h:151
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:373
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