PostGIS  2.4.9dev-r@@SVN_REVISION@@

◆ lwline_from_lwmpoint()

LWLINE* lwline_from_lwmpoint ( int  srid,
const LWMPOINT mpoint 

Definition at line 290 of file lwline.c.

References LWMPOINT::geoms, getPoint4d_p(), LWDEBUGF, lwgeom_has_m(), lwgeom_has_z(), lwgeom_is_empty(), lwline_construct(), lwline_construct_empty(), LWMPOINT::ngeoms, LWPOINT::point, ptarray_construct(), and ptarray_set_point4d().

Referenced by encode_mpoint(), LWGEOM_line_from_mpoint(), lwmmpoint_to_encoded_polyline(), and test_lwline_from_lwmpoint().

291 {
292  uint32_t i;
294  LWGEOM *lwgeom = (LWGEOM*)mpoint;
295  POINT4D pt;
297  char hasz = lwgeom_has_z(lwgeom);
298  char hasm = lwgeom_has_m(lwgeom);
299  uint32_t npoints = mpoint->ngeoms;
301  if ( lwgeom_is_empty(lwgeom) )
302  {
303  return lwline_construct_empty(srid, hasz, hasm);
304  }
306  pa = ptarray_construct(hasz, hasm, npoints);
308  for (i=0; i < npoints; i++)
309  {
310  getPoint4d_p(mpoint->geoms[i]->point, 0, &pt);
311  ptarray_set_point4d(pa, i, &pt);
312  }
314  LWDEBUGF(3, "lwline_from_lwmpoint: constructed pointarray for %d points", mpoint->ngeoms);
316  return lwline_construct(srid, NULL, pa);
317 }
void ptarray_set_point4d(POINTARRAY *pa, int n, const POINT4D *p4d)
Definition: lwgeom_api.c:437
POINTARRAY * ptarray_construct(char hasz, char hasm, uint32_t npoints)
Construct an empty pointarray, allocating storage and setting the npoints, but not filling in any inf...
Definition: ptarray.c:62
LWLINE * lwline_construct_empty(int srid, char hasz, char hasm)
Definition: lwline.c:64
Definition: liblwgeom.h:411
int lwgeom_has_z(const LWGEOM *geom)
Return LW_TRUE if geometry has Z ordinates.
Definition: lwgeom.c:885
unsigned int uint32_t
Definition: uthash.h:78
LWPOINT ** geoms
Definition: liblwgeom.h:470
int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members) ...
Definition: lwgeom.c:1346
int ngeoms
Definition: liblwgeom.h:468
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:88
int lwgeom_has_m(const LWGEOM *geom)
Return LW_TRUE if geometry has M ordinates.
Definition: lwgeom.c:892
int getPoint4d_p(const POINTARRAY *pa, int n, POINT4D *point)
Definition: lwgeom_api.c:122
LWLINE * lwline_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwline.c:42
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