PostGIS  3.4.0dev-r@@SVN_REVISION@@

◆ LWGEOM_force_2d()

Datum LWGEOM_force_2d ( PG_FUNCTION_ARGS  )

Definition at line 368 of file lwgeom_functions_basic.c.

369 {
370  GSERIALIZED *pg_geom_in = PG_GETARG_GSERIALIZED_P(0);
371  GSERIALIZED *pg_geom_out;
372  LWGEOM *lwg_in, *lwg_out;
373 
374  /* already 2d */
375  if (gserialized_ndims(pg_geom_in) == 2)
376  PG_RETURN_POINTER(pg_geom_in);
377 
378  lwg_in = lwgeom_from_gserialized(pg_geom_in);
379  lwg_out = lwgeom_force_2d(lwg_in);
380  pg_geom_out = geometry_serialize(lwg_out);
381  lwgeom_free(lwg_out);
382  lwgeom_free(lwg_in);
383 
384  PG_FREE_IF_COPY(pg_geom_in, 0);
385  PG_RETURN_POINTER(pg_geom_out);
386 }
gserialized_ndims
int gserialized_ndims(const GSERIALIZED *g)
Return the number of dimensions (2, 3, 4) in a geometry.
Definition: gserialized.c:207
lwgeom_from_gserialized
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition: gserialized.c:239
lwgeom_free
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1155
lwgeom_force_2d
LWGEOM * lwgeom_force_2d(const LWGEOM *geom)
Strip out the Z/M components of an LWGEOM.
Definition: lwgeom.c:793

References gserialized_ndims(), lwgeom_force_2d(), lwgeom_free(), and lwgeom_from_gserialized().

Here is the call graph for this function: