PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ sfcgal_approximate_medial_axis()

Datum sfcgal_approximate_medial_axis ( PG_FUNCTION_ARGS  )

Definition at line 438 of file postgis/lwgeom_sfcgal.c.

References gserialized_get_srid(), PG_FUNCTION_INFO_V1(), POSTGIS2SFCGALGeometry(), POSTGIS_SFCGAL_VERSION, sfcgal_intersection(), sfcgal_postgis_init(), and SFCGALGeometry2POSTGIS().

Referenced by sfcgal_straight_skeleton().

439 {
440 #if POSTGIS_SFCGAL_VERSION < 12
441  lwpgerror("The SFCGAL version this PostGIS binary "
442  "was compiled against (%d) doesn't support "
443  "'sfcgal_geometry_approximate_medial_axis' function (1.2.0+ required)",
445  PG_RETURN_NULL();
446 #else /* POSTGIS_SFCGAL_VERSION >= 12 */
447  GSERIALIZED *input, *output;
448  sfcgal_geometry_t *geom;
449  sfcgal_geometry_t *result;
450  srid_t srid;
451 
453 
454  input = PG_GETARG_GSERIALIZED_P(0);
455  srid = gserialized_get_srid(input);
456  geom = POSTGIS2SFCGALGeometry(input);
457  PG_FREE_IF_COPY(input, 0);
458 
459  result = sfcgal_geometry_approximate_medial_axis(geom);
460  sfcgal_geometry_delete(geom);
461 
462  output = SFCGALGeometry2POSTGIS(result, 0, srid);
463  sfcgal_geometry_delete(result);
464 
465  PG_RETURN_POINTER(output);
466 #endif /* POSTGIS_SFCGAL_VERSION >= 12 */
467 }
#define POSTGIS_SFCGAL_VERSION
Definition: sqldefines.h:14
sfcgal_geometry_t * POSTGIS2SFCGALGeometry(GSERIALIZED *pglwgeom)
GSERIALIZED * SFCGALGeometry2POSTGIS(const sfcgal_geometry_t *geom, int force3D, int SRID)
void sfcgal_postgis_init(void)
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:83
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