PostGIS  2.2.7dev-r@@SVN_REVISION@@
Datum sfcgal_approximate_medial_axis ( PG_FUNCTION_ARGS  )

Definition at line 427 of file postgis/lwgeom_sfcgal.c.

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

428 {
429 #if POSTGIS_SFCGAL_VERSION < 12
430  lwpgerror("The SFCGAL version this PostGIS binary "
431  "was compiled against (%d) doesn't support "
432  "'sfcgal_geometry_approximate_medial_axis' function (1.2.0+ required)",
434  PG_RETURN_NULL();
435 #else /* POSTGIS_SFCGAL_VERSION >= 12 */
436  GSERIALIZED *input, *output;
437  sfcgal_geometry_t *geom;
438  sfcgal_geometry_t *result;
439  srid_t srid;
440 
442 
443  input = PG_GETARG_GSERIALIZED_P(0);
444  srid = gserialized_get_srid(input);
445  geom = POSTGIS2SFCGALGeometry(input);
446  PG_FREE_IF_COPY(input, 0);
447 
448  result = sfcgal_geometry_approximate_medial_axis(geom);
449  sfcgal_geometry_delete(geom);
450 
451  output = SFCGALGeometry2POSTGIS(result, 0, srid);
452  sfcgal_geometry_delete(result);
453 
454  PG_RETURN_POINTER(output);
455 #endif /* POSTGIS_SFCGAL_VERSION >= 12 */
456 }
#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:69

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