PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwgeom_unaryunion_prec()

LWGEOM* lwgeom_unaryunion_prec ( const LWGEOM geom1,
double  gridSize 
)

Definition at line 765 of file liblwgeom/lwgeom_geos.c.

766 {
767  LWGEOM* result;
768  int32_t srid = RESULT_SRID(geom);
769  uint8_t is3d = FLAGS_GET_Z(geom->flags);
770  GEOSGeometry* g1;
771  GEOSGeometry* g3;
772 
773  if (srid == SRID_INVALID) return NULL;
774 
775  /* Empty.UnaryUnion() == Empty */
776  if (lwgeom_is_empty(geom)) return lwgeom_clone_deep(geom);
777 
778  initGEOS(lwnotice, lwgeom_geos_error);
779 
780  if (!(g1 = LWGEOM2GEOS(geom, AUTOFIX))) GEOS_FAIL();
781 
782  if ( prec >= 0) {
783 #if POSTGIS_GEOS_VERSION < 39
784  lwerror("Fixed-precision union requires GEOS-3.9 or higher");
785  GEOS_FREE_AND_FAIL(g1);
786  return NULL;
787 #else
788  g3 = GEOSUnaryUnionPrec(g1, prec);
789 #endif
790  }
791  else
792  {
793  g3 = GEOSUnaryUnion(g1);
794  }
795 
796  if (!g3) GEOS_FREE_AND_FAIL(g1);
797  GEOSSetSRID(g3, srid);
798 
799  if (!(result = GEOS2LWGEOM(g3, is3d)))
800  GEOS_FREE_AND_FAIL(g1, g3);
801 
802  GEOS_FREE(g1, g3);
803 
804  return result;
805 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
#define GEOS_FREE(...)
#define AUTOFIX
#define RESULT_SRID(...)
#define GEOS_FAIL()
#define GEOS_FREE_AND_FAIL(...)
GEOSGeometry * LWGEOM2GEOS(const LWGEOM *lwgeom, uint8_t autofix)
LWGEOM * GEOS2LWGEOM(const GEOSGeometry *geom, uint8_t want3d)
void lwgeom_geos_error(const char *fmt,...)
#define SRID_INVALID
Definition: liblwgeom.h:233
LWGEOM * lwgeom_clone_deep(const LWGEOM *lwgeom)
Deep clone an LWGEOM, everything is copied.
Definition: lwgeom.c:512
#define FLAGS_GET_Z(flags)
Definition: liblwgeom.h:179
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
static int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)
Definition: lwinline.h:203

References AUTOFIX, LWGEOM::flags, FLAGS_GET_Z, GEOS2LWGEOM(), GEOS_FAIL, GEOS_FREE, GEOS_FREE_AND_FAIL, lwerror(), LWGEOM2GEOS(), lwgeom_clone_deep(), lwgeom_geos_error(), lwgeom_is_empty(), lwnotice(), result, RESULT_SRID, and SRID_INVALID.

Referenced by lwgeom_unaryunion(), pgis_geometry_union_finalfn(), and ST_UnaryUnion().

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