PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ disjoint()

Datum disjoint ( PG_FUNCTION_ARGS  )

Definition at line 2328 of file postgis/lwgeom_geos.c.

References error_if_srid_mismatch(), errorIfGeometryCollection(), gbox_overlaps_2d(), gserialized_get_gbox_p(), gserialized_get_srid(), gserialized_is_empty(), HANDLE_GEOS_ERROR, LW_FALSE, lwgeom_geos_error(), PG_FUNCTION_INFO_V1(), POSTGIS2GEOS(), and relate_pattern().

Referenced by touches().

2329 {
2330  GSERIALIZED *geom1;
2331  GSERIALIZED *geom2;
2332  GEOSGeometry *g1, *g2;
2333  char result;
2334  GBOX box1, box2;
2335 
2336  geom1 = PG_GETARG_GSERIALIZED_P(0);
2337  geom2 = PG_GETARG_GSERIALIZED_P(1);
2338 
2339  errorIfGeometryCollection(geom1,geom2);
2341 
2342  /* A.Disjoint(Empty) == TRUE */
2343  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
2344  PG_RETURN_BOOL(true);
2345 
2346  /*
2347  * short-circuit 1: if geom2 bounding box does not overlap
2348  * geom1 bounding box we can return TRUE.
2349  */
2350  if ( gserialized_get_gbox_p(geom1, &box1) &&
2351  gserialized_get_gbox_p(geom2, &box2) )
2352  {
2353  if ( gbox_overlaps_2d(&box1, &box2) == LW_FALSE )
2354  {
2355  PG_RETURN_BOOL(true);
2356  }
2357  }
2358 
2359  initGEOS(lwpgnotice, lwgeom_geos_error);
2360 
2361  g1 = POSTGIS2GEOS(geom1);
2362  if (!g1)
2363  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
2364 
2365  g2 = POSTGIS2GEOS(geom2);
2366  if (!g2)
2367  {
2368  GEOSGeom_destroy(g1);
2369  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
2370  }
2371 
2372  result = GEOSDisjoint(g1,g2);
2373 
2374  GEOSGeom_destroy(g1);
2375  GEOSGeom_destroy(g2);
2376 
2377  if (result == 2) HANDLE_GEOS_ERROR("GEOSDisjoint");
2378 
2379  PG_FREE_IF_COPY(geom1, 0);
2380  PG_FREE_IF_COPY(geom2, 1);
2381 
2382  PG_RETURN_BOOL(result);
2383 }
int gserialized_get_gbox_p(const GSERIALIZED *g, GBOX *box)
Read the bounding box off a serialization and calculate one if it is not already there.
Definition: g_serialized.c:639
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int gserialized_is_empty(const GSERIALIZED *g)
Check if a GSERIALIZED is empty without deserializing first.
Definition: g_serialized.c:178
void lwgeom_geos_error(const char *fmt,...)
#define LW_FALSE
Definition: liblwgeom.h:76
int gbox_overlaps_2d(const GBOX *g1, const GBOX *g2)
Return LW_TRUE if the GBOX overlaps on the 2d plane, LW_FALSE otherwise.
Definition: g_box.c:330
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
#define HANDLE_GEOS_ERROR(label)
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:99
void errorIfGeometryCollection(GSERIALIZED *g1, GSERIALIZED *g2)
Throws an ereport ERROR if either geometry is a COLLECTIONTYPE.
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