PostGIS  2.5.0beta2dev-r@@SVN_REVISION@@

◆ disjoint()

Datum disjoint ( PG_FUNCTION_ARGS  )

Definition at line 2329 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().

2330 {
2331  GSERIALIZED *geom1;
2332  GSERIALIZED *geom2;
2333  GEOSGeometry *g1, *g2;
2334  char result;
2335  GBOX box1, box2;
2336 
2337  geom1 = PG_GETARG_GSERIALIZED_P(0);
2338  geom2 = PG_GETARG_GSERIALIZED_P(1);
2339 
2340  errorIfGeometryCollection(geom1,geom2);
2342 
2343  /* A.Disjoint(Empty) == TRUE */
2344  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
2345  PG_RETURN_BOOL(true);
2346 
2347  /*
2348  * short-circuit 1: if geom2 bounding box does not overlap
2349  * geom1 bounding box we can return TRUE.
2350  */
2351  if ( gserialized_get_gbox_p(geom1, &box1) &&
2352  gserialized_get_gbox_p(geom2, &box2) )
2353  {
2354  if ( gbox_overlaps_2d(&box1, &box2) == LW_FALSE )
2355  {
2356  PG_RETURN_BOOL(true);
2357  }
2358  }
2359 
2360  initGEOS(lwpgnotice, lwgeom_geos_error);
2361 
2362  g1 = POSTGIS2GEOS(geom1);
2363  if (!g1)
2364  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
2365 
2366  g2 = POSTGIS2GEOS(geom2);
2367  if (!g2)
2368  {
2369  GEOSGeom_destroy(g1);
2370  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
2371  }
2372 
2373  result = GEOSDisjoint(g1,g2);
2374 
2375  GEOSGeom_destroy(g1);
2376  GEOSGeom_destroy(g2);
2377 
2378  if (result == 2) HANDLE_GEOS_ERROR("GEOSDisjoint");
2379 
2380  PG_FREE_IF_COPY(geom1, 0);
2381  PG_FREE_IF_COPY(geom2, 1);
2382 
2383  PG_RETURN_BOOL(result);
2384 }
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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