PostGIS  2.5.0dev-r@@SVN_REVISION@@

◆ overlaps()

Datum overlaps ( PG_FUNCTION_ARGS  )

Definition at line 1711 of file postgis/lwgeom_geos.c.

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

Referenced by isvaliddetail().

1712 {
1713  GSERIALIZED *geom1;
1714  GSERIALIZED *geom2;
1715  GEOSGeometry *g1, *g2;
1716  bool result;
1717  GBOX box1, box2;
1718 
1719  geom1 = PG_GETARG_GSERIALIZED_P(0);
1720  geom2 = PG_GETARG_GSERIALIZED_P(1);
1721 
1722  errorIfGeometryCollection(geom1,geom2);
1724 
1725  /* A.Overlaps(Empty) == FALSE */
1726  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
1727  PG_RETURN_BOOL(false);
1728 
1729  /*
1730  * short-circuit 1: if geom2 bounding box does not overlap
1731  * geom1 bounding box we can prematurely return FALSE.
1732  */
1733  if ( gserialized_get_gbox_p(geom1, &box1) &&
1734  gserialized_get_gbox_p(geom2, &box2) )
1735  {
1736  if ( ! gbox_overlaps_2d(&box1, &box2) )
1737  {
1738  PG_RETURN_BOOL(false);
1739  }
1740  }
1741 
1742  initGEOS(lwpgnotice, lwgeom_geos_error);
1743 
1744  g1 = POSTGIS2GEOS(geom1);
1745  if (!g1)
1746  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
1747 
1748  g2 = POSTGIS2GEOS(geom2);
1749 
1750  if (!g2)
1751  {
1752  GEOSGeom_destroy(g1);
1753  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
1754  }
1755 
1756  result = GEOSOverlaps(g1,g2);
1757 
1758  GEOSGeom_destroy(g1);
1759  GEOSGeom_destroy(g2);
1760  if (result == 2) HANDLE_GEOS_ERROR("GEOSOverlaps");
1761 
1762  PG_FREE_IF_COPY(geom1, 0);
1763  PG_FREE_IF_COPY(geom2, 1);
1764 
1765  PG_RETURN_BOOL(result);
1766 }
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,...)
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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