PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ overlaps()

Datum overlaps ( PG_FUNCTION_ARGS  )

Definition at line 1784 of file postgis/lwgeom_geos.c.

1785 {
1786  GSERIALIZED *geom1;
1787  GSERIALIZED *geom2;
1788  GEOSGeometry *g1, *g2;
1789  char result;
1790  GBOX box1, box2;
1791 
1792  geom1 = PG_GETARG_GSERIALIZED_P(0);
1793  geom2 = PG_GETARG_GSERIALIZED_P(1);
1794  gserialized_error_if_srid_mismatch(geom1, geom2, __func__);
1795 
1796  /* A.Overlaps(Empty) == FALSE */
1797  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
1798  PG_RETURN_BOOL(false);
1799 
1800  /*
1801  * short-circuit 1: if geom2 bounding box does not overlap
1802  * geom1 bounding box we can return FALSE.
1803  */
1804  if ( gserialized_get_gbox_p(geom1, &box1) &&
1805  gserialized_get_gbox_p(geom2, &box2) )
1806  {
1807  if ( ! gbox_overlaps_2d(&box1, &box2) )
1808  {
1809  PG_RETURN_BOOL(false);
1810  }
1811  }
1812 
1813  initGEOS(lwpgnotice, lwgeom_geos_error);
1814 
1815  g1 = POSTGIS2GEOS(geom1);
1816  if (!g1)
1817  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
1818 
1819  g2 = POSTGIS2GEOS(geom2);
1820 
1821  if (!g2)
1822  {
1823  GEOSGeom_destroy(g1);
1824  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
1825  }
1826 
1827  result = GEOSOverlaps(g1,g2);
1828 
1829  GEOSGeom_destroy(g1);
1830  GEOSGeom_destroy(g2);
1831  if (result == 2) HANDLE_GEOS_ERROR("GEOSOverlaps");
1832 
1833  PG_FREE_IF_COPY(geom1, 0);
1834  PG_FREE_IF_COPY(geom2, 1);
1835 
1836  PG_RETURN_BOOL(result);
1837 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
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: gbox.c:323
void gserialized_error_if_srid_mismatch(const GSERIALIZED *g1, const GSERIALIZED *g2, const char *funcname)
Definition: gserialized.c:404
int gserialized_get_gbox_p(const GSERIALIZED *g, GBOX *gbox)
Read the box from the GSERIALIZED or calculate it if necessary.
Definition: gserialized.c:65
int gserialized_is_empty(const GSERIALIZED *g)
Check if a GSERIALIZED is empty without deserializing first.
Definition: gserialized.c:152
void lwgeom_geos_error(const char *fmt,...)
#define HANDLE_GEOS_ERROR(label)
GEOSGeometry * POSTGIS2GEOS(const GSERIALIZED *pglwgeom)

References gbox_overlaps_2d(), gserialized_error_if_srid_mismatch(), gserialized_get_gbox_p(), gserialized_is_empty(), HANDLE_GEOS_ERROR, lwgeom_geos_error(), POSTGIS2GEOS(), and result.

Referenced by rt_raster_overlaps().

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