PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ disjoint()

Datum disjoint ( PG_FUNCTION_ARGS  )

Definition at line 2525 of file postgis/lwgeom_geos.c.

2526 {
2527  GSERIALIZED *geom1;
2528  GSERIALIZED *geom2;
2529  GEOSGeometry *g1, *g2;
2530  char result;
2531  GBOX box1, box2;
2532 
2533  geom1 = PG_GETARG_GSERIALIZED_P(0);
2534  geom2 = PG_GETARG_GSERIALIZED_P(1);
2535  gserialized_error_if_srid_mismatch(geom1, geom2, __func__);
2536 
2537  /* A.Disjoint(Empty) == TRUE */
2538  if ( gserialized_is_empty(geom1) || gserialized_is_empty(geom2) )
2539  PG_RETURN_BOOL(true);
2540 
2541  /*
2542  * short-circuit 1: if geom2 bounding box does not overlap
2543  * geom1 bounding box we can return TRUE.
2544  */
2545  if ( gserialized_get_gbox_p(geom1, &box1) &&
2546  gserialized_get_gbox_p(geom2, &box2) )
2547  {
2548  if ( gbox_overlaps_2d(&box1, &box2) == LW_FALSE )
2549  {
2550  PG_RETURN_BOOL(true);
2551  }
2552  }
2553 
2554  initGEOS(lwpgnotice, lwgeom_geos_error);
2555 
2556  g1 = POSTGIS2GEOS(geom1);
2557  if (!g1)
2558  HANDLE_GEOS_ERROR("First argument geometry could not be converted to GEOS");
2559 
2560  g2 = POSTGIS2GEOS(geom2);
2561  if (!g2)
2562  {
2563  GEOSGeom_destroy(g1);
2564  HANDLE_GEOS_ERROR("Second argument geometry could not be converted to GEOS");
2565  }
2566 
2567  result = GEOSDisjoint(g1,g2);
2568 
2569  GEOSGeom_destroy(g1);
2570  GEOSGeom_destroy(g2);
2571 
2572  if (result == 2) HANDLE_GEOS_ERROR("GEOSDisjoint");
2573 
2574  PG_FREE_IF_COPY(geom1, 0);
2575  PG_FREE_IF_COPY(geom2, 1);
2576 
2577  PG_RETURN_BOOL(result);
2578 }
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 LW_FALSE
Definition: liblwgeom.h:108
#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, LW_FALSE, lwgeom_geos_error(), POSTGIS2GEOS(), and result.

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