PostGIS  2.3.7dev-r@@SVN_REVISION@@
void lwgeom_add_bbox_deep ( LWGEOM lwgeom,
GBOX gbox 
)

Compute a box for geom and all sub-geometries, if not already computed.

Definition at line 624 of file lwgeom.c.

References LWGEOM::bbox, LWGEOM::flags, FLAGS_SET_BBOX, gbox_clone(), gbox_new(), LWCOLLECTION::geoms, lwgeom_calculate_gbox(), lwgeom_is_collection(), lwgeom_is_empty(), and LWCOLLECTION::ngeoms.

Referenced by geography_distance_knn(), and geography_distance_uncached().

625 {
626  if ( lwgeom_is_empty(lwgeom) ) return;
627 
628  FLAGS_SET_BBOX(lwgeom->flags, 1);
629 
630  if ( ! ( gbox || lwgeom->bbox ) )
631  {
632  lwgeom->bbox = gbox_new(lwgeom->flags);
633  lwgeom_calculate_gbox(lwgeom, lwgeom->bbox);
634  }
635  else if ( gbox && ! lwgeom->bbox )
636  {
637  lwgeom->bbox = gbox_clone(gbox);
638  }
639 
640  if ( lwgeom_is_collection(lwgeom) )
641  {
642  int i;
643  LWCOLLECTION *lwcol = (LWCOLLECTION*)lwgeom;
644 
645  for ( i = 0; i < lwcol->ngeoms; i++ )
646  {
647  lwgeom_add_bbox_deep(lwcol->geoms[i], lwgeom->bbox);
648  }
649  }
650 }
GBOX * gbox_new(uint8_t flags)
Create a new gbox with the dimensionality indicated by the flags.
Definition: g_box.c:43
GBOX * bbox
Definition: liblwgeom.h:397
void lwgeom_add_bbox_deep(LWGEOM *lwgeom, GBOX *gbox)
Compute a box for geom and all sub-geometries, if not already computed.
Definition: lwgeom.c:624
uint8_t flags
Definition: liblwgeom.h:396
LWGEOM ** geoms
Definition: liblwgeom.h:508
int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members) ...
Definition: lwgeom.c:1310
#define FLAGS_SET_BBOX(flags, value)
Definition: liblwgeom.h:147
int lwgeom_is_collection(const LWGEOM *geom)
Determine whether a LWGEOM can contain sub-geometries or not.
Definition: lwgeom.c:1004
int lwgeom_calculate_gbox(const LWGEOM *lwgeom, GBOX *gbox)
Calculate the gbox for this goemetry, a cartesian box or geodetic box, depending on how it is flagged...
Definition: lwgeom.c:665
GBOX * gbox_clone(const GBOX *gbox)
Definition: g_box.c:56

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