PostGIS  2.1.10dev-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 567 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_uncached().

568 {
569  if ( lwgeom_is_empty(lwgeom) ) return;
570 
571  FLAGS_SET_BBOX(lwgeom->flags, 1);
572 
573  if ( ! ( gbox || lwgeom->bbox ) )
574  {
575  lwgeom->bbox = gbox_new(lwgeom->flags);
576  lwgeom_calculate_gbox(lwgeom, lwgeom->bbox);
577  }
578  else if ( gbox && ! lwgeom->bbox )
579  {
580  lwgeom->bbox = gbox_clone(gbox);
581  }
582 
583  if ( lwgeom_is_collection(lwgeom) )
584  {
585  int i;
586  LWCOLLECTION *lwcol = (LWCOLLECTION*)lwgeom;
587 
588  for ( i = 0; i < lwcol->ngeoms; i++ )
589  {
590  lwgeom_add_bbox_deep(lwcol->geoms[i], lwgeom->bbox);
591  }
592  }
593 }
GBOX * gbox_new(uint8_t flags)
Create a new gbox with the dimensionality indicated by the flags.
Definition: g_box.c:26
GBOX * bbox
Definition: liblwgeom.h:354
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:567
uint8_t flags
Definition: liblwgeom.h:353
LWGEOM ** geoms
Definition: liblwgeom.h:465
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:1229
#define FLAGS_SET_BBOX(flags, value)
Definition: liblwgeom.h:114
int lwgeom_is_collection(const LWGEOM *geom)
Determine whether a LWGEOM can contain sub-geometries or not.
Definition: lwgeom.c:947
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:608
GBOX * gbox_clone(const GBOX *gbox)
Definition: g_box.c:39

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