PostGIS  3.0.6dev-r@@SVN_REVISION@@

◆ gserialized_distance_centroid_2d()

Datum gserialized_distance_centroid_2d ( PG_FUNCTION_ARGS  )

Definition at line 609 of file gserialized_gist_2d.c.

610 {
611  BOX2DF b1, b2;
612  Datum gs1 = PG_GETARG_DATUM(0);
613  Datum gs2 = PG_GETARG_DATUM(1);
614 
615  POSTGIS_DEBUG(3, "entered function");
616 
617  /* Must be able to build box for each argument (ie, not empty geometry). */
618  if ( (gserialized_datum_get_box2df_p(gs1, &b1) == LW_SUCCESS) &&
620  {
621  double distance = box2df_distance_leaf_centroid(&b1, &b2);
622  POSTGIS_DEBUGF(3, "got boxes %s and %s", box2df_to_string(&b1), box2df_to_string(&b2));
623  PG_RETURN_FLOAT8(distance);
624  }
625  PG_RETURN_FLOAT8(FLT_MAX);
626 }
static char * box2df_to_string(const BOX2DF *a)
static double box2df_distance_leaf_centroid(const BOX2DF *a, const BOX2DF *b)
Calculate the centroid->centroid distance between the boxes.
int gserialized_datum_get_box2df_p(Datum gsdatum, BOX2DF *box2df)
Peak into a GSERIALIZED datum to find the bounding box.
#define LW_SUCCESS
Definition: liblwgeom.h:111
static double distance(double x1, double y1, double x2, double y2)
Definition: lwtree.c:1032

References box2df_distance_leaf_centroid(), box2df_to_string(), distance(), gserialized_datum_get_box2df_p(), and LW_SUCCESS.

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