ST_DistanceRectTree()

Datum ST_DistanceRectTree

(

PG_FUNCTION_ARGS

)

Definition at line 120 of file lwgeom_rectree.c.

{
        GSERIALIZED *g1 = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *g2 = PG_GETARG_GSERIALIZED_P(1);
        LWGEOM *lwg1, *lwg2;
        RECT_NODE *n1, *n2;
 
        /* Return NULL on empty arguments. */
        if (gserialized_is_empty(g1) || gserialized_is_empty(g2))
        {
                PG_FREE_IF_COPY(g1, 0);
                PG_FREE_IF_COPY(g2, 1);
                PG_RETURN_NULL();
        }
 
        lwg1 = lwgeom_from_gserialized(g1);
        lwg2 = lwgeom_from_gserialized(g2);
 
        /* Two points? Get outa here... */
        if (lwg1->type == POINTTYPE && lwg2->type == POINTTYPE)
                PG_RETURN_FLOAT8(lwgeom_mindistance2d(lwg1, lwg2));
 
 
        n1 = rect_tree_from_lwgeom(lwg1);
        n2 = rect_tree_from_lwgeom(lwg2);
        PG_RETURN_FLOAT8(rect_tree_distance_tree(n1, n2, 0.0));
}

References gserialized_is_empty(), lwgeom_from_gserialized(), lwgeom_mindistance2d(), POINTTYPE, rect_tree_distance_tree(), rect_tree_from_lwgeom(), and LWGEOM::type.

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