LWGEOM_closestpoint()

Datum LWGEOM_closestpoint

(

PG_FUNCTION_ARGS

)

Definition at line 612 of file lwgeom_functions_basic.c.

{
        GSERIALIZED *result;
        GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
        LWGEOM *point;
        LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
        LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
 
        error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);
 
        point = lwgeom_closest_point(lwgeom1, lwgeom2);
 
        if (lwgeom_is_empty(point))
                PG_RETURN_NULL();
 
        result = geometry_serialize(point);
        lwgeom_free(point);
        lwgeom_free(lwgeom1);
        lwgeom_free(lwgeom2);
 
        PG_FREE_IF_COPY(geom1, 0);
        PG_FREE_IF_COPY(geom2, 1);
        PG_RETURN_POINTER(result);
}

References error_if_srid_mismatch(), geometry_serialize(), lwgeom_closest_point(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_empty(), and LWGEOM::srid.

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