LWGEOM_shortestline2d()

Datum LWGEOM_shortestline2d

(

PG_FUNCTION_ARGS

)

Definition at line 638 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), geometry_serialize(), lwgeom_closest_line(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_empty(), LWGEOM_longestline2d(), PG_FUNCTION_INFO_V1(), and LWGEOM::srid.

Referenced by LWGEOM_closestpoint().

{
        GSERIALIZED *result;
        GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
        LWGEOM *theline;
        LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
        LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);

        error_if_srid_mismatch(lwgeom1->srid, lwgeom2->srid);

        theline = lwgeom_closest_line(lwgeom1, lwgeom2);

        if (lwgeom_is_empty(theline))
                PG_RETURN_NULL();

        result = geometry_serialize(theline);
        lwgeom_free(theline);
        lwgeom_free(lwgeom1);
        lwgeom_free(lwgeom2);

        PG_FREE_IF_COPY(geom1, 0);
        PG_FREE_IF_COPY(geom2, 1);
        PG_RETURN_POINTER(result);
}

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