LWGEOM_mindistance2d()

Datum LWGEOM_mindistance2d

(

PG_FUNCTION_ARGS

)

Definition at line 697 of file lwgeom_functions_basic.c.

References error_if_srid_mismatch(), LWGEOM_dwithin(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_mindistance2d(), PG_FUNCTION_INFO_V1(), and LWGEOM::srid.

Referenced by LWGEOM_longestline2d(), and optimistic_overlap().

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

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

        mindist = lwgeom_mindistance2d(lwgeom1, lwgeom2);

        lwgeom_free(lwgeom1);
        lwgeom_free(lwgeom2);

        PG_FREE_IF_COPY(geom1, 0);
        PG_FREE_IF_COPY(geom2, 1);

        /*if called with empty geometries the ingoing mindistance is untouched, and makes us return NULL*/
        if (mindist<FLT_MAX)
                PG_RETURN_FLOAT8(mindist);

        PG_RETURN_NULL();
}

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