ST_MinimumClearance()

Datum ST_MinimumClearance

(

PG_FUNCTION_ARGS

)

Definition at line 3391 of file postgis/lwgeom_geos.c.

{
#if POSTGIS_GEOS_VERSION < 36
        lwpgerror("The GEOS version this PostGIS binary "
                "was compiled against (%d) doesn't support "
                "'ST_MinimumClearance' function (3.6.0+ required)",
                POSTGIS_GEOS_VERSION);
        PG_RETURN_NULL();
#else /* POSTGIS_GEOS_VERSION >= 36 */
        GSERIALIZED* input;
        GEOSGeometry* input_geos;
        int error;
        double result;
 
        initGEOS(lwpgnotice, lwgeom_geos_error);
 
        input = PG_GETARG_GSERIALIZED_P(0);
        input_geos = POSTGIS2GEOS(input);
        if (!input_geos)
                HANDLE_GEOS_ERROR("Geometry could not be converted to GEOS");
 
        error = GEOSMinimumClearance(input_geos, &result);
        GEOSGeom_destroy(input_geos);
        if (error) HANDLE_GEOS_ERROR("Error computing minimum clearance");
 
        PG_FREE_IF_COPY(input, 0);
        PG_RETURN_FLOAT8(result);
#endif
}

References HANDLE_GEOS_ERROR, lwgeom_geos_error(), POSTGIS2GEOS(), and POSTGIS_GEOS_VERSION.

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