ST_ConcaveHull()

Datum ST_ConcaveHull

(

PG_FUNCTION_ARGS

)

Definition at line 824 of file postgis/lwgeom_geos.c.

{
#if POSTGIS_GEOS_VERSION < 31100
 
        lwpgerror("The GEOS version this PostGIS binary "
                                "was compiled against (%d) doesn't support "
                                "'GEOSConcaveHull' function (3.11.0+ required)",
                                POSTGIS_GEOS_VERSION);
        PG_RETURN_NULL();
 
#else /* POSTGIS_GEOS_VERSION >= 31100 */
        GSERIALIZED* geom = PG_GETARG_GSERIALIZED_P(0);
        double ratio = PG_GETARG_FLOAT8(1);
        bool allow_holes = PG_GETARG_BOOL(2);
 
        LWGEOM* lwgeom = lwgeom_from_gserialized(geom);
        LWGEOM* lwresult = lwgeom_concavehull(lwgeom, ratio, allow_holes);
        GSERIALIZED* result = geometry_serialize(lwresult);
 
        lwgeom_free(lwgeom);
        lwgeom_free(lwresult);
        PG_FREE_IF_COPY(geom, 0);
        PG_RETURN_POINTER(result);
#endif
}

References lwgeom_free(), lwgeom_from_gserialized(), POSTGIS_GEOS_VERSION, and result.

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