ST_GeneratePoints()

Datum ST_GeneratePoints

(

PG_FUNCTION_ARGS

)

Definition at line 1127 of file postgis/lwgeom_geos.c.

{
        GSERIALIZED     *gser_input;
        GSERIALIZED *gser_result;
        LWGEOM *lwgeom_input;
        LWGEOM *lwgeom_result;
        int32 npoints;
        int32 seed = 0;
 
        gser_input = PG_GETARG_GSERIALIZED_P(0);
        npoints = PG_GETARG_INT32(1);
 
        if (npoints < 0)
                PG_RETURN_NULL();
 
        if (PG_NARGS() > 2 && ! PG_ARGISNULL(2))
        {
                seed = PG_GETARG_INT32(2);
                if (seed < 1)
                {
                        lwpgerror("ST_GeneratePoints: seed must be greater than zero");
                        PG_RETURN_NULL();
                }
        }
 
        /* Types get checked in the code, we'll keep things small out there */
        lwgeom_input = lwgeom_from_gserialized(gser_input);
        lwgeom_result = (LWGEOM*)lwgeom_to_points(lwgeom_input, npoints, seed);
        lwgeom_free(lwgeom_input);
        PG_FREE_IF_COPY(gser_input, 0);
 
        /* Return null as null */
        if (!lwgeom_result)
                PG_RETURN_NULL();
 
        /* Serialize and return */
        gser_result = geometry_serialize(lwgeom_result);
        lwgeom_free(lwgeom_result);
        PG_RETURN_POINTER(gser_result);
}

References geometry_serialize(), lwgeom_free(), lwgeom_from_gserialized(), and lwgeom_to_points().

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