LWGEOM_ChaikinSmoothing()

Datum LWGEOM_ChaikinSmoothing

(

PG_FUNCTION_ARGS

)

Definition at line 130 of file lwgeom_functions_analytic.c.

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *result;
        int type = gserialized_get_type(geom);
        LWGEOM *in;
        LWGEOM *out;
        int preserve_endpoints=1;
        int n_iterations=1;
 
        if ( type == POINTTYPE || type == MULTIPOINTTYPE )
                PG_RETURN_POINTER(geom);
 
        if ( (PG_NARGS()>1) && (!PG_ARGISNULL(1)) )
                n_iterations = PG_GETARG_INT32(1);
 
        if (n_iterations< 1 || n_iterations>5)
                elog(ERROR,"Number of iterations must be between 1 and 5 : %s", __func__);
 
        if ( (PG_NARGS()>2) && (!PG_ARGISNULL(2)) )
        {
                if(PG_GETARG_BOOL(2))
                        preserve_endpoints = 1;
                else
                        preserve_endpoints = 0;
        }
 
        in = lwgeom_from_gserialized(geom);
 
        out = lwgeom_chaikin(in, n_iterations, preserve_endpoints);
        if ( ! out ) PG_RETURN_NULL();
 
        /* COMPUTE_BBOX TAINTING */
        if ( in->bbox ) lwgeom_add_bbox(out);
 
        result = geometry_serialize(out);
        lwgeom_free(out);
        PG_FREE_IF_COPY(geom, 0);
        PG_RETURN_POINTER(result);
}

References LWGEOM::bbox, geometry_serialize(), gserialized_get_type(), lwgeom_add_bbox(), lwgeom_chaikin(), lwgeom_free(), lwgeom_from_gserialized(), MULTIPOINTTYPE, and POINTTYPE.

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