LWGEOM_simplify2d()

Datum LWGEOM_simplify2d

(

PG_FUNCTION_ARGS

)

Definition at line 64 of file lwgeom_functions_analytic.c.

{
        GSERIALIZED *geom = PG_GETARG_GSERIALIZED_P_COPY(0);
        double dist = PG_GETARG_FLOAT8(1);
        GSERIALIZED *result;
        int type = gserialized_get_type(geom);
        LWGEOM *in;
        bool preserve_collapsed = false;
        int modified = LW_FALSE;
 
        /* Can't simplify points! */
        if ( type == POINTTYPE || type == MULTIPOINTTYPE )
                PG_RETURN_POINTER(geom);
 
        /* Handle optional argument to preserve collapsed features */
        if ((PG_NARGS() > 2) && (!PG_ARGISNULL(2)))
                preserve_collapsed = PG_GETARG_BOOL(2);
 
        in = lwgeom_from_gserialized(geom);
 
        modified = lwgeom_simplify_in_place(in, dist, preserve_collapsed);
        if (!modified)
                PG_RETURN_POINTER(geom);
 
        if (!in || lwgeom_is_empty(in))
                PG_RETURN_NULL();
 
        result = geometry_serialize(in);
        PG_RETURN_POINTER(result);
}

References geometry_serialize(), gserialized_get_type(), LW_FALSE, lwgeom_from_gserialized(), lwgeom_is_empty(), lwgeom_simplify_in_place(), MULTIPOINTTYPE, and POINTTYPE.

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