sfcgal_approximate_medial_axis()

Datum sfcgal_approximate_medial_axis

(

PG_FUNCTION_ARGS

)

Definition at line 438 of file postgis/lwgeom_sfcgal.c.

References gserialized_get_srid(), PG_FUNCTION_INFO_V1(), POSTGIS2SFCGALGeometry(), POSTGIS_SFCGAL_VERSION, sfcgal_intersection(), sfcgal_postgis_init(), and SFCGALGeometry2POSTGIS().

Referenced by sfcgal_straight_skeleton().

{
#if POSTGIS_SFCGAL_VERSION < 12
        lwpgerror("The SFCGAL version this PostGIS binary "
                "was compiled against (%d) doesn't support "
                "'sfcgal_geometry_approximate_medial_axis' function (1.2.0+ required)",
                POSTGIS_SFCGAL_VERSION);
        PG_RETURN_NULL();
#else /* POSTGIS_SFCGAL_VERSION >= 12 */
        GSERIALIZED *input, *output;
        sfcgal_geometry_t *geom;
        sfcgal_geometry_t *result;
        srid_t srid;

        sfcgal_postgis_init();

        input = PG_GETARG_GSERIALIZED_P(0);
        srid = gserialized_get_srid(input);
        geom = POSTGIS2SFCGALGeometry(input);
        PG_FREE_IF_COPY(input, 0);

        result = sfcgal_geometry_approximate_medial_axis(geom);
        sfcgal_geometry_delete(geom);

        output = SFCGALGeometry2POSTGIS(result, 0, srid);
        sfcgal_geometry_delete(result);

        PG_RETURN_POINTER(output);
#endif /* POSTGIS_SFCGAL_VERSION >= 12 */
}

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