sfcgal_difference()

Datum sfcgal_difference

(

PG_FUNCTION_ARGS

)

Definition at line 529 of file postgis/lwgeom_sfcgal.c.

{
        GSERIALIZED *input0, *input1, *output;
        sfcgal_geometry_t *geom0, *geom1;
        sfcgal_geometry_t *result;
        srid_t srid;
 
        sfcgal_postgis_init();
 
        input0 = (GSERIALIZED*) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
        srid = gserialized_get_srid(input0);
        input1 = (GSERIALIZED*) PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
        geom0 = POSTGIS2SFCGALGeometry(input0);
        PG_FREE_IF_COPY(input0, 0);
        geom1 = POSTGIS2SFCGALGeometry(input1);
        PG_FREE_IF_COPY(input1, 1);
 
        result = sfcgal_geometry_difference(geom0, geom1);
        sfcgal_geometry_delete(geom0);
        sfcgal_geometry_delete(geom1);
 
        output = SFCGALGeometry2POSTGIS(result, 0, srid);
        sfcgal_geometry_delete(result);
 
        PG_RETURN_POINTER(output);
}

References gserialized_get_srid(), POSTGIS2SFCGALGeometry(), sfcgal_postgis_init(), and SFCGALGeometry2POSTGIS().

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