lwcollection_offsetcurve()

static LWGEOM* lwcollection_offsetcurve ( const LWCOLLECTION *  col, double  size, int  quadsegs, int  joinStyle, double  mitreLimit  )

static

Definition at line 1524 of file liblwgeom/lwgeom_geos.c.

{
        const LWGEOM *geom = lwcollection_as_lwgeom(col);
        int32_t srid = RESULT_SRID(geom);
        uint8_t is3d = FLAGS_GET_Z(col->flags);
        LWCOLLECTION *result;
        LWGEOM *tmp;
        uint32_t i;
        if (srid == SRID_INVALID) return NULL;
 
        result = lwcollection_construct_empty(MULTILINETYPE, srid, is3d, LW_FALSE);
 
        for (i = 0; i < col->ngeoms; i++)
        {
                tmp = lwgeom_offsetcurve(col->geoms[i], size, quadsegs, joinStyle, mitreLimit);
 
                if (!tmp)
                {
                        lwcollection_free(result);
                        return NULL;
                }
 
                if (!lwgeom_is_empty(tmp))
                {
                        if (lwgeom_is_collection(tmp))
                                result = lwcollection_concat_in_place(result, lwgeom_as_lwcollection(tmp));
                        else
                                result = lwcollection_add_lwgeom(result, tmp);
 
                        if (!result)
                        {
                                lwgeom_free(tmp);
                                return NULL;
                        }
                }
        }
 
        if (result->ngeoms == 1)
        {
                tmp = result->geoms[0];
                lwcollection_release(result);
                return tmp;
        }
        else
                return lwcollection_as_lwgeom(result);
}

References LWCOLLECTION::flags, FLAGS_GET_Z, LWCOLLECTION::geoms, LW_FALSE, lwcollection_add_lwgeom(), lwcollection_as_lwgeom(), lwcollection_concat_in_place(), lwcollection_construct_empty(), lwcollection_free(), lwcollection_release(), lwgeom_as_lwcollection(), lwgeom_free(), lwgeom_is_collection(), lwgeom_is_empty(), lwgeom_offsetcurve(), MULTILINETYPE, LWCOLLECTION::ngeoms, result, RESULT_SRID, and SRID_INVALID.

Referenced by lwgeom_offsetcurve().

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