Gets the ID of a link or node in the shortest path.
(tpm_traceshortscan trace_id flag)
Returns a topology ID (real) or nil.
| trace_id | Tracing model ID (real), returned by tpm_tracealloc |
| flag | Path element code (integer): 0 Current element 1 First element 2 Last element 3 Next element 4 Previous element |
First use tpm_traceshort to calculate a shortest path.