# zone trace command

Syntax

zone trace keyword

Primary keywords:

Trace zone position and velocity. See the c trace commands.

The positions and velocities of locations on the zone can be sampled and stored during a model run by using this command. The resulting path through space can be visualized with the FLAC3D interface. Only one trace position may be created per zone trace command. Traces may be added at any time.

A summary of all traces can be obtained by using the trace list command.

The following keywords are available to specify which zone location is traced.

zoneid i

Add a trace of the centroid of the zone with ID i.

gridpointid i

Add a trace of the location corresponding to the gridpoint ID i.

position v

Add a trace at position v, which must fall in or on some zone.