# fragment activate command

Syntax

fragment activate keyword

Primary keywords:

Activate fragment auto-computation. Either the number of cycles or the time between fragment computations (with the cycles or time keyword, respectively) must be specified. Optionally, one can specify that the fragment ID be placed in a specified group slot for use with the range logic. Note that if contacts are manually removed or unbounded by the user, calling the fragment compute command is required so that the fragment auto-computation logic detects these changes. If the fragment persistence is set to false when registering contact types fragment auto-computation cannot be activated.

cycles i

Specify i cycles between fragment computations.

group-slot s

Optionally, specify that the fragment index is placed in group slot s as the fragments are updated.

time f

Specify f units of time between fragment computations.