An entity can create a population of entities at a given simulation time.
EntityClass ec = lookupEntityClass( "entclass" ); Population p = new PopulationBuilder( "newentities", ec, 1, null ); construct( getLocalTime() + getMinOutputDelay(), p, NullCallback );
The difference between constructing populations from an entity and from the script reader, is that the time and callback must be specified. The time is the local time;. The callback is called when the population has been constructed.