Subjects are the foundational lightweight entities managed by Apparatus. They are mostly UE-independent and consist of Traits and Flags.

In order to spawn a new Subject within the Mechanism, you should call one of the SpawnSubject methods. The simplest one would be:

FSubjectHandle Subject = Machine::SpawnSubject();

If you want to spawn a Subject with some Traits initially attached to it, use the special templated version of the method:

FBurning Burning{10, 15.5f};
FSword Sword{2};
FSubjectHandle Subject = Machine::SpawnSubject(Burning, Sword);

This would pre-allocate a Slot for the Subject in the correct Chunk and initialize it according to the supplied traits.