Pointer to a second entity. Is preserved in functions during wait(),
but modified by many functions. At the start of an entity function, you is the pointer to the creating entity (if any), otherwise NULL.
c_trace, c_scan, c_move, ent_create and
many other functions .
my.pan = your.pan; // get the same direction as the creating entity
c_move(me,vector(30*time_step,0,0),NULL,IGNORE_YOU); // ignore the creating entity
Entity, my, ent_create, c_trace, c_scan