thats an example from fire_rocket
bust what does these tell me or what do they do:
VectorCopy( start, bolt->s.pos.trBase ); start= rocket starpos. , ???
VectorScale(dir,25,bolt->s.pos.trDelta); dir= direction,speed, ???
SnapVector( bolt->s.pos.trDelta ); clear ^^
VectorCopy (start, bolt->r.currentOrigin); start= another startpos??? , ???
i dont wanna know what the vector functions mean thats clear 
just : bolt->s.pos.trBase ;bolt->s.pos.trDelta ; bolt->r.currentOrigin and the 2nd “start”
??
thx in advance