how does toCompVec exactly work?????

[ahmed hamed elsaid]

I tried to search so much about toCompVec, fromCompVec online.
But, I found nothing usefull.
So I am asking what does exaclty toCompVec and fromCompVec do????
I know how toComp and fromComp, it takes a vector(point as mathmatical representaion) and just see What is the visual equivilant vector in the other vector space(trying to explain intuitively without linear algebra details).
So what does toCompVec do exactly, in math language or after effects.
Thank you!

[Rick Gerard]

toComp and fromComp return the actual position of a point for a layer that is a child of another layer. 

[ahmed hamed elsaid]

I am asking for toCompVec not toComp