The difference between "mDirection" and "transVector"

[qingshenwangzi]

Excuse me.Can any friend tells me the difference between "mDirection" and "transVector" ?
If the "mMove" has the same value, sentence"mDirection.x = -mMove;" and sentence "transVector.x -= mMove;" have the same effert.So what on earth is the difference between them？
Thank you so much.

[jacmoe]

Could you tell me where 'mDirection' and 'transVector' is?
Just looking at the names, I'd guess that 'mDirection' is a pointer to a Quaternion and 'transVector' is a displacement vector of type Vector3.

[qingshenwangzi]

Thank you. Maybe you are right.
I come across this problem when I tried to analyse the Basic tutorial 5, I compared the sentence"mDirection.x = -mMove;" inside with the Basic tutorial 4's sentence "transVector.x -= mMove;" .