Animation Nodes Help

Hey everyone,

I need your help with some animation nodes, i dont know if this is possible, but, here is my problem:

What i'am trying to do, is to get a Spline from the center volume of a flat mesh/text. But i dont know how to do it. Let the image explain for themself.

The Pic 1 , is what i need to get.

The pic 2 , is what i've archieve until now.

Please, can you help me, or give a guide, i´ve read and google with no luck. Sorry for my latin english : ) Thanks