How to access planes generated by TextMesh?


I'm trying to do word-wrapping with TextMesh(3D). It seems TextMesh generates a set of planes and tunes their texture uv properly. I'd like to know if there is a way to access vertices of those planes so that I can calculate the distance between the first character (plane) and the last one. Thanks in advance!

There isn't any way to access the mesh that I'm aware of.