[Gmsh] line attractor

[walter steffe]

Hi

In my application (high frequency electromagnetics) I need to generate
surface meshes (on the faces of a given solid) such that the near edge
triangles are highly anisotropic and have the longer dimension oriented
along the edge.
Is it possible to obtain this kind of effect using the gmsh command
attractor line ?
If so do you have any picture which show an example mesh ?

Thanks

Walter Steffè