Can this be a proper usage of the Isovist component?

I know this looks ugly, and I'm not including the gh file because first I want to make sure that my understanding about the way the isovist component should work is ok.

I have a bunch of planar curves (in no particular sort order) that are fed into the obstacles input on isovist.  I have a ray that is fed in also.  If just feeding in planar curves (all on the same plane) should the isovist ray identify the very first obstacle (curve) that it encounters?  Or does it find the first obstacle by the order the curves are inputed?