Michael,

>> But the image you linked to looks like all the same pixel filled area like in the first image above... <<

Yes that image was a poor choice because the vectors are on the same plane, and hence there is no foreshortening of vectors viewed head-on (or tail on).

Below is Karsten's existing solution for vector display. Although it works well, the arrows are not scale-independent & so an arrowhead may obscure much of the model if viewed closeup & head-on.



Your dimension arrows (as shown in your video) would be suitable except a vector is one-dimensional not tied to a plane.
Perhaps this is more difficult then first thought.

Thanks for looking into this
James