Render edges

[hannobraun]

Right now, only faces are rendered. And they are shaded according to their angle towards the camera.

This works very well, mostly, but if you're looking at the edge between two faces, such that both faces have exactly the same angle towards the camera, you can no longer make out the edge, and both faces look like one face.

It would be better to just render edges as a black line.

[hannobraun]

I've decided to close this issue. fj-viewer is only a development tool now, and while improvements to rendering are still in scope and very welcome, I don't think it makes sense to have too many open issues to track potential usability improvements.

See A New Direction for context.