Intersect 2D line with 3D edge

This cannot be performed easily.

In this example I want to trace around this skylight so I can carry the hidden lines to another drawing.

I draw a line around as in here:

Then I want to find the intersection of that line with the model and I can’t, so I have to create another line in 2D space and then use the knife to break it, and then the eraser to clean excess.

This could be a lot easier to do and it makes tracing objects very hard.

One alternative would be exploding but that is a lot of trouble. Copy pasting lines from sketchup to Layout implies a lot of work too.

Tracing is key for linework and it’s very hard with current model inferencing.