There are a couple of things going on here.
If you’re looking to also get SketchUp to draw in the ‘faces’ as it typically always does, then your going to need to ‘triangulate’ your walls. . . Which is to say it’s necessary to draw an additional line in between opposing corners… such that the line starts at top lefthand corner, and then ends at the lower right corner.
Once you do this SketchUp will be able to assign a surface to the triangular plane which you’ve made by drawing in the diagonal line. It’s really now two surfaces within SU, but if you hide the diagonal line you can fake the appearance of a single surface.
As far as finding where the intersections happen…
I’d go about this by making a copy of each wall, and placing each ‘wall copy’ into it’s own ‘group’. Then use the Move tool so that you can slide the copied walls along the plane/path of the original one.
Try the Scale Tool for extending the Wall Heights, so that they meet with the ceiling.
Finally run the ‘intersect faces’ command on the copied walls and that should get SU to draw in where the intersections happen.
At some point Pray to the Gods of Interpretation and Compromise for forgiveness, because you’ll never find a common meeting point for all the existing corners to extend to… Things will have to move, and that’s going stand in harsh opposition to your idealism and general perfectionism in taking field measurements with the Leica Disto.
As fate would have it, I own a Leica Disto too—not the newer D series, but their original A series. It cost me a ton of money… and I’ve since learned that I don’t let it boss me around when it comes to placing too much faith in it’s accuracy.
The Distance accuracy with the disto is surprisingly good… but it’s ability to measure angles via the tilt sensor don’t match the same high standard.
Some hopefully helpful Notes after my little Disto Rant…
For making copies of your walls. copy the entire existing group… and then use the ‘paste in place’ function. That will will set the copies back to the exact position they were made in.
The intersect Faces command is found on the ‘Right Click’ context menu.
If you paint the copied wall a unique color it’s a lot easier to not get confused between the original and the copies.
test_wall (alt JD).skp (265.0 KB)