Do you know, że… ?
The situation is quite common, ale według moich obserwacji sprawiająca nieco problemów… Nie działa zastosowanie group nor can it be meaningfully done with Trim / Extend.
So how to do it?
One beam should be drawn.
Then select Trim / Extend and use as plane clipping tools (if the beam is centered in the 3D system). note, that should be rejected 3 objects, a 1 keep.
Then we reflect the cut beam twice with a mirror in relation to the same planes (like object) and ready.
Do you know a better method?
Share your solution in the comments.