[Qgis-user] How to make diagonals

[Dario C]

Hi,
I have several rectangles (almost squared) and I'd like to represent
their diagonals.

I started to do with geometry generator with:
make_line(point_n($geometry,1),point_n($geometry,4))
and
make_line(point_n($geometry,2),point_n($geometry,5))

Unfortunately, even if they look rectangular, actually they have more then
4 points and, moreover, points do not always have the same order.

here below an example:
[image: image.png]

Is there any expression in order to pick the two longest segments
connecting all the points of the geometry?


Thanks
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