I am trying to create folding marks in the QGIS-print composer. Basically they are just markers along a line - with the twist, that the spacing is not even. I want to avoid having to create several lines, because that would involve a lot of fiddling and wouldn't be as elegant.
So my idea is to create either a line or an arrow and use
make_point(...) in order to create orthogonal dashes along that line/arrow. Sadly testruns didn't work, so the question is, whether I actually could use the geometry generator in this scenario, and if yes, which "coordinate system" I would have to use. So far I tried
mm-based coordinates within the bbox of the line/arrow.