`clip_on` kwarg like in matplotlib to avoid cutting off points at boundary

[SimonEnsemble]

clip_on kwarg would be cool to still show the entirety of the markers from scatter after xlims!(ax, [0, 1]). see boundaries on left and right how two points are cut in half.

[jkrumbiegel]

Currently, clipping is done on scene level, so every plot inside a scene is clipped at the px_area rectangle. Either this would have to be made toggleable on plot object level (participate in clipping or not) or better yet, every plot should optionally have its own clipping area. This would be needed for triangular shapes for ternary plots for example, or more complex polygons for geographic plots with round frames. In CairoMakie, it would be trivial to implement, but I'm not sure at all how clipping in GLMakie works.

[SimonEnsemble]

we have another use case where clip_on is needed.

seems important for ylims!(0, nothing) but that cuts the points in half... any way to draw the points over the axis?

[jkrumbiegel]

There's no way to do that currently. In principle it would be possible to disable clipping to the scene px_area. I would actually like to see arbitrary clipping shapes for polar plots and such.

[ffreyer]

I set up clip planes to clip scatter markers when their coordinate gets clipped rather than their pixels. So we could use those to avoid cutting off markers