Picking a line is too difficult

[dpsanders]

Is it possible to increase the tolerance for picking a line?

[asinghvi17]

If you mean increasing the bounding box, then I think so; but are you trying to select a line using the mouse? If so, how are you selecting it?

[dpsanders]

Yes, selecting using mouse -- in the "standard" way from https://simondanisch.github.io/ReferenceImages/gallery//edit_polygon/index.html, i.e.

plot, _idx = mouse_selection(scene)
                 if plot == pplot

[SimonDanisch]

you could draw a thicker transparent line underneath... or implement your own is point close to line ;) That'd be nice to have as a fallback anyways

[ffreyer]

JuliaPlots/AbstractPlotting.jl#696 + JuliaPlots/GLMakie.jl#177 make pick(scene, pos, range) more available (it picks the closest point within range to the given position) and it adds a pick_sorted(scene, pos, range) for when you want to filter out plots yourself (which is very useful with Axis drawing a background rectangle).

JuliaPlots/AbstractPlotting.jl#677 also adds some magic for finding the closest point on a line in both 2D and 3D.

I think this can be closed with those pr's merged

[ffreyer]

Minor update on this - all these pr's have been merged now. If you want to pick a line with tolerance you can use something like

for (plot, idx) in pick_sorted(fig.scene, mouseposition_px(fig.scene), 10)
    if plot == my_line_plot
        do_something(plot, idx)
        break
    end
end

Note that for 2d Axis there is a mesh in the background which will take priority with pick. So you need to sort through selections like in the example. In 3d you can probably get by with pick(scene, pos, range).

There also a mouse_selection(scene, range) which calls pick(scene, pos, range).