✔ Makie.jl: draw lines across two axes? · helpdesk (published)

Stream: helpdesk (published)

Topic: ✔ Makie.jl: draw lines across two axes?

japhir (Sep 06 2024 at 13:06):

Is there any way to draw lines between axes somehow?

Here's an example figure from https://doi.org/10.1016/j.epsl.2010.09.044 that illustrates my intended end-goal with the green lines.
2024-09-06-150524_region.png

Here's an attempt at the simplest reprex I could think of:

using GLMakie

# Create a figure with two axes
fig = Figure()

ax1 = Axis(fig[1, 1], title="Plot 1")
ax2 = Axis(fig[1, 2], title="Plot 2")

# Define points in both axes
point1 = Point2f(0.3, 0.6)
point2 = Point2f(0.7, 0.4)

# Scatter points on each axis
scatter!(ax1, point1)
scatter!(ax2, point2)

# Draw a line between the points across the axes
# ???
# lines!(ax1, [point1, point2], linewidth=2, color=:green)
# lines!(ax2, [point1, point2], linewidth=2, color=:green)
lines!(fig[1,1:2], [point1, point2]) # errors

ederag (Sep 06 2024 at 13:31):

Questions about Makie are best asked on discourse, where the Makie devs
can see them and help.
But it should be possible, as Makie gives a lot of control.

Here is a related post, that might help.

https://discourse.julialang.org/t/visual-connection-between-different-axes-in-makie-jl/116535/9
the line points are given in the data coordinates of two different axes.

The core is this function that returns the scene coordinates from the axis data coordinates

function posFig(ax, x, y)
    o = ax.scene.viewport[].origin
    return Makie.project(ax.scene, Point2f(x, y)) + o
end

Then the line drawing is done on the scene itself, rather than on any axis.

lines!(fig.scene, ...

japhir (Sep 06 2024 at 13:35):

Awesome, thanks for linking to that answer! I didn't find it when searching. I'll be sure to ask future Makie questions over on discourse.

Notification Bot (Sep 06 2024 at 13:35):

japhir has marked this topic as resolved.

japhir (Sep 06 2024 at 13:38):

The only downside I'm seeing so far is that this doesn't work with GLMakie's interactive figures.

japhir (Oct 15 2024 at 07:56):

Last updated: Nov 06 2024 at 04:40 UTC