Visual connection between different axes in Makie.jl

[albertomercurio]

using CairoMakie

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

fig = Figure()
ax1 = Axis(fig[1, 1:3])
ax2 = Axis(fig[2, 1])
ax3 = Axis(fig[2, 2])
ax4 = Axis(fig[2, 3])

pts1 = [posFig(ax1, 5, 2), posFig(ax2, 5, 5)]
pts2 = [posFig(ax1, 5, 2), posFig(ax3, 5, 5)]
pts3 = [posFig(ax1, 5, 2), posFig(ax4, 5, 5)]

lines!(fig.scene, getindex.(pts1, 1), getindex.(pts1, 2))
lines!(fig.scene, getindex.(pts2, 1), getindex.(pts2, 2))
lines!(fig.scene, getindex.(pts3, 1), getindex.(pts3, 2))

fig