2D plot flush with 3D axis?

Specific Domains Visualization
1

I’m trying to plot a 2D graph underneath a 3D plot. The following is my hacky approach,

using GLMakie

fig = Figure()
menu = Menu(fig, options = [1,2])
fig[1, 1] = vgrid!(
    Label(fig, "Index a", width = nothing),menu;
    tellheight = false, width = 200)
ax = Axis3(fig[1, 2])

menu.selection[] = 1

function my_function(a,x)
    data = [sin.(pi*x), 5 .+ cos.(pi*x)]
    return data[a]
end
xplot = LinRange(-1,1,100)
yplot = cos.(pi*xplot)
zplot = @lift my_function($(menu.selection),xplot) 
plt = lines!(ax, xplot, yplot, zplot)

# I'd like this line to be flush against the bottom boundary
lines!(ax, -1:1, -1:1, Makie.@lift(ones(3)*minimum($zplot)))

on(menu.selection) do s
    Makie.autolimits!(ax)
end

fig

but the line isn’t flush with the bottom boundary.

Screen Shot 2021-06-02 at 11.36.05 AM
Screen Shot 2021-06-02 at 11.36.05 AM1024×868 62.5 KB

Is there a way to plot a line flush against the bottom of an Axis3, and to have that update with autolimits!?

2

Yeah you just have to change the autolimit margins so there’s no additional space at the bottom. Without looking it up, I guess ax3.zautolimitmargin = (0, 0.05) could work.

3

Works like a charm. Thanks!

4

Shoot, I spoke to soon - it works for the first plot, but doesn’t refresh after menu selection.

5

If it doesn’t refresh, maybe your observable order is wrong and the axis updates first, then the data?

6

Sorry, my description may have been misleading.

The line plot starts out flush with the bottom upon running the script, but after a menu selection, the line is no longer flush with the bottom. I set ax.zautolimitmargin = (0.0,.05) and it stays the same after menu selection, but the plot no longer honors these limits.

7

Went with another approach for now - we switched to LScene() for zoom interactivity and turned off the axis (so there’s no need to flush the bottom plot with anything anymore).

I don’t know how to make autolimits! to work with LScene(), but with interactivity we can at least just move the plot around manually after menu.selection picks out a solution.