[ANN]: TernaryDiagrams.jl

Hi all! I made a small Makie recipe package that allows you to draw ternary plots like this:

I am planning on eventually making a ternary axis properly (instead of co-opting the regular 2D axis like I do currently), so that there won’t be as much white space around the figure. In the mean time, if you use the package and have any comments, let me know!

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Just used this, it looks really neat! One potential idea which you could use is to create something like the PolarAxis layoutable, wherein the Scene has a fixed transform_func which translates 3D points to 2D points.

I just made this plot for a colorlegend, the output is below:

with the script (slightly kludgey, I know :slightly_frowning_face:)

xs = LinRange(0, 1, 1000)
ys = LinRange(0, 1, 1000)

barycentric_points = TernaryDiagrams.from_cart_to_bary.(xs, ys')

colors = map(barycentric_points) do barycentric_point
    if any(barycentric_point .< 0.0)
        return RGBf(1,1,1)
    else
        return RGBf(barycentric_point...)
    end
end

fig = Figure();
ax = Axis(fig[1, 1]);

ternaryaxis!(
    ax;
    labelx = "Bad",
    labely = "Good",
    labelz = "Uncertain",
    xtickformat = tick -> TernaryDiagrams._default_formatter(tick*100)*"%",
    ytickformat = tick -> TernaryDiagrams._default_formatter(tick*100)*"%",
    ztickformat = tick -> Makie.rich(Makie.rich(TernaryDiagrams._default_formatter(tick*100)*"%", color = :black), "--"; color = :white)
);
xlims!(ax, -0.2, 1.2)
ylims!(ax, -0.3, 1.1)
hidedecorations!(ax)
img_plt = image!(ax, xs, ys, colors)
translate!(img_plt, 0, 0, -100)
fig
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That is really great! I will definitely look into the way you made the colorlegend. Filling the triangle with colors was by far the hardest part of the entire recipe.

Sadly, I don’t see myself having time for this until mid March, but I will keep you posted!

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