Added elliptical distance graphics

graphics/elliptical_distance.jl

@@ -0,0 +1,33 @@
+using CairoMakie
+using LaTeXStrings: @L_str
+
+includet("../src/Visualization/common_CairoMakie.jl")
+
+function gen_elliptical_distance_graphics()
+    box_length = 100
+
+    init_cairomakie!()
+
+    fig = gen_figure()
+
+    ax = Axis(fig[1, 1]; xlabel=L"x", ylabel=L"y")
+
+    elliptical_a_b_ratio = 0.4
+    as = 1:1:3
+
+    for a in as
+        x = collect(LinRange(-a, a, 1000))
+        y = @. sqrt(a^2 - x^2) * elliptical_a_b_ratio
+        append!(x, reverse(x))
+        append!(y, reverse(-y))
+        lines!(x, y; label=L"a = %$a")
+    end
+
+    axislegend(ax; position=:rt, padding=3, rowgap=-3)
+
+    set_gaps!(fig)
+
+    save_fig("elliptical_distance.pdf", fig)
+
+    return nothing
+end