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In this demo, we will create the logo for this package (OhMyCards.jl) with Makie! The initial idea for the logo was to have a card with some picture or plot in the background, and indistinct title text in the foreground.

Setup

First, we import all the packages we will need to draw the logo. We will be drawing the logo with the Makie.jl package, and using Colors.jl to get the Julia colors. Rendering is done to a vector graphics format so we use CairoMakie as the backend.

using Makie, CairoMakie
using Colors
using MakieTeX

import Colors: JULIA_LOGO_COLORS
JULIA_LOGO_COLORS
(red = RGB{N0f8}(0.796,0.235,0.2), green = RGB{N0f8}(0.22,0.596,0.149), blue = RGB{N0f8}(0.251,0.388,0.847), purple = RGB{N0f8}(0.584,0.345,0.698))

We want to create a rectangle with the right aspect ratio, this should do.

bounding_rectangle = Rect2f(0, 0, 15, 10)
GeometryBasics.HyperRectangle{2, Float32}(Float32[0.0, 0.0], Float32[15.0, 10.0])

Then, we create a geometry which is that rectangle, but with its corners rounded.

frame = Makie.roundedrectvertices(bounding_rectangle, 2, 50)
# This function returns an unclosed vector of points (points[begin] != points[end]),
# so we need to close it.
push!(frame, frame[begin])
lines(frame; color = 1:length(frame))
Example block output

Plotting

Now, we can start with the plotting! First

fig = Figure(; figure_padding = 0)
ax = Axis(fig[1, 1])
frameplot = poly!(ax, frame; color = :transparent, strokecolor = JULIA_LOGO_COLORS.purple, strokewidth = 2)
frameplot.strokewidth = 10
fig

titleplot = text!(ax, "OhMyCards is AWESOME"; color = JULIA_LOGO_COLORS.green, fontsize = 15, font = "/Users/anshul/downloads/anquietas.ttf")
titleplot.font =  "/Users/anshul/downloads/anquietas.ttf"
titleplot.fontsize = 55
titleplot.position = (1.5, 1.5)
fig
Example block output

Now, we sample points within the frame polygon, to get a cool background.

import GeometryOps as GO, GeoInterface as GI
frame_poly = GI.Polygon([GI.LineString(frame)])
points = map(1:500) do _
    point = Point2f(rand(0..15), rand(0..10))
    if GO.contains(frame_poly, point)
        return point
    end
end
magnitudes = rand(10..100, length(points))
500-element Vector{Float64}:
 52.87245978915731
 91.12897236426247
 51.04925065129933
 96.3290785854824
 86.90741504881804
 84.41402390883854
 68.0795180227962
 32.222296922988846
 62.49184980808034
 32.97384320397402
  ⋮
 16.72148978389226
 98.88637588342537
 57.951630513860565
 20.540305912543104
 96.46571289943165
 32.02865044140688
 76.85507543029182
 49.54642202393043
 85.92382543363433

scatter!(ax, points; color = rand(length(points)), markersize = magnitudes, colormap = :divergingbwr4095c42_n256, alpha = 0.1)

fig
Example block output
hidedecorations!(ax)
hidespines!(ax)
tightlimits!(ax)

titleplot[1][] = "🄾🅷 🄼🆈 🅲🅰🆁🅳🆂"
titleplot[1][] = "Ⓞⓗ Ⓜⓨ ⓒⓐⓡⓓⓢ"
titleplot[1][] = "□□ □□ □□□□□"
ax.scene.plots[end].alpha[] = 0.2
translate!(titleplot, 0, 0, 1)
fig
Example block output
ax.backgroundcolor = :transparent
fig.scene.backgroundcolor[] = RGBAf(1,1,1,0)
fig
Example block output

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