Makie - Plotting hatched polygons in CairoMakie

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1

Hi!

I’m looking to reimplement various tools I have using python+matplotlib to julia+makie. Most of these deal with stellar astrophysics. One particular one is a plotting tool meant to post-process simulation data into one particular type of plot:

https://github.com/orlox/mkipp

The core of what I need here is to make arbitrarily shaped hatched regions with holes. Using GLMakie I’ve found the snippet below can do the job:

using GLMakie
using Makie

f = Figure(resolution=(500,500))
Axis(f[1, 1])

pat = Makie.Pattern("+")

# polygon with hole
p = Makie.GeometryBasics.Polygon(
    Point2f[(0, 0), (3, 0), (3, 3), (0, 3)],
    [Point2f[(1.0, 1.0), (2.0, 1.0), (2.0, 2.0), (1.0, 2.0)]]
)

poly!(p, color=pat)

save("figure.png", f)

However, I need to use CairoMakie as well, since vector graphics support is important.The same code switched to CairoMakie gives me instead an error:

Unsupported Color type: Makie.LinePattern{ColorTypes.RGBA{Float32}}

Is this just a feature that is yet to be implemented in CairoMakie? If so, is there any workaround?

Thanks for any help!

2

It’s just not implemented, yes. If you want to try, it would probably not be too difficult to add a dispatch method for LinePattern with a Cairo implementation.

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