Vector graphics produced by the Julia Luxor package not being rendered in Quarto

[bkostadi]

I set up the Julia kernel for Quarto documents in RStudio, following the instructions on the Quarto website, and I reproduced the Plots demo in https://quarto.org/docs/computations/julia.html

However, when I installed the Julia package Luxor, I rendered my Quarto document without any errors, but it did not produce a plot of the turtle graphics (only the value true) that I was trying to reproduce from https://juliagraphics.github.io/Luxor.jl/v1.0/turtle.html

I did modify the Julia code in their example and removed the turtle emoji and the turtle image (turtles.png). I thought that maybe the issue was related to the graphics device and tried using different graphics devices, but to no avail.

It appears that the drawing function can create a file with the drawing, which can be specified in the function Drawing(600, 400, :png, "test.png") with the file name test.png, but also have the png file in the memory, specified by the argument :png. So, I just loaded the image file after the Julia code gets executed. I guess that's one quick solution, but it would be much better if the graphics get captured and properly embedded into the final output after rendering the qmd document. I also wondered how to suppress the value true being returned when I render the qmd document. The chunk option results='hide' does not to work.

Finally, when I run the Julia code chunk inside the Quarto document, RStudio crashes, the R session gets aborted and I have to restart my R session. I do have the JuliaCall R package installed. Below is the qmd file, where the Julia packages Luxor and Colors have been installed:

---
title: "Luxor Turtle Graphics"
format: html
---

```{julia}
using Luxor, Colors
Drawing(600, 400, :png, "test.png")
origin()
background("midnightblue")
t = Turtle() 
Pencolor(t, "cyan")
Penwidth(t, 1.5)
global n = 5
for i in 1:400
    Forward(t, n)
    Turn(t, 89.5)
    HueShift(t)
    n += 0.75
end
fontsize(20)
finish()
```

![Turtle Graphics](test.png){width="70%"}