Simple game with Julia

[DominiqueMakowski]

Hey guys,

I am slowly getting back to Julia, with the same longterm aim that I had a few years ago (creating a module for psychological experiment creation, see this issue).

However, in order to start really slowly, I'd like to get familiar with openGL and the related Julia modules by creating a small game, why not a snake-like thing, just to get familiar with how to create windows, move shapes and images and display text.

Do you think that Makie.jl would be a good choice for implementing such a game? Or should I look for lower level API?

Thanks a lot for your answers

[SimonDanisch]

I think makie should work nicely :)

using Makie

res = 500
game = Scene(resolution = (res, res))
campixel!(game)
cell = 10
cells = res ÷ 10
snakelen = 5
middle = cells ÷ 2
snakestart = middle - (snakelen ÷ 2)
segments = Point2f0.(middle, range(snakestart, step = cell, length = snakelen))
snake = scatter!(game, segments, markersize = cell, raw = true, color = :blue)[end]
speed = 1/5
global last_dir = (0, 1)
dir = lift(game.events.keyboardbuttons) do but
    global last_dir
    ispressed(but, Keyboard.left) && return (last_dir = (-1, 0))
    ispressed(but, Keyboard.up) && return (last_dir = (0, 1))
    ispressed(but, Keyboard.right) && return (last_dir = (1, 0))
    ispressed(but, Keyboard.down) && return (last_dir = (0, -1))
    last_dir
end
display(game)
newsnake = copy(segments)
while isopen(game)
    curr_snake = snake[1][]
    circshift!(newsnake, curr_snake, 1)
    newsnake[1] = newsnake[2] .+ Point2f0(dir[] .* cell)
    snake[1] = newsnake
    newsnake = curr_snake
    sleep(speed)
end

Have fun :)

[DominiqueMakowski]

This snake is impressively neatly coded (and works)! :)

Although, after looking at it and trying to understand, I am starting to think Makie might be to "high level" for my intent. I'll open a new issue to clarify. Thanks a lot.