Cant get video from Makie in Pluto

New to Julia
,
1

Hi. I was just messing around with makie in Pluto cause I’m trying to get familiar with the language and Pluto notebooks for a project I’m planning on doing on differential equations(namely the heat equation) and I was trying to run this code for the Makie website but i couldnt figure out how to get the video to actually run in Pluto. Any help for a noob like me would be much appreciated.

using GLMakie

Base.@kwdef mutable struct Lorenz
    dt::Float64 = 0.01
    σ::Float64 = 10
    ρ::Float64 = 28
    β::Float64 = 8/3
    x::Float64 = 1
    y::Float64 = 1
    z::Float64 = 1
end

function step!(l::Lorenz)
    dx = l.σ * (l.y - l.x)
    dy = l.x * (l.ρ - l.z) - l.y
    dz = l.x * l.y - l.β * l.z
    l.x += l.dt * dx
    l.y += l.dt * dy
    l.z += l.dt * dz
    Point3f(l.x, l.y, l.z)
end

attractor = Lorenz()

points = Observable(Point3f[])
colors = Observable(Int[])

set_theme!(theme_black())

fig, ax, l = lines(points, color = colors,
    colormap = :inferno, transparency = true,
    axis = (; type = Axis3, protrusions = (0, 0, 0, 0),
              viewmode = :fit, limits = (-30, 30, -30, 30, 0, 50)))

record(fig, "lorenz.mp4", 1:120) do frame
    for i in 1:50
        push!(points[], step!(attractor))
        push!(colors[], frame)
    end
    ax.azimuth[] = 1.7pi + 0.3 * sin(2pi * frame / 120)
    notify(points)
    notify(colors)
    l.colorrange = (0, frame)
end
2

Probably by using a <video> tag in some html code to include the locally saved file. Google should show some ways to output html in Pluto

3

Oh ok. What folder does pluto save the file in?

4

It’s Makie that saves it, not Pluto, and it’s relative to your current working directory. You can find that with pwd()

5

You should be able to use PlutoUI.LocalResource to view the .mp4 file inside the notebook.

For the path, it might help to first create a temporary path and store it:

path = tempname() * "_lorentz.mp4"
record(f, fig, path, 1:120)
PlutoUI.LocalResource(path)