layered.jl grid animations.jl

layered_grid_anim.jl

using Layered
using Animations
using VideoIO
using Colors

let
    prev = pwd()
    try
        mktempdir() do path
            cd(path)
            map(enumerate(0:1/60:3)) do (i, t)
                c, l = canvas(600, 400)

                w, h = 560, 360

                ps1 = P.(-w/2, -h/2:20:h/2)
                ps2 = P.(w/2, -h/2:20:h/2)

                ps3 = P.(-w/2:20:w/2, -h/2)
                ps4 = P.(-w/2:20:w/2,  h/2)

                panims1 = Animation.(
                    LinRange(0.5, 1.5, length(ps1)), ps1,
                    sineio(),
                    LinRange(1.5, 2.5, length(ps1)), ps2
                )

                panims2 = Animation.(
                    LinRange(0.5, 1.5, length(ps3)), ps3,
                    sineio(),
                    LinRange(1.5, 2.5, length(ps3)), ps4
                )

                coloranims1 = Animation.(
                    LinRange(0.5, 1.5, length(ps1)), RGB(1.0, 0, 0),
                    sineio(),
                    LinRange(1.5, 2.5, length(ps1)), RGB(0.0, 0, 0)
                )

                coloranims2 = Animation.(
                    LinRange(0.5, 1.5, length(ps3)), RGB(0.0, 1.0, 0),
                    sineio(),
                    LinRange(1.5, 2.5, length(ps3)), RGB(0.0, 0, 0)
                )

                lines!(l) do 
                    Line.(ps1, at.(panims1, t))
                end + Stroke(at.(coloranims1, t))

                lines!(l) do 
                    Line.(ps3, at.(panims2, t))
                end + Stroke(at.(coloranims2, t))


                csurface = Layered.draw_rgba(c, px_per_pt=0.75)
                png(c, "$(lpad(i, 4, '0')).png")
            end
            run(`ffmpeg -framerate 60 -i %4d.png -crf 23 video.mp4`)
            cp("video.mp4", joinpath(prev, "video.mp4"), force = true)
            cd(prev)
        end
    finally
        cd(prev)
    end
end