소개

우선 개요에서

Animation을 사용하는 방법

일반적인 사용법

anim = @animate for i in 1:10
    plot(t->sinpi(t+i/5), range(0, 2, length=100))
end

#gif(anim, "sin.gif", fps=10)

매크로를 확장하면?

anim = Animation()
for i in 1:10
    plt = plot(t->sinpi(t+i/5), range(0, 2, length=100))
    frame(anim, plt)
end

# gensym を使って変数名を生成した結果、 var"##tag#番号" という変数が得られる？
var"##anim#576" = Animation()
global var"##counter#577" = 1

for i = 1:10
    plot((t->begin
            sinpi(t + i / 5)
        end), range(0, 2, length=100))

    # 例えば 10 フレームごとにプロットする場合は var"##counter#577" を使って条件分岐する
    if true
        frame(var"##anim#576")
    end
    global var"##counter#577" += 1
end

var"##anim#576"

처리 흐름

주요 함수에 대해 자세히 알아보기

애니메이션

"Represents an animation object"
struct Animation
    dir::String
    frames::Vector{String}
end

function Animation()
    tmpdir = convert(String, mktempdir())
    Animation(tmpdir, String[])
end

"""
    frame(animation[, plot])
Add a plot (the current plot if not specified) to an existing animation
"""
function frame(anim::Animation, plt::P=current()) where P<:AbstractPlot
    i = length(anim.frames) + 1
    filename = @sprintf("%06d.png", i)
    png(plt, joinpath(anim.dir, filename))
    push!(anim.frames, filename)
end

mp4

run(`ffmpeg -v 0 -framerate $fps -loop $loop -i $(animdir)/%06d.png -pix_fmt yuv420p -y $fn`)

AnimatedGif(fn)

바세. 처w

"Wraps the location of an animated gif so that it can be displayed"
struct AnimatedGif
    filename::String
end

# write out html to view the gif... note the rand call which is a hack so the image doesn't get cached
function Base.show(io::IO, ::MIME"text/html", agif::AnimatedGif)
    ext = file_extension(agif.filename)
    write(io, if ext == "gif"
        "<img src=\"$(relpath(agif.filename))?$(rand())>\" />"
    elseif ext in ("mov", "mp4")
        "<video controls><source src=\"$(relpath(agif.filename))?$(rand())>\" type=\"video/$ext\"></video>"
    else
        error("Cannot show animation with extension $ext: $agif")
    end)
end