Animations
Animations are created in 3 steps:
- Initialize an
Animation
object. - Save each frame of the animation with
frame(anim)
. - Convert the frames to an animated gif with
gif(anim, filename, fps=15)
The convenience macros @gif
and @animate
simplify this code immensely. See the home page for examples of the short version, or the gr example for the long version.
Convenience macros
There are two macros for varying levels of convenience in creating animations: @animate
and @gif
. The main difference is that @animate
will return an Animation
object for later processing, and @gif
will create an animated gif file (and display it when returned to an IJulia cell).
Use @gif
for simple, one-off animations that you want to view immediately. Use @animate
for anything more complex. Constructing Animation
objects can be done when you need full control of the life-cycle of the animation (usually unnecessary though).
Examples:
using Plots
@userplot CirclePlot
@recipe function f(cp::CirclePlot)
x, y, i = cp.args
n = length(x)
inds = circshift(1:n, 1 - i)
linewidth --> range(0, 10, length = n)
seriesalpha --> range(0, 1, length = n)
aspect_ratio --> 1
label --> false
x[inds], y[inds]
end
n = 150
t = range(0, 2π, length = n)
x = sin.(t)
y = cos.(t)
anim = @animate for i ∈ 1:n
circleplot(x, y, i)
end
gif(anim, "anim_fps15.gif", fps = 15)