[Scilab-users] animation of multiple plots

[Antoine Monmayrant]

Le 09/15/2015 03:57 PM, grivet a écrit :
> Hi,
>
> I am trying to animate multiple plots. For instance, when modeling the 
> motion of a planet
> around the sun, I wish to plot, in one window, the planet's position 
> and, in another window, the tip of the velocity vector, both plots 
> evolving with time.
> I can do that in principle with the following algorithm.
>     for each time point
>         compute x,y,vx,vy
>         define he2 handle of the trajectory
>         define he6 handle of the velocity curve
>         drawlater()
>         subplot(1,2,1)
>             update trajectory: he2.children(1).data = 
> [x(t(1:i)),y(t(1:i))]
>         subplot (1,2,2)
>             update velocity: he6.children(1).data = 
> [vx(t(1:i)),vy(t(1:i))]
>         drawnow()
>         record gif image
>         update x,y,vx,vy
>     end
> Using imageMagick, I then combine all the gif's in an single animation 
> file.
>
> This process works on my computer. I can visualize the animation using 
> Irfanview,
> Chrome or Internet Explorer, but not Firefox which shows only the last 
> image.
> The situation gets worse when I try to post this animation on the Net: 
> no program
> that I know of can display the animation, they all display the first 
> image.
>
> I have written other animations which behave properly (see 
> https://grenoble-sciences.ujf-grenoble.fr/pap-ebook/grivet/liste-animations). 
> However, there is one,
> probably significant, difference: these working animations don't use 
> multiple windows.
>
> I would be very grateful for any suggestion on how to run two 
> animations side by side.
> Thank you in advance for your time and help.
> JP Grivet

Hi,

It does not sound like a Scilab issue, more a problem with ImageMagick/gif.
Anyway, you can send me a couple of gifs (a working one and a 
problematic one) and I'll try to have a look.

Cheers,

Antoine

>
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