[Scilab-users] animation of multiple plots

[Tim Wescott]

I cannot remember the name of the application, but there is software out
there that will take a number of static images and compile them into
mpeg or other "movie" format.

I've done it, but it was long ago on a computer far, far away.  I'd have
to google for it, and my Google Fu is not something to write home about
-- try some variation on "animated movie from stills" or "jpeg to mpeg"
or some such.

On Tue, 2015-09-15 at 15:57 +0200, grivet wrote:
> 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
> 
> 
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> 

-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432