[Scilab-users] How can I make a movie that shows how the sphere rotates around the z-axis?

[Heinz Nabielek]

No. How to do it?

I have downloaded.... but then what?


/Users/heinz/Downloads/animaGIF_1.0_61-bin
-rw-rw-r--@    1 heinz  staff    1386 Feb 28  2020 DESCRIPTION
-rw-rw-r--@    1 heinz  staff  407469 Jul 22  2019 animaGIF_1.0.pdf
-rw-rw-r--@    1 heinz  staff     396 Jul 21  2019 changelog.txt
drwxrwxr-x@    3 heinz  staff      96 Feb 28  2020 etc
drwxrwxr-x@    3 heinz  staff      96 Feb 28  2020 jar
-rw-rw-r--@    1 heinz  staff   22677 Jul 21  2019 license.txt
-rw-rw-r--@    1 heinz  staff     594 Feb 28  2020 loader.sce
drwxrwxr-x@    6 heinz  staff     192 Feb 28  2020 locales
drwxrwxr-x@   10 heinz  staff     320 Feb 28  2020 macros
-rw-rw-r--@    1 heinz  staff     539 Jul 21  2019 readme.txt
drwxrwxr-x@    5 heinz  staff     160 Feb 28  2020 tests
-rw-rw-r--@    1 heinz  staff     990 Feb 28  2020 unloader.sce

> On 02.07.2021, at 23:25, Stéphane Mottelet <stephane.mottelet at utc.fr> wrote:
> 
> Heinz did you manage the offline install of animaGIF ?
> 
> Le 02/07/2021 à 23:03, Heinz Nabielek a écrit :
>> Thanks. The rotating graphics works well, but on my Mac with Scilab 6.1,  already the first line "scicv_Init()" bumps...
>> What to do?
>> Heinz
>> 
>> 
>> 
>>> On 02.07.2021, at 10:50, P M <p.muehlmann at gmail.com> wrote:
>>> 
>>> .... the rotation can be realised by changing   "rotation_angles"  in a for loop
>>> 
>>> .. creating the movie...maybe use scicv?
>>> 
>>> in a for loop
>>> - set rotation angle
>>> - display the graph
>>> - save the actual graph as an image
>>> - reload the image
>>> - add image to frame
>>> 
>>> 
>>> see code below:
>>> Only draw back here:   the avi-file could not be played afterwards..and had only 6kB in size.
>>> 
>>> I guess, this is because ffmpeg is missing on my PC, but I am pretty sure that some scicv expert could solve this issue.
>>> 
>>> BR
>>> Philipp
>>> 
>>> scicv_Init();
>>> 
>>> 
>>> 
>>> R=23;
>>> N=14500;
>>>  
>>> r=grand(N,1,'unf',0,R);
>>> phi=grand(N,1,'unf',0,2*%pi);
>>> theta=grand(N,1,'unf',0,%pi);
>>> x=r.*cos(phi).*sin(theta);
>>> y=r.*sin(phi).*sin(theta);
>>> z=r.*cos(theta);
>>> 
>>> 
>>> 
>>> f = figure();
>>> f.background = 8;
>>> scatter3d(x,y,z,msizes=4);
>>> a = gca();
>>> 
>>> 
>>> 
>>> // create the avi file
>>> videoWriter = new_VideoWriter("F:\testAvi.avi", CV_FOURCC('M', 'P', '4', '2'), 25, [400, 400]);
>>> 
>>> 
>>> 
>>> for i = 0:360
>>> 
>>>     a.rotation_angles = [60, i];
>>> 
>>>          // save the graph as image
>>> 
>>>     xs2png(f.figure_id, 'F:\testImg.bmp');
>>> 
>>>          // read image
>>> 
>>>     img = imread('F:\testImg.png', CV_LOAD_IMAGE_GRAYSCALE);
>>> 
>>> 
>>>     // add image as frame to avi
>>> 
>>>     VideoWriter_write(videoWriter, img);
>>> 
>>> 
>>> 
>>> end
>>> 
>>> 
>>> 
>>> // free avi from memory
>>> delete_VideoWriter(videoWriter);
>>> 
>>> 
>>> 
>>> 
>>> 
>>> Am Fr., 2. Juli 2021 um 00:22 Uhr schrieb Heinz Nabielek <heinznabielek at me.com>:
>>> Colleagues:
>>> 
>>> the code below generates 14,500 random points in a spherical volume.
>>> How can I make a movie that shows how the sphere rotates around the z-axis? And how do I store the animation? animaGIF does not exist on my Scilab 6.1 in my macOS 10.15.7
>>> 
>>> Heinz
>>> 
>>> 
>>> R=23;
>>> N=14500;
>>> r=grand(N,1,'unf',0,R);
>>> phi=grand(N,1,'unf',0,2*%pi);
>>> theta=grand(N,1,'unf',0,%pi);
>>> x=r.*cos(phi).*sin(theta);
>>> y=r.*sin(phi).*sin(theta);
>>> z=r.*cos(theta);
>>> scatter3d(x,y,z,msizes=4);
>>> gca().rotation_angles = [60, 60];
>>> 
>>> 
>>> ______________
>>> Dr Heinz Nabielek
>>> Schüttelstrasse 77A/11
>>> A-1020 Wien, Österreich
>>> Tel +43 1 276 56 13
>>> cell +43 677 616 349 22
>>> heinznabielek at me.com
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> 
> -- 
> Stéphane Mottelet
> Ingénieur de recherche
> EA 4297 Transformations Intégrées de la Matière Renouvelable
> Département Génie des Procédés Industriels
> Sorbonne Universités - Université de Technologie de Compiègne
> CS 60319, 60203 Compiègne cedex
> Tel : +33(0)344234688
> http://www.utc.fr/~mottelet
> 
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