New plugin: Rhodonea

[Ottia Tuota]

Another offshoot of the Parametric curves. Draws rose-like figures.

To get the plugin, go to

http://kmarkku.arkku.net/

follow the link 'Applications', and click the second Download button there. That gives you a .zip file. Unzip it, put the .py file into your Gimp's plug-ins folder, and restart Gimp. The plugin 'Rhodonea' will be in

Filters/Render/Parametric curves/Special cases

If there are any problems, please tell me.

[rich2005]

Passing on a request from a Windows user. Would like a #!/usr/bin/env python  starting the plugins. 
They work fine in my linux installation but it does seem that in Windows / Gimp 2.10.18 & without the shebang, error messages are generated. This in a Win 10 VM

   

As you can (just) see the scripts do produce the curves.

[Ottia Tuota]

(03-24-2020, 07:20 PM)rich2005 Wrote: Passing on a request from a Windows user. Would like a #!/usr/bin/env python  starting the plugins. 
They work fine in my linux installation but it does seem that in Windows / Gimp 2.10.18 & without the shebang, error messages are generated. This in a Win 10 VM

As you can (just) see the scripts do produce the curves.

Certainly, but this is something beyond my knowledge. I am an old mathematician and know very little about computers. Could you kindly explain a little.

Are you saying that each plugin should have such line at the beginning? Then everything would be all right? No problem, I can do it, but since I don't understand this, I just have to rely on what  I am told.

I have Windows 10 and it seems to make no difference if that line is there or not. Did that Windows user try to add the line?
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Edit: Well, I added the line in Spiropath and Rhodonea. I did not change version numbers. If somebody tells that it is allright now, I'll add the line to my three other plugins.

[neurolurker]

Hello.  Thanks for sharing your work!  

"If somebody tells that it is allright now, I'll add the line to my three other plugins. "

EXECUTIVE SUMMARY: Ottia Tuota, things are allright now.

THE FINE PRINT: As I recall, if the initialization string [#!/usr/bin/env python] wasn't the first line in a python file, in a Windows setting at its most basic level, the plug-in didn't even show up in the designated GIMP menu.  Over three GIMP user forums I don't recall anyone offering a reason why the string position was necessary in Windows but not in other settings.  For myself, I simply started adding the string as a matter of routine when I would download a python script and the string wasn't there.

Tonight I find some things seem to have changed in the last couple of years but I've no idea whether the changes were in Windows or GIMP or Python or all three.  I removed the initializing line from "Rhodonea" and the plugin DID appear in the GIMP menu, but it also displayed errors, but it also ran.  When I replaced the string, Rhodonea appeared in the menu and ran without error messages.

Seems to be a bewildering "quirk" or "feature" for programmers and users alike.

[Ottia Tuota]

Thank you for your help, Rich and Neurolurker. I gather I'll take it just as another magic word to be used without any real understanding. Well, that is life.

I put here an example created with the Rhodonea plugin. I hope the colors are not too strong. If they are, please close your eyes quickly.