On Thursday 04 August 2005 18:43, Axel Philipsenburg wrote:
> Hello folks!
> I've just now joined this mailing list, looking for some info from
> people who know the internals of the Gimp's plug-in system.
> The reason is, that I have a project in mind that I'd like to try
> to write as an Gimp plug-in, but I am not sure if it can be done.
> So before diving headlong into the source I though I'd rather ask
> if it's even doable. If so, then I'll start digging through docs
> and code. :)
> What I'd like to do is to write a plug-in that would make the Gimp
> a nice tool for 3D artists by showing a 3D object in a seperate
> window with the currently selected Gimp image as UV mapped texture.
> The 3D object would be loaded from a Wavefront OBJ file with all UV
> mapping coordinates and been displayed by using OpenGL.
> The only thing that gives me worries about this, is if the Gimp
> plug-in system would allow a seperate window to be constantly
> displayed and updated whenever a tool operation is finished so that
> the artist can practically see each brush stroke (or other tool
> usage) instantly on the 3D object once the tool has been used.
> If that is the case, then the only real work for the plug-in in
> would be to make a flattened copy of the currently edited image and
> send it as texture to the OpenGL part of the plug-in.
> Any comments on the idea or if this possible with using the Gimp's
> plug-in system?


Offically it is not possible.

That is: there is no way for the GIMP to call back your plug-in 
whenever an action is performed.

However nothing but the extreme deselegance of it can stop your 
plug-in of pooling the GIMP for image data every few seconds.

So, I'd say it is feasible. It won't be perfect, but would be 
functional enough.

Are you writing the 3D part? 
Maybe it is even possible to use blender for it. I do not know exactly 
how Python works with Blender - but it may be possible to write a 
script that is _both_ a blender script and a GIMP plug-in and get 
this working with less than 200 lines of code.

> Thanks a lot in advance.
> Bye Bye
> Axel
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