+- Gimp-Forum.net (https://www.gimp-forum.net)
+-- Forum: Other topics (https://www.gimp-forum.net/Forum-Other-topics)
+--- Forum: Gallery (https://www.gimp-forum.net/Forum-Gallery)
+--- Thread: Wrapping path to cylinder (/Thread-Wrapping-path-to-cylinder)
Wrapping path to cylinder - Ofnuts - 01-22-2023
Results of a script WIP to transform the sides, then ofn-bend-path to fit the vertical perspective. A bit contrived but still a lot easier than Map Object (because it still relatively WISIWYG) and since its done on the path the edges remain sharp.
How realistic does it look?
[attachment=9271]
RE: Wrapping path to cylinder - Ofnuts - 01-22-2023
Slightly better version in 3 steps:
- Apply wrap script
- Apply perspective transform to follow the slightly perspective induced conical shape of the mug
- ofn-path-bend to follow borders.
[attachment=9272]
RE: Wrapping path to cylinder - Ofnuts - 01-22-2023
Script onanism... trying a more complex path, with a side rotation
[attachment=9273]
RE: Wrapping path to cylinder - Krikor - 01-23-2023
(01-22-2023, 06:20 PM)Ofnuts Wrote: Results of a script WIP to transform the sides, then ofn-bend-path to fit the vertical perspective. A bit contrived but still a lot easier than Map Object (because it still relatively WISIWYG) and since its done on the path the edges remain sharp.
How realistic does it look?
Visually the result looks very good!
I had a doubt regarding the curvature of the word CYLINDER.
[attachment=9276]
Regarding the curvature of the paths, this word was the one that most distanced itself from the paths.
Perhaps due to the tapering of the mug's geometry (wider at the top)?
In any case, it's just a question/observation.
RE: Wrapping path to cylinder - Ofnuts - 01-23-2023
The real mug is likely a perfect cylinder, but since it is shot slightly from above, the bottom is farther from the lens that the top, so it looks smaller, and you get a slightly conic shape. This old toolbox is a perfect 18cmx19cm square but shot from above it looks like a trapeze:
[attachment=9277]
And the square in front of it has an angle of nearly 97° in the picture.
This is why the second attempt has a perspective transform inserted since this is exactly what the perspective transform is supposed to fix:
[attachment=9278]
This also makes the bottom more curved than the top, but ofn-bend-path comes to the rescue, with the two envelope strokes following the top and bottom curvature, and two guides marking the corresponding diameters:
[attachment=9279]
Of course you can start by fixing the mug with a perspective transform, but this always gives a slightly artificial look (for instance, the top of the toolbox and the foot of the square would be very thin in a picture where the square is square).
RE: Wrapping path to cylinder - Krikor - 01-24-2023
Wow!
This was enlightening and illuminating.
My understanding of this type of editing seems to have gone up a notch.
Thanks for the very detailed explanations!
RE: Wrapping path to cylinder - Ofnuts - 03-07-2023
Binge-wrapping now that the script is done...
[attachment=9501]
RE: Wrapping path to cylinder - trandoductin - 03-08-2023
(03-07-2023, 08:23 AM)Ofnuts Wrote: Binge-wrapping now that the script is done...
Wow this plug-in looks awesome.
RE: Wrapping path to cylinder - Alan - 02-02-2024
(01-22-2023, 08:37 PM)Ofnuts Wrote: Script onanism... trying a more complex path, with a side rotation
Is there any video of how you did it please?
RE: Wrapping path to cylinder - Blighty - 02-02-2024
(02-02-2024, 09:41 AM)Alan Wrote: Is there any video of how you did it please?
It is done with a plug-in ofn-path-to-cylinder.py
See this thread
https://www.gimp-forum.net/Thread-ofn-path-to-cylinder
The first post has a link to the plug-in. The zip file contains the plug-in and docs in html format.