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A first look at GIMPs Free (Cage based) transform tool using Green Coordinates!

By at 2010-11-01 17:19:21 UTC, last updated over 12 years ago. CC BY-NC License

The Cage Transform-tool (which is an equivalent to Adobe Photoshop’s Free Transform tool) uses a polygone instead of a (normal) rectangle to transform parts of an image.

How does the tool work?

  • Open an image you want to deform
  • Choose the new Cage-Tool and place a polygone (like the paths tool) over the parts you want to transform
  • Close the polygone by hitting the first point. The tool then switchs to the transform mode
  • Move the points of the polygone and the below image is transformed accordingly.
  • Simple and just awesome ;)

Video & Information

The tool was developed last summer during Googles Summer of Code 2010 by Michael Muré who did an excellent job as it seems because the tool works very good and seems to be almost finished.

To see how this works we’ve just created a 1-minute video showing the tool in action ! (there is no audio in this video)

The tool is not found in the master branch of the current GIMP development, it has a seperate branch named soc-2010-cage-2. If you want to try it out you need to checkout this seperate branch. Hopefully it will make the way into 2.8 once it is released (I remember that there were some licence issues/problems for the green coordinates). The tool is now in the master branch of current GIMP development, so it will come with GIMP 2.8.

Enjoy the video, the new tool and big thanks to the author of the tool itself: Michael Muré !


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Carlos F. Ruiz Laos
over 10 years ago

Gracias... lo estuve esperando tanto tanto tiempo. Son gente excepcional, definitivamente.

almost 12 years ago

Than you very much devvv

devvv member for almost 17 years devvv 1475 comments
almost 12 years ago

floadsds: Go to the downloads page and download GIMP 2.7.2 (2.7 is however a develeopment version, so expect it to crash sometimes). the cage tool is included from 2.7.2 and above versions!

almost 12 years ago

How can i download it.

mikethedj4 member for over 12 years mikethedj4 12 comments
over 12 years ago

I don't see why this should be a separate tool. I think this should just be an update of the perspective tool. I mean it makes sense, but don't get me wrong I LOVE this update, and it'll become a HUGE help instead of hafting to use the perspective tool or/with the iWarp filter, but I really just see a need to make this either an update to the perspective tool, or just take the perspective tool out, and put that in.

over 12 years ago


over 12 years ago

very nice job!

devvv member for almost 17 years devvv 1475 comments
over 12 years ago

There is a discussion about a Liquify tool, that can maybe use the same or half of the code that was written for the cage tool. but this will not come with GIMP 2.8 then ;)

over 12 years ago

Very nice, now how about a Warp Brush/Liquify Tool?

redforce member for almost 17 years redforce 230 comments
over 12 years ago

Update: The cage tool has been merged into the master branch, so it will come with GIMP 2.8! :)
Thanks to MrArkadin for the hint!

over 12 years ago

what a cool tool! thanks for the video, can't wait to see it in GIMP.

over 12 years ago

I'm getting horny when I see these new GIMP stuff ... kudos to Michael

devvv member for almost 17 years devvv 1475 comments
over 12 years ago

We just discovered Michael Muré's blog:

Some parts are also available in English:

redforce member for almost 17 years redforce 230 comments
over 12 years ago

Will probably come with GIMP 2.8:

over 12 years ago

Seem very good - excellent even :)

However, are you intending to post a link to anything or a 'how you can get to use this' at some point?