The problem this project solves is already solved in a cleaner and better integrated way using default Inkscape tools.
Please see this issue for an example of computing centroids, even for complex shapes with holes.
Documentation below is left intact as this project still functions as a relatively simple example of an Inkscape extension implementation.
Compute centroids for paths and shapes in Inkscape
There are two files, centroid.inx and centroid.py which must be copied into your Inkscape extensions folder. The exact location of the extensions dir can be found by opening Edit --> Preferences --> System and looking at the user extensions field.
Inkscape Centroid can be found under Extensions --> Generate from Path --> Centroid.... If you don't see it there ensure you've installed the files into the extensions directory for Inkscape and restarted Inkscape.
There are two options in the dialog:
- Number of linear segments per curve, default 100. The more linear segments used the more precise the centroid will be. Generally increasing the number of segments is only necessary for complex curves.
- Radius of output centroid, default 10. Controls how large the output "dot" used to mark the centroid is.
Inkscape Centroid assumes the following:
- The selected path(s) is closed
- The selected path(s) do not intersect
- If multiple paths are selected, there is one outer path which completely encloses the inner paths, and (1) and (2) hold true for each path
Multiple closed paths that are not contained within each other are not supported.
This is a project I created quickly to satisfy my own use case. I welcome any improvements in features, documentation, or otherwise!
| Graphic | Source |
|---|---|
| Apple | By Picol.org - http://picol.org/, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=39292830 |
| Heart | By Heart_left-highlight_jon_01.svg: Jon Phillipsderivative work: Bagande (talk) - Heart_left-highlight_jon_01.svg, CC0, https://commons.wikimedia.org/w/index.php?curid=6797194 |
| Puzzle | By https://en.wikiversity.org/wiki/User:Rob-nowman - https://en.wikiversity.org/wiki/File:Wikiversity-Mooc-Icon-Associated-units.svg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=36754677 |
| Frog | By ХЕРАЛДИКА СССС - https://www.shareicon.net/toad-toads-amphibian-biology-animals-frogs-702138, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=71051987 |
| Bat | By Christopher T. Howlett, from The Noun Project, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=18497274 |
| Cheese | By Carol Liao/toicon.com, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=60818563 |