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All Add-ons

Add-on Shape Fitter
Shape Fitter

Fit primitive shapes to verticies.
Add-on by pfalkingham
About What's New Reviews Version History
Walk through of the shapeFitter addon

An add-on to fit primitive shapes to selected vertices. Current handles Sphere, Plane, and Cylinder.

Cylinder can be fit either to a single selection of vertices or two (added separately in the UI).

Initially developed for Bones and biomechanics, likely useful for other purposes.

Sphere - select verticies that either sit on the surface of a sphere, or define it's volume.

Plane - Will fit a plane through the centre of the selected verticies, aligned with the two major axes.

Cylinder - Will fit a cylinder to a selection of verticies that lie on the side of the cylinder. Note that principle component is uses to orient the cylinder, so if you select verticies across the cylinder, it will be oriented wrong.

2 condyle cylinder - will take two sets of verticies that lie on the cylinder surface and fit a cylinder. Idea for e.g. the distal end of limb bones.


What's New

1.2.0 May 6th, 2025

Added local axes/pivot orientation for plane and cylinder.

See all versions


Permissions

This extension does not require special permissions.

Developer
pfalkingham
Rating
(1)
Version
1.2.0
Updated
1 mo
Published
April 29th, 2025
Downloads
737
Size
9.4 KB
Compatibility
Blender 4.2  and newer
Website
github.com/pfalkingham/blenderShapeFitter
Report Issues
github.com/pfalkingham/blenderShapeFitter
License
GNU General Public License v3.0 or later
Modeling Mesh Object
...or download and Install from Disk
  • 9.4 KB

Reviews

See all
  • Alexander-Bicukow
  • v1.1.0
  • 1 mo

it's nice but.. please, add cube as an option for shape, and local/global orientation parameter...

  • pfalkingham replied
  • 1 mo

I've taken a look into this for you. Next version will have a properly aligned local axis that's oriented with the object (Z normal for plane, Z along long-axis of cylinder, obviously not applicable to sphere).

However, turns out the maths for cube-fitting is really complex (more so than the shapes already covered), and possibly not doable in blender without relying on external dependancies (which I don't want to do).

I implemented a couple of algorithms for fitting cubes/cuboids and they were, to be frank, rubbish, and it'd be way quicker to just hand align a cube. I'll keep an eye out, but don't expect cube fitting anytime soon, sorry.

v1.2 with oriented local axes uploaded

3.0

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