I have a bone that I want the rotation around its own X axis limited to 220°.

I have checked "limit X", and set "min" to 0°, and "max" to 220°. Also set "convert" to "Local space".

When I rotate the bone, it is well limited as intended around its X axis, but beyond 180° it returns (jump) to the 0° position, until I rotate beyond 360° where it starts to rotate again.

How to allow the limitation to go beyond 180° ? What am I missing ?

Note : I tried different "rotation orders" (XYZ, Quaternion...) but nothing changed. And also tried to check "For Transform" in the constraint panel with no more luck.

up vote 5 down vote accepted

The values for the Rotation Limit Constraint are clamped 180 to -180. This is a known limitation. An example:

enter image description here

As soon as i try to rotate the bone beyond 180° the bone snaps back to 0°

You can find more about this in the Blender manual about Limit Rotation.

Note: There is a small chance that this limitation will be released some time in the future. You can find more about that in the bf-animsys mailing list.

  • Ok, thanks a lot for your time of research. I'll wait for this to be fixed... And in the meanwhile I won't limit the rotation at all :) – Polosson Sep 21 '14 at 16:17
  • I found that using Local Space instead of World Space can be used to work around this limitation... provided that the bones are set up to facilitate that. – Wolfer Jul 28 '15 at 19:30

If possible consider using the values -40 (minus) to 180 to get 220 degrees of rotation. Perhaps adding another bone may help to build up rotation in the style that suits you. The values are clamped 180 to -180 if I read this documentation correctly. I get the same interaction as you explained.

Here is a technical link http://www.blender.org/documentation/245PythonDoc/Constraint-module.html

  • Thanks. But, in the doc you linked, I read : "Used by Limit Rotation (LIMITROT) constraint: (...) XMAX (float): clamped to [-360.0,360.0]". And using -40° here doesn't help, because I have to limit also at 0° for "min" value... – Polosson Sep 20 '14 at 23:54
  • fyi: I have started a thread in the bf-animsys mailing list about that: lists.blender.org/pipermail/bf-animsys/2014-September/… – Gaia Clary Sep 21 '14 at 10:49
  • @GaiaClary Thanks for adding that clarity to the situation – atomicbezierslinger Sep 22 '14 at 0:27

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