Getting current bone loc/rot in 2.5

Coding Python Support
1

I’m using Blender 2.5 and trying to figure out how to get a bone’s current keyframe location/rotation.

I’ve been looking around the API, but can’t seem to find anything. Can anyone help?

2

it depends; what do you mean by your use of the word “current”?

3

Hi Mardok45

For the following you will need to replace “Armature” with the name of your armature object, and “jaw” etc

posebone = bpy.objects[“Armature”].pose.bones[“jaw”] will give you reference to the jaw bone… you can get its x location with posebone.location[0] for instance.

You can also access action fcurves using bpy.objects[“Armature”].action.fcurves. Each fcurve has a data_path property and an array_index. So for the above there will be an fcurve with ‘pose.bones[“jaw”].location’ as a data_path and array_index 0. The fcurve has a handy evaluate method that lets you get the value for any given frame. There is also a keyframe_points collection in the curve which has the frame,value pairs for the keyframes.

Lastly take a look at this thread http://blenderartists.org/forum/showthread.php?t=204516 the visual transform matrix there will give you the “final product” if your bones are involved in IK and the like.

4

AAAARRRRGH! I didn’t see the pose module! Hours of looking and it was right under my nose.

Thanks a lot batFINGER.

5

would someone call this a bug?
In blender-2.55, if i insert keyframes for the visual-loc - the location based on a constraint is set - but not for a parent-setting with crtl-P.
Shure there is the parent-constraint, but there still seems a different inside of blender.
For example, i still use the parenting to a curve as follow path instead of the constraint, because if i use the constraint i have to add manually the speed-fcurve for the path-time-evaluation.
And i just tried it with revision 33830, the “child-of”-constraint can not be recorded
with visual-loc … for me. Am i doing something wrong?
If i use the “copy-loc”-constraint, it works.

edit: there is a difference between Object and single-bones in posemode …
if i use a object like the default cube, i get entries in the fcurve visual-location,
but the animation does not use those entries … -? any clues?

6

Hi,

I’m quoted so i feel i need to respond … but am a little confused. I havent used visualLoc/Rot etc much at all. My understanding is that visual takes into account the constraints… or more to the point gives the properties of where it lies on your screen in your scene so to speak.

there is a difference between Object and single-bones in posemode …
if i use a object like the default cube, i get entries in the fcurve visual-location,
but the animation does not use those entries … -? any clues?

I’d need an example.