relational armature constraints and export with python

Support Animation and Rigging
1

Hello, I just started working with blender and try to build a hand model for an interactive AR application.
I have two questions concerning constraint definition on armatures and export with python.

  1. I have limited and locked rotations on some joints. How can I read the locking state and the limits with Python. Neither the bone object nor the armature seems to have a constraint member.

  2. Is it possible to define constraints based on the state of different objects?
    I like to specify that the movement of two bones is related to each other. Say if bone 1 rotates alpha around x-axis, Bone 2 rotates 2/3 alpha around x-axis. How can I do this and how can I read the constraint in a python script.

Thanks for your help

2
  1. From:

http://members.iinet.net.au/~cpbarton/ideasman/BPY_API/index.html

limitmax and limitmin:

http://members.iinet.net.au/~cpbarton/ideasman/BPY_API/Pose.PoseBone-class.html

Constraints:

http://members.iinet.net.au/~cpbarton/ideasman/BPY_API/Constraint-module.html

  1. Use Driven Keys:

http://mediawiki.blender.org/index.php/Manual/PartIX/Driven_Shape_Keys

That is using the movement of one object or bone to drive a Shape but you can use it to drive the movement of any other object.

You might also look at Action Constraint:

http://download.blender.org/documentation/htmlI/ch16s08.html

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