Hi I would like to mirror the left hand's bones to the right hand's bones, I have constrained some of them and limit their rotation in one hand (I think I put the x-mirror too late, very late ) , however it seems x-mirror does not work, or not update ...so I have one hand with the constraint and the other have not any contraints. How can I mirror the constraint (location and rotacion ) from one hand to the other?


To do what you want it will be easier to use python. I wrote a script that copies constraint from bones with ".L" to corresponding bones with ".R"

import bpy
context = bpy.context
scene = context.scene
arm = bpy.data.objects["Armature"]
arm.select = True
bpy.context.scene.objects.active = arm
all_bones = bpy.context.selected_pose_bones
for bone in all_bones:
    if ".L" in bone.name:
        boneL = arm.data.bones[bone.name]
        boneR = arm.data.bones[bone.name.replace('.L','.R')]
        boneR.select = True
        boneL.select = True
        arm.data.bones.active = boneL
        for con in arm.pose.bones[boneR.name].constraints:
           con.subtarget = con.subtarget.replace('.L','.R')

Another way to do it without Python is to use the Copy Constraint, which involves manual work to be done, you select an object then add a Copy Constraint, then select which other object you want to copy the property from (location, rotation). So no need for paste constraint.

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  • $\begingroup$ another way? thanks by the way. $\endgroup$ – Reifus Rufus Feb 5 '17 at 3:54
  • $\begingroup$ @ReifusRufus answer updated. The good thing about the python way is that it's automatic, the other way involved doing everything manually. $\endgroup$ – Tak Feb 5 '17 at 3:59
  • $\begingroup$ I prefer manual for the rigging process, should I paste that code in the editor script? I do not a big fan of python . but I think I should paste the code and see what happened in an extra windows for the editor? $\endgroup$ – Reifus Rufus Feb 5 '17 at 4:38
  • $\begingroup$ @ReifusRufus It's up to you. To run the code, open a text editor, new, then paste the code and replace "Armature" with the name of your armature e.g "My_Armature" then run the script. This script will copy all constraints of bones ending with .L to bones with same name but .R $\endgroup$ – Tak Feb 5 '17 at 4:41
  • $\begingroup$ I converter my armature the "metarig" all the constraints that I need use the metarig as a target. so I need to put "metarig" instead ".armature" $\endgroup$ – Reifus Rufus Feb 5 '17 at 4:42

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