Problem motion capture Blender I’ve a problem with Blender, I have to make a feet and animate it using a .c3d file with the motion capture of the movements. 

But when I try to make the armature and assign the marker to the armature and I press the play, it’s like if the joint of the bones is not connected and they move free but they follow the markers and if I connect the joint and the bones not move.

Also I have tried to make an armature with the bones connected with the key E and they didn’t move. So I need to make a joint that let the bones follow the markers with an anatomical movement.

Could someone please tell me how I can find a solution for my problem?

My .blend file can be found here:
To me you will only need to Bones, one connecting the ankle with the heel and another connecting the heel with the toes.

First you need to construct the armature properly:


Shift+A add armature, then add a bone
Select the two markers 01, 04 to position in between, and align 3D cursor with Shift+S then Cursor to Selected, this will position the bone between the two markers.
Then enter edit-mode of armature and select the bone and Shift+S then Selection to Cursor
Select the markers 05, and align 3D cursor with Shift+S then Cursor to Selected
Then enter edit-mode of armature and select the second bone and Shift+S then Selection to Cursor


The second step is adding bone constraints:


For the first (root) bone use two Copy Location constraint with second on 50% influence to get in between position of two markers 01 and 04. Then add Damped Track to track marker 05
For the second bone use two Damped Track constraints with second on 50% influence to get in between position of two markers 02 and 03.


Result is shown as below:



The updated .blend file can be found here: