skeleton relationship

[ruddle]

Hey,

In my vizard, there are 27 skel_xxx under the Bones. I'd like to know the parent child relationship of all these bones. Where can I find this information?

Now I use censor to get the position of the hands. Is there any simple way to figure out the position of arms based on the position of hands?

Thanks.

[farshizzo]

Hi,

Here is the bone hierarchy for the standard Vizard avatars:

skel_Center
  skel_Pelvis
    skel_Spine
      skel_Spine1
        skel_Spine2
          skel_Spine3
            skel_Neck
              skel_Head
                skel_Jaw
              skel_ShoulderL
                skel_ArmLU
                  skel_ArmLL
                    skel_HandL
                      skel_HandLF
              skel_ShoulderR
                skel_ArmRU
                  skel_ArmRL
                    skel_HandR
                      skel_HandRF
      skel_LegLU
        skel_LegLL
          skel_FootL
            skel_FootLToe
      skel_LegRU
        skel_LegRL
          skel_FootR
            skel_FootRToe

In Vizard 3.0, you can determine this at run-time.

Vizard does not come with any inverse kinematics (IK) features. You will have to calculate this manually. Does your sensor only provide the position of the hand, or the orientation as well?

[ruddle]

My sensor only provide the position of the hand.

If I move the parent bone, does the child bone automatically move along with it? BTW, what's skel_HandLF? Finger?

Thanks.
ruddle

[farshizzo]

Hi,

The avatar skeleton is a hierarchical structure, so moving a bone will affect all children of that bone. The 'skel_HandLF' is the bone for the left hand fingers.

[ruddle]

Thanks.
Where can I find the information such as length of upper arm, fore arm?

[farshizzo]

Hi,

If you want to know the length of the upper arm you need to compute the distance between the shoulder bone and the elbow bone. For the forearm you will need to find the distance between the elbow bone and hand bone.

[mspusch]

It might be irrelevant, but Vizard R3 now can interface with Motionbuilder, which allows flawless and real-time integration of Mocap data from any Mocap system with the Vizard avatars. there are a bunch of videoclips at
http://www.worldviz.com/products/liv...ers/index.html