code: public void animate(GVRHybridObject target, float time)
      {
          if ((mSourceSkeleton == null) || !mSourceSkeleton.isEnabled())
          {
              return;
          }
          mapLocalToTarget();
          mDestSkeleton.poseToBones();
          mDestSkeleton.updateBonePose();
          mDestSkeleton.updateSkinPose();
      }
docs: /*
  Updates the color and depth map textures from the Kinect cameras.
  If a Skeleton is our target or a child, we update the joint angles
  for the user associated with it.