## Max # of markers in a trackable = 7 ?

sburden
Posts: 3
Joined: Tue Jun 12, 2012 7:07 am

### Max # of markers in a trackable = 7 ?

(Sorry if this question has been asked before; I didn't find a previous post in my brief search.)

Is the number of markers in a trackable limited to 7? Is there any way to extend this, or to create a hierarchy of trackables with joints connecting them?

I am using the Tracking Tools to record trajectory data from a six-leg robot. I would like to track each leg as well as a trackable for the body. Since each leg should get at least one marker (ideally 3+), I need at least 9 markers in a trackable, but ideally upwards of 20.

Thanks,
Sam

NaturalPoint - Mike
Posts: 1896
Joined: Tue Feb 01, 2011 8:41 am
Location: Corvallis, OR

### Re: Max # of markers in a trackable = 7 ?

Hello -

Yes, the maximum number of markers in a single rigid body is 7. This is due to the fact that with each additional marker the solve becomes exponentially more difficult. 7 is the cut off where rigid bodies can be solved without that process extending into the next frame.

We do not currently have a heirarchy system for rigid bodies, but it's a great idea.