Entire muscle-tendon unit length vs. joint angle

[nicos1993]

Hello!

I am just experimenting with OSC to explore tweaking an existing model's muscle wrapping surface parameters/attachment points. I figured out how to plot a given muscle's moment arm with respect to a joint angle, but I am wondering if it is also possible to plot the entire muscle-tendon unit length with respect to a joint angle? (I can see that it is possible to plot the fiber and tendon lengths separately)

Thanks,

Nicos

[adamkewley]

Update: Total Length was added in #1141. If that meets your requirements @nicos1993 , then you can grab a green build from GitHub Actions once it comes through, or wait for the next release (roughly expected early December).

Hi @nicos1993 ,

By this, do you mean something like normalized_fiber_length (the output), or when you say "unit" do you mean that you want (effectively) the end-to-end length of the muscle (something like 2*tendon length + fiber length or similar) - effectively equivalent to watching the length output of the GeometryPath within the muscle?

[nicos1993]

Hello @adamkewley!

I was referring to the entire muscle's length, so the getLength output from GeometryPath as you mentioned.

It looks as though the build with the update has come through - I will try it and get back to you - thanks!

[nicos1993]

Works great! I downloaded the latest windows build.

[adamkewley]

No problem: that kind of thing is easy enough to add!