Hi Dan
I have taken a look on your model “PluginGaitWhileWorking.any” and resolved
two issues; I have uploaded the file PluginGaitV2.zip
1 In the file PluginGaitJointAndDrivers.any there was a misaligned bracket!
This can produce errors like “AnyFolder not expected” or similar. The error
was located where you had out commented the SacrumLy measureorganizer, you
needed to out comment a few lines more in order to have out commented the
entire driver.
When getting this kind of error you can always mark up the entire text in
the file and press Alt+F8 this will auto indent the text and it possible to
check if the brackets match.
I needed to out comment the AsisZDrv also, because the measure organizer it
used is now out commented, you need to replace this driver with another
driver which drivers the height of the pelvis.
2: In the file PlugInGaitMotionTrackerInclude.any I have removed the last
marker listed, there is not data in the file P16.txt which it is using.
These changes make the model load, but it will not be able to run before the
removed driver is replaced by an equivalent one 
Best regards
Søren, AnyBody Support
From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of Daniel Leib
Sent: 25. september 2006 16:06
To: anyscript@yahoogroups.com
Subject: Re: [anyscript] Re: Using a C3D file to drive a simulation
Hi Christian,
I have no idea why the Word file didn’t show up (probably a BSU firewall
issue, that thing’s been driving me nuts), but I posted the zipped file to
the yahoo group file depository. The name is PlugInGait.zip . Thanks for
taking a look at it, I tried to figure out the problem over the weekend and
got nowhere.
A couple notes on it:
The error message I keep getting is …twolegs\calibrationsequence.any
‘AnyFolder’ not expected (5)
I had to comment out the sacrum point and marker as our standard marker set
doesn’t use it; the points we use are (right and left): Asis, Psis, Thigh
(middle of thigh), lateral knee, mid shank, and the three heel/foot markers
are the same. It makes for 16 markers, which I’m pretty sure I have defined
correctly on the model though I could be a little off. I was worried that
the removal of the sacrum might pose a problem, but after looking through
all the folders I couldn’t see anything that should return this particular
error.
I’m also not sure how to define the marker points globally as you mentioned,
but I’ll look through the tutorials on those commands, I haven’t gotten that
far in the learning process yet 
How did your lab get the motion capture
output in the format you did, though? It looks like it’d be a lot easier to
customize the model per individual using that technique.
Thanks for your help, I know I have a lot of questions
-Dan
AnyBody Support <support@anybodytech <mailto:support%40anybodytech.com>
.com> wrote:
Hi Daniel
You are welcome:D
I can’t see anything attached? You can just put it in the mail or post
it as a file?
Regarding to the coordinate systems, the marker position can be made
in global coordinates.
You can use a AnyKinLinear to measure the translation between the
global refrence frame and your local. And a AnyKinRotational to
measure the rotation.
You can zip the model and upload it to the file share and then we can
have a look:D
But please send the error message you are getting.
Best regards
Christian, AnyBody Support
— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
Daniel Leib <daniel.leib@…> wrote:
>
> Hi Christian,
>
> Thanks for the quick reply - I’ll take a look at the cycling
specific papers as soon as I get a chance.
>
> I’m pretty sure I understand what you’re saying about altering the
bike and seeing how that effects change in the rider, but I’ll wait
for the webcast on Monday before I ask any more questions on that as
they may be answered.
>
> I have spent the last couple days trying to import motion capture
data from a ViCon MX system to use to drive the Gait3D model and have
run into a couple problems. The first is general syntax problem that
I just can’t figure out; attached is a screenshot of the workstation
with the error reported and the code near where it was reported.
>
> The second is regarding the compatability of the ascii .txt
created by the ViCon system and the way the markers are referenced
within the model. If I understand it correctly, the marker placement
in the model is based on a local reference frame where the the markers
are placed {x,y,z} from the segment’s center of mass? The ViCon
Workstation output is in regards to the global reference position,
however, and this makes it extremely difficult to assign the markers
to the correct position on the model unless I’m missing something. I
looked at the Px.txt files, and the numbers seem to be generated in
the same format as the model wants to use them; how did you accomplish
this? Does your motion capture system output the ascii file in that
format by default, or did you have to do something in particular to
the data?
>
> Thanks for any help you can offer,
>
> Dan
>
> AnyBody Support <support@…> wrote:
> Hi Daniel
>
> Ok. I see.
> You want to enhance some parameters on the bike. Instead of optimizing
> with respect to the output as you want, AnyBody gives you the
> possibility to optimize with respect to the muscle activity. You can
> set up the bicycle model, drive it with motion capture and but a
> resistance on the crank. Then you can change the parameters you want,
> like seat height, pedal arm length etc. and see if the muscle activity
> is decreasing or increasing.
>
> You could take a look at these two papers:
> http://anybody. <http://anybody.aau.dk/pdf/RioFullPaper.pdf>
aau.dk/pdf/RioFullPaper.pdf which describes the
> optimization of a bicycle by using springs to remove the so called
> “dead center”.
>
> When it comes to the modeling of the walk. You can easily take a
> model, drive it with some kind of motion capture and force plate data
> and then try to move a muscle and see how that effects the surrounding
> muscles during the gait.
>
> Anybody is a inverse dynamic tool, but you can synthesize movements
> with it, and there will be held a webcast with the title: “How to
> synthesize posture and movement with inverse dynamics” The 25th of
> September.
> It is not possible to drive the model with EMG.
>
> Hope I answer you questions, else feel free to write again:D
>
> Best regards
> Christian, Anybody Support
>
> — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
Daniel Leib <daniel.leib@> wrote:
> >
> > Hi Christian,
> >
> > There are two main things we’re looking at using modeling for
> right now; performance enhancement and predicting gait parameters.
> >
> > Cycling is what we’re going to focus on first in regards to
> performance because we figure it should be one of the easiest to learn
> since the bike provides a number of constraints. What we’d like to be
> able to do is take motion capture data and/or EMG data and use it to
> drive the model to accurately predict what the effects on power output
> and other such parameters would be if we changed the seat height,
> lengthened the crank slightly, changed the position of the cleats on
> the shoe, etc.
> >
> > The same type of idea is what we’d eventually be able to do with
> gait. A good example would be predicting the effects of surgically
> moving a tendon (such as rectus fem to the lateral knee for a CP
> patient with stiff-legged gait) on gait parameters, ultimately leading
> to helping the patient walk fairly normally.
> >
> > Would the software be able to handle these tasks assuming the
> programmer is up to the challenge?
> >
> > Thanks,
> >
> > Dan
> >
> > AnyBody Support <support@> wrote:
> >
> > Hi Daniel
> >
> > Welcome to the group.
> >
> > Jep, if you have a background in c++/Java everything should be good:D
> >
> > If you would like to drive a bicycling model from motion capture data,
> > you can just do so. The data you got from the ViCon Nexus platform is
> > kinematic motion capture data, right?
> > In principle you can take the bicycle model from the repository and
> > drive it with the kinematic data. I am not sure if I understand what
> > you need the forward dynamics for? Could you explain some more about
> > what you want to do?
> >
> > Best regards
> >
> > Christian, AnyBody Support
> >
> > — In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“daniel.leib” <daniel.leib@> wrote:
> > >
> > > Hi everyone,
> > >
> > > My name’s Dan, I’m new to the group. I’m a graduate student at Ball
> > > State looking to take the leap into modeling and AnyBody looks
to be
> > > an intuitive interface for someone like myself with a little
training
> > > in C++/Java. So far I’m using the demo, and the tutorial has been
> > > VERY well written and useful.
> > >
> > > I do have some concern about how well the software will suit the
> > > potential desired use of the model, though, which is to drive a
> > > cycling model using information gathered from the ViCon Nexus
> > > platform. I used the search function and only found one message on
> > > the topic of forward dynamics. I know the program right now
works in
> > > an inverse dynamic fashion, but does anyone know if it will soon be
> > > possible to feed in kinetics to drive the model? If not, which
> > > modeling environment would be the best alternative for that sort of
> > > purpose?
> > >
> > > Thanks for any help,
> > >
> > > Dan Leib
> > >
> >
> >
> >
> >
> >
> >
> > ---------------------------------
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> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
>
> ---------------------------------
> Stay in the know. Pulse on the new Yahoo.com. Check it out.
>
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>
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