Search found 2255 matches

by Ayman Habib
Mon Nov 26, 2007 12:47 pm
Forum: OpenSim
Topic: OpenSim running
Replies: 2
Views: 936

RE: OpenSim running

<t>Dear Dana,<br/> <br/> I think you have more than one application called OpenSim on your machine somehow. Please launch the application from the desktop shortcut or start menu to make sure you get our application!. <br/> <br/> The call stack you referred to is not in our code..<br/> <br/> Best,<br...
by Ayman Habib
Wed Nov 21, 2007 11:30 am
Forum: OpenSim
Topic: Disabling gravity
Replies: 4
Views: 1063

RE: Disabling gravity

<t>Dan, <br/> <br/> I reproduced and fixed the problem related to trying to run a forward simulation without external loads. The fix will be in version 1.1 which will be out shortly. For what you have I'd suggest you set the values of the ground reaction forces in the data files to 0. and let OpenSi...
by Ayman Habib
Tue Nov 20, 2007 12:32 pm
Forum: OpenSim
Topic: Disabling gravity
Replies: 4
Views: 1063

RE: Disabling gravity

<t>Hi Daniel, <br/> <br/> Gravity is specified in the model's osim file under the xml tag <gravity>:<br/> <br/> <gravity> 0.00000 -9.80665000 0.00000</gravity><br/> <br/> You can use a text editor to modify it or you can open the file using<br/> Edit->File (.osim) <br/> Browse for the model file (.o...
by Ayman Habib
Tue Nov 20, 2007 12:26 pm
Forum: OpenSim
Topic: Building objects for human interaction
Replies: 1
Views: 562

RE: Building objects for human interaction

<r>Dear Daniel,<br/> <br/> VTK has some converters to import different file formats including STL. You'll need to check kitware's site to find how these are packaged or if they're available in a product that you can download and use directly. Here's a faq page from kitware related to the issue:<br/>...
by Ayman Habib
Fri Nov 16, 2007 3:58 pm
Forum: OpenSim
Topic: RRA and CMC
Replies: 21
Views: 6811

RE: RRA and CMC

Dear Daniel,

Can you please send me the details of how you reproduced the problem in OpenSim 1.0 with our own model and data files so that I can investigate?

Thanks,
-Ayman

by Ayman Habib
Mon Nov 05, 2007 5:12 pm
Forum: OpenSim
Topic: DIRECT CINEMATIC AND SYMULINK
Replies: 1
Views: 814

RE: DIRECT CINEMATIC AND SYMULINK

<t>Dear Fabio,<br/> <br/> 1) It is possible to run a forward simulation to predict movement given a set of muscle excitations. In addition to the muscle excitations, you need to specify the initial states of the model, which include not only the joint angles, but also the muscle activations and fibe...
by Ayman Habib
Fri Oct 12, 2007 10:29 am
Forum: OpenSim
Topic: Saving plots
Replies: 0
Views: 519

Saving plots

<t>>>I am wondering if I can output the plot to save as a file?<br/> <br/> We understand the value of the feature to save and restore plots as is, and we're working on implementing it. In the meantime users can do the following in OpenSim 1.0:<br/> <br/> - Export the plot to an image (png, postscrip...
by Ayman Habib
Fri Sep 14, 2007 8:46 am
Forum: OpenSim
Topic: FAQ question: Inverse Kinematics
Replies: 2
Views: 738

RE: FAQ question: Inverse Kinematics

The inverse kinematics solution minimizes a weighted sum of squared errors using IPOPT, a non-linear optimizer.
by Ayman Habib
Thu Sep 13, 2007 4:42 pm
Forum: OpenSim
Topic: FAQ question: Inverse Kinematics
Replies: 2
Views: 738

FAQ question: Inverse Kinematics

What algorithm is used for solving the inverse kinematics problem in OpenSim?
by Ayman Habib
Fri Sep 07, 2007 5:00 pm
Forum: OpenSim
Topic: FAQ question: Model building/modification
Replies: 2
Views: 899

RE: FAQ question: Model building/modification

<t><br/> As of OpenSim 1.0, the only model modifications available from the GUI are changes to muscles.<br/> <br/> The GUI is not yet in place to let you add degrees of freedom (coordinates) and adjust their properties, or the properties of any other model components other than muscles. <br/> <br/> ...