Search found 79 matches
- Wed Jun 01, 2016 6:20 am
- Forum: OpenSim
- Topic: python API : -add a marker to a model
- Replies: 3
- Views: 992
Re: python API : -add a marker to a model
Fabien, I'm not sure what is missing? I checked and the following works from the scripting page: creates a new marker set when one does not exist, adds a marker, them overwrites it: myModel=modeling.Model("tug_of_war.osim") gndBody=myModel.getBodySet().get("ground") newMarkerSet=modeling.MarkerSet()...
- Tue May 31, 2016 9:13 am
- Forum: OpenSim
- Topic: python API : -add a marker to a model
- Replies: 3
- Views: 992
Re: python API : -add a marker to a model
Fabien, I run into this problem periodically and I believe it has something to do with you overwriting a already instantiated reference. I can't remember how I get around that, but I do know there are some nice example code on how to create marker sets from scratch. Scroll down to "Building a Marker...
- Tue May 31, 2016 8:57 am
- Forum: OpenSim
- Topic: Set ForceSet to AnalyzeTool-Instance with Python API
- Replies: 1
- Views: 504
Re: Set ForceSet to AnalyzeTool-Instance with Python API
There is a post on the forum (could not quickly find it) that says not all of the Static Opt methods were made available as of 3.3 (but are supposed to be in the next coming release). The work around I came up with was to make a simple Static Opt xml template file (basically one with minimal options...
- Sun May 22, 2016 9:08 am
- Forum: OpenSim
- Topic: Speed of Video Recording
- Replies: 3
- Views: 667
Re: Speed of Video Recording
Here is some MATLAB code that is a work around: viewtopicPhpbb.php?f=91&t=6029&p=15342&start=0&view=
Brad
Brad
- Sun Apr 10, 2016 7:38 am
- Forum: OpenSim
- Topic: Matlab crash using API functions
- Replies: 4
- Views: 1201
Re: Matlab crash using API functions
Clara,
Have you looked at Dominic Farris's prescribeMotionInModel.m? I have used (variations) of it successfully:
https://github.com/opensim-org/opensim- ... nInModel.m
Regards,
Brad
Have you looked at Dominic Farris's prescribeMotionInModel.m? I have used (variations) of it successfully:
https://github.com/opensim-org/opensim- ... nInModel.m
Regards,
Brad
- Sun Apr 10, 2016 7:06 am
- Forum: OpenSim
- Topic: Jacobian / getMatterSubsystem
- Replies: 4
- Views: 1050
Re: Jacobian / getMatterSubsystem
Bas, Availability of the Jacobian is a project that I am interested in; we use it in optimization for predictive modeling. For now we calculate it though using finite differences. Brian Umberger and Leng-Feng Lee wrote a nice paper that does something similar. But even better, they shared the code: ...
- Mon Apr 04, 2016 5:15 pm
- Forum: OpenSim
- Topic: Getting Joint Location in Matlab
- Replies: 7
- Views: 1347
Re: Getting Joint Location in Matlab
Try this: import org.opensim.modeling.* osimModel= Model(modelFile1); p=Vec3(); % This creates an empty opensim vector which will contain the location in the parent frame osimModel.getJointSet().get("ankle_r").getLocationInParent(p); %Now convert into native MATLAB double pval(1)=p.get(0); pval(2)=p...
- Mon Apr 04, 2016 1:36 pm
- Forum: OpenSim
- Topic: Wrap Object Set with API
- Replies: 8
- Views: 2152
Re: Wrap Object Set with API
Malavika,
I did not get any further than my responses here as my reason for doing this went away due to taking a different approach unrelated to the wrap surface. Since then I have not needed to programmaticly create a wrap surface.
Regards,
Brad
I did not get any further than my responses here as my reason for doing this went away due to taking a different approach unrelated to the wrap surface. Since then I have not needed to programmaticly create a wrap surface.
Regards,
Brad
- Mon Mar 14, 2016 1:47 pm
- Forum: OpenSim
- Topic: Follow Markers
- Replies: 2
- Views: 748
Re: Follow Markers
Here is a MATLAB code snippet (easily made into a function) that gets marker locations via the API. Set the coords (q) and it creates a matrix with marker locations (markerLoc) in the ground body CS: % Set the angles of the coordinates (rad). In Arm26, there are 2 coords: q=[0 0]; % Load Library imp...
- Thu Mar 10, 2016 11:46 am
- Forum: OpenSim
- Topic: Using the Forward Tool with Matlab
- Replies: 1
- Views: 596
Re: Using the Forward Tool with Matlab
Nihar, I believe you have to do the following to use the Forward Dynamics tool (or at least this is the way that works for me): 1) Your controller needs to be written in C++ and compiled and registered with OpenSim (Let OpenSim know it exists). 2) Add the controller to your model (.osim file) 3) The...