simtk.org

Posted: **Tue Jan 28, 2020 9:49 pm**

I need to change the value of an object's property programmatically using MATLAB API

The object is a custom controller defined in a plugin dll, so I can't use safeDownCast to use concrete methods, as explained here:
viewtopicPhpbb.php?f=91&t=7281&p=19121&start=0&view=

I can load a model containing the custom controller just fine and access the gain I want to adjust as an AbstractProperty

Code: Select all

controller=model.getControllerSet.get('CustomReflexController');
gain=controller.updPropertyByName('gain');

The only two relevant AbstractProperty methods i see in methodsview() are updValueAsObject(index) and setValueAsObject(index) neither of which seem to work:

Code: Select all

gain.updValueAsObject(0)=5

Unrecognized property 'updValueAsObject' for class 'org.opensim.modeling.AbstractProperty'.

Doesnt look like correct MATLAB syntax, but was suggested in another post
viewtopicPhpbb.php?f=91&t=10913&p=30255&start=0&view=

Code: Select all

gain.updValueAsObject(0)

Java exception occurred:
java.lang.RuntimeException: SimpleProperty<T>::updValueAsObject(): property gain is not an Object property.
at org.opensim.modeling.opensimModelJNI.AbstractProperty_updValueAsObject__SWIG_0(Native Method)
at org.opensim.modeling.AbstractProperty.updValueAsObject(AbstractProperty.java:96)

The "Container Interface" section here
https://simtk.org/api_docs/opensim/api_ ... perty.html

Thanks in advance!

Posted: **Wed Jan 29, 2020 8:46 am**

Please see the Matlab code I posted in Topic 9609: viewtopicPhpbb.php?f=91&t=9609

Posted: **Thu Jan 30, 2020 10:16 am**

awesome that works (using osim3.3)

for those wondering PropertyHelper was deprecated in osim3.1 but doc can be found here:
https://simtk.org/api_docs/opensim/api_ ... elper.html

Posted: **Mon May 04, 2020 5:12 am**

HI Tom,

I followed the link you have provided and as posted above this work for 3.3 implementation, but in 4.0 PropertyHelper seems to be Depricated. Is there a OpenSim4.0 equivalent ?

The only property class I have been able to access is PropertyString - which helps when I am trying to access information - but writing, for example, a double does not work using this class. There is apparently PropertyDbl - but I cannot seem to access it, and it is not even listed in the OpenSim API class list.

Thank you in advance for any information you can provide

Bryce

simtk.org

Set value of AbstractProperty

Set value of AbstractProperty

Re: Set value of AbstractProperty

Re: Set value of AbstractProperty

Re: Set value of AbstractProperty