Hi,

any idea why the command marker.getParentFrame();, throws up an error in C++. It states exception, ComoinentHasNoSysten at memory location

Thank you

Hi Mohammadreza,

Thank you. Just to confirm this would give me the marker position in the body reference frame (anatomical reference frame) for each point? And it would not be a constant value ?

Thanks

Hi, I am trying to see if I can determine STA metrics in OpenSim as defined by Grimpampi. I thought the position of the marker in body reference frame would change, so I added a function to SimBody to determine that during IK (image added). But the position remains the same and the transformation ch...

Hi, During the IK process, marker errors and locations are calculated in the global coordinate system. But inside, they are transformed from the bone embedded coordinate system to the global coordinate system. If we perform the inverse transform, would we get the marker position in each segment coor...

Hi Pagnon David,

Sorry I might be speaking out of turn but I found your question very interesting and thought the following post might help : viewtopicPhpbb.php?f=91&t=3854&p=22173&start=0&view=

It is quite old, so I am not sure if it still valid today.

Hi,

Any luck on the questions above?
Additionally, it is possible to simulate bodies as 6DoF models? That is remove all constraints? For example between pelvis and femur

Thanks,
Vignesh

Hi, Thanks a lot for the continuing good work. I have a couple of questions regarding the inverse kinematic operations: 1) In function "findcurrentmarkerlocation", the marker position is transformed to the ground reference frame using the rotation matrix from its associated body to ground reference....

Thanks. So if I would like to calculate JRF, is there a particular reason the recommended process is :
IK-> ID->SO->JRF

Is there a benefit of performing the ID step

Hello,

I would like to understand how the output of Inverse dynamics is used by static optimisation? Based on the tutorials, I am not sure where the output of ID is fed? Or does static optimisation perform ID by itself?

Thanks
Vignesh