hi,

Thanks again for your reply.
I deleted all mutable variables but the code still hang. I tried to locate where it get stuck and found it continued doing some update of Delay Measure data.

hi, Thanks for the rapid reply. I have run several times and the code hanged after 20-50 iterations(Each time is different). I used a mutable variable to record the optimization steps. To keep thread safe, I created mutex to avoid modifying it by different threads. now I declared them in global scop...

hi all,

I am using CMAES optimizer to optimize my objective function.
If I didnt run it by multithread, it would work well, but get stuck after several steps when I enable multithread option.
Anyone has meet the similar problem?

thanks in advance,
jiang

hi, OpenSim api c++ exe. application will generate a output.txt file. This is realized by redirect cout to both standard and txt file. Is it possible to let it not output result to a txt.file or change the output directory of it? Is there any method in LogManager class to realize it? thanks in advan...

Thanks Jiang as always, I will look into the documentation. Hope this acceleration includes the linear and rotational values. Jiang, I have a construction of a body A welded to body B, and I want to find the force vectors on body B's com. So if I multiply the the mass of body B with the acceleratio...

There are some functions in SimBodyEngine class to get force, kinematics information like:

void OpenSim::SimbodyEngine::getAcceleration
(const SimTK::State & s,
const OpenSim::Body & aBody,
const SimTK::Vec3 & aPoint,
SimTK::Vec3 & rAcc ) const

Please check OpenSim Doxygen.

best regards,
jiang

Also some small problems of your code


int re = 6; should be double re=6*SimTK::PI/180
int tf = osimState.getTime(); should be double tf=osimState.getTime();
if (tf=finalTime) should be if(tf==finalTime) or if(fabs(tf-finalTime)<1.0e-6)

Your purpose is unclear. If you wanted Coordinate B to keep constant all the time during simulation, why not add constraint to B in the model, and then minimize the constraint force of it? If you just wanted Coordinate B to be a constant value at the final time of simulation, constraints[0] = codB.g...

Sorry for the trouble.

I found OpenSim::RollingOnSurfaceConstraint in OpenSim which has almost same
function as that in SimTK.

hi all,

i want to implement a ballRollingOnPlane constraint between feet and the ground.
But I found there is no entry point for this class in OpenSim_SimTKsimbody.dll.
Is it available in the newest version and shall i build the new one to substitute one in opensim?

best regards,
jiang