[jordi.muela]

Hi all,

I'm programming a new class for six DoF motion to allow socket comunication for cosimulation with other tool (exchanging force data..). And I'm having a trouble, how can I consult the current time value?

Now I'm doing a little (...big!) trick using system():

system("grep 'Time = ' log.interDyMFoam | tail -n 1 | sed 's/Time = //g' > calcTime");

and then I can read the time from file calcTime, but I thought must be a better and elegant way... I've taked a look to "timeVaryingUniformFixedValuePointPatchField" since this BC must consult the time to do the proper interpolation, and it looks like the solution must come from a function called db(), which is declared in "pointPatchField"... but I'm falling in black-hole of classes and I can't see the light. So please, if somebody can show me the way of do this I'll be very pleased!

Thanks!!

Best regards,

Jordi.

Edit: now I see that I've had a lapsus with thread title, I'm interested in the actual time, no in time step! Thanks! And sorry the mistake...

[ngj]

Hi Jordi

I do not know if I completely understand your problem. Do you want to have the current time in seconds? Then you can merely write

mesh_.time().value()

or if you are not having the mesh, but some other object, say U, then use

U_.thisDb().time().value()

If you omit the "value()" part of the call, you will get a dimensionedScalar, however, if you add value(), the dimensional information is stripped and you achieve a scalar.

Best regards,

Niels

[jordi.muela]

Hi Niels!

First of all, thanks for your quick answer.

Yes, that's exactly what I want, the current time in seconds.

Unfortunatelly, I don't have the mesh or some other object like U or p, I only have some vars like "int port_; string host_; ...". I've tried "thisDb().time().value()" but as I thought doesn't compile... To make you an idea, my C files are similar to:

/src/postProcessing/functionObjects/forces/pointPatchFields/derived/sixDoFRigidBodyMotion/sixDoFRigidBodyMotionRestraint/linearSpring$

Best regards,

Jordi.

[ngj]

Hi Jordi

I do not know if will work, but try doing the thisDb on the dictionary. It is not a IOdictionary, but you might be able to exploit it.

Otherwise, you need to call the object with the current time as an argument? Or construct with e.g. the mesh?

Bests,

Niels

[jordi.muela]

Hi Niels,

I've added an object "const dictionary sDoFRBMLDict_;" and at constructor assigned the value of the dictionary "sDoFRBMLDict_(sDoFRBMLDict)", and used sDoFRBMLDict_.thisDb().time().value(); but the compiler says:

error: ‘const class Foam::dictionary’ has no member named ‘thisDb’

So I guess that I have two options, continue using the actual "dirty" way or as you propose construct the object for example with the mesh.... but I intended to modify less layers of code as possible... I have to look how to do it!
Well it looks that will be harder than I thought As "backup method" the dirty way works jeje.

Thanks for your help Niels.

Jordi.

[jordi.muela]

Hi All,

Ok, it's solved.

Finally I added an argument to the method. If someone is interested, at:

sixDoFRigidBodyDisplacementPointPatchVectorField.C
uncoupledSixDoFRigidBodyDisplacementPointPatchVect orField.C

in updateCoeffs() function you can find const Time& t = mesh.time(); and when call motion_.updateForce:

motion_.updateForce
(
fm.first().first() + fm.first().second() + g_*motion_.mass(),
fm.second().first() + fm.second().second(),
t.deltaTValue(),
//Modified
t.value()
);

then make the appropriate modifications to sixDoFRigidBodyMotion.C, sixDoFRigidBodyMotion.H and proper subfiles...

Best regards,

Jordi