Francois

Hi @Froy,

Thanks, that solves the problem!

Francois

Hi @jnbrunet,

I don’t get the timer output in batch mode with the default scene too. I get the other kinds of output though, like the ones you get by setting printLog = 1 in various components.

Tomorrow I’ll try to investigate if the program reaches TimerData::print(), which is where the timer output seems to be printed.

François

Hi @jnbrunet,

Yes, I included an integer for the sampling frequency. It only prints the times when using the gui. Whenever I add -g batch, the times are not printed. Is it normal?

Also, is --computationTimeOutputType json or ljson supposed to write the times in a file? I can’t find the location of these files, or rather they are created at all.

Francois

Hi @wzdy4444

I’ve been working on a collision algorithm for a simulation developed at my university. I’m not certain if Sofa has an implementation of continuous collision detection, but there is ways to integrate one with the freeAnimationLoop and the free positions. The part I’ve been struggling with is the response, where I try to use the…[Read more]

Hi @hugo,

Sorry for the late reply. I didn’t work on this since July. I had not made progress in preventing objects to penetrate each others using constraints for collision response.

I’ll try to dive more into the theory and math of the solvers, Lagrange multipliers and constraints. I think I need this to understand the code. However, I’m…[Read more]

Hi @hugo,

I saw that that the documentation improved a lot over the last few months. Thanks for all the work on this!

So far I made a discrete collision detection algorithm based on spatial subdivision that works well with the correct numerical settings (time step, alarm and contact distance). Now, I’m trying to adapt it to handle continuous…[Read more]

Hi @hugo,

Sorry for the late reply. It looks like I don’t receive emails anymore when my messages are answered.

I made some progress in the last few weeks. I understood some things about how the freeAnimationLoop and the free positions work. I’m using the freeAnimationLoop with the LCPConstraintSolver. However, I don’t fully understand the math…[Read more]

Hi Hugo,

Thanks for the reply. I added the relevant classes in https://github.com/FrancoisLeonard/SOFA_Custom_CollisionModels. There’s also a scene and its output in output.txt.

I’m mostly interested in solving the error:
[ERROR] [DefaultContactManager(collision response)] Contact default between ScytherPointCollisionModel and…[Read more]

Hi Hugo,

I will try again with LocalMinDistance.

For the rest_position, I was referring to your previous suggestion to impose the displacement on the rest_position and to add a RestShapeSpringForceField, rather then using LinearMovementConstraint. With what component can I do that?

Thanks,

François

Hi @hugo,

Sorry for the late reply. Why do you not advise to use DiscreteIntersection? In my scene, many objects are very close to each other. With proximity intersections, I haven’t been able to set the contact distance small enough so that the objects are not in collision from the start and yet have realistic looking collisions.

Also, how can…[Read more]

Hi,

The displacement is only imposed on one object. I don’t understand why the other object doesn’t deform or get pushed by it. I will try the RestShapeSpringForceField to see what it does.

Meanwhile, I’ve put a simplified scene here.

Thank you,

Francois

I tried to build the master branch, but I get several instances of
In file included from /home/franc/sofa/src/SofaGeneral/../modules/SofaDenseSolver/NewMatMatrix.h:29:
/home/franc/sofa/src/modules/SofaDenseSolver/NewMatVector.h:28:10: fatal error:
'newmat/newmatio.h' file not found

I will try to cherry pick all changes in the SofaCUDA…

Hi Hugo,

Thanks for the help. With the commit fixing the issue, the code compiles, but runSofa crashes when starting. Here is the trace:

########## SIG 6 - SIGABRT: usually caused by an abort() or assert() ##########
-> /home/franc/sofa/build/install/bin/../lib/libSofaHelper.so.18.12.00(sofa::helper::BackTrace::dump()+0x20) [0x7f864c6874b0]
->…[Read more]