Noura

Hi nicklj,

Have you tried the restScale parameter in MechanicalObject.h ?
Data< SReal > restScale;

Example:

<MechanicalObject name="MO" src="@MO_loader" template="Vec3d" restScale="0.8" />


default value equals to 1.

Best,
Noura

Hi @hugo,

I haven’t implemented it. I only had a look at the code to propose a quick solution. But I’ll try to dedicate some time to implement it (because I have first to update my current sofa version).

Noura

Hi Pierre,

I have no clue how to export the stress values directly via the “VTKExporter” component. Maybe it is possible !
Also, I’m not sure if it is possible to get the stresses directly in the scene since that there is no data field called “stress” in the “TriangularFEMForceField” (FF).

Nevertheless, the stress values can be accessed and…[Read more]

Hello Pierre,

I think that you should be able to visualize the stresses using the following parameters from “TriangularFEMForceField.h”

Data<bool> showStressValue;
Data<bool> showStressVector;


Try this:

<TriangularFEMForceField name="FEM" youngModulus="100000" poissonRatio="0.3" method="large" showStressValue="true" showStressVector="false"…[Read more]

Hi Nancy,

you may have a look at this open source database from the IRCAD institute.

3Dircadb

Best,
Noura

Me neither not an expert 😉 I usually use Paraview in the same way you described, but I thought that there might be some magic configurations I don’t know. If I learned something interesting, I’ll share it.

Thanks,

Noura

Hi @Hugo,

The setting using the TetrahedronSetGeometryAlgorithms seems not bad at all !

BTW, when you mentioned ParaView, Do you mean by selecting the volume representation from the drop box in the toolbar, or am I missing something? A brief explanation of setting steps would be helpful as well.

Thanks,

Noura

Hi Hugo,

Exactly, I was looking for this config file for the CI.

Thanks,

Noura

Hello all,

I join Thabita clarifying the current state of configuring Sofa since that we are trying it together.

As @taro has already mentioned, the compilation is fine right now. However, a run time error happens when executing runSofa.exe, and which is probably related to the qwindows.dll which can not be located! I include the complete error…[Read more]

Hi all,

It is always an interesting topic.

In a simple simulation scenario, I applied a linear tensile force on a deformable object in the direction of its main axis. Using a Neo-Hookean behavior model, I noticed that the deformation is influenced by the number and size of elements (tetrahedrons).

However, it is possible to control the…[Read more]

Fine for me. Marked as resolved!
Noura

Hi Hugo,

I see. Thanks!
This means that I have to set youngModulus in MPa. and the force in Newton.

You also mentioned:

If the file mesh you load has values between 0 and 40

Non, they are not! The shape is not necessarily translated to the origin (0,0,0). The bounding box of the cuboid could be for instance [200 100 50 , 240 130 55]. Still,…[Read more]

Solved!
Actually It should be simply :

l_forceField->d_force.setValue(initForce.getValue());

Noura

Hello minj,

You can apply a constant force field to a certain node in your mesh (let say on the node with index 5), you supply the force direction and value (for instance 7 N. in the positive direction of Y axis), I included the “arrowSizeCoef” parameter which is optional just to help visualizing the force direction.


<ConstantForceField…[Read more]

Hi Hugo,

Yes, that’s true. I forgot to include a ConstraintCorrection in the deformed object node. Now it works fine.

Thanks for the quick hint!

Noura