[Zahra]

I am again here to ask more questions about this topic.

1. I need to lift up or down a specific point of a tissue to a certain extent. Is there any way to define these specifications?

2. Which program contains command for picking objects using shift+left mouse button?

Thanks for help in advance.

Zahra

[Zahra]

Dear Hugo,

Thank you for your kind reply. Yes changing time step resulted in no more instabilities.

I have changed the topology from quadrilateral to triangular for a while. If it works for my purpose, I would not need quadrilateral FEMForceField anymore. I will ask for your kind help in case I need to develop it in future.

Best,

Zahra

[Zahra]

Thank you Hugo for the support.

Best,

Zahra

[Zahra]

Hi Guillaume,

Bilger’s Both solutions are applicable, but they have some disadvantages as Bilger also mentioned, however, I think you can tag it solved.

Best,
Zahra

[Zahra]

Hi again,

I now understand what my problem is. It seems that the format of my .msh file is not supported by SOFA.

Best,

Zahra

[Zahra]

Dear Hugo,

Now I am not sure to get your reply. I do not understand what you mean of IDs.
There is no visualization tab in TriangleSetTopologyAlgorithms (also there is no pure SetTopologyAlgorithms in components). I think you meant TriangularSetGeometryAlgorithms. In its visualization tab there are options for showing points, edges and triangles indices. Are they IDs?

Actually, What I exactly want to do in sofa is this:
I want to simulate a cloth. I edited this scene:
sofa\examples\Tutorials\Topologies\TopologySurfaceDifferentMesh.scn

I deleted cloth static mesh and cloth regular mesh nodes and just kept the cloth dynamic mesh node. Now, As I need to have a different mesh with more vertices, I load my .msh file in property window of MeshGmshLoader. In this window, there are other information about the previous mesh, such as the position (which is equal to the number of nodes of square3.msh), the edges and triangles. So when I change the mesh, I do not need to change these values?

By loading my file, I get this errors:
error: File “….msh” finally appears not to be a gmsh file.
error: TriangularBendingSprings: object must have a triangular set topology.
error: TriangularFEMForceField: object must have a triangular set topology.
My file is .msh (I generated it by blender) and its topology is triangular. So I thought the reason that sofa can not define the mesh as triangular is that I did not define the number of edges and triangles truly.

Do you have any idea what is the problem?

Cheers,

Zahra

[Zahra]

Dear Hugo,

Thank you for your reply. Yes I meant quadrilateral.

Your proposed scene is using regularGridTopology which creates a regular mesh using only boundaries and the scaling without uploading any quadrilateral mesh. I also could not change the properties of this component to produce another quadilateral mesh as I do not have any knowledge about its properties. Besides, the simulated mesh becomes unstable during interactions in some conditions.

[Zahra]

How can I export the vertices to obj file while I make some deformations on the mesh with shift+left button? Pressing “o” while I use shift+left button does not work.

[Zahra]

Dear Alex and Zargham,

Thank you for your quick great helps.

Zahra

[Author]

Posts