Radu,
Yes, I tried to do something similar. ChElementSpring has the function
GetNodeN(int n), but this returns a ChNodeFEAbase (I don't know why is
programmed like that, because to create the spring you need two
ChNodeFEAxyz), and here it is not implemented the function GetPos() or
GetX0() as in other kind of nodes types.
I tried also creating a vector of nodes but its not an option becouse of
the order that they follow, the right solution would be similar to what you
said before, I need to extract the nodes from the element, but I am not
able to programate it.
Thanks,
Fran
El martes, 7 de junio de 2022 a las 10:30:43 UTC+2, Radu Serban escribió:
> Fran,
>
>
>
> Not with the current Chrono code.
>
> But why not do something like:
>
>
>
> std::vector<std::shared_ptr<ChElementSpring>> springs;
>
>
>
> // Create spring elements, add to mesh, add to list
>
> auto spring1 = chrono_types::make_shared<ChElementSpring>();
>
> spring1->SetNodes(nodeA, nodeB);
>
> mesh->AddElement(spring1);
>
> springs.push_back(spring1);
>
>
>
> auto spring2 = …
>
> …
>
> springs.push_back(spring2);
>
>
>
> // Simulation loop
>
> while(…) {
>
> …
>
> for (const auto& s : spring) {
>
> tools::drawSegment(vis.get(), s->GetNode(0)->GetPos(),
> s->GetNode(1)->GetPos());
>
> }
>
> …
>
> }
>
>
>
> --Radu
>
>
>
> P.S. Please continue conversations on the user mailing list. Thanks
>
>
>
> *From:* Fran Bottero <[email protected]>
> *Sent:* Tuesday, June 7, 2022 10:12 AM
> *To:* Radu Serban <[email protected]>
> *Subject:* Mensaje privado sobre: [chrono] ChElementSpring visualization
>
>
>
> Great,
>
>
>
> Yes its good enough and it's working, just one more question, as I have
> to join several number of nodes following an predefined order (that I
> indicated when I create the springs), is it possible to do it outside the
> while loop (for example, adding another propertie to the ChElementSpring)?
>
>
>
> Thanks,
>
>
>
> Fran
>
>
>
>
>
>
>
> El lunes, 6 de junio de 2022 a las 13:43:02 UTC+2, Radu Serban escribió:
>
> Hi Fran,
>
>
>
> If rendering a line between the two nodes is good enough, you can simply
> call the function drawSegment() within your simulation loop (before the
> call to EndScene) and pass it the locations of the two nodes you want
> connected.
> As an example, look at demo_IRR_gears
> <https://github.com/projectchrono/chrono/blob/eacf287b90483a5db51aa5fdb866a3a39892d85c/src/demos/irrlicht/demo_IRR_gears.cpp#L221>
> .
>
>
>
> --Radu
>
>
>
>
>
>
>
> *From:* [email protected] <[email protected]> *On
> Behalf Of *Fran Bottero
> *Sent:* Monday, June 6, 2022 1:28 PM
> *To:* ProjectChrono <[email protected]>
> *Subject:* [chrono] ChElementSpring visualization
>
>
>
> Hi there!
>
>
>
> I am trying to visualise spring elements (ChElementSpring) on irrlicht
> app, but it has been quite impossible for me. I found some examples and I
> could replicate them and visualise some links as springs (ChLinkTSDA), but
> it is not what I need because this kind of links need two bodies to be
> created, and that is so inefficient for my model.
>
> I was looking for a way to visualise the spring created between two nodes,
> my system is currently working. For simple models is possible to understand
> what is happening just with the representation of the nodes as dots, but if
> I want to make it more complex, will be so much easier to comprehend if I
> can see the springs on the irrlicht app.
>
> On my script, first of all, I create some nodes and elements:
>
>
>
> // Upper:
> auto nodeA = chrono_types::make_shared<ChNodeFEAxyz>(ChVector<>(0, Ly, 0));
> nodeA->SetMass(m);
> mesh->AddNode(nodeA);
>
> // Right:
> auto nodeB = chrono_types::make_shared<ChNodeFEAxyz>(ChVector<>(Lx, 0, 0));
> nodeB->SetMass(m);
> mesh->AddNode(nodeB);
>
> (…)
>
> // Upper-Right
> auto springAB = chrono_types::make_shared<ChElementSpring>();
> springAB->SetNodes(nodeA, nodeB);
> springAB->SetSpringK(K);
> springAB->SetDamperR(0);
> mesh->AddElement(springAB);
>
>
>
> Then I represent the nodes as dots, as you can see in the following code:
>
>
>
> auto visGlyph =
> chrono_types::make_shared<ChVisualizationFEAmesh>(*(mesh.get()));
>
> visGlyph->SetFEMglyphType(ChVisualizationFEAmesh::E_GLYPH_NODE_DOT_POS);
> visGlyph->SetFEMdataType(ChVisualizationFEAmesh::E_PLOT_NONE);
> visGlyph->SetSymbolsThickness(0.02);
> mesh->AddAsset(visGlyph);
>
>
>
> I also tried to represent the springs, as I did it before for other kind
> of elements (for example with ChBeamEulerAdvance) but I do not know how to
> configurate them. Is there any option or function to do it? I do not need
> something complex, with a simple line is enough.
>
>
>
> Thanks!
>
> Fran
>
> --
> You received this message because you are subscribed to the Google Groups
> "ProjectChrono" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/projectchrono/e5a30dc1-37ed-4d2e-b0e9-607c9186279fn%40googlegroups.com
>
> <https://groups.google.com/d/msgid/projectchrono/e5a30dc1-37ed-4d2e-b0e9-607c9186279fn%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
>
>
--
You received this message because you are subscribed to the Google Groups
"ProjectChrono" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/projectchrono/c94f531f-f002-4d8e-8189-2be1eb178c42n%40googlegroups.com.
