Perfect,
I was trying to do a static_cast, I didn't know that it was possible to do
a static_pointer_cast. Now its working correctly.
Thank you very much Radu,
El martes, 7 de junio de 2022 a las 14:10:14 UTC+2, Radu Serban escribió:
> Fran,
>
>
>
> Indeed.
> GetNodeN must return a ChNodeFEAbase because it is a virtual method of the
> base class ChElementBase.
>
>
>
> You need to cast the nodes to the proper type to get their positions.
> Something like:
>
> for (const auto& s : spring) {
>
> tools::drawSegment(vis.get(),
>
>
> std::static_pointer_cast<ChNodeFEAxyz>(s->GetNode(0))->GetPos(),
>
>
>
>
> std::static_pointer_cast<ChNodeFEAxyz>(s->GetNode(1))->GetPos());
>
> }
>
>
>
> --Radu
>
>
>
> *From:* [email protected] <[email protected]> *On
> Behalf Of *Fran Bottero
> *Sent:* Tuesday, June 7, 2022 1:44 PM
> *To:* ProjectChrono <[email protected]>
> *Subject:* [chrono] ChElementSpring visualization
>
>
>
> 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
>
> <https://groups.google.com/d/msgid/projectchrono/c94f531f-f002-4d8e-8189-2be1eb178c42n%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/9a5bb90f-52c0-4297-a951-12a5fcd16a7fn%40googlegroups.com.
