I confirm that I can generate Graphics3D objects with the first option.

sim = SystemModelSimulate[ "Modelica.Mechanics.MultiBody.Examples.Elementary.DoublePendulum"] g3d = Table[sim["Graphics3D", t], {t, 0, 3, 1}]

However, I am stuck because I cannot export the Graphics3D objects. I have tried

dName = NotebookDirectory[]; Export[StringJoin[dName, "t1.lwo"], g3d[[1]]]

and got an error.

Graphics3D contains no data that can be exported to the LWO format.

I also tried 3ds, dxf, and dae and got the same error for the respective format.

After reading posts on various forums I have concluded that the Export[] does not support the Graphics3D object that comes out from the simulation. It seems that the problem is with the Translate part of the Graphics3D object. Here are some details of the StackTrace of the error.

Export["C:\\t1.lwo", Graphics3D[{Translate[ GeometricTransformation[{RGBColor[0., 0.494949494949495, 1.], Specularity[6., 40], ...

So is there a way to convert the Graphics3D object to something exportable? I have tried the solution here but it did not work.

Thank you,

B

The Tech Support request has not reached us yet at Wolfram MathCore, but we'll take a shot to reply here. We have some very experimental and undocumented support for the reproduction of 3D graphics produced in System Modeler simulation results in Mathematica. The corresponding Graphics3D objects at time t are produced with sim["Graphics3D", t], with sim being the SystemModelSimulationData object. For instance: If this works for your model, then you could then export these objects. But from the phrasing of your question you seem to want to export each multibody object separately in a directory structure at each time step. In that case, the call above may still be helpful. You can selectively turn off the animation of all but one of the bodies and request the model's "Graphics3D" so that you can get one body at a time as a Graphics3D, and proceed to do this with each individual body: Then there is the possibility that the "Graphics3D" property does not work for your model, in which case, you may have to extract by hand the simulation results for the positions and alignments of the individual objects, generate Graphics3D objects from them, and them exporting them independently as you choose to.