Hi Radu and Maksym, thank you for your answer and kindness. Lately, I was also trying to use the command "RemoveBody()" in the Multicore environment to remove two bodies that falls out of my volume of interest. Otherwise, as they increase their distance from the other bodies, the simulation visibly slows down. However, when I implement this command I get the following error message at the beginning of the simulation. [image: Screenshot 2024-12-15 194044.png] Is there any other way to remove these two bodies from the simulation? Thanks in advance.
Gianni Il giorno venerdì 29 novembre 2024 alle 13:26:01 UTC+1 Radu Serban ha scritto: > Hi Gianni, > > > > ChBodyEasyCylinder creates a body representing a solid cylinder centered > at the body COM and aligned along the specified axis of the COM frame. The > body mass and inertia is set automatically assuming the cylinder is solid > and has constant density. > > AddCylinderGeometry allows you to attach a cylindrical shape (for > collision and, optionally also visualization) to an existing body. This > utility function allows you to position this cylinder arbitrarily relative > to the body COM. This is what “Position on body” represents (a translation > of the cylinder shape from the body COM and expressed in the body COM > frame. It is your responsibility to construct the body (including setting > its inertial properties). > > > > Note that ChBody::SetPos() sets the origin of the body COM frame relative > to the absolute coordinate. It is important to understand well all the > frames involved and in what frame various quantities are relative to and > expressed in. > > See for example the first figure on this Chrono documentation page: > https://api.projectchrono.org/development/collisions.html#collision_models_shapes > . > > > > --Radu > > > > *From:* projec...@googlegroups.com <projec...@googlegroups.com> *On > Behalf Of *Gianni Curti > *Sent:* Wednesday, November 20, 2024 7:26 PM > *To:* ProjectChrono <projec...@googlegroups.com> > *Subject:* [chrono] Difference between ChBodyEasyCylinder and > AddCylinderGeometry > > > > Hi, > > I have a question regarding the difference between the commands > "ChBodyEasyCylinder" and "AddCylinderGeometry". For what I have understood, > the first one automatically calculates the mass and inertia of a body > depending on the sizes and density given, while the second one provides > only the collision shape of a cylinder (neither mass nor density if they > are not manually given). However, I saw that there is the possibility of > assigning the "Position on body" when using "AddCylinderGeometry" through a > ChVector3d but the result is pretty different from what I obtain by using > "SetPos" when I also apply a rotation to the body. What does this command > do exactly? > > Thank you in advance for yout patience and kindness. > > > > Best Regards > > > > Gianni > > -- > 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 projectchron...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/projectchrono/10d9deb5-26b4-4ebe-a37b-41e1fdec1037n%40googlegroups.com > > <https://urldefense.com/v3/__https:/groups.google.com/d/msgid/projectchrono/10d9deb5-26b4-4ebe-a37b-41e1fdec1037n*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!LZqh0A2nDt0mRsewyds4KGDxAMXR0yiR6uVrKzMnUhhgRxnzpGL_G-mItt0BNX6E85FtgDOxibRx1YgTxMNb$> > . > -- 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 projectchrono+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/projectchrono/a4f47d9a-447f-4b8a-8381-8b0fd3b3efd1n%40googlegroups.com.
