What's the difference between "Tree geometry" and "Geodata" in Mechanical API?

Pernelle Marone-Hitz

See above.

Pernelle Marone-Hitz

One important thing to understand with geometry in Mechanical : there are two sorts of "geometry" with different sets of IDs:

• The bodies in the Mechanical tree have their own ID, as objects of the Mechanical tree, pretty much like a fixed support boundary condition, or any other object in the tree, will have an ID. These objects are grabbed by ExtAPI.DataModel.Project.Model.Geometry.Children
• The "real" geometry (the one that is plotted, which you can zoom, rotate, pan, select bodies, faces, edges on etc) also have their sets of ids (there are IDs for bodies, faces, edges, vertices, etc). These objects are grabbed by ExtAPI.DataModel.GeoData

There are ways to get the IDs of the geodata geometry from the tree geometry and the other way around:

my_tree_body = ExtAPI.DataModel.Project.Model.Geometry.GetBody(my_geobody)
my_geo_body = my_tree_body.GetGeoBody()