Hi Pilou,

> Seems that for make boolean operations objects
> must be first components ! ?

A lot of "Mechanical CAD" programs don't really rely on booleans so much as you might use in MoI - instead they're generally more focused on creating a mechanical part by drawing some 2D sketches on different faces of the model and then creating a "feature" like an extrusion or a revolve that adds or removes material from the base part.

Some of these kinds of programs actually only focus on building 1 single object at a time in a "part modeler" and then you go to a separate "assembly modeler" program to bring all the parts together (although that's not the case with this particular program).


> From the video of the guitare at the end seems we can
> modify measures from enter numeric text
> Is that history ?

In this case it's not exactly history - it's more what is called a "constraint", although history can be used to make similar kinds of edits as well.

History is about maintaining the sequence of operations that went into building the model, and then when you change something those operations are recalculated to rebuild the model.

A "history free" or direct modeler like this Autodesk app works kind of differently - it makes modifications by directly analyzing the current model state (like figuring out how to extend surfaces and trim off pieces of the current model), instead of using the sequence of modeling operations.

- Michael