Function Lesson

papawo

I badly needed lesson to fully understand how to do this.

Is there a tutorial or lesson out there ? 

ilya_baran

This is our FeatureScript tutorial -- highly recommended: https://cad.onshape.com/FsDoc/tutorials/create-a-slot-feature.html
Overall documentation is here: https://cad.onshape.com/FsDoc/index.html

papawo

Im referring to fully understand  these kind of function.

ilya_baran

The first function is discussed here: https://cad.onshape.com/FsDoc/library.html#module-attributes.fs
The second one is for our (internal) use only currently -- it is not documented, supported, and may not work at all.

lana

Documentation for FS attribute functionality is in https://cad.onshape.com/FsDoc/library.html#module-attributes.fs or in comments in attribute.fs  You can attach attributes to topology ( bodies, faces, edges, vertices) and then use qAttributeQuery to find that topology by the attribute pattern. Any FS value can be an attribute. We've been mostly using custom type attributes for particular functionality, see sheetMetalAttribute.fs for example.