Comment 1 for bug 1746037

Hi Jérôme,
Chained cylinders are considered deprecated, they should be replaced by PFacets and friends - hence removed at some point (better NOT use them). No point improving the doc then.

Besides, one of your comment overlooked the meaning of inheritance in c++ in general and in Yade:
"Do we agree Ig2_ChainedCylinder_ChainedCylinder_ScGeom6D actually return a ChCylGeom6D instance [5] ?
And neither a ScGeom6D (as the name suggests), nor a ScGeom"

Inheritance in c++ must be understood as "B is a A" if B inherits from A. So not only Ig2_ChainedCylinder_ChainedCylinder_ScGeom6D is really returning a ScGeom, *and* also a ScGeom6D (*and* more exactly a ChCylGeom6D); its purpose is really to return a ScGeom[6D] so that older law functors can be used unmodified.
That would not be possible if ChCylGeom6D was not a ScGeom. The doc is thus correct even though it may seem inaccurate.

Bruno