Building TPC geometry

[lunivilen]

Hello, we are working on a project related to the TPС detector, which is a tube with a regular duodecagon in X-Y projection (see pictures).

We are converting ROOT geometry to ACTS and we bumped into problem, that tube (with a regular duodecagon in X-Y projection) cannot be accurately represented using cylindrical layers. Is there another method for representing such figures in the geometry of the ACTS?

TPC X-Y view

TPC Rotated view