Hi,I would like to know if does exit a similar LISP routine to Flipface.lsp but for Polylines and 3Dpolylines in order to flip its contour direction(clokwise to counter clockwise and viseversa ???....I am drawing for a auditorium Acoustic Design but when I use MIRROR command in  AutoCad 2015, this change the initial direction of the curve using polyline: this is a serious problem in the acoustics software that I use for. I can do this one by one in the Acoustic app but there are many surfaces (closed curves defined by 2D polylines and 3Dpolylinee only!), 8,000 aprox.!....and I am searching for a LSP routine in order to do ALL this work at once!!.Any comments will be appreciate!opacheco.

FlipFace (for faces) is available on the Download page. For polylines you can use the REVERSE command in AutoCAD.