The coordinates are expected to refer to the internal frame. If you describe your cell in Cartesian coordinates, then the internal frame is simply the Cartesian coordinate system. If polar coordinates are used however, then you should supply the following parameters:
for x: log(r) for y: \φ, in radians for z: z
The z-coordinate is not affected by any of the conformal mappings currently in use by the program.
These mappings can be performed with the POLAR_TO_INTERNAL procedure.
vr = vx/r vphi = vy/r vz is invariant
Formatted on 21/01/18 at 16:55.