the general tool to make structures using parametric functions implemented functions are wrinkles in form of ellipsoid and sine wave as well as nanotubes with parametric function.

usage: create_shape.py [-h] [--func FUNC] [--dir DIR] --A A --length LENGTH [--C C] --struct STRUCT [--intype INTYPE] [--adjust ADJUST] [--out OUT] [--outtype OUTTYPE]

Create a structure of a 2D layer which follows a parametric function

optional arguments: -h, --help show this help message and exit --func FUNC The parametric function will be (by default) 1 - sine, 2 - ellipsoidic, 3 - nanotube, 4 - hypotrochoid --dir DIR Create the wrinkle along the specified lattice vector (default=the smaller of 1. or 2. vector) --A A Amplitude of the wave or the 1st radius --length LENGTH Wavelength of the wave or the 2nd radius --C C For some curves a 3rd parameter is needed. --struct STRUCT The unit cell of the 2D layer, properly centered along z! --intype INTYPE Type of input file as used in ASE (default=xyz) --adjust ADJUST Adjust the wavelength, 0, or the amplitude, 1 (default=1) --out OUT Output file (default=L'length'A'A'.in) --outtype OUTTYPE Type of output file as used in ASE (default=aims)

as an example an input file is added to the repository. with the below line of code: python --func 1 --dir 1 --struct input.xyz --A 20 --length 100 the code tries to creat a sine wave with amplitude 20 and length 100.